suvadityamuk/huggingface-transformers-code-dataset

# Generating the documentation To generate the documentation, you first have to build it. Several packages are necessary to build the doc, you can install them with the following command, at the root of the code repository: ```bash pip install -e ".[docs]" ``` Then you need to install our special tool that builds the documentation: ```bash pip install git+https://github.com/huggingface/doc-builder ``` --- **NOTE** You only need to generate the documentation to inspect it locally (if you're planning changes and want to check how they look before committing for instance). You don't have to commit the built documentation. --- ## Building the documentation Once you have setup the `doc-builder` and additional packages, you can generate the documentation by typing the following command: ```bash doc-builder build transformers docs/source/en/ --build_dir ~/tmp/test-build ``` You can adapt the `--build_dir` to set any temporary folder that you prefer. This command will create it and generate the MDX files that will be rendered as the documentation on the main website. You can inspect them in your favorite Markdown editor. ## Previewing the documentation To preview the docs, first install the `watchdog` module with: ```bash pip install watchdog ``` Then run the following command: ```bash doc-builder preview {package_name} {path_to_docs} ``` For example: ```bash doc-builder preview transformers docs/source/en/ ``` The docs will be viewable at [http://localhost:3000](http://localhost:3000). You can also preview the docs once you have opened a PR. You will see a bot add a comment to a link where the documentation with your changes lives. --- **NOTE** The `preview` command only works with existing doc files. When you add a completely new file, you need to update `_toctree.yml` & restart `preview` command (`ctrl-c` to stop it & call `doc-builder preview ...` again). --- ## Adding a new element to the navigation bar Accepted files are Markdown (.md). Create a file with its extension and put it in the source directory. You can then link it to the toc-tree by putting the filename without the extension in the [`_toctree.yml`](https://github.com/huggingface/transformers/blob/main/docs/source/en/_toctree.yml) file. ## Renaming section headers and moving sections It helps to keep the old links working when renaming the section header and/or moving sections from one document to another. This is because the old links are likely to be used in Issues, Forums, and Social media and it'd make for a much more superior user experience if users reading those months later could still easily navigate to the originally intended information. Therefore, we simply keep a little map of moved sections at the end of the document where the original section was. The key is to preserve the original anchor. So if you renamed a section from: "Section A" to "Section B", then you can add at the end of the file: ``` Sections that were moved: [ <a href="#section-b">Section A</a><a id="section-a"></a> ] ``` and of course, if you moved it to another file, then: ``` Sections that were moved: [ <a href="../new-file#section-b">Section A</a><a id="section-a"></a> ] ``` Use the relative style to link to the new file so that the versioned docs continue to work. For an example of a rich moved section set please see the very end of [the Trainer doc](https://github.com/huggingface/transformers/blob/main/docs/source/en/main_classes/trainer.md). ## Writing Documentation - Specification The `huggingface/transformers` documentation follows the [Google documentation](https://sphinxcontrib-napoleon.readthedocs.io/en/latest/example_google.html) style for docstrings, although we can write them directly in Markdown. ### Adding a new tutorial Adding a new tutorial or section is done in two steps: - Add a new file under `./source`. This file can either be ReStructuredText (.rst) or Markdown (.md). - Link that file in `./source/_toctree.yml` on the correct toc-tree. Make sure to put your new file under the proper section. It's unlikely to go in the first section (*Get Started*), so depending on the intended targets (beginners, more advanced users, or researchers) it should go in sections two, three, or four. ### Translating When translating, refer to the guide at [./TRANSLATING.md](https://github.com/huggingface/transformers/blob/main/docs/TRANSLATING.md). ### Adding a new model When adding a new model: - Create a file `xxx.md` or under `./source/model_doc` (don't hesitate to copy an existing file as template). - Link that file in `./source/_toctree.yml`. - Write a short overview of the model: - Overview with paper & authors - Paper abstract - Tips and tricks and how to use it best - Add the classes that should be linked in the model. This generally includes the configuration, the tokenizer, and every model of that class (the base model, alongside models with additional heads), both in PyTorch and TensorFlow. The order is generally: - Configuration - Tokenizer - PyTorch base model - PyTorch head models - TensorFlow base model - TensorFlow head models - Flax base model - Flax head models These classes should be added using our Markdown syntax. Usually as follows: ``` ## XXXConfig [[autodoc]] XXXConfig ``` This will include every public method of the configuration that is documented. If for some reason you wish for a method not to be displayed in the documentation, you can do so by specifying which methods should be in the docs: ``` ## XXXTokenizer [[autodoc]] XXXTokenizer - build_inputs_with_special_tokens - get_special_tokens_mask - create_token_type_ids_from_sequences - save_vocabulary ``` If you just want to add a method that is not documented (for instance magic methods like `__call__` are not documented by default) you can put the list of methods to add in a list that contains `all`: ``` ## XXXTokenizer [[autodoc]] XXXTokenizer - all - __call__ ``` ### Writing source documentation Values that should be put in `code` should either be surrounded by backticks: \`like so\`. Note that argument names and objects like True, None, or any strings should usually be put in `code`. When mentioning a class, function, or method, it is recommended to use our syntax for internal links so that our tool adds a link to its documentation with this syntax: \[\`XXXClass\`\] or \[\`function\`\]. This requires the class or function to be in the main package. If you want to create a link to some internal class or function, you need to provide its path. For instance: \[\`utils.ModelOutput\`\]. This will be converted into a link with `utils.ModelOutput` in the description. To get rid of the path and only keep the name of the object you are linking to in the description, add a ~: \[\`~utils.ModelOutput\`\] will generate a link with `ModelOutput` in the description. The same works for methods so you can either use \[\`XXXClass.method\`\] or \[\`~XXXClass.method\`\]. #### Defining arguments in a method Arguments should be defined with the `Args:` (or `Arguments:` or `Parameters:`) prefix, followed by a line return and an indentation. The argument should be followed by its type, with its shape if it is a tensor, a colon, and its description: ``` Args: n_layers (`int`): The number of layers of the model. ``` If the description is too long to fit in one line, another indentation is necessary before writing the description after the argument. Here's an example showcasing everything so far: ``` Args: input_ids (`torch.LongTensor` of shape `(batch_size, sequence_length)`): Indices of input sequence tokens in the vocabulary. Indices can be obtained using [`AlbertTokenizer`]. See [`~PreTrainedTokenizer.encode`] and [`~PreTrainedTokenizer.__call__`] for details. [What are input IDs?](../glossary#input-ids) ``` For optional arguments or arguments with defaults we follow the following syntax: imagine we have a function with the following signature: ``` def my_function(x: str = None, a: float = 1): ``` then its documentation should look like this: ``` Args: x (`str`, *optional*): This argument controls ... a (`float`, *optional*, defaults to 1): This argument is used to ... ``` Note that we always omit the "defaults to \`None\`" when None is the default for any argument. Also note that even if the first line describing your argument type and its default gets long, you can't break it on several lines. You can however, write as many lines as you want in the indented description (see the example above with `input_ids`). #### Writing a multi-line code block Multi-line code blocks can be useful for displaying examples. They are done between two lines of three backticks as usual in Markdown: ```` ``` # first line of code # second line # etc ``` ```` We follow the [doctest](https://docs.python.org/3/library/doctest.html) syntax for the examples to automatically test the results to stay consistent with the library. #### Writing a return block The return block should be introduced with the `Returns:` prefix, followed by a line return and an indentation. The first line should be the type of the return, followed by a line return. No need to indent further for the elements building the return. Here's an example of a single value return: ``` Returns: `List[int]`: A list of integers in the range [0, 1] --- 1 for a special token, 0 for a sequence token. ``` Here's an example of a tuple return, comprising several objects: ``` Returns: `tuple(torch.FloatTensor)` comprising various elements depending on the configuration ([`BertConfig`]) and inputs: - ** loss** (*optional*, returned when `masked_lm_labels` is provided) `torch.FloatTensor` of shape `(1,)` -- Total loss is the sum of the masked language modeling loss and the next sequence prediction (classification) loss. - **prediction_scores** (`torch.FloatTensor` of shape `(batch_size, sequence_length, config.vocab_size)`) -- Prediction scores of the language modeling head (scores for each vocabulary token before SoftMax). ``` #### Adding an image Due to the rapidly growing repository, it is important to make sure that no files that would significantly weigh down the repository are added. This includes images, videos, and other non-text files. We prefer to leverage a hf.co hosted `dataset` like the ones hosted on [`hf-internal-testing`](https://huggingface.co/hf-internal-testing) in which to place these files and reference them by URL. We recommend putting them in the following dataset: [huggingface/documentation-images](https://huggingface.co/datasets/huggingface/documentation-images). If an external contribution, feel free to add the images to your PR and ask a Hugging Face member to migrate your images to this dataset. ## Styling the docstring We have an automatic script running with the `make style` comment that will make sure that: - the docstrings fully take advantage of the line width - all code examples are formatted using black, like the code of the Transformers library This script may have some weird failures if you made a syntax mistake or if you uncover a bug. Therefore, it's recommended to commit your changes before running `make style`, so you can revert the changes done by that script easily. # Testing documentation examples Good documentation often comes with an example of how a specific function or class should be used. Each model class should contain at least one example showcasing how to use this model class in inference. *E.g.* the class [Wav2Vec2ForCTC](https://huggingface.co/docs/transformers/model_doc/wav2vec2#transformers.Wav2Vec2ForCTC) includes an example of how to transcribe speech to text in the [docstring of its forward function](https://huggingface.co/docs/transformers/model_doc/wav2vec2#transformers.Wav2Vec2ForCTC.forward). ## Writing documentation examples The syntax for Example docstrings can look as follows: ``` Example: ```python >>> from transformers import Wav2Vec2Processor, Wav2Vec2ForCTC >>> from datasets import load_dataset >>> import torch >>> dataset = load_dataset("hf-internal-testing/librispeech_asr_demo", "clean", split="validation") >>> dataset = dataset.sort("id") >>> sampling_rate = dataset.features["audio"].sampling_rate >>> processor = Wav2Vec2Processor.from_pretrained("facebook/wav2vec2-base-960h") >>> model = Wav2Vec2ForCTC.from_pretrained("facebook/wav2vec2-base-960h") >>> # audio file is decoded on the fly >>> inputs = processor(dataset[0]["audio"]["array"], sampling_rate=sampling_rate, return_tensors="pt") >>> with torch.no_grad(): ... logits = model(**inputs).logits >>> predicted_ids = torch.argmax(logits, dim=-1) >>> # transcribe speech >>> transcription = processor.batch_decode(predicted_ids) >>> transcription[0] 'MISTER QUILTER IS THE APOSTLE OF THE MIDDLE CLASSES AND WE ARE GLAD TO WELCOME HIS GOSPEL' ``` ``` The docstring should give a minimal, clear example of how the respective model is to be used in inference and also include the expected (ideally sensible) output. Often, readers will try out the example before even going through the function or class definitions. Therefore, it is of utmost importance that the example works as expected. ## Docstring testing To do so each example should be included in the doctests. We use pytests' [doctest integration](https://docs.pytest.org/doctest.html) to verify that all of our examples run correctly. For Transformers, the doctests are run on a daily basis via GitHub Actions as can be seen [here](https://github.com/huggingface/transformers/actions/workflows/doctests.yml). ### For Python files Run all the tests in the docstrings of a given file with the following command, here is how we test the modeling file of Wav2Vec2 for instance: ```bash pytest --doctest-modules src/transformers/models/wav2vec2/modeling_wav2vec2.py -sv --doctest-continue-on-failure ``` If you want to isolate a specific docstring, just add `::` after the file name then type the whole path of the function/class/method whose docstring you want to test. For instance, here is how to just test the forward method of `Wav2Vec2ForCTC`: ```bash pytest --doctest-modules src/transformers/models/wav2vec2/modeling_wav2vec2.py::transformers.models.wav2vec2.modeling_wav2vec2.Wav2Vec2ForCTC.forward -sv --doctest-continue-on-failure ``` ### For Markdown files You can test locally a given file with this command (here testing the quicktour): ```bash pytest --doctest-modules docs/source/quicktour.md -sv --doctest-continue-on-failure --doctest-glob="*.md" ``` ### Writing doctests Here are a few tips to help you debug the doctests and make them pass: - The outputs of the code need to match the expected output **exactly**, so make sure you have the same outputs. In particular doctest will see a difference between single quotes and double quotes, or a missing parenthesis. The only exceptions to that rule are: * whitespace: one give whitespace (space, tabulation, new line) is equivalent to any number of whitespace, so you can add new lines where there are spaces to make your output more readable. * numerical values: you should never put more than 4 or 5 digits to expected results as different setups or library versions might get you slightly different results. `doctest` is configured to ignore any difference lower than the precision to which you wrote (so 1e-4 if you write 4 digits). - Don't leave a block of code that is very long to execute. If you can't make it fast, you can either not use the doctest syntax on it (so that it's ignored), or if you want to use the doctest syntax to show the results, you can add a comment `# doctest: +SKIP` at the end of the lines of code too long to execute - Each line of code that produces a result needs to have that result written below. You can ignore an output if you don't want to show it in your code example by adding a comment ` # doctest: +IGNORE_RESULT` at the end of the line of code producing it.

transformers/docs/README.md/0

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2

# Pipelines für Inferenzen Die [`pipeline`] macht es einfach, jedes beliebige Modell aus dem [Hub](https://huggingface.co/models) für die Inferenz auf jede Sprache, Computer Vision, Sprache und multimodale Aufgaben zu verwenden. Selbst wenn Sie keine Erfahrung mit einer bestimmten Modalität haben oder nicht mit dem zugrundeliegenden Code hinter den Modellen vertraut sind, können Sie sie mit der [`pipeline`] für Inferenzen verwenden! In diesem Beispiel lernen Sie, wie: * Eine [`pipeline`] für Inferenz zu verwenden. * Einen bestimmten Tokenizer oder ein bestimmtes Modell zu verwenden. * Eine [`pipeline`] für Audio-, Vision- und multimodale Aufgaben zu verwenden. <Tip> Eine vollständige Liste der unterstützten Aufgaben und verfügbaren Parameter finden Sie in der [`pipeline`]-Dokumentation. </Tip> ## Verwendung von Pipelines Obwohl jede Aufgabe eine zugehörige [`pipeline`] hat, ist es einfacher, die allgemeine [`pipeline`]-Abstraktion zu verwenden, die alle aufgabenspezifischen Pipelines enthält. Die [`pipeline`] lädt automatisch ein Standardmodell und eine Vorverarbeitungsklasse, die für Ihre Aufgabe inferenzfähig ist. 1. Beginnen Sie mit der Erstellung einer [`pipeline`] und geben Sie eine Inferenzaufgabe an: ```py >>> from transformers import pipeline >>> generator = pipeline(task="text-generation") ``` 2. Übergeben Sie Ihren Eingabetext an die [`pipeline`]: ```py >>> generator( ... "Three Rings for the Elven-kings under the sky, Seven for the Dwarf-lords in their halls of stone" ... ) # doctest: +SKIP [{'generated_text': 'Three Rings for the Elven-kings under the sky, Seven for the Dwarf-lords in their halls of stone, Seven for the Iron-priests at the door to the east, and thirteen for the Lord Kings at the end of the mountain'}] ``` Wenn Sie mehr als eine Eingabe haben, übergeben Sie die Eingabe als Liste: ```py >>> generator( ... [ ... "Three Rings for the Elven-kings under the sky, Seven for the Dwarf-lords in their halls of stone", ... "Nine for Mortal Men, doomed to die, One for the Dark Lord on his dark throne", ... ] ... ) # doctest: +SKIP ``` Alle zusätzlichen Parameter für Ihre Aufgabe können auch in die [`pipeline`] aufgenommen werden. Die Aufgabe `Text-Generierung` hat eine [`~generation.GenerationMixin.generate`]-Methode mit mehreren Parametern zur Steuerung der Ausgabe. Wenn Sie zum Beispiel mehr als eine Ausgabe erzeugen wollen, setzen Sie den Parameter `num_return_sequences`: ```py >>> generator( ... "Three Rings for the Elven-kings under the sky, Seven for the Dwarf-lords in their halls of stone", ... num_return_sequences=2, ... ) # doctest: +SKIP ``` ### Wählen Sie ein Modell und einen Tokenizer Die [`pipeline`] akzeptiert jedes Modell aus dem [Hub](https://huggingface.co/models). Auf dem Hub gibt es Tags, mit denen Sie nach einem Modell filtern können, das Sie für Ihre Aufgabe verwenden möchten. Sobald Sie ein passendes Modell ausgewählt haben, laden Sie es mit der entsprechenden `AutoModelFor` und [`AutoTokenizer`] Klasse. Laden Sie zum Beispiel die Klasse [`AutoModelForCausalLM`] für eine kausale Sprachmodellierungsaufgabe: ```py >>> from transformers import AutoTokenizer, AutoModelForCausalLM >>> tokenizer = AutoTokenizer.from_pretrained("distilbert/distilgpt2") >>> model = AutoModelForCausalLM.from_pretrained("distilbert/distilgpt2") ``` Erstellen Sie eine [`pipeline`] für Ihre Aufgabe, und geben Sie das Modell und den Tokenizer an, die Sie geladen haben: ```py >>> from transformers import pipeline >>> generator = pipeline(task="text-generation", model=model, tokenizer=tokenizer) ``` Übergeben Sie Ihren Eingabetext an die [`pipeline`] , um einen Text zu erzeugen: ```py >>> generator( ... "Three Rings for the Elven-kings under the sky, Seven for the Dwarf-lords in their halls of stone" ... ) # doctest: +SKIP [{'generated_text': 'Three Rings for the Elven-kings under the sky, Seven for the Dwarf-lords in their halls of stone, Seven for the Dragon-lords (for them to rule in a world ruled by their rulers, and all who live within the realm'}] ``` ## Audio-Pipeline Die [`pipeline`] unterstützt auch Audioaufgaben wie Audioklassifizierung und automatische Spracherkennung. Lassen Sie uns zum Beispiel die Emotion in diesem Audioclip klassifizieren: ```py >>> from datasets import load_dataset >>> import torch >>> torch.manual_seed(42) # doctest: +IGNORE_RESULT >>> ds = load_dataset("hf-internal-testing/librispeech_asr_demo", "clean", split="validation") >>> audio_file = ds[0]["audio"]["path"] ``` Finden Sie ein [Audioklassifikation](https://huggingface.co/models?pipeline_tag=audio-classification) Modell auf dem Model Hub für Emotionserkennung und laden Sie es in die [`pipeline`]: ```py >>> from transformers import pipeline >>> audio_classifier = pipeline( ... task="audio-classification", model="ehcalabres/wav2vec2-lg-xlsr-en-speech-emotion-recognition" ... ) ``` Übergeben Sie die Audiodatei an die [`pipeline`]: ```py >>> preds = audio_classifier(audio_file) >>> preds = [{"score": round(pred["score"], 4), "label": pred["label"]} for pred in preds] >>> preds [{'score': 0.1315, 'label': 'calm'}, {'score': 0.1307, 'label': 'neutral'}, {'score': 0.1274, 'label': 'sad'}, {'score': 0.1261, 'label': 'fearful'}, {'score': 0.1242, 'label': 'happy'}] ``` ## Bildverarbeitungs-Pipeline Die Verwendung einer [`pipeline`] für Bildverarbeitungsaufgaben ist praktisch identisch. Geben Sie Ihre Aufgabe an und übergeben Sie Ihr Bild an den Klassifikator. Das Bild kann ein Link oder ein lokaler Pfad zu dem Bild sein. Zum Beispiel: Welche Katzenart ist unten abgebildet? ![pipeline-cat-chonk](https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/pipeline-cat-chonk.jpeg) ```py >>> from transformers import pipeline >>> vision_classifier = pipeline(task="image-classification") >>> preds = vision_classifier( ... images="https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/pipeline-cat-chonk.jpeg" ... ) >>> preds = [{"score": round(pred["score"], 4), "label": pred["label"]} for pred in preds] >>> preds [{'score': 0.4335, 'label': 'lynx, catamount'}, {'score': 0.0348, 'label': 'cougar, puma, catamount, mountain lion, painter, panther, Felis concolor'}, {'score': 0.0324, 'label': 'snow leopard, ounce, Panthera uncia'}, {'score': 0.0239, 'label': 'Egyptian cat'}, {'score': 0.0229, 'label': 'tiger cat'}] ``` ## Multimodale Pipeline Die [`pipeline`] unterstützt mehr als eine Modalität. Eine Aufgabe zur Beantwortung visueller Fragen (VQA) kombiniert zum Beispiel Text und Bild. Verwenden Sie einen beliebigen Bildlink und eine Frage, die Sie zu dem Bild stellen möchten. Das Bild kann eine URL oder ein lokaler Pfad zu dem Bild sein. Wenn Sie zum Beispiel das gleiche Bild wie in der obigen Vision-Pipeline verwenden: ```py >>> image = "https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/pipeline-cat-chonk.jpeg" >>> question = "Where is the cat?" ``` Erstellen Sie eine Pipeline für "vqa" und übergeben Sie ihr das Bild und die Frage: ```py >>> from transformers import pipeline >>> vqa = pipeline(task="vqa") >>> preds = vqa(image=image, question=question) >>> preds = [{"score": round(pred["score"], 4), "answer": pred["answer"]} for pred in preds] >>> preds [{'score': 0.9112, 'answer': 'snow'}, {'score': 0.8796, 'answer': 'in snow'}, {'score': 0.6717, 'answer': 'outside'}, {'score': 0.0291, 'answer': 'on ground'}, {'score': 0.027, 'answer': 'ground'}] ```

transformers/docs/source/de/pipeline_tutorial.md/0

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3

# Load pretrained instances with an AutoClass With so many different Transformer architectures, it can be challenging to create one for your checkpoint. As a part of 🤗 Transformers core philosophy to make the library easy, simple and flexible to use, an `AutoClass` automatically infers and loads the correct architecture from a given checkpoint. The `from_pretrained()` method lets you quickly load a pretrained model for any architecture so you don't have to devote time and resources to train a model from scratch. Producing this type of checkpoint-agnostic code means if your code works for one checkpoint, it will work with another checkpoint - as long as it was trained for a similar task - even if the architecture is different. <Tip> Remember, architecture refers to the skeleton of the model and checkpoints are the weights for a given architecture. For example, [BERT](https://huggingface.co/google-bert/bert-base-uncased) is an architecture, while `google-bert/bert-base-uncased` is a checkpoint. Model is a general term that can mean either architecture or checkpoint. </Tip> In this tutorial, learn to: * Load a pretrained tokenizer. * Load a pretrained image processor * Load a pretrained feature extractor. * Load a pretrained processor. * Load a pretrained model. * Load a model as a backbone. ## AutoTokenizer Nearly every NLP task begins with a tokenizer. A tokenizer converts your input into a format that can be processed by the model. Load a tokenizer with [`AutoTokenizer.from_pretrained`]: ```py >>> from transformers import AutoTokenizer >>> tokenizer = AutoTokenizer.from_pretrained("google-bert/bert-base-uncased") ``` Then tokenize your input as shown below: ```py >>> sequence = "In a hole in the ground there lived a hobbit." >>> print(tokenizer(sequence)) {'input_ids': [101, 1999, 1037, 4920, 1999, 1996, 2598, 2045, 2973, 1037, 7570, 10322, 4183, 1012, 102], 'token_type_ids': [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0], 'attention_mask': [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]} ``` ## AutoImageProcessor For vision tasks, an image processor processes the image into the correct input format. ```py >>> from transformers import AutoImageProcessor >>> image_processor = AutoImageProcessor.from_pretrained("google/vit-base-patch16-224") ``` ## AutoBackbone <div style="text-align: center"> <img src="https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/transformers/Swin%20Stages.png"> <figcaption class="mt-2 text-center text-sm text-gray-500">A Swin backbone with multiple stages for outputting a feature map.</figcaption> </div> The [`AutoBackbone`] lets you use pretrained models as backbones to get feature maps from different stages of the backbone. You should specify one of the following parameters in [`~PretrainedConfig.from_pretrained`]: * `out_indices` is the index of the layer you'd like to get the feature map from * `out_features` is the name of the layer you'd like to get the feature map from These parameters can be used interchangeably, but if you use both, make sure they're aligned with each other! If you don't pass any of these parameters, the backbone returns the feature map from the last layer. <div style="text-align: center"> <img src="https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/transformers/Swin%20Stage%201.png"> <figcaption class="mt-2 text-center text-sm text-gray-500">A feature map from the first stage of the backbone. The patch partition refers to the model stem.</figcaption> </div> For example, in the above diagram, to return the feature map from the first stage of the Swin backbone, you can set `out_indices=(1,)`: ```py >>> from transformers import AutoImageProcessor, AutoBackbone >>> import torch >>> from PIL import Image >>> import requests >>> url = "http://images.cocodataset.org/val2017/000000039769.jpg" >>> image = Image.open(requests.get(url, stream=True).raw) >>> processor = AutoImageProcessor.from_pretrained("microsoft/swin-tiny-patch4-window7-224") >>> model = AutoBackbone.from_pretrained("microsoft/swin-tiny-patch4-window7-224", out_indices=(1,)) >>> inputs = processor(image, return_tensors="pt") >>> outputs = model(**inputs) >>> feature_maps = outputs.feature_maps ``` Now you can access the `feature_maps` object from the first stage of the backbone: ```py >>> list(feature_maps[0].shape) [1, 96, 56, 56] ``` ## AutoFeatureExtractor For audio tasks, a feature extractor processes the audio signal the correct input format. Load a feature extractor with [`AutoFeatureExtractor.from_pretrained`]: ```py >>> from transformers import AutoFeatureExtractor >>> feature_extractor = AutoFeatureExtractor.from_pretrained( ... "ehcalabres/wav2vec2-lg-xlsr-en-speech-emotion-recognition" ... ) ``` ## AutoProcessor Multimodal tasks require a processor that combines two types of preprocessing tools. For example, the [LayoutLMV2](model_doc/layoutlmv2) model requires an image processor to handle images and a tokenizer to handle text; a processor combines both of them. Load a processor with [`AutoProcessor.from_pretrained`]: ```py >>> from transformers import AutoProcessor >>> processor = AutoProcessor.from_pretrained("microsoft/layoutlmv2-base-uncased") ``` ## AutoModel <frameworkcontent> <pt> The `AutoModelFor` classes let you load a pretrained model for a given task (see [here](model_doc/auto) for a complete list of available tasks). For example, load a model for sequence classification with [`AutoModelForSequenceClassification.from_pretrained`]: ```py >>> from transformers import AutoModelForSequenceClassification >>> model = AutoModelForSequenceClassification.from_pretrained("distilbert/distilbert-base-uncased") ``` Easily reuse the same checkpoint to load an architecture for a different task: ```py >>> from transformers import AutoModelForTokenClassification >>> model = AutoModelForTokenClassification.from_pretrained("distilbert/distilbert-base-uncased") ``` <Tip warning={true}> For PyTorch models, the `from_pretrained()` method uses `torch.load()` which internally uses `pickle` and is known to be insecure. In general, never load a model that could have come from an untrusted source, or that could have been tampered with. This security risk is partially mitigated for public models hosted on the Hugging Face Hub, which are [scanned for malware](https://huggingface.co/docs/hub/security-malware) at each commit. See the [Hub documentation](https://huggingface.co/docs/hub/security) for best practices like [signed commit verification](https://huggingface.co/docs/hub/security-gpg#signing-commits-with-gpg) with GPG. TensorFlow and Flax checkpoints are not affected, and can be loaded within PyTorch architectures using the `from_tf` and `from_flax` kwargs for the `from_pretrained` method to circumvent this issue. </Tip> Generally, we recommend using the `AutoTokenizer` class and the `AutoModelFor` class to load pretrained instances of models. This will ensure you load the correct architecture every time. In the next [tutorial](preprocessing), learn how to use your newly loaded tokenizer, image processor, feature extractor and processor to preprocess a dataset for fine-tuning. </pt> <tf> Finally, the `TFAutoModelFor` classes let you load a pretrained model for a given task (see [here](model_doc/auto) for a complete list of available tasks). For example, load a model for sequence classification with [`TFAutoModelForSequenceClassification.from_pretrained`]: ```py >>> from transformers import TFAutoModelForSequenceClassification >>> model = TFAutoModelForSequenceClassification.from_pretrained("distilbert/distilbert-base-uncased") ``` Easily reuse the same checkpoint to load an architecture for a different task: ```py >>> from transformers import TFAutoModelForTokenClassification >>> model = TFAutoModelForTokenClassification.from_pretrained("distilbert/distilbert-base-uncased") ``` Generally, we recommend using the `AutoTokenizer` class and the `TFAutoModelFor` class to load pretrained instances of models. This will ensure you load the correct architecture every time. In the next [tutorial](preprocessing), learn how to use your newly loaded tokenizer, image processor, feature extractor and processor to preprocess a dataset for fine-tuning. </tf> </frameworkcontent>

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# Backbone A backbone is a model used for feature extraction for higher level computer vision tasks such as object detection and image classification. Transformers provides an [`AutoBackbone`] class for initializing a Transformers backbone from pretrained model weights, and two utility classes: * [`~utils.BackboneMixin`] enables initializing a backbone from Transformers or [timm](https://hf.co/docs/timm/index) and includes functions for returning the output features and indices. * [`~utils.BackboneConfigMixin`] sets the output features and indices of the backbone configuration. [timm](https://hf.co/docs/timm/index) models are loaded with the [`TimmBackbone`] and [`TimmBackboneConfig`] classes. Backbones are supported for the following models: * [BEiT](..model_doc/beit) * [BiT](../model_doc/bit) * [ConvNet](../model_doc/convnext) * [ConvNextV2](../model_doc/convnextv2) * [DiNAT](..model_doc/dinat) * [DINOV2](../model_doc/dinov2) * [FocalNet](../model_doc/focalnet) * [MaskFormer](../model_doc/maskformer) * [NAT](../model_doc/nat) * [ResNet](../model_doc/resnet) * [Swin Transformer](../model_doc/swin) * [Swin Transformer v2](../model_doc/swinv2) * [ViTDet](../model_doc/vitdet) ## AutoBackbone [[autodoc]] AutoBackbone ## BackboneMixin [[autodoc]] utils.BackboneMixin ## BackboneConfigMixin [[autodoc]] utils.BackboneConfigMixin ## TimmBackbone [[autodoc]] models.timm_backbone.TimmBackbone ## TimmBackboneConfig [[autodoc]] models.timm_backbone.TimmBackboneConfig

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# Generation Each framework has a generate method for text generation implemented in their respective `GenerationMixin` class: - PyTorch [`~generation.GenerationMixin.generate`] is implemented in [`~generation.GenerationMixin`]. - TensorFlow [`~generation.TFGenerationMixin.generate`] is implemented in [`~generation.TFGenerationMixin`]. - Flax/JAX [`~generation.FlaxGenerationMixin.generate`] is implemented in [`~generation.FlaxGenerationMixin`]. Regardless of your framework of choice, you can parameterize the generate method with a [`~generation.GenerationConfig`] class instance. Please refer to this class for the complete list of generation parameters, which control the behavior of the generation method. To learn how to inspect a model's generation configuration, what are the defaults, how to change the parameters ad hoc, and how to create and save a customized generation configuration, refer to the [text generation strategies guide](../generation_strategies). The guide also explains how to use related features, like token streaming. ## GenerationConfig [[autodoc]] generation.GenerationConfig - from_pretrained - from_model_config - save_pretrained ## GenerationMixin [[autodoc]] generation.GenerationMixin - generate - compute_transition_scores - greedy_search - sample - beam_search - beam_sample - contrastive_search - group_beam_search - constrained_beam_search ## TFGenerationMixin [[autodoc]] generation.TFGenerationMixin - generate - compute_transition_scores ## FlaxGenerationMixin [[autodoc]] generation.FlaxGenerationMixin - generate

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# BERT <div class="flex flex-wrap space-x-1"> <a href="https://huggingface.co/models?filter=bert"> <img alt="Models" src="https://img.shields.io/badge/All_model_pages-bert-blueviolet"> </a> <a href="https://huggingface.co/spaces/docs-demos/bert-base-uncased"> <img alt="Spaces" src="https://img.shields.io/badge/%F0%9F%A4%97%20Hugging%20Face-Spaces-blue"> </a> </div> ## Overview The BERT model was proposed in [BERT: Pre-training of Deep Bidirectional Transformers for Language Understanding](https://arxiv.org/abs/1810.04805) by Jacob Devlin, Ming-Wei Chang, Kenton Lee and Kristina Toutanova. It's a bidirectional transformer pretrained using a combination of masked language modeling objective and next sentence prediction on a large corpus comprising the Toronto Book Corpus and Wikipedia. The abstract from the paper is the following: *We introduce a new language representation model called BERT, which stands for Bidirectional Encoder Representations from Transformers. Unlike recent language representation models, BERT is designed to pre-train deep bidirectional representations from unlabeled text by jointly conditioning on both left and right context in all layers. As a result, the pre-trained BERT model can be fine-tuned with just one additional output layer to create state-of-the-art models for a wide range of tasks, such as question answering and language inference, without substantial task-specific architecture modifications.* *BERT is conceptually simple and empirically powerful. It obtains new state-of-the-art results on eleven natural language processing tasks, including pushing the GLUE score to 80.5% (7.7% point absolute improvement), MultiNLI accuracy to 86.7% (4.6% absolute improvement), SQuAD v1.1 question answering Test F1 to 93.2 (1.5 point absolute improvement) and SQuAD v2.0 Test F1 to 83.1 (5.1 point absolute improvement).* This model was contributed by [thomwolf](https://huggingface.co/thomwolf). The original code can be found [here](https://github.com/google-research/bert). ## Usage tips - BERT is a model with absolute position embeddings so it's usually advised to pad the inputs on the right rather than the left. - BERT was trained with the masked language modeling (MLM) and next sentence prediction (NSP) objectives. It is efficient at predicting masked tokens and at NLU in general, but is not optimal for text generation. - Corrupts the inputs by using random masking, more precisely, during pretraining, a given percentage of tokens (usually 15%) is masked by: * a special mask token with probability 0.8 * a random token different from the one masked with probability 0.1 * the same token with probability 0.1 - The model must predict the original sentence, but has a second objective: inputs are two sentences A and B (with a separation token in between). With probability 50%, the sentences are consecutive in the corpus, in the remaining 50% they are not related. The model has to predict if the sentences are consecutive or not. ## Resources A list of official Hugging Face and community (indicated by 🌎) resources to help you get started with BERT. If you're interested in submitting a resource to be included here, please feel free to open a Pull Request and we'll review it! The resource should ideally demonstrate something new instead of duplicating an existing resource. <PipelineTag pipeline="text-classification"/> - A blog post on [BERT Text Classification in a different language](https://www.philschmid.de/bert-text-classification-in-a-different-language). - A notebook for [Finetuning BERT (and friends) for multi-label text classification](https://colab.research.google.com/github/NielsRogge/Transformers-Tutorials/blob/master/BERT/Fine_tuning_BERT_(and_friends)_for_multi_label_text_classification.ipynb). - A notebook on how to [Finetune BERT for multi-label classification using PyTorch](https://colab.research.google.com/github/abhimishra91/transformers-tutorials/blob/master/transformers_multi_label_classification.ipynb). 🌎 - A notebook on how to [warm-start an EncoderDecoder model with BERT for summarization](https://colab.research.google.com/github/patrickvonplaten/notebooks/blob/master/BERT2BERT_for_CNN_Dailymail.ipynb). - [`BertForSequenceClassification`] is supported by this [example script](https://github.com/huggingface/transformers/tree/main/examples/pytorch/text-classification) and [notebook](https://colab.research.google.com/github/huggingface/notebooks/blob/main/examples/text_classification.ipynb). - [`TFBertForSequenceClassification`] is supported by this [example script](https://github.com/huggingface/transformers/tree/main/examples/tensorflow/text-classification) and [notebook](https://colab.research.google.com/github/huggingface/notebooks/blob/main/examples/text_classification-tf.ipynb). - [`FlaxBertForSequenceClassification`] is supported by this [example script](https://github.com/huggingface/transformers/tree/main/examples/flax/text-classification) and [notebook](https://colab.research.google.com/github/huggingface/notebooks/blob/main/examples/text_classification_flax.ipynb). - [Text classification task guide](../tasks/sequence_classification) <PipelineTag pipeline="token-classification"/> - A blog post on how to use [Hugging Face Transformers with Keras: Fine-tune a non-English BERT for Named Entity Recognition](https://www.philschmid.de/huggingface-transformers-keras-tf). - A notebook for [Finetuning BERT for named-entity recognition](https://colab.research.google.com/github/NielsRogge/Transformers-Tutorials/blob/master/Custom_Named_Entity_Recognition_with_BERT_only_first_wordpiece.ipynb) using only the first wordpiece of each word in the word label during tokenization. To propagate the label of the word to all wordpieces, see this [version](https://github.com/NielsRogge/Transformers-Tutorials/blob/master/BERT/Custom_Named_Entity_Recognition_with_BERT.ipynb) of the notebook instead. - [`BertForTokenClassification`] is supported by this [example script](https://github.com/huggingface/transformers/tree/main/examples/pytorch/token-classification) and [notebook](https://colab.research.google.com/github/huggingface/notebooks/blob/main/examples/token_classification.ipynb). - [`TFBertForTokenClassification`] is supported by this [example script](https://github.com/huggingface/transformers/tree/main/examples/tensorflow/token-classification) and [notebook](https://colab.research.google.com/github/huggingface/notebooks/blob/main/examples/token_classification-tf.ipynb). - [`FlaxBertForTokenClassification`] is supported by this [example script](https://github.com/huggingface/transformers/tree/main/examples/flax/token-classification). - [Token classification](https://huggingface.co/course/chapter7/2?fw=pt) chapter of the 🤗 Hugging Face Course. - [Token classification task guide](../tasks/token_classification) <PipelineTag pipeline="fill-mask"/> - [`BertForMaskedLM`] is supported by this [example script](https://github.com/huggingface/transformers/tree/main/examples/pytorch/language-modeling#robertabertdistilbert-and-masked-language-modeling) and [notebook](https://colab.research.google.com/github/huggingface/notebooks/blob/main/examples/language_modeling.ipynb). - [`TFBertForMaskedLM`] is supported by this [example script](https://github.com/huggingface/transformers/tree/main/examples/tensorflow/language-modeling#run_mlmpy) and [notebook](https://colab.research.google.com/github/huggingface/notebooks/blob/main/examples/language_modeling-tf.ipynb). - [`FlaxBertForMaskedLM`] is supported by this [example script](https://github.com/huggingface/transformers/tree/main/examples/flax/language-modeling#masked-language-modeling) and [notebook](https://colab.research.google.com/github/huggingface/notebooks/blob/main/examples/masked_language_modeling_flax.ipynb). - [Masked language modeling](https://huggingface.co/course/chapter7/3?fw=pt) chapter of the 🤗 Hugging Face Course. - [Masked language modeling task guide](../tasks/masked_language_modeling) <PipelineTag pipeline="question-answering"/> - [`BertForQuestionAnswering`] is supported by this [example script](https://github.com/huggingface/transformers/tree/main/examples/pytorch/question-answering) and [notebook](https://colab.research.google.com/github/huggingface/notebooks/blob/main/examples/question_answering.ipynb). - [`TFBertForQuestionAnswering`] is supported by this [example script](https://github.com/huggingface/transformers/tree/main/examples/tensorflow/question-answering) and [notebook](https://colab.research.google.com/github/huggingface/notebooks/blob/main/examples/question_answering-tf.ipynb). - [`FlaxBertForQuestionAnswering`] is supported by this [example script](https://github.com/huggingface/transformers/tree/main/examples/flax/question-answering). - [Question answering](https://huggingface.co/course/chapter7/7?fw=pt) chapter of the 🤗 Hugging Face Course. - [Question answering task guide](../tasks/question_answering) **Multiple choice** - [`BertForMultipleChoice`] is supported by this [example script](https://github.com/huggingface/transformers/tree/main/examples/pytorch/multiple-choice) and [notebook](https://colab.research.google.com/github/huggingface/notebooks/blob/main/examples/multiple_choice.ipynb). - [`TFBertForMultipleChoice`] is supported by this [example script](https://github.com/huggingface/transformers/tree/main/examples/tensorflow/multiple-choice) and [notebook](https://colab.research.google.com/github/huggingface/notebooks/blob/main/examples/multiple_choice-tf.ipynb). - [Multiple choice task guide](../tasks/multiple_choice) ⚡️ **Inference** - A blog post on how to [Accelerate BERT inference with Hugging Face Transformers and AWS Inferentia](https://huggingface.co/blog/bert-inferentia-sagemaker). - A blog post on how to [Accelerate BERT inference with DeepSpeed-Inference on GPUs](https://www.philschmid.de/bert-deepspeed-inference). ⚙️ **Pretraining** - A blog post on [Pre-Training BERT with Hugging Face Transformers and Habana Gaudi](https://www.philschmid.de/pre-training-bert-habana). 🚀 **Deploy** - A blog post on how to [Convert Transformers to ONNX with Hugging Face Optimum](https://www.philschmid.de/convert-transformers-to-onnx). - A blog post on how to [Setup Deep Learning environment for Hugging Face Transformers with Habana Gaudi on AWS](https://www.philschmid.de/getting-started-habana-gaudi#conclusion). - A blog post on [Autoscaling BERT with Hugging Face Transformers, Amazon SageMaker and Terraform module](https://www.philschmid.de/terraform-huggingface-amazon-sagemaker-advanced). - A blog post on [Serverless BERT with HuggingFace, AWS Lambda, and Docker](https://www.philschmid.de/serverless-bert-with-huggingface-aws-lambda-docker). - A blog post on [Hugging Face Transformers BERT fine-tuning using Amazon SageMaker and Training Compiler](https://www.philschmid.de/huggingface-amazon-sagemaker-training-compiler). - A blog post on [Task-specific knowledge distillation for BERT using Transformers & Amazon SageMaker](https://www.philschmid.de/knowledge-distillation-bert-transformers). ## BertConfig [[autodoc]] BertConfig - all ## BertTokenizer [[autodoc]] BertTokenizer - build_inputs_with_special_tokens - get_special_tokens_mask - create_token_type_ids_from_sequences - save_vocabulary <frameworkcontent> <pt> ## BertTokenizerFast [[autodoc]] BertTokenizerFast </pt> <tf> ## TFBertTokenizer [[autodoc]] TFBertTokenizer </tf> </frameworkcontent> ## Bert specific outputs [[autodoc]] models.bert.modeling_bert.BertForPreTrainingOutput [[autodoc]] models.bert.modeling_tf_bert.TFBertForPreTrainingOutput [[autodoc]] models.bert.modeling_flax_bert.FlaxBertForPreTrainingOutput <frameworkcontent> <pt> ## BertModel [[autodoc]] BertModel - forward ## BertForPreTraining [[autodoc]] BertForPreTraining - forward ## BertLMHeadModel [[autodoc]] BertLMHeadModel - forward ## BertForMaskedLM [[autodoc]] BertForMaskedLM - forward ## BertForNextSentencePrediction [[autodoc]] BertForNextSentencePrediction - forward ## BertForSequenceClassification [[autodoc]] BertForSequenceClassification - forward ## BertForMultipleChoice [[autodoc]] BertForMultipleChoice - forward ## BertForTokenClassification [[autodoc]] BertForTokenClassification - forward ## BertForQuestionAnswering [[autodoc]] BertForQuestionAnswering - forward </pt> <tf> ## TFBertModel [[autodoc]] TFBertModel - call ## TFBertForPreTraining [[autodoc]] TFBertForPreTraining - call ## TFBertModelLMHeadModel [[autodoc]] TFBertLMHeadModel - call ## TFBertForMaskedLM [[autodoc]] TFBertForMaskedLM - call ## TFBertForNextSentencePrediction [[autodoc]] TFBertForNextSentencePrediction - call ## TFBertForSequenceClassification [[autodoc]] TFBertForSequenceClassification - call ## TFBertForMultipleChoice [[autodoc]] TFBertForMultipleChoice - call ## TFBertForTokenClassification [[autodoc]] TFBertForTokenClassification - call ## TFBertForQuestionAnswering [[autodoc]] TFBertForQuestionAnswering - call </tf> <jax> ## FlaxBertModel [[autodoc]] FlaxBertModel - __call__ ## FlaxBertForPreTraining [[autodoc]] FlaxBertForPreTraining - __call__ ## FlaxBertForCausalLM [[autodoc]] FlaxBertForCausalLM - __call__ ## FlaxBertForMaskedLM [[autodoc]] FlaxBertForMaskedLM - __call__ ## FlaxBertForNextSentencePrediction [[autodoc]] FlaxBertForNextSentencePrediction - __call__ ## FlaxBertForSequenceClassification [[autodoc]] FlaxBertForSequenceClassification - __call__ ## FlaxBertForMultipleChoice [[autodoc]] FlaxBertForMultipleChoice - __call__ ## FlaxBertForTokenClassification [[autodoc]] FlaxBertForTokenClassification - __call__ ## FlaxBertForQuestionAnswering [[autodoc]] FlaxBertForQuestionAnswering - __call__ </jax> </frameworkcontent>

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# CANINE ## Overview The CANINE model was proposed in [CANINE: Pre-training an Efficient Tokenization-Free Encoder for Language Representation](https://arxiv.org/abs/2103.06874) by Jonathan H. Clark, Dan Garrette, Iulia Turc, John Wieting. It's among the first papers that trains a Transformer without using an explicit tokenization step (such as Byte Pair Encoding (BPE), WordPiece or SentencePiece). Instead, the model is trained directly at a Unicode character-level. Training at a character-level inevitably comes with a longer sequence length, which CANINE solves with an efficient downsampling strategy, before applying a deep Transformer encoder. The abstract from the paper is the following: *Pipelined NLP systems have largely been superseded by end-to-end neural modeling, yet nearly all commonly-used models still require an explicit tokenization step. While recent tokenization approaches based on data-derived subword lexicons are less brittle than manually engineered tokenizers, these techniques are not equally suited to all languages, and the use of any fixed vocabulary may limit a model's ability to adapt. In this paper, we present CANINE, a neural encoder that operates directly on character sequences, without explicit tokenization or vocabulary, and a pre-training strategy that operates either directly on characters or optionally uses subwords as a soft inductive bias. To use its finer-grained input effectively and efficiently, CANINE combines downsampling, which reduces the input sequence length, with a deep transformer stack, which encodes context. CANINE outperforms a comparable mBERT model by 2.8 F1 on TyDi QA, a challenging multilingual benchmark, despite having 28% fewer model parameters.* This model was contributed by [nielsr](https://huggingface.co/nielsr). The original code can be found [here](https://github.com/google-research/language/tree/master/language/canine). ## Usage tips - CANINE uses no less than 3 Transformer encoders internally: 2 "shallow" encoders (which only consist of a single layer) and 1 "deep" encoder (which is a regular BERT encoder). First, a "shallow" encoder is used to contextualize the character embeddings, using local attention. Next, after downsampling, a "deep" encoder is applied. Finally, after upsampling, a "shallow" encoder is used to create the final character embeddings. Details regarding up- and downsampling can be found in the paper. - CANINE uses a max sequence length of 2048 characters by default. One can use [`CanineTokenizer`] to prepare text for the model. - Classification can be done by placing a linear layer on top of the final hidden state of the special [CLS] token (which has a predefined Unicode code point). For token classification tasks however, the downsampled sequence of tokens needs to be upsampled again to match the length of the original character sequence (which is 2048). The details for this can be found in the paper. Model checkpoints: - [google/canine-c](https://huggingface.co/google/canine-c): Pre-trained with autoregressive character loss, 12-layer, 768-hidden, 12-heads, 121M parameters (size ~500 MB). - [google/canine-s](https://huggingface.co/google/canine-s): Pre-trained with subword loss, 12-layer, 768-hidden, 12-heads, 121M parameters (size ~500 MB). ## Usage example CANINE works on raw characters, so it can be used **without a tokenizer**: ```python >>> from transformers import CanineModel >>> import torch >>> model = CanineModel.from_pretrained("google/canine-c") # model pre-trained with autoregressive character loss >>> text = "hello world" >>> # use Python's built-in ord() function to turn each character into its unicode code point id >>> input_ids = torch.tensor([[ord(char) for char in text]]) >>> outputs = model(input_ids) # forward pass >>> pooled_output = outputs.pooler_output >>> sequence_output = outputs.last_hidden_state ``` For batched inference and training, it is however recommended to make use of the tokenizer (to pad/truncate all sequences to the same length): ```python >>> from transformers import CanineTokenizer, CanineModel >>> model = CanineModel.from_pretrained("google/canine-c") >>> tokenizer = CanineTokenizer.from_pretrained("google/canine-c") >>> inputs = ["Life is like a box of chocolates.", "You never know what you gonna get."] >>> encoding = tokenizer(inputs, padding="longest", truncation=True, return_tensors="pt") >>> outputs = model(**encoding) # forward pass >>> pooled_output = outputs.pooler_output >>> sequence_output = outputs.last_hidden_state ``` ## Resources - [Text classification task guide](../tasks/sequence_classification) - [Token classification task guide](../tasks/token_classification) - [Question answering task guide](../tasks/question_answering) - [Multiple choice task guide](../tasks/multiple_choice) ## CanineConfig [[autodoc]] CanineConfig ## CanineTokenizer [[autodoc]] CanineTokenizer - build_inputs_with_special_tokens - get_special_tokens_mask - create_token_type_ids_from_sequences ## CANINE specific outputs [[autodoc]] models.canine.modeling_canine.CanineModelOutputWithPooling ## CanineModel [[autodoc]] CanineModel - forward ## CanineForSequenceClassification [[autodoc]] CanineForSequenceClassification - forward ## CanineForMultipleChoice [[autodoc]] CanineForMultipleChoice - forward ## CanineForTokenClassification [[autodoc]] CanineForTokenClassification - forward ## CanineForQuestionAnswering [[autodoc]] CanineForQuestionAnswering - forward

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# Data2Vec ## Overview The Data2Vec model was proposed in [data2vec: A General Framework for Self-supervised Learning in Speech, Vision and Language](https://arxiv.org/pdf/2202.03555) by Alexei Baevski, Wei-Ning Hsu, Qiantong Xu, Arun Babu, Jiatao Gu and Michael Auli. Data2Vec proposes a unified framework for self-supervised learning across different data modalities - text, audio and images. Importantly, predicted targets for pre-training are contextualized latent representations of the inputs, rather than modality-specific, context-independent targets. The abstract from the paper is the following: *While the general idea of self-supervised learning is identical across modalities, the actual algorithms and objectives differ widely because they were developed with a single modality in mind. To get us closer to general self-supervised learning, we present data2vec, a framework that uses the same learning method for either speech, NLP or computer vision. The core idea is to predict latent representations of the full input data based on a masked view of the input in a selfdistillation setup using a standard Transformer architecture. Instead of predicting modality-specific targets such as words, visual tokens or units of human speech which are local in nature, data2vec predicts contextualized latent representations that contain information from the entire input. Experiments on the major benchmarks of speech recognition, image classification, and natural language understanding demonstrate a new state of the art or competitive performance to predominant approaches. Models and code are available at www.github.com/pytorch/fairseq/tree/master/examples/data2vec.* This model was contributed by [edugp](https://huggingface.co/edugp) and [patrickvonplaten](https://huggingface.co/patrickvonplaten). [sayakpaul](https://github.com/sayakpaul) and [Rocketknight1](https://github.com/Rocketknight1) contributed Data2Vec for vision in TensorFlow. The original code (for NLP and Speech) can be found [here](https://github.com/pytorch/fairseq/tree/main/examples/data2vec). The original code for vision can be found [here](https://github.com/facebookresearch/data2vec_vision/tree/main/beit). ## Usage tips - Data2VecAudio, Data2VecText, and Data2VecVision have all been trained using the same self-supervised learning method. - For Data2VecAudio, preprocessing is identical to [`Wav2Vec2Model`], including feature extraction - For Data2VecText, preprocessing is identical to [`RobertaModel`], including tokenization. - For Data2VecVision, preprocessing is identical to [`BeitModel`], including feature extraction. ## Resources A list of official Hugging Face and community (indicated by 🌎) resources to help you get started with Data2Vec. <PipelineTag pipeline="image-classification"/> - [`Data2VecVisionForImageClassification`] is supported by this [example script](https://github.com/huggingface/transformers/tree/main/examples/pytorch/image-classification) and [notebook](https://colab.research.google.com/github/huggingface/notebooks/blob/main/examples/image_classification.ipynb). - To fine-tune [`TFData2VecVisionForImageClassification`] on a custom dataset, see [this notebook](https://colab.research.google.com/github/sayakpaul/TF-2.0-Hacks/blob/master/data2vec_vision_image_classification.ipynb). **Data2VecText documentation resources** - [Text classification task guide](../tasks/sequence_classification) - [Token classification task guide](../tasks/token_classification) - [Question answering task guide](../tasks/question_answering) - [Causal language modeling task guide](../tasks/language_modeling) - [Masked language modeling task guide](../tasks/masked_language_modeling) - [Multiple choice task guide](../tasks/multiple_choice) **Data2VecAudio documentation resources** - [Audio classification task guide](../tasks/audio_classification) - [Automatic speech recognition task guide](../tasks/asr) **Data2VecVision documentation resources** - [Image classification](../tasks/image_classification) - [Semantic segmentation](../tasks/semantic_segmentation) If you're interested in submitting a resource to be included here, please feel free to open a Pull Request and we'll review it! The resource should ideally demonstrate something new instead of duplicating an existing resource. ## Data2VecTextConfig [[autodoc]] Data2VecTextConfig ## Data2VecAudioConfig [[autodoc]] Data2VecAudioConfig ## Data2VecVisionConfig [[autodoc]] Data2VecVisionConfig <frameworkcontent> <pt> ## Data2VecAudioModel [[autodoc]] Data2VecAudioModel - forward ## Data2VecAudioForAudioFrameClassification [[autodoc]] Data2VecAudioForAudioFrameClassification - forward ## Data2VecAudioForCTC [[autodoc]] Data2VecAudioForCTC - forward ## Data2VecAudioForSequenceClassification [[autodoc]] Data2VecAudioForSequenceClassification - forward ## Data2VecAudioForXVector [[autodoc]] Data2VecAudioForXVector - forward ## Data2VecTextModel [[autodoc]] Data2VecTextModel - forward ## Data2VecTextForCausalLM [[autodoc]] Data2VecTextForCausalLM - forward ## Data2VecTextForMaskedLM [[autodoc]] Data2VecTextForMaskedLM - forward ## Data2VecTextForSequenceClassification [[autodoc]] Data2VecTextForSequenceClassification - forward ## Data2VecTextForMultipleChoice [[autodoc]] Data2VecTextForMultipleChoice - forward ## Data2VecTextForTokenClassification [[autodoc]] Data2VecTextForTokenClassification - forward ## Data2VecTextForQuestionAnswering [[autodoc]] Data2VecTextForQuestionAnswering - forward ## Data2VecVisionModel [[autodoc]] Data2VecVisionModel - forward ## Data2VecVisionForImageClassification [[autodoc]] Data2VecVisionForImageClassification - forward ## Data2VecVisionForSemanticSegmentation [[autodoc]] Data2VecVisionForSemanticSegmentation - forward </pt> <tf> ## TFData2VecVisionModel [[autodoc]] TFData2VecVisionModel - call ## TFData2VecVisionForImageClassification [[autodoc]] TFData2VecVisionForImageClassification - call ## TFData2VecVisionForSemanticSegmentation [[autodoc]] TFData2VecVisionForSemanticSegmentation - call </tf> </frameworkcontent>

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# DPR <div class="flex flex-wrap space-x-1"> <a href="https://huggingface.co/models?filter=dpr"> <img alt="Models" src="https://img.shields.io/badge/All_model_pages-dpr-blueviolet"> </a> <a href="https://huggingface.co/spaces/docs-demos/dpr-question_encoder-bert-base-multilingual"> <img alt="Spaces" src="https://img.shields.io/badge/%F0%9F%A4%97%20Hugging%20Face-Spaces-blue"> </a> </div> ## Overview Dense Passage Retrieval (DPR) is a set of tools and models for state-of-the-art open-domain Q&A research. It was introduced in [Dense Passage Retrieval for Open-Domain Question Answering](https://arxiv.org/abs/2004.04906) by Vladimir Karpukhin, Barlas Oğuz, Sewon Min, Patrick Lewis, Ledell Wu, Sergey Edunov, Danqi Chen, Wen-tau Yih. The abstract from the paper is the following: *Open-domain question answering relies on efficient passage retrieval to select candidate contexts, where traditional sparse vector space models, such as TF-IDF or BM25, are the de facto method. In this work, we show that retrieval can be practically implemented using dense representations alone, where embeddings are learned from a small number of questions and passages by a simple dual-encoder framework. When evaluated on a wide range of open-domain QA datasets, our dense retriever outperforms a strong Lucene-BM25 system largely by 9%-19% absolute in terms of top-20 passage retrieval accuracy, and helps our end-to-end QA system establish new state-of-the-art on multiple open-domain QA benchmarks.* This model was contributed by [lhoestq](https://huggingface.co/lhoestq). The original code can be found [here](https://github.com/facebookresearch/DPR). ## Usage tips - DPR consists in three models: * Question encoder: encode questions as vectors * Context encoder: encode contexts as vectors * Reader: extract the answer of the questions inside retrieved contexts, along with a relevance score (high if the inferred span actually answers the question). ## DPRConfig [[autodoc]] DPRConfig ## DPRContextEncoderTokenizer [[autodoc]] DPRContextEncoderTokenizer ## DPRContextEncoderTokenizerFast [[autodoc]] DPRContextEncoderTokenizerFast ## DPRQuestionEncoderTokenizer [[autodoc]] DPRQuestionEncoderTokenizer ## DPRQuestionEncoderTokenizerFast [[autodoc]] DPRQuestionEncoderTokenizerFast ## DPRReaderTokenizer [[autodoc]] DPRReaderTokenizer ## DPRReaderTokenizerFast [[autodoc]] DPRReaderTokenizerFast ## DPR specific outputs [[autodoc]] models.dpr.modeling_dpr.DPRContextEncoderOutput [[autodoc]] models.dpr.modeling_dpr.DPRQuestionEncoderOutput [[autodoc]] models.dpr.modeling_dpr.DPRReaderOutput <frameworkcontent> <pt> ## DPRContextEncoder [[autodoc]] DPRContextEncoder - forward ## DPRQuestionEncoder [[autodoc]] DPRQuestionEncoder - forward ## DPRReader [[autodoc]] DPRReader - forward </pt> <tf> ## TFDPRContextEncoder [[autodoc]] TFDPRContextEncoder - call ## TFDPRQuestionEncoder [[autodoc]] TFDPRQuestionEncoder - call ## TFDPRReader [[autodoc]] TFDPRReader - call </tf> </frameworkcontent>

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# FNet ## Overview The FNet model was proposed in [FNet: Mixing Tokens with Fourier Transforms](https://arxiv.org/abs/2105.03824) by James Lee-Thorp, Joshua Ainslie, Ilya Eckstein, Santiago Ontanon. The model replaces the self-attention layer in a BERT model with a fourier transform which returns only the real parts of the transform. The model is significantly faster than the BERT model because it has fewer parameters and is more memory efficient. The model achieves about 92-97% accuracy of BERT counterparts on GLUE benchmark, and trains much faster than the BERT model. The abstract from the paper is the following: *We show that Transformer encoder architectures can be sped up, with limited accuracy costs, by replacing the self-attention sublayers with simple linear transformations that "mix" input tokens. These linear mixers, along with standard nonlinearities in feed-forward layers, prove competent at modeling semantic relationships in several text classification tasks. Most surprisingly, we find that replacing the self-attention sublayer in a Transformer encoder with a standard, unparameterized Fourier Transform achieves 92-97% of the accuracy of BERT counterparts on the GLUE benchmark, but trains 80% faster on GPUs and 70% faster on TPUs at standard 512 input lengths. At longer input lengths, our FNet model is significantly faster: when compared to the "efficient" Transformers on the Long Range Arena benchmark, FNet matches the accuracy of the most accurate models, while outpacing the fastest models across all sequence lengths on GPUs (and across relatively shorter lengths on TPUs). Finally, FNet has a light memory footprint and is particularly efficient at smaller model sizes; for a fixed speed and accuracy budget, small FNet models outperform Transformer counterparts.* This model was contributed by [gchhablani](https://huggingface.co/gchhablani). The original code can be found [here](https://github.com/google-research/google-research/tree/master/f_net). ## Usage tips The model was trained without an attention mask as it is based on Fourier Transform. The model was trained with maximum sequence length 512 which includes pad tokens. Hence, it is highly recommended to use the same maximum sequence length for fine-tuning and inference. ## Resources - [Text classification task guide](../tasks/sequence_classification) - [Token classification task guide](../tasks/token_classification) - [Question answering task guide](../tasks/question_answering) - [Masked language modeling task guide](../tasks/masked_language_modeling) - [Multiple choice task guide](../tasks/multiple_choice) ## FNetConfig [[autodoc]] FNetConfig ## FNetTokenizer [[autodoc]] FNetTokenizer - build_inputs_with_special_tokens - get_special_tokens_mask - create_token_type_ids_from_sequences - save_vocabulary ## FNetTokenizerFast [[autodoc]] FNetTokenizerFast ## FNetModel [[autodoc]] FNetModel - forward ## FNetForPreTraining [[autodoc]] FNetForPreTraining - forward ## FNetForMaskedLM [[autodoc]] FNetForMaskedLM - forward ## FNetForNextSentencePrediction [[autodoc]] FNetForNextSentencePrediction - forward ## FNetForSequenceClassification [[autodoc]] FNetForSequenceClassification - forward ## FNetForMultipleChoice [[autodoc]] FNetForMultipleChoice - forward ## FNetForTokenClassification [[autodoc]] FNetForTokenClassification - forward ## FNetForQuestionAnswering [[autodoc]] FNetForQuestionAnswering - forward

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# LeViT ## Overview The LeViT model was proposed in [LeViT: Introducing Convolutions to Vision Transformers](https://arxiv.org/abs/2104.01136) by Ben Graham, Alaaeldin El-Nouby, Hugo Touvron, Pierre Stock, Armand Joulin, Hervé Jégou, Matthijs Douze. LeViT improves the [Vision Transformer (ViT)](vit) in performance and efficiency by a few architectural differences such as activation maps with decreasing resolutions in Transformers and the introduction of an attention bias to integrate positional information. The abstract from the paper is the following: *We design a family of image classification architectures that optimize the trade-off between accuracy and efficiency in a high-speed regime. Our work exploits recent findings in attention-based architectures, which are competitive on highly parallel processing hardware. We revisit principles from the extensive literature on convolutional neural networks to apply them to transformers, in particular activation maps with decreasing resolutions. We also introduce the attention bias, a new way to integrate positional information in vision transformers. As a result, we propose LeVIT: a hybrid neural network for fast inference image classification. We consider different measures of efficiency on different hardware platforms, so as to best reflect a wide range of application scenarios. Our extensive experiments empirically validate our technical choices and show they are suitable to most architectures. Overall, LeViT significantly outperforms existing convnets and vision transformers with respect to the speed/accuracy tradeoff. For example, at 80% ImageNet top-1 accuracy, LeViT is 5 times faster than EfficientNet on CPU. * <img src="https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/levit_architecture.png" alt="drawing" width="600"/> <small> LeViT Architecture. Taken from the <a href="https://arxiv.org/abs/2104.01136">original paper</a>.</small> This model was contributed by [anugunj](https://huggingface.co/anugunj). The original code can be found [here](https://github.com/facebookresearch/LeViT). ## Usage tips - Compared to ViT, LeViT models use an additional distillation head to effectively learn from a teacher (which, in the LeViT paper, is a ResNet like-model). The distillation head is learned through backpropagation under supervision of a ResNet like-model. They also draw inspiration from convolution neural networks to use activation maps with decreasing resolutions to increase the efficiency. - There are 2 ways to fine-tune distilled models, either (1) in a classic way, by only placing a prediction head on top of the final hidden state and not using the distillation head, or (2) by placing both a prediction head and distillation head on top of the final hidden state. In that case, the prediction head is trained using regular cross-entropy between the prediction of the head and the ground-truth label, while the distillation prediction head is trained using hard distillation (cross-entropy between the prediction of the distillation head and the label predicted by the teacher). At inference time, one takes the average prediction between both heads as final prediction. (2) is also called "fine-tuning with distillation", because one relies on a teacher that has already been fine-tuned on the downstream dataset. In terms of models, (1) corresponds to [`LevitForImageClassification`] and (2) corresponds to [`LevitForImageClassificationWithTeacher`]. - All released checkpoints were pre-trained and fine-tuned on [ImageNet-1k](https://huggingface.co/datasets/imagenet-1k) (also referred to as ILSVRC 2012, a collection of 1.3 million images and 1,000 classes). only. No external data was used. This is in contrast with the original ViT model, which used external data like the JFT-300M dataset/Imagenet-21k for pre-training. - The authors of LeViT released 5 trained LeViT models, which you can directly plug into [`LevitModel`] or [`LevitForImageClassification`]. Techniques like data augmentation, optimization, and regularization were used in order to simulate training on a much larger dataset (while only using ImageNet-1k for pre-training). The 5 variants available are (all trained on images of size 224x224): *facebook/levit-128S*, *facebook/levit-128*, *facebook/levit-192*, *facebook/levit-256* and *facebook/levit-384*. Note that one should use [`LevitImageProcessor`] in order to prepare images for the model. - [`LevitForImageClassificationWithTeacher`] currently supports only inference and not training or fine-tuning. - You can check out demo notebooks regarding inference as well as fine-tuning on custom data [here](https://github.com/NielsRogge/Transformers-Tutorials/tree/master/VisionTransformer) (you can just replace [`ViTFeatureExtractor`] by [`LevitImageProcessor`] and [`ViTForImageClassification`] by [`LevitForImageClassification`] or [`LevitForImageClassificationWithTeacher`]). ## Resources A list of official Hugging Face and community (indicated by 🌎) resources to help you get started with LeViT. <PipelineTag pipeline="image-classification"/> - [`LevitForImageClassification`] is supported by this [example script](https://github.com/huggingface/transformers/tree/main/examples/pytorch/image-classification) and [notebook](https://colab.research.google.com/github/huggingface/notebooks/blob/main/examples/image_classification.ipynb). - See also: [Image classification task guide](../tasks/image_classification) If you're interested in submitting a resource to be included here, please feel free to open a Pull Request and we'll review it! The resource should ideally demonstrate something new instead of duplicating an existing resource. ## LevitConfig [[autodoc]] LevitConfig ## LevitFeatureExtractor [[autodoc]] LevitFeatureExtractor - __call__ ## LevitImageProcessor [[autodoc]] LevitImageProcessor - preprocess ## LevitModel [[autodoc]] LevitModel - forward ## LevitForImageClassification [[autodoc]] LevitForImageClassification - forward ## LevitForImageClassificationWithTeacher [[autodoc]] LevitForImageClassificationWithTeacher - forward

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# MBart and MBart-50 <div class="flex flex-wrap space-x-1"> <a href="https://huggingface.co/models?filter=mbart"> <img alt="Models" src="https://img.shields.io/badge/All_model_pages-mbart-blueviolet"> </a> <a href="https://huggingface.co/spaces/docs-demos/mbart-large-50-one-to-many-mmt"> <img alt="Spaces" src="https://img.shields.io/badge/%F0%9F%A4%97%20Hugging%20Face-Spaces-blue"> </a> </div> ## Overview of MBart The MBart model was presented in [Multilingual Denoising Pre-training for Neural Machine Translation](https://arxiv.org/abs/2001.08210) by Yinhan Liu, Jiatao Gu, Naman Goyal, Xian Li, Sergey Edunov Marjan Ghazvininejad, Mike Lewis, Luke Zettlemoyer. According to the abstract, MBART is a sequence-to-sequence denoising auto-encoder pretrained on large-scale monolingual corpora in many languages using the BART objective. mBART is one of the first methods for pretraining a complete sequence-to-sequence model by denoising full texts in multiple languages, while previous approaches have focused only on the encoder, decoder, or reconstructing parts of the text. This model was contributed by [valhalla](https://huggingface.co/valhalla). The Authors' code can be found [here](https://github.com/pytorch/fairseq/tree/master/examples/mbart) ### Training of MBart MBart is a multilingual encoder-decoder (sequence-to-sequence) model primarily intended for translation task. As the model is multilingual it expects the sequences in a different format. A special language id token is added in both the source and target text. The source text format is `X [eos, src_lang_code]` where `X` is the source text. The target text format is `[tgt_lang_code] X [eos]`. `bos` is never used. The regular [`~MBartTokenizer.__call__`] will encode source text format passed as first argument or with the `text` keyword, and target text format passed with the `text_label` keyword argument. - Supervised training ```python >>> from transformers import MBartForConditionalGeneration, MBartTokenizer >>> tokenizer = MBartTokenizer.from_pretrained("facebook/mbart-large-en-ro", src_lang="en_XX", tgt_lang="ro_RO") >>> example_english_phrase = "UN Chief Says There Is No Military Solution in Syria" >>> expected_translation_romanian = "Şeful ONU declară că nu există o soluţie militară în Siria" >>> inputs = tokenizer(example_english_phrase, text_target=expected_translation_romanian, return_tensors="pt") >>> model = MBartForConditionalGeneration.from_pretrained("facebook/mbart-large-en-ro") >>> # forward pass >>> model(**inputs) ``` - Generation While generating the target text set the `decoder_start_token_id` to the target language id. The following example shows how to translate English to Romanian using the *facebook/mbart-large-en-ro* model. ```python >>> from transformers import MBartForConditionalGeneration, MBartTokenizer >>> tokenizer = MBartTokenizer.from_pretrained("facebook/mbart-large-en-ro", src_lang="en_XX") >>> article = "UN Chief Says There Is No Military Solution in Syria" >>> inputs = tokenizer(article, return_tensors="pt") >>> translated_tokens = model.generate(**inputs, decoder_start_token_id=tokenizer.lang_code_to_id["ro_RO"]) >>> tokenizer.batch_decode(translated_tokens, skip_special_tokens=True)[0] "Şeful ONU declară că nu există o soluţie militară în Siria" ``` ## Overview of MBart-50 MBart-50 was introduced in the [Multilingual Translation with Extensible Multilingual Pretraining and Finetuning](https://arxiv.org/abs/2008.00401) paper by Yuqing Tang, Chau Tran, Xian Li, Peng-Jen Chen, Naman Goyal, Vishrav Chaudhary, Jiatao Gu, Angela Fan. MBart-50 is created using the original *mbart-large-cc25* checkpoint by extendeding its embedding layers with randomly initialized vectors for an extra set of 25 language tokens and then pretrained on 50 languages. According to the abstract *Multilingual translation models can be created through multilingual finetuning. Instead of finetuning on one direction, a pretrained model is finetuned on many directions at the same time. It demonstrates that pretrained models can be extended to incorporate additional languages without loss of performance. Multilingual finetuning improves on average 1 BLEU over the strongest baselines (being either multilingual from scratch or bilingual finetuning) while improving 9.3 BLEU on average over bilingual baselines from scratch.* ### Training of MBart-50 The text format for MBart-50 is slightly different from mBART. For MBart-50 the language id token is used as a prefix for both source and target text i.e the text format is `[lang_code] X [eos]`, where `lang_code` is source language id for source text and target language id for target text, with `X` being the source or target text respectively. MBart-50 has its own tokenizer [`MBart50Tokenizer`]. - Supervised training ```python from transformers import MBartForConditionalGeneration, MBart50TokenizerFast model = MBartForConditionalGeneration.from_pretrained("facebook/mbart-large-50") tokenizer = MBart50TokenizerFast.from_pretrained("facebook/mbart-large-50", src_lang="en_XX", tgt_lang="ro_RO") src_text = " UN Chief Says There Is No Military Solution in Syria" tgt_text = "Şeful ONU declară că nu există o soluţie militară în Siria" model_inputs = tokenizer(src_text, text_target=tgt_text, return_tensors="pt") model(**model_inputs) # forward pass ``` - Generation To generate using the mBART-50 multilingual translation models, `eos_token_id` is used as the `decoder_start_token_id` and the target language id is forced as the first generated token. To force the target language id as the first generated token, pass the *forced_bos_token_id* parameter to the *generate* method. The following example shows how to translate between Hindi to French and Arabic to English using the *facebook/mbart-50-large-many-to-many* checkpoint. ```python from transformers import MBartForConditionalGeneration, MBart50TokenizerFast article_hi = "संयुक्त राष्ट्र के प्रमुख का कहना है कि सीरिया में कोई सैन्य समाधान नहीं है" article_ar = "الأمين العام للأمم المتحدة يقول إنه لا يوجد حل عسكري في سوريا." model = MBartForConditionalGeneration.from_pretrained("facebook/mbart-large-50-many-to-many-mmt") tokenizer = MBart50TokenizerFast.from_pretrained("facebook/mbart-large-50-many-to-many-mmt") # translate Hindi to French tokenizer.src_lang = "hi_IN" encoded_hi = tokenizer(article_hi, return_tensors="pt") generated_tokens = model.generate(**encoded_hi, forced_bos_token_id=tokenizer.lang_code_to_id["fr_XX"]) tokenizer.batch_decode(generated_tokens, skip_special_tokens=True) # => "Le chef de l 'ONU affirme qu 'il n 'y a pas de solution militaire en Syria." # translate Arabic to English tokenizer.src_lang = "ar_AR" encoded_ar = tokenizer(article_ar, return_tensors="pt") generated_tokens = model.generate(**encoded_ar, forced_bos_token_id=tokenizer.lang_code_to_id["en_XX"]) tokenizer.batch_decode(generated_tokens, skip_special_tokens=True) # => "The Secretary-General of the United Nations says there is no military solution in Syria." ``` ## Documentation resources - [Text classification task guide](../tasks/sequence_classification) - [Question answering task guide](../tasks/question_answering) - [Causal language modeling task guide](../tasks/language_modeling) - [Masked language modeling task guide](../tasks/masked_language_modeling) - [Translation task guide](../tasks/translation) - [Summarization task guide](../tasks/summarization) ## MBartConfig [[autodoc]] MBartConfig ## MBartTokenizer [[autodoc]] MBartTokenizer - build_inputs_with_special_tokens ## MBartTokenizerFast [[autodoc]] MBartTokenizerFast ## MBart50Tokenizer [[autodoc]] MBart50Tokenizer ## MBart50TokenizerFast [[autodoc]] MBart50TokenizerFast <frameworkcontent> <pt> ## MBartModel [[autodoc]] MBartModel ## MBartForConditionalGeneration [[autodoc]] MBartForConditionalGeneration ## MBartForQuestionAnswering [[autodoc]] MBartForQuestionAnswering ## MBartForSequenceClassification [[autodoc]] MBartForSequenceClassification ## MBartForCausalLM [[autodoc]] MBartForCausalLM - forward </pt> <tf> ## TFMBartModel [[autodoc]] TFMBartModel - call ## TFMBartForConditionalGeneration [[autodoc]] TFMBartForConditionalGeneration - call </tf> <jax> ## FlaxMBartModel [[autodoc]] FlaxMBartModel - __call__ - encode - decode ## FlaxMBartForConditionalGeneration [[autodoc]] FlaxMBartForConditionalGeneration - __call__ - encode - decode ## FlaxMBartForSequenceClassification [[autodoc]] FlaxMBartForSequenceClassification - __call__ - encode - decode ## FlaxMBartForQuestionAnswering [[autodoc]] FlaxMBartForQuestionAnswering - __call__ - encode - decode </jax> </frameworkcontent>

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# MPT ## Overview The MPT model was proposed by the [MosaicML](https://www.mosaicml.com/) team and released with multiple sizes and finetuned variants. The MPT models is a series of open source and commercially usable LLMs pre-trained on 1T tokens. MPT models are GPT-style decoder-only transformers with several improvements: performance-optimized layer implementations, architecture changes that provide greater training stability, and the elimination of context length limits by replacing positional embeddings with ALiBi. - MPT base: MPT base pre-trained models on next token prediction - MPT instruct: MPT base models fine-tuned on instruction based tasks - MPT storywriter: MPT base models fine-tuned for 2500 steps on 65k-token excerpts of fiction books contained in the books3 corpus, this enables the model to handle very long sequences The original code is available at the [`llm-foundry`](https://github.com/mosaicml/llm-foundry/tree/main) repository. Read more about it [in the release blogpost](https://www.mosaicml.com/blog/mpt-7b) ## Usage tips - Learn more about some techniques behind training of the model [in this section of llm-foundry repository](https://github.com/mosaicml/llm-foundry/blob/main/TUTORIAL.md#faqs) - If you want to use the advanced version of the model (triton kernels, direct flash attention integration), you can still use the original model implementation by adding `trust_remote_code=True` when calling `from_pretrained`. ## Resources - [Fine-tuning Notebook](https://colab.research.google.com/drive/1HCpQkLL7UXW8xJUJJ29X7QAeNJKO0frZ?usp=sharing) on how to fine-tune MPT-7B on a free Google Colab instance to turn the model into a Chatbot. ## MptConfig [[autodoc]] MptConfig - all ## MptModel [[autodoc]] MptModel - forward ## MptForCausalLM [[autodoc]] MptForCausalLM - forward ## MptForSequenceClassification [[autodoc]] MptForSequenceClassification - forward ## MptForTokenClassification [[autodoc]] MptForTokenClassification - forward ## MptForQuestionAnswering [[autodoc]] MptForQuestionAnswering - forward

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# OWL-ViT ## Overview The OWL-ViT (short for Vision Transformer for Open-World Localization) was proposed in [Simple Open-Vocabulary Object Detection with Vision Transformers](https://arxiv.org/abs/2205.06230) by Matthias Minderer, Alexey Gritsenko, Austin Stone, Maxim Neumann, Dirk Weissenborn, Alexey Dosovitskiy, Aravindh Mahendran, Anurag Arnab, Mostafa Dehghani, Zhuoran Shen, Xiao Wang, Xiaohua Zhai, Thomas Kipf, and Neil Houlsby. OWL-ViT is an open-vocabulary object detection network trained on a variety of (image, text) pairs. It can be used to query an image with one or multiple text queries to search for and detect target objects described in text. The abstract from the paper is the following: *Combining simple architectures with large-scale pre-training has led to massive improvements in image classification. For object detection, pre-training and scaling approaches are less well established, especially in the long-tailed and open-vocabulary setting, where training data is relatively scarce. In this paper, we propose a strong recipe for transferring image-text models to open-vocabulary object detection. We use a standard Vision Transformer architecture with minimal modifications, contrastive image-text pre-training, and end-to-end detection fine-tuning. Our analysis of the scaling properties of this setup shows that increasing image-level pre-training and model size yield consistent improvements on the downstream detection task. We provide the adaptation strategies and regularizations needed to attain very strong performance on zero-shot text-conditioned and one-shot image-conditioned object detection. Code and models are available on GitHub.* <img src="https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/transformers/model_doc/owlvit_architecture.jpg" alt="drawing" width="600"/> <small> OWL-ViT architecture. Taken from the <a href="https://arxiv.org/abs/2205.06230">original paper</a>. </small> This model was contributed by [adirik](https://huggingface.co/adirik). The original code can be found [here](https://github.com/google-research/scenic/tree/main/scenic/projects/owl_vit). ## Usage tips OWL-ViT is a zero-shot text-conditioned object detection model. OWL-ViT uses [CLIP](clip) as its multi-modal backbone, with a ViT-like Transformer to get visual features and a causal language model to get the text features. To use CLIP for detection, OWL-ViT removes the final token pooling layer of the vision model and attaches a lightweight classification and box head to each transformer output token. Open-vocabulary classification is enabled by replacing the fixed classification layer weights with the class-name embeddings obtained from the text model. The authors first train CLIP from scratch and fine-tune it end-to-end with the classification and box heads on standard detection datasets using a bipartite matching loss. One or multiple text queries per image can be used to perform zero-shot text-conditioned object detection. [`OwlViTImageProcessor`] can be used to resize (or rescale) and normalize images for the model and [`CLIPTokenizer`] is used to encode the text. [`OwlViTProcessor`] wraps [`OwlViTImageProcessor`] and [`CLIPTokenizer`] into a single instance to both encode the text and prepare the images. The following example shows how to perform object detection using [`OwlViTProcessor`] and [`OwlViTForObjectDetection`]. ```python >>> import requests >>> from PIL import Image >>> import torch >>> from transformers import OwlViTProcessor, OwlViTForObjectDetection >>> processor = OwlViTProcessor.from_pretrained("google/owlvit-base-patch32") >>> model = OwlViTForObjectDetection.from_pretrained("google/owlvit-base-patch32") >>> url = "http://images.cocodataset.org/val2017/000000039769.jpg" >>> image = Image.open(requests.get(url, stream=True).raw) >>> texts = [["a photo of a cat", "a photo of a dog"]] >>> inputs = processor(text=texts, images=image, return_tensors="pt") >>> outputs = model(**inputs) >>> # Target image sizes (height, width) to rescale box predictions [batch_size, 2] >>> target_sizes = torch.Tensor([image.size[::-1]]) >>> # Convert outputs (bounding boxes and class logits) to Pascal VOC format (xmin, ymin, xmax, ymax) >>> results = processor.post_process_object_detection(outputs=outputs, target_sizes=target_sizes, threshold=0.1) >>> i = 0 # Retrieve predictions for the first image for the corresponding text queries >>> text = texts[i] >>> boxes, scores, labels = results[i]["boxes"], results[i]["scores"], results[i]["labels"] >>> for box, score, label in zip(boxes, scores, labels): ... box = [round(i, 2) for i in box.tolist()] ... print(f"Detected {text[label]} with confidence {round(score.item(), 3)} at location {box}") Detected a photo of a cat with confidence 0.707 at location [324.97, 20.44, 640.58, 373.29] Detected a photo of a cat with confidence 0.717 at location [1.46, 55.26, 315.55, 472.17] ``` ## Resources A demo notebook on using OWL-ViT for zero- and one-shot (image-guided) object detection can be found [here](https://github.com/huggingface/notebooks/blob/main/examples/zeroshot_object_detection_with_owlvit.ipynb). ## OwlViTConfig [[autodoc]] OwlViTConfig - from_text_vision_configs ## OwlViTTextConfig [[autodoc]] OwlViTTextConfig ## OwlViTVisionConfig [[autodoc]] OwlViTVisionConfig ## OwlViTImageProcessor [[autodoc]] OwlViTImageProcessor - preprocess - post_process_object_detection - post_process_image_guided_detection ## OwlViTFeatureExtractor [[autodoc]] OwlViTFeatureExtractor - __call__ - post_process - post_process_image_guided_detection ## OwlViTProcessor [[autodoc]] OwlViTProcessor ## OwlViTModel [[autodoc]] OwlViTModel - forward - get_text_features - get_image_features ## OwlViTTextModel [[autodoc]] OwlViTTextModel - forward ## OwlViTVisionModel [[autodoc]] OwlViTVisionModel - forward ## OwlViTForObjectDetection [[autodoc]] OwlViTForObjectDetection - forward - image_guided_detection

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# Qwen2 ## Overview Qwen2 is the new model series of large language models from the Qwen team. Previously, we released the Qwen series, including Qwen-72B, Qwen-1.8B, Qwen-VL, Qwen-Audio, etc. ### Model Details Qwen2 is a language model series including decoder language models of different model sizes. For each size, we release the base language model and the aligned chat model. It is based on the Transformer architecture with SwiGLU activation, attention QKV bias, group query attention, mixture of sliding window attention and full attention, etc. Additionally, we have an improved tokenizer adaptive to multiple natural languages and codes. ## Usage tips `Qwen2-7B-beta` and `Qwen2-7B-Chat-beta` can be found on the [Huggingface Hub](https://huggingface.co/Qwen) In the following, we demonstrate how to use `Qwen2-7B-Chat-beta` for the inference. Note that we have used the ChatML format for dialog, in this demo we show how to leverage `apply_chat_template` for this purpose. ```python >>> from transformers import AutoModelForCausalLM, AutoTokenizer >>> device = "cuda" # the device to load the model onto >>> model = AutoModelForCausalLM.from_pretrained("Qwen2/Qwen2-7B-Chat-beta", device_map="auto") >>> tokenizer = AutoTokenizer.from_pretrained("Qwen2/Qwen2-7B-Chat-beta") >>> prompt = "Give me a short introduction to large language model." >>> messages = [{"role": "user", "content": prompt}] >>> text = tokenizer.apply_chat_template(messages, tokenize=False, add_generation_prompt=True) >>> model_inputs = tokenizer([text], return_tensors="pt").to(device) >>> generated_ids = model.generate(model_inputs.input_ids, max_new_tokens=512, do_sample=True) >>> generated_ids = [output_ids[len(input_ids):] for input_ids, output_ids in zip(model_inputs.input_ids, generated_ids)] >>> response = tokenizer.batch_decode(generated_ids, skip_special_tokens=True)[0] ``` ## Qwen2Config [[autodoc]] Qwen2Config ## Qwen2Tokenizer [[autodoc]] Qwen2Tokenizer - save_vocabulary ## Qwen2TokenizerFast [[autodoc]] Qwen2TokenizerFast ## Qwen2Model [[autodoc]] Qwen2Model - forward ## Qwen2ForCausalLM [[autodoc]] Qwen2ForCausalLM - forward ## Qwen2ForSequenceClassification [[autodoc]] Qwen2ForSequenceClassification - forward

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# SegFormer ## Overview The SegFormer model was proposed in [SegFormer: Simple and Efficient Design for Semantic Segmentation with Transformers](https://arxiv.org/abs/2105.15203) by Enze Xie, Wenhai Wang, Zhiding Yu, Anima Anandkumar, Jose M. Alvarez, Ping Luo. The model consists of a hierarchical Transformer encoder and a lightweight all-MLP decode head to achieve great results on image segmentation benchmarks such as ADE20K and Cityscapes. The abstract from the paper is the following: *We present SegFormer, a simple, efficient yet powerful semantic segmentation framework which unifies Transformers with lightweight multilayer perception (MLP) decoders. SegFormer has two appealing features: 1) SegFormer comprises a novel hierarchically structured Transformer encoder which outputs multiscale features. It does not need positional encoding, thereby avoiding the interpolation of positional codes which leads to decreased performance when the testing resolution differs from training. 2) SegFormer avoids complex decoders. The proposed MLP decoder aggregates information from different layers, and thus combining both local attention and global attention to render powerful representations. We show that this simple and lightweight design is the key to efficient segmentation on Transformers. We scale our approach up to obtain a series of models from SegFormer-B0 to SegFormer-B5, reaching significantly better performance and efficiency than previous counterparts. For example, SegFormer-B4 achieves 50.3% mIoU on ADE20K with 64M parameters, being 5x smaller and 2.2% better than the previous best method. Our best model, SegFormer-B5, achieves 84.0% mIoU on Cityscapes validation set and shows excellent zero-shot robustness on Cityscapes-C.* The figure below illustrates the architecture of SegFormer. Taken from the [original paper](https://arxiv.org/abs/2105.15203). <img width="600" src="https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/segformer_architecture.png"/> This model was contributed by [nielsr](https://huggingface.co/nielsr). The TensorFlow version of the model was contributed by [sayakpaul](https://huggingface.co/sayakpaul). The original code can be found [here](https://github.com/NVlabs/SegFormer). ## Usage tips - SegFormer consists of a hierarchical Transformer encoder, and a lightweight all-MLP decoder head. [`SegformerModel`] is the hierarchical Transformer encoder (which in the paper is also referred to as Mix Transformer or MiT). [`SegformerForSemanticSegmentation`] adds the all-MLP decoder head on top to perform semantic segmentation of images. In addition, there's [`SegformerForImageClassification`] which can be used to - you guessed it - classify images. The authors of SegFormer first pre-trained the Transformer encoder on ImageNet-1k to classify images. Next, they throw away the classification head, and replace it by the all-MLP decode head. Next, they fine-tune the model altogether on ADE20K, Cityscapes and COCO-stuff, which are important benchmarks for semantic segmentation. All checkpoints can be found on the [hub](https://huggingface.co/models?other=segformer). - The quickest way to get started with SegFormer is by checking the [example notebooks](https://github.com/NielsRogge/Transformers-Tutorials/tree/master/SegFormer) (which showcase both inference and fine-tuning on custom data). One can also check out the [blog post](https://huggingface.co/blog/fine-tune-segformer) introducing SegFormer and illustrating how it can be fine-tuned on custom data. - TensorFlow users should refer to [this repository](https://github.com/deep-diver/segformer-tf-transformers) that shows off-the-shelf inference and fine-tuning. - One can also check out [this interactive demo on Hugging Face Spaces](https://huggingface.co/spaces/chansung/segformer-tf-transformers) to try out a SegFormer model on custom images. - SegFormer works on any input size, as it pads the input to be divisible by `config.patch_sizes`. - One can use [`SegformerImageProcessor`] to prepare images and corresponding segmentation maps for the model. Note that this image processor is fairly basic and does not include all data augmentations used in the original paper. The original preprocessing pipelines (for the ADE20k dataset for instance) can be found [here](https://github.com/NVlabs/SegFormer/blob/master/local_configs/_base_/datasets/ade20k_repeat.py). The most important preprocessing step is that images and segmentation maps are randomly cropped and padded to the same size, such as 512x512 or 640x640, after which they are normalized. - One additional thing to keep in mind is that one can initialize [`SegformerImageProcessor`] with `reduce_labels` set to `True` or `False`. In some datasets (like ADE20k), the 0 index is used in the annotated segmentation maps for background. However, ADE20k doesn't include the "background" class in its 150 labels. Therefore, `reduce_labels` is used to reduce all labels by 1, and to make sure no loss is computed for the background class (i.e. it replaces 0 in the annotated maps by 255, which is the *ignore_index* of the loss function used by [`SegformerForSemanticSegmentation`]). However, other datasets use the 0 index as background class and include this class as part of all labels. In that case, `reduce_labels` should be set to `False`, as loss should also be computed for the background class. - As most models, SegFormer comes in different sizes, the details of which can be found in the table below (taken from Table 7 of the [original paper](https://arxiv.org/abs/2105.15203)). | **Model variant** | **Depths** | **Hidden sizes** | **Decoder hidden size** | **Params (M)** | **ImageNet-1k Top 1** | | :---------------: | ------------- | ------------------- | :---------------------: | :------------: | :-------------------: | | MiT-b0 | [2, 2, 2, 2] | [32, 64, 160, 256] | 256 | 3.7 | 70.5 | | MiT-b1 | [2, 2, 2, 2] | [64, 128, 320, 512] | 256 | 14.0 | 78.7 | | MiT-b2 | [3, 4, 6, 3] | [64, 128, 320, 512] | 768 | 25.4 | 81.6 | | MiT-b3 | [3, 4, 18, 3] | [64, 128, 320, 512] | 768 | 45.2 | 83.1 | | MiT-b4 | [3, 8, 27, 3] | [64, 128, 320, 512] | 768 | 62.6 | 83.6 | | MiT-b5 | [3, 6, 40, 3] | [64, 128, 320, 512] | 768 | 82.0 | 83.8 | Note that MiT in the above table refers to the Mix Transformer encoder backbone introduced in SegFormer. For SegFormer's results on the segmentation datasets like ADE20k, refer to the [paper](https://arxiv.org/abs/2105.15203). ## Resources A list of official Hugging Face and community (indicated by 🌎) resources to help you get started with SegFormer. <PipelineTag pipeline="image-classification"/> - [`SegformerForImageClassification`] is supported by this [example script](https://github.com/huggingface/transformers/tree/main/examples/pytorch/image-classification) and [notebook](https://colab.research.google.com/github/huggingface/notebooks/blob/main/examples/image_classification.ipynb). - [Image classification task guide](../tasks/image_classification) Semantic segmentation: - [`SegformerForSemanticSegmentation`] is supported by this [example script](https://github.com/huggingface/transformers/tree/main/examples/pytorch/semantic-segmentation). - A blog on fine-tuning SegFormer on a custom dataset can be found [here](https://huggingface.co/blog/fine-tune-segformer). - More demo notebooks on SegFormer (both inference + fine-tuning on a custom dataset) can be found [here](https://github.com/NielsRogge/Transformers-Tutorials/tree/master/SegFormer). - [`TFSegformerForSemanticSegmentation`] is supported by this [example notebook](https://github.com/huggingface/notebooks/blob/main/examples/semantic_segmentation-tf.ipynb). - [Semantic segmentation task guide](../tasks/semantic_segmentation) If you're interested in submitting a resource to be included here, please feel free to open a Pull Request and we'll review it! The resource should ideally demonstrate something new instead of duplicating an existing resource. ## SegformerConfig [[autodoc]] SegformerConfig ## SegformerFeatureExtractor [[autodoc]] SegformerFeatureExtractor - __call__ - post_process_semantic_segmentation ## SegformerImageProcessor [[autodoc]] SegformerImageProcessor - preprocess - post_process_semantic_segmentation <frameworkcontent> <pt> ## SegformerModel [[autodoc]] SegformerModel - forward ## SegformerDecodeHead [[autodoc]] SegformerDecodeHead - forward ## SegformerForImageClassification [[autodoc]] SegformerForImageClassification - forward ## SegformerForSemanticSegmentation [[autodoc]] SegformerForSemanticSegmentation - forward </pt> <tf> ## TFSegformerDecodeHead [[autodoc]] TFSegformerDecodeHead - call ## TFSegformerModel [[autodoc]] TFSegformerModel - call ## TFSegformerForImageClassification [[autodoc]] TFSegformerForImageClassification - call ## TFSegformerForSemanticSegmentation [[autodoc]] TFSegformerForSemanticSegmentation - call </tf> </frameworkcontent>

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# T5 <div class="flex flex-wrap space-x-1"> <a href="https://huggingface.co/models?filter=t5"> <img alt="Models" src="https://img.shields.io/badge/All_model_pages-t5-blueviolet"> </a> <a href="https://huggingface.co/spaces/docs-demos/t5-base"> <img alt="Spaces" src="https://img.shields.io/badge/%F0%9F%A4%97%20Hugging%20Face-Spaces-blue"> </a> <a href="https://huggingface.co/papers/1910.10683"> <img alt="Paper page" src="https://img.shields.io/badge/Paper%20page-1910.10683-green"> </a> </div> ## Overview The T5 model was presented in [Exploring the Limits of Transfer Learning with a Unified Text-to-Text Transformer](https://arxiv.org/pdf/1910.10683.pdf) by [Colin Raffel](https://huggingface.co/craffel), Noam Shazeer, [Adam Roberts](https://huggingface.co/adarob), Katherine Lee, Sharan Narang, Michael Matena, Yanqi Zhou, Wei Li, [Peter J. Liu](https://huggingface.co/peterjliu). The abstract from the paper is the following: *Transfer learning, where a model is first pre-trained on a data-rich task before being fine-tuned on a downstream task, has emerged as a powerful technique in natural language processing (NLP). The effectiveness of transfer learning has given rise to a diversity of approaches, methodology, and practice. In this paper, we explore the landscape of transfer learning techniques for NLP by introducing a unified framework that converts every language problem into a text-to-text format. Our systematic study compares pretraining objectives, architectures, unlabeled datasets, transfer approaches, and other factors on dozens of language understanding tasks. By combining the insights from our exploration with scale and our new "Colossal Clean Crawled Corpus", we achieve state-of-the-art results on many benchmarks covering summarization, question answering, text classification, and more. To facilitate future work on transfer learning for NLP, we release our dataset, pre-trained models, and code.* All checkpoints can be found on the [hub](https://huggingface.co/models?search=t5). This model was contributed by [thomwolf](https://huggingface.co/thomwolf). The original code can be found [here](https://github.com/google-research/text-to-text-transfer-transformer). ## Usage tips - T5 is an encoder-decoder model pre-trained on a multi-task mixture of unsupervised and supervised tasks and for which each task is converted into a text-to-text format. T5 works well on a variety of tasks out-of-the-box by prepending a different prefix to the input corresponding to each task, e.g., for translation: *translate English to German: ...*, for summarization: *summarize: ...*. - The pretraining includes both supervised and self-supervised training. Supervised training is conducted on downstream tasks provided by the GLUE and SuperGLUE benchmarks (converting them into text-to-text tasks as explained above). - Self-supervised training uses corrupted tokens, by randomly removing 15% of the tokens and replacing them with individual sentinel tokens (if several consecutive tokens are marked for removal, the whole group is replaced with a single sentinel token). The input of the encoder is the corrupted sentence, the input of the decoder is the original sentence and the target is then the dropped out tokens delimited by their sentinel tokens. - T5 uses relative scalar embeddings. Encoder input padding can be done on the left and on the right. - See the [training](#training), [inference](#inference) and [resources](#resources) sections below for all details regarding usage. T5 comes in different sizes: - [google-t5/t5-small](https://huggingface.co/google-t5/t5-small) - [google-t5/t5-base](https://huggingface.co/google-t5/t5-base) - [google-t5/t5-large](https://huggingface.co/google-t5/t5-large) - [google-t5/t5-3b](https://huggingface.co/google-t5/t5-3b) - [google-t5/t5-11b](https://huggingface.co/google-t5/t5-11b). Based on the original T5 model, Google has released some follow-up works: - **T5v1.1**: T5v1.1 is an improved version of T5 with some architectural tweaks, and is pre-trained on C4 only without mixing in the supervised tasks. Refer to the documentation of T5v1.1 which can be found [here](t5v1.1). - **mT5**: mT5 is a multilingual T5 model. It is pre-trained on the mC4 corpus, which includes 101 languages. Refer to the documentation of mT5 which can be found [here](mt5). - **byT5**: byT5 is a T5 model pre-trained on byte sequences rather than SentencePiece subword token sequences. Refer to the documentation of byT5 which can be found [here](byt5). - **UL2**: UL2 is a T5 like model pretrained on various denoising objectives - **Flan-T5**: Flan is a pretraining methods that is based on prompting. The Flan-T5 are T5 models trained on the Flan collection of datasets which include: `taskmaster2`, `djaym7/wiki_dialog`, `deepmind/code_contests`, `lambada`, `gsm8k`, `aqua_rat`, `esnli`, `quasc` and `qed`. - **FLan-UL2** : the UL2 model finetuned using the "Flan" prompt tuning and dataset collection. - **UMT5**: UmT5 is a multilingual T5 model trained on an improved and refreshed mC4 multilingual corpus, 29 trillion characters across 107 language, using a new sampling method, UniMax. Refer to the documentation of mT5 which can be found [here](umt5). ## Training T5 is an encoder-decoder model and converts all NLP problems into a text-to-text format. It is trained using teacher forcing. This means that for training, we always need an input sequence and a corresponding target sequence. The input sequence is fed to the model using `input_ids`. The target sequence is shifted to the right, i.e., prepended by a start-sequence token and fed to the decoder using the `decoder_input_ids`. In teacher-forcing style, the target sequence is then appended by the EOS token and corresponds to the `labels`. The PAD token is hereby used as the start-sequence token. T5 can be trained / fine-tuned both in a supervised and unsupervised fashion. One can use [`T5ForConditionalGeneration`] (or the Tensorflow/Flax variant), which includes the language modeling head on top of the decoder. - Unsupervised denoising training In this setup, spans of the input sequence are masked by so-called sentinel tokens (*a.k.a* unique mask tokens) and the output sequence is formed as a concatenation of the same sentinel tokens and the *real* masked tokens. Each sentinel token represents a unique mask token for this sentence and should start with `<extra_id_0>`, `<extra_id_1>`, ... up to `<extra_id_99>`. As a default, 100 sentinel tokens are available in [`T5Tokenizer`]. For instance, the sentence "The cute dog walks in the park" with the masks put on "cute dog" and "the" should be processed as follows: ```python >>> from transformers import T5Tokenizer, T5ForConditionalGeneration >>> tokenizer = T5Tokenizer.from_pretrained("google-t5/t5-small") >>> model = T5ForConditionalGeneration.from_pretrained("google-t5/t5-small") >>> input_ids = tokenizer("The <extra_id_0> walks in <extra_id_1> park", return_tensors="pt").input_ids >>> labels = tokenizer("<extra_id_0> cute dog <extra_id_1> the <extra_id_2>", return_tensors="pt").input_ids >>> # the forward function automatically creates the correct decoder_input_ids >>> loss = model(input_ids=input_ids, labels=labels).loss >>> loss.item() 3.7837 ``` If you're interested in pre-training T5 on a new corpus, check out the [run_t5_mlm_flax.py](https://github.com/huggingface/transformers/tree/main/examples/flax/language-modeling) script in the Examples directory. - Supervised training In this setup, the input sequence and output sequence are a standard sequence-to-sequence input-output mapping. Suppose that we want to fine-tune the model for translation for example, and we have a training example: the input sequence "The house is wonderful." and output sequence "Das Haus ist wunderbar.", then they should be prepared for the model as follows: ```python >>> from transformers import T5Tokenizer, T5ForConditionalGeneration >>> tokenizer = T5Tokenizer.from_pretrained("google-t5/t5-small") >>> model = T5ForConditionalGeneration.from_pretrained("google-t5/t5-small") >>> input_ids = tokenizer("translate English to German: The house is wonderful.", return_tensors="pt").input_ids >>> labels = tokenizer("Das Haus ist wunderbar.", return_tensors="pt").input_ids >>> # the forward function automatically creates the correct decoder_input_ids >>> loss = model(input_ids=input_ids, labels=labels).loss >>> loss.item() 0.2542 ``` As you can see, only 2 inputs are required for the model in order to compute a loss: `input_ids` (which are the `input_ids` of the encoded input sequence) and `labels` (which are the `input_ids` of the encoded target sequence). The model will automatically create the `decoder_input_ids` based on the `labels`, by shifting them one position to the right and prepending the `config.decoder_start_token_id`, which for T5 is equal to 0 (i.e. the id of the pad token). Also note the task prefix: we prepend the input sequence with 'translate English to German: ' before encoding it. This will help in improving the performance, as this task prefix was used during T5's pre-training. However, the example above only shows a single training example. In practice, one trains deep learning models in batches. This entails that we must pad/truncate examples to the same length. For encoder-decoder models, one typically defines a `max_source_length` and `max_target_length`, which determine the maximum length of the input and output sequences respectively (otherwise they are truncated). These should be carefully set depending on the task. In addition, we must make sure that padding token id's of the `labels` are not taken into account by the loss function. In PyTorch and Tensorflow, this can be done by replacing them with -100, which is the `ignore_index` of the `CrossEntropyLoss`. In Flax, one can use the `decoder_attention_mask` to ignore padded tokens from the loss (see the [Flax summarization script](https://github.com/huggingface/transformers/tree/main/examples/flax/summarization) for details). We also pass `attention_mask` as additional input to the model, which makes sure that padding tokens of the inputs are ignored. The code example below illustrates all of this. ```python >>> from transformers import T5Tokenizer, T5ForConditionalGeneration >>> import torch >>> tokenizer = T5Tokenizer.from_pretrained("google-t5/t5-small") >>> model = T5ForConditionalGeneration.from_pretrained("google-t5/t5-small") >>> # the following 2 hyperparameters are task-specific >>> max_source_length = 512 >>> max_target_length = 128 >>> # Suppose we have the following 2 training examples: >>> input_sequence_1 = "Welcome to NYC" >>> output_sequence_1 = "Bienvenue à NYC" >>> input_sequence_2 = "HuggingFace is a company" >>> output_sequence_2 = "HuggingFace est une entreprise" >>> # encode the inputs >>> task_prefix = "translate English to French: " >>> input_sequences = [input_sequence_1, input_sequence_2] >>> encoding = tokenizer( ... [task_prefix + sequence for sequence in input_sequences], ... padding="longest", ... max_length=max_source_length, ... truncation=True, ... return_tensors="pt", ... ) >>> input_ids, attention_mask = encoding.input_ids, encoding.attention_mask >>> # encode the targets >>> target_encoding = tokenizer( ... [output_sequence_1, output_sequence_2], ... padding="longest", ... max_length=max_target_length, ... truncation=True, ... return_tensors="pt", ... ) >>> labels = target_encoding.input_ids >>> # replace padding token id's of the labels by -100 so it's ignored by the loss >>> labels[labels == tokenizer.pad_token_id] = -100 >>> # forward pass >>> loss = model(input_ids=input_ids, attention_mask=attention_mask, labels=labels).loss >>> loss.item() 0.188 ``` Additional training tips: - T5 models need a slightly higher learning rate than the default one set in the `Trainer` when using the AdamW optimizer. Typically, 1e-4 and 3e-4 work well for most problems (classification, summarization, translation, question answering, question generation). Note that T5 was pre-trained using the AdaFactor optimizer. According to [this forum post](https://discuss.huggingface.co/t/t5-finetuning-tips/684), task prefixes matter when (1) doing multi-task training (2) your task is similar or related to one of the supervised tasks used in T5's pre-training mixture (see Appendix D of the [paper](https://arxiv.org/pdf/1910.10683.pdf) for the task prefixes used). If training on TPU, it is recommended to pad all examples of the dataset to the same length or make use of *pad_to_multiple_of* to have a small number of predefined bucket sizes to fit all examples in. Dynamically padding batches to the longest example is not recommended on TPU as it triggers a recompilation for every batch shape that is encountered during training thus significantly slowing down the training. only padding up to the longest example in a batch) leads to very slow training on TPU. ## Inference At inference time, it is recommended to use [`~generation.GenerationMixin.generate`]. This method takes care of encoding the input and feeding the encoded hidden states via cross-attention layers to the decoder and auto-regressively generates the decoder output. Check out [this blog post](https://huggingface.co/blog/how-to-generate) to know all the details about generating text with Transformers. There's also [this blog post](https://huggingface.co/blog/encoder-decoder#encoder-decoder) which explains how generation works in general in encoder-decoder models. ```python >>> from transformers import T5Tokenizer, T5ForConditionalGeneration >>> tokenizer = T5Tokenizer.from_pretrained("google-t5/t5-small") >>> model = T5ForConditionalGeneration.from_pretrained("google-t5/t5-small") >>> input_ids = tokenizer("translate English to German: The house is wonderful.", return_tensors="pt").input_ids >>> outputs = model.generate(input_ids) >>> print(tokenizer.decode(outputs[0], skip_special_tokens=True)) Das Haus ist wunderbar. ``` Note that T5 uses the `pad_token_id` as the `decoder_start_token_id`, so when doing generation without using [`~generation.GenerationMixin.generate`], make sure you start it with the `pad_token_id`. The example above only shows a single example. You can also do batched inference, like so: ```python >>> from transformers import T5Tokenizer, T5ForConditionalGeneration >>> tokenizer = T5Tokenizer.from_pretrained("google-t5/t5-small") >>> model = T5ForConditionalGeneration.from_pretrained("google-t5/t5-small") >>> task_prefix = "translate English to German: " >>> # use different length sentences to test batching >>> sentences = ["The house is wonderful.", "I like to work in NYC."] >>> inputs = tokenizer([task_prefix + sentence for sentence in sentences], return_tensors="pt", padding=True) >>> output_sequences = model.generate( ... input_ids=inputs["input_ids"], ... attention_mask=inputs["attention_mask"], ... do_sample=False, # disable sampling to test if batching affects output ... ) >>> print(tokenizer.batch_decode(output_sequences, skip_special_tokens=True)) ['Das Haus ist wunderbar.', 'Ich arbeite gerne in NYC.'] ``` Because T5 has been trained with the span-mask denoising objective, it can be used to predict the sentinel (masked-out) tokens during inference. The predicted tokens will then be placed between the sentinel tokens. ```python >>> from transformers import T5Tokenizer, T5ForConditionalGeneration >>> tokenizer = T5Tokenizer.from_pretrained("google-t5/t5-small") >>> model = T5ForConditionalGeneration.from_pretrained("google-t5/t5-small") >>> input_ids = tokenizer("The <extra_id_0> walks in <extra_id_1> park", return_tensors="pt").input_ids >>> sequence_ids = model.generate(input_ids) >>> sequences = tokenizer.batch_decode(sequence_ids) >>> sequences ['<pad><extra_id_0> park offers<extra_id_1> the<extra_id_2> park.</s>'] ``` ## Performance If you'd like a faster training and inference performance, install [NVIDIA APEX](https://github.com/NVIDIA/apex#quick-start) for NVIDIA GPUs, or [ROCm APEX](https://github.com/ROCmSoftwarePlatform/apex) for AMD GPUs and then the model will automatically use `apex.normalization.FusedRMSNorm` instead of `T5LayerNorm`. The former uses an optimized fused kernel which is several times faster than the latter. ## Resources A list of official Hugging Face and community (indicated by 🌎) resources to help you get started with T5. If you're interested in submitting a resource to be included here, please feel free to open a Pull Request and we'll review it! The resource should ideally demonstrate something new instead of duplicating an existing resource. <PipelineTag pipeline="text-classification"/> - A notebook for how to [finetune T5 for classification and multiple choice](https://colab.research.google.com/github/patil-suraj/exploring-T5/blob/master/t5_fine_tuning.ipynb). - A notebook for how to [finetune T5 for sentiment span extraction](https://colab.research.google.com/github/enzoampil/t5-intro/blob/master/t5_qa_training_pytorch_span_extraction.ipynb). 🌎 <PipelineTag pipeline="token-classification"/> - A notebook for how to [finetune T5 for named entity recognition](https://colab.research.google.com/drive/1obr78FY_cBmWY5ODViCmzdY6O1KB65Vc?usp=sharing). 🌎 <PipelineTag pipeline="text-generation"/> - A notebook for [Finetuning CodeT5 for generating docstrings from Ruby code](https://colab.research.google.com/github/NielsRogge/Transformers-Tutorials/blob/master/T5/Fine_tune_CodeT5_for_generating_docstrings_from_Ruby_code.ipynb). <PipelineTag pipeline="summarization"/> - A notebook to [Finetune T5-base-dutch to perform Dutch abstractive summarization on a TPU](https://colab.research.google.com/github/NielsRogge/Transformers-Tutorials/blob/master/T5/Fine_tuning_Dutch_T5_base_on_CNN_Daily_Mail_for_summarization_(on_TPU_using_HuggingFace_Accelerate).ipynb). - A notebook for how to [finetune T5 for summarization in PyTorch and track experiments with WandB](https://colab.research.google.com/github/abhimishra91/transformers-tutorials/blob/master/transformers_summarization_wandb.ipynb#scrollTo=OKRpFvYhBauC). 🌎 - A blog post on [Distributed Training: Train BART/T5 for Summarization using 🤗 Transformers and Amazon SageMaker](https://huggingface.co/blog/sagemaker-distributed-training-seq2seq). - [`T5ForConditionalGeneration`] is supported by this [example script](https://github.com/huggingface/transformers/tree/main/examples/pytorch/summarization) and [notebook](https://colab.research.google.com/github/huggingface/notebooks/blob/main/examples/summarization.ipynb). - [`TFT5ForConditionalGeneration`] is supported by this [example script](https://github.com/huggingface/transformers/tree/main/examples/tensorflow/summarization) and [notebook](https://colab.research.google.com/github/huggingface/notebooks/blob/main/examples/summarization-tf.ipynb). - [`FlaxT5ForConditionalGeneration`] is supported by this [example script](https://github.com/huggingface/transformers/tree/main/examples/flax/summarization). - [Summarization](https://huggingface.co/course/chapter7/5?fw=pt#summarization) chapter of the 🤗 Hugging Face course. - [Summarization task guide](../tasks/summarization) <PipelineTag pipeline="fill-mask"/> - [`FlaxT5ForConditionalGeneration`] is supported by this [example script](https://github.com/huggingface/transformers/tree/main/examples/flax/language-modeling#t5-like-span-masked-language-modeling) for training T5 with a span-masked language model objective. The script also shows how to train a T5 tokenizer. [`FlaxT5ForConditionalGeneration`] is also supported by this [notebook](https://colab.research.google.com/github/huggingface/notebooks/blob/main/examples/masked_language_modeling_flax.ipynb). <PipelineTag pipeline="translation"/> - [`T5ForConditionalGeneration`] is supported by this [example script](https://github.com/huggingface/transformers/tree/main/examples/pytorch/translation) and [notebook](https://colab.research.google.com/github/huggingface/notebooks/blob/main/examples/translation.ipynb). - [`TFT5ForConditionalGeneration`] is supported by this [example script](https://github.com/huggingface/transformers/tree/main/examples/tensorflow/translation) and [notebook](https://colab.research.google.com/github/huggingface/notebooks/blob/main/examples/translation-tf.ipynb). - [Translation task guide](../tasks/translation) <PipelineTag pipeline="question-answering"/> - A notebook on how to [finetune T5 for question answering with TensorFlow 2](https://colab.research.google.com/github/snapthat/TF-T5-text-to-text/blob/master/snapthatT5/notebooks/TF-T5-Datasets%20Training.ipynb). 🌎 - A notebook on how to [finetune T5 for question answering on a TPU](https://colab.research.google.com/github/patil-suraj/exploring-T5/blob/master/T5_on_TPU.ipynb#scrollTo=QLGiFCDqvuil). 🚀 **Deploy** - A blog post on how to deploy [T5 11B for inference for less than $500](https://www.philschmid.de/deploy-t5-11b). ## T5Config [[autodoc]] T5Config ## T5Tokenizer [[autodoc]] T5Tokenizer - build_inputs_with_special_tokens - get_special_tokens_mask - create_token_type_ids_from_sequences - save_vocabulary ## T5TokenizerFast [[autodoc]] T5TokenizerFast <frameworkcontent> <pt> ## T5Model [[autodoc]] T5Model - forward ## T5ForConditionalGeneration [[autodoc]] T5ForConditionalGeneration - forward ## T5EncoderModel [[autodoc]] T5EncoderModel - forward ## T5ForSequenceClassification [[autodoc]] T5ForSequenceClassification - forward ## T5ForTokenClassification [[autodoc]] T5ForTokenClassification - forward ## T5ForQuestionAnswering [[autodoc]] T5ForQuestionAnswering - forward </pt> <tf> ## TFT5Model [[autodoc]] TFT5Model - call ## TFT5ForConditionalGeneration [[autodoc]] TFT5ForConditionalGeneration - call ## TFT5EncoderModel [[autodoc]] TFT5EncoderModel - call </tf> <jax> ## FlaxT5Model [[autodoc]] FlaxT5Model - __call__ - encode - decode ## FlaxT5ForConditionalGeneration [[autodoc]] FlaxT5ForConditionalGeneration - __call__ - encode - decode ## FlaxT5EncoderModel [[autodoc]] FlaxT5EncoderModel - __call__ </jax> </frameworkcontent>

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# Video Vision Transformer (ViViT) ## Overview The Vivit model was proposed in [ViViT: A Video Vision Transformer](https://arxiv.org/abs/2103.15691) by Anurag Arnab, Mostafa Dehghani, Georg Heigold, Chen Sun, Mario Lučić, Cordelia Schmid. The paper proposes one of the first successful pure-transformer based set of models for video understanding. The abstract from the paper is the following: *We present pure-transformer based models for video classification, drawing upon the recent success of such models in image classification. Our model extracts spatio-temporal tokens from the input video, which are then encoded by a series of transformer layers. In order to handle the long sequences of tokens encountered in video, we propose several, efficient variants of our model which factorise the spatial- and temporal-dimensions of the input. Although transformer-based models are known to only be effective when large training datasets are available, we show how we can effectively regularise the model during training and leverage pretrained image models to be able to train on comparatively small datasets. We conduct thorough ablation studies, and achieve state-of-the-art results on multiple video classification benchmarks including Kinetics 400 and 600, Epic Kitchens, Something-Something v2 and Moments in Time, outperforming prior methods based on deep 3D convolutional networks.* This model was contributed by [jegormeister](https://huggingface.co/jegormeister). The original code (written in JAX) can be found [here](https://github.com/google-research/scenic/tree/main/scenic/projects/vivit). ## VivitConfig [[autodoc]] VivitConfig ## VivitImageProcessor [[autodoc]] VivitImageProcessor - preprocess ## VivitModel [[autodoc]] VivitModel - forward ## VivitForVideoClassification [[autodoc]] transformers.VivitForVideoClassification - forward

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# XLSR-Wav2Vec2 ## Overview The XLSR-Wav2Vec2 model was proposed in [Unsupervised Cross-Lingual Representation Learning For Speech Recognition](https://arxiv.org/abs/2006.13979) by Alexis Conneau, Alexei Baevski, Ronan Collobert, Abdelrahman Mohamed, Michael Auli. The abstract from the paper is the following: *This paper presents XLSR which learns cross-lingual speech representations by pretraining a single model from the raw waveform of speech in multiple languages. We build on wav2vec 2.0 which is trained by solving a contrastive task over masked latent speech representations and jointly learns a quantization of the latents shared across languages. The resulting model is fine-tuned on labeled data and experiments show that cross-lingual pretraining significantly outperforms monolingual pretraining. On the CommonVoice benchmark, XLSR shows a relative phoneme error rate reduction of 72% compared to the best known results. On BABEL, our approach improves word error rate by 16% relative compared to a comparable system. Our approach enables a single multilingual speech recognition model which is competitive to strong individual models. Analysis shows that the latent discrete speech representations are shared across languages with increased sharing for related languages. We hope to catalyze research in low-resource speech understanding by releasing XLSR-53, a large model pretrained in 53 languages.* The original code can be found [here](https://github.com/pytorch/fairseq/tree/master/fairseq/models/wav2vec). ## Usage tips - XLSR-Wav2Vec2 is a speech model that accepts a float array corresponding to the raw waveform of the speech signal. - XLSR-Wav2Vec2 model was trained using connectionist temporal classification (CTC) so the model output has to be decoded using [`Wav2Vec2CTCTokenizer`]. <Tip> XLSR-Wav2Vec2's architecture is based on the Wav2Vec2 model, so one can refer to [Wav2Vec2's documentation page](wav2vec2). </Tip>

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# Efficient Training on Multiple CPUs When training on a single CPU is too slow, we can use multiple CPUs. This guide focuses on PyTorch-based DDP enabling distributed CPU training efficiently on [bare metal](#usage-in-trainer) and [Kubernetes](#usage-with-kubernetes). ## Intel® oneCCL Bindings for PyTorch [Intel® oneCCL](https://github.com/oneapi-src/oneCCL) (collective communications library) is a library for efficient distributed deep learning training implementing such collectives like allreduce, allgather, alltoall. For more information on oneCCL, please refer to the [oneCCL documentation](https://spec.oneapi.com/versions/latest/elements/oneCCL/source/index.html) and [oneCCL specification](https://spec.oneapi.com/versions/latest/elements/oneCCL/source/index.html). Module `oneccl_bindings_for_pytorch` (`torch_ccl` before version 1.12) implements PyTorch C10D ProcessGroup API and can be dynamically loaded as external ProcessGroup and only works on Linux platform now Check more detailed information for [oneccl_bind_pt](https://github.com/intel/torch-ccl). ### Intel® oneCCL Bindings for PyTorch installation Wheel files are available for the following Python versions: | Extension Version | Python 3.6 | Python 3.7 | Python 3.8 | Python 3.9 | Python 3.10 | | :---------------: | :--------: | :--------: | :--------: | :--------: | :---------: | | 2.1.0 | | √ | √ | √ | √ | | 2.0.0 | | √ | √ | √ | √ | | 1.13.0 | | √ | √ | √ | √ | | 1.12.100 | | √ | √ | √ | √ | | 1.12.0 | | √ | √ | √ | √ | Please run `pip list | grep torch` to get your `pytorch_version`. ```bash pip install oneccl_bind_pt=={pytorch_version} -f https://developer.intel.com/ipex-whl-stable-cpu ``` where `{pytorch_version}` should be your PyTorch version, for instance 2.1.0. Check more approaches for [oneccl_bind_pt installation](https://github.com/intel/torch-ccl). Versions of oneCCL and PyTorch must match. <Tip warning={true}> oneccl_bindings_for_pytorch 1.12.0 prebuilt wheel does not work with PyTorch 1.12.1 (it is for PyTorch 1.12.0) PyTorch 1.12.1 should work with oneccl_bindings_for_pytorch 1.12.100 </Tip> ## Intel® MPI library Use this standards-based MPI implementation to deliver flexible, efficient, scalable cluster messaging on Intel® architecture. This component is part of the Intel® oneAPI HPC Toolkit. oneccl_bindings_for_pytorch is installed along with the MPI tool set. Need to source the environment before using it. for Intel® oneCCL >= 1.12.0 ```bash oneccl_bindings_for_pytorch_path=$(python -c "from oneccl_bindings_for_pytorch import cwd; print(cwd)") source $oneccl_bindings_for_pytorch_path/env/setvars.sh ``` for Intel® oneCCL whose version < 1.12.0 ```bash torch_ccl_path=$(python -c "import torch; import torch_ccl; import os; print(os.path.abspath(os.path.dirname(torch_ccl.__file__)))") source $torch_ccl_path/env/setvars.sh ``` #### Intel® Extension for PyTorch installation Intel Extension for PyTorch (IPEX) provides performance optimizations for CPU training with both Float32 and BFloat16 (refer to the [single CPU section](./perf_train_cpu) to learn more). The following "Usage in Trainer" takes mpirun in Intel® MPI library as an example. ## Usage in Trainer To enable multi CPU distributed training in the Trainer with the ccl backend, users should add **`--ddp_backend ccl`** in the command arguments. Let's see an example with the [question-answering example](https://github.com/huggingface/transformers/tree/main/examples/pytorch/question-answering) The following command enables training with 2 processes on one Xeon node, with one process running per one socket. The variables OMP_NUM_THREADS/CCL_WORKER_COUNT can be tuned for optimal performance. ```shell script export CCL_WORKER_COUNT=1 export MASTER_ADDR=127.0.0.1 mpirun -n 2 -genv OMP_NUM_THREADS=23 \ python3 run_qa.py \ --model_name_or_path google-bert/bert-large-uncased \ --dataset_name squad \ --do_train \ --do_eval \ --per_device_train_batch_size 12 \ --learning_rate 3e-5 \ --num_train_epochs 2 \ --max_seq_length 384 \ --doc_stride 128 \ --output_dir /tmp/debug_squad/ \ --no_cuda \ --ddp_backend ccl \ --use_ipex ``` The following command enables training with a total of four processes on two Xeons (node0 and node1, taking node0 as the main process), ppn (processes per node) is set to 2, with one process running per one socket. The variables OMP_NUM_THREADS/CCL_WORKER_COUNT can be tuned for optimal performance. In node0, you need to create a configuration file which contains the IP addresses of each node (for example hostfile) and pass that configuration file path as an argument. ```shell script cat hostfile xxx.xxx.xxx.xxx #node0 ip xxx.xxx.xxx.xxx #node1 ip ``` Now, run the following command in node0 and **4DDP** will be enabled in node0 and node1 with BF16 auto mixed precision: ```shell script export CCL_WORKER_COUNT=1 export MASTER_ADDR=xxx.xxx.xxx.xxx #node0 ip mpirun -f hostfile -n 4 -ppn 2 \ -genv OMP_NUM_THREADS=23 \ python3 run_qa.py \ --model_name_or_path google-bert/bert-large-uncased \ --dataset_name squad \ --do_train \ --do_eval \ --per_device_train_batch_size 12 \ --learning_rate 3e-5 \ --num_train_epochs 2 \ --max_seq_length 384 \ --doc_stride 128 \ --output_dir /tmp/debug_squad/ \ --no_cuda \ --ddp_backend ccl \ --use_ipex \ --bf16 ``` ## Usage with Kubernetes The same distributed training job from the previous section can be deployed to a Kubernetes cluster using the [Kubeflow PyTorchJob training operator](https://www.kubeflow.org/docs/components/training/pytorch/). ### Setup This example assumes that you have: * Access to a Kubernetes cluster with [Kubeflow installed](https://www.kubeflow.org/docs/started/installing-kubeflow/) * [`kubectl`](https://kubernetes.io/docs/tasks/tools/) installed and configured to access the Kubernetes cluster * A [Persistent Volume Claim (PVC)](https://kubernetes.io/docs/concepts/storage/persistent-volumes/) that can be used to store datasets and model files. There are multiple options for setting up the PVC including using an NFS [storage class](https://kubernetes.io/docs/concepts/storage/storage-classes/) or a cloud storage bucket. * A Docker container that includes your model training script and all the dependencies needed to run the script. For distributed CPU training jobs, this typically includes PyTorch, Transformers, Intel Extension for PyTorch, Intel oneCCL Bindings for PyTorch, and OpenSSH to communicate between the containers. The snippet below is an example of a Dockerfile that uses a base image that supports distributed CPU training and then extracts a Transformers release to the `/workspace` directory, so that the example scripts are included in the image: ```dockerfile FROM intel/ai-workflows:torch-2.0.1-huggingface-multinode-py3.9 WORKDIR /workspace # Download and extract the transformers code ARG HF_TRANSFORMERS_VER="4.35.2" RUN mkdir transformers && \ curl -sSL --retry 5 https://github.com/huggingface/transformers/archive/refs/tags/v${HF_TRANSFORMERS_VER}.tar.gz | tar -C transformers --strip-components=1 -xzf - ``` The image needs to be built and copied to the cluster's nodes or pushed to a container registry prior to deploying the PyTorchJob to the cluster. ### PyTorchJob Specification File The [Kubeflow PyTorchJob](https://www.kubeflow.org/docs/components/training/pytorch/) is used to run the distributed training job on the cluster. The yaml file for the PyTorchJob defines parameters such as: * The name of the PyTorchJob * The number of replicas (workers) * The python script and it's parameters that will be used to run the training job * The types of resources (node selector, memory, and CPU) needed for each worker * The image/tag for the Docker container to use * Environment variables * A volume mount for the PVC The volume mount defines a path where the PVC will be mounted in the container for each worker pod. This location can be used for the dataset, checkpoint files, and the saved model after training completes. The snippet below is an example of a yaml file for a PyTorchJob with 4 workers running the [question-answering example](https://github.com/huggingface/transformers/tree/main/examples/pytorch/question-answering). ```yaml apiVersion: "kubeflow.org/v1" kind: PyTorchJob metadata: name: transformers-pytorchjob namespace: kubeflow spec: elasticPolicy: rdzvBackend: c10d minReplicas: 1 maxReplicas: 4 maxRestarts: 10 pytorchReplicaSpecs: Worker: replicas: 4 # The number of worker pods restartPolicy: OnFailure template: spec: containers: - name: pytorch image: <image name>:<tag> # Specify the docker image to use for the worker pods imagePullPolicy: IfNotPresent command: - torchrun - /workspace/transformers/examples/pytorch/question-answering/run_qa.py - --model_name_or_path - "google-bert/bert-large-uncased" - --dataset_name - "squad" - --do_train - --do_eval - --per_device_train_batch_size - "12" - --learning_rate - "3e-5" - --num_train_epochs - "2" - --max_seq_length - "384" - --doc_stride - "128" - --output_dir - "/tmp/pvc-mount/output" - --no_cuda - --ddp_backend - "ccl" - --use_ipex - --bf16 # Specify --bf16 if your hardware supports bfloat16 env: - name: LD_PRELOAD value: "/usr/lib/x86_64-linux-gnu/libtcmalloc.so.4.5.9:/usr/local/lib/libiomp5.so" - name: TRANSFORMERS_CACHE value: "/tmp/pvc-mount/transformers_cache" - name: HF_DATASETS_CACHE value: "/tmp/pvc-mount/hf_datasets_cache" - name: LOGLEVEL value: "INFO" - name: CCL_WORKER_COUNT value: "1" - name: OMP_NUM_THREADS # Can be tuned for optimal performance - value: "56" resources: limits: cpu: 200 # Update the CPU and memory limit values based on your nodes memory: 128Gi requests: cpu: 200 # Update the CPU and memory request values based on your nodes memory: 128Gi volumeMounts: - name: pvc-volume mountPath: /tmp/pvc-mount - mountPath: /dev/shm name: dshm restartPolicy: Never nodeSelector: # Optionally use the node selector to specify what types of nodes to use for the workers node-type: spr volumes: - name: pvc-volume persistentVolumeClaim: claimName: transformers-pvc - name: dshm emptyDir: medium: Memory ``` To run this example, update the yaml based on your training script and the nodes in your cluster. <Tip> The CPU resource limits/requests in the yaml are defined in [cpu units](https://kubernetes.io/docs/concepts/configuration/manage-resources-containers/#meaning-of-cpu) where 1 CPU unit is equivalent to 1 physical CPU core or 1 virtual core (depending on whether the node is a physical host or a VM). The amount of CPU and memory limits/requests defined in the yaml should be less than the amount of available CPU/memory capacity on a single machine. It is usually a good idea to not use the entire machine's capacity in order to leave some resources for the kubelet and OS. In order to get ["guaranteed"](https://kubernetes.io/docs/concepts/workloads/pods/pod-qos/#guaranteed) [quality of service](https://kubernetes.io/docs/tasks/configure-pod-container/quality-service-pod/) for the worker pods, set the same CPU and memory amounts for both the resource limits and requests. </Tip> ### Deploy After the PyTorchJob spec has been updated with values appropriate for your cluster and training job, it can be deployed to the cluster using: ```bash kubectl create -f pytorchjob.yaml ``` The `kubectl get pods -n kubeflow` command can then be used to list the pods in the `kubeflow` namespace. You should see the worker pods for the PyTorchJob that was just deployed. At first, they will probably have a status of "Pending" as the containers get pulled and created, then the status should change to "Running". ``` NAME READY STATUS RESTARTS AGE ... transformers-pytorchjob-worker-0 1/1 Running 0 7m37s transformers-pytorchjob-worker-1 1/1 Running 0 7m37s transformers-pytorchjob-worker-2 1/1 Running 0 7m37s transformers-pytorchjob-worker-3 1/1 Running 0 7m37s ... ``` The logs for worker can be viewed using `kubectl logs -n kubeflow <pod name>`. Add `-f` to stream the logs, for example: ```bash kubectl logs -n kubeflow transformers-pytorchjob-worker-0 -f ``` After the training job completes, the trained model can be copied from the PVC or storage location. When you are done with the job, the PyTorchJob resource can be deleted from the cluster using `kubectl delete -f pytorchjob.yaml`. ## Summary This guide covered running distributed PyTorch training jobs using multiple CPUs on bare metal and on a Kubernetes cluster. Both cases utilize Intel Extension for PyTorch and Intel oneCCL Bindings for PyTorch for optimal training performance, and can be used as a template to run your own workload on multiple nodes.

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# Export to ONNX Deploying 🤗 Transformers models in production environments often requires, or can benefit from exporting the models into a serialized format that can be loaded and executed on specialized runtimes and hardware. 🤗 Optimum is an extension of Transformers that enables exporting models from PyTorch or TensorFlow to serialized formats such as ONNX and TFLite through its `exporters` module. 🤗 Optimum also provides a set of performance optimization tools to train and run models on targeted hardware with maximum efficiency. This guide demonstrates how you can export 🤗 Transformers models to ONNX with 🤗 Optimum, for the guide on exporting models to TFLite, please refer to the [Export to TFLite page](tflite). ## Export to ONNX [ONNX (Open Neural Network eXchange)](http://onnx.ai) is an open standard that defines a common set of operators and a common file format to represent deep learning models in a wide variety of frameworks, including PyTorch and TensorFlow. When a model is exported to the ONNX format, these operators are used to construct a computational graph (often called an _intermediate representation_) which represents the flow of data through the neural network. By exposing a graph with standardized operators and data types, ONNX makes it easy to switch between frameworks. For example, a model trained in PyTorch can be exported to ONNX format and then imported in TensorFlow (and vice versa). Once exported to ONNX format, a model can be: - optimized for inference via techniques such as [graph optimization](https://huggingface.co/docs/optimum/onnxruntime/usage_guides/optimization) and [quantization](https://huggingface.co/docs/optimum/onnxruntime/usage_guides/quantization). - run with ONNX Runtime via [`ORTModelForXXX` classes](https://huggingface.co/docs/optimum/onnxruntime/package_reference/modeling_ort), which follow the same `AutoModel` API as the one you are used to in 🤗 Transformers. - run with [optimized inference pipelines](https://huggingface.co/docs/optimum/main/en/onnxruntime/usage_guides/pipelines), which has the same API as the [`pipeline`] function in 🤗 Transformers. 🤗 Optimum provides support for the ONNX export by leveraging configuration objects. These configuration objects come ready-made for a number of model architectures, and are designed to be easily extendable to other architectures. For the list of ready-made configurations, please refer to [🤗 Optimum documentation](https://huggingface.co/docs/optimum/exporters/onnx/overview). There are two ways to export a 🤗 Transformers model to ONNX, here we show both: - export with 🤗 Optimum via CLI. - export with 🤗 Optimum with `optimum.onnxruntime`. ### Exporting a 🤗 Transformers model to ONNX with CLI To export a 🤗 Transformers model to ONNX, first install an extra dependency: ```bash pip install optimum[exporters] ``` To check out all available arguments, refer to the [🤗 Optimum docs](https://huggingface.co/docs/optimum/exporters/onnx/usage_guides/export_a_model#exporting-a-model-to-onnx-using-the-cli), or view help in command line: ```bash optimum-cli export onnx --help ``` To export a model's checkpoint from the 🤗 Hub, for example, `distilbert/distilbert-base-uncased-distilled-squad`, run the following command: ```bash optimum-cli export onnx --model distilbert/distilbert-base-uncased-distilled-squad distilbert_base_uncased_squad_onnx/ ``` You should see the logs indicating progress and showing where the resulting `model.onnx` is saved, like this: ```bash Validating ONNX model distilbert_base_uncased_squad_onnx/model.onnx... -[✓] ONNX model output names match reference model (start_logits, end_logits) - Validating ONNX Model output "start_logits": -[✓] (2, 16) matches (2, 16) -[✓] all values close (atol: 0.0001) - Validating ONNX Model output "end_logits": -[✓] (2, 16) matches (2, 16) -[✓] all values close (atol: 0.0001) The ONNX export succeeded and the exported model was saved at: distilbert_base_uncased_squad_onnx ``` The example above illustrates exporting a checkpoint from 🤗 Hub. When exporting a local model, first make sure that you saved both the model's weights and tokenizer files in the same directory (`local_path`). When using CLI, pass the `local_path` to the `model` argument instead of the checkpoint name on 🤗 Hub and provide the `--task` argument. You can review the list of supported tasks in the [🤗 Optimum documentation](https://huggingface.co/docs/optimum/exporters/task_manager). If `task` argument is not provided, it will default to the model architecture without any task specific head. ```bash optimum-cli export onnx --model local_path --task question-answering distilbert_base_uncased_squad_onnx/ ``` The resulting `model.onnx` file can then be run on one of the [many accelerators](https://onnx.ai/supported-tools.html#deployModel) that support the ONNX standard. For example, we can load and run the model with [ONNX Runtime](https://onnxruntime.ai/) as follows: ```python >>> from transformers import AutoTokenizer >>> from optimum.onnxruntime import ORTModelForQuestionAnswering >>> tokenizer = AutoTokenizer.from_pretrained("distilbert_base_uncased_squad_onnx") >>> model = ORTModelForQuestionAnswering.from_pretrained("distilbert_base_uncased_squad_onnx") >>> inputs = tokenizer("What am I using?", "Using DistilBERT with ONNX Runtime!", return_tensors="pt") >>> outputs = model(**inputs) ``` The process is identical for TensorFlow checkpoints on the Hub. For instance, here's how you would export a pure TensorFlow checkpoint from the [Keras organization](https://huggingface.co/keras-io): ```bash optimum-cli export onnx --model keras-io/transformers-qa distilbert_base_cased_squad_onnx/ ``` ### Exporting a 🤗 Transformers model to ONNX with `optimum.onnxruntime` Alternative to CLI, you can export a 🤗 Transformers model to ONNX programmatically like so: ```python >>> from optimum.onnxruntime import ORTModelForSequenceClassification >>> from transformers import AutoTokenizer >>> model_checkpoint = "distilbert_base_uncased_squad" >>> save_directory = "onnx/" >>> # Load a model from transformers and export it to ONNX >>> ort_model = ORTModelForSequenceClassification.from_pretrained(model_checkpoint, export=True) >>> tokenizer = AutoTokenizer.from_pretrained(model_checkpoint) >>> # Save the onnx model and tokenizer >>> ort_model.save_pretrained(save_directory) >>> tokenizer.save_pretrained(save_directory) ``` ### Exporting a model for an unsupported architecture If you wish to contribute by adding support for a model that cannot be currently exported, you should first check if it is supported in [`optimum.exporters.onnx`](https://huggingface.co/docs/optimum/exporters/onnx/overview), and if it is not, [contribute to 🤗 Optimum](https://huggingface.co/docs/optimum/exporters/onnx/usage_guides/contribute) directly. ### Exporting a model with `transformers.onnx` <Tip warning={true}> `tranformers.onnx` is no longer maintained, please export models with 🤗 Optimum as described above. This section will be removed in the future versions. </Tip> To export a 🤗 Transformers model to ONNX with `tranformers.onnx`, install extra dependencies: ```bash pip install transformers[onnx] ``` Use `transformers.onnx` package as a Python module to export a checkpoint using a ready-made configuration: ```bash python -m transformers.onnx --model=distilbert/distilbert-base-uncased onnx/ ``` This exports an ONNX graph of the checkpoint defined by the `--model` argument. Pass any checkpoint on the 🤗 Hub or one that's stored locally. The resulting `model.onnx` file can then be run on one of the many accelerators that support the ONNX standard. For example, load and run the model with ONNX Runtime as follows: ```python >>> from transformers import AutoTokenizer >>> from onnxruntime import InferenceSession >>> tokenizer = AutoTokenizer.from_pretrained("distilbert/distilbert-base-uncased") >>> session = InferenceSession("onnx/model.onnx") >>> # ONNX Runtime expects NumPy arrays as input >>> inputs = tokenizer("Using DistilBERT with ONNX Runtime!", return_tensors="np") >>> outputs = session.run(output_names=["last_hidden_state"], input_feed=dict(inputs)) ``` The required output names (like `["last_hidden_state"]`) can be obtained by taking a look at the ONNX configuration of each model. For example, for DistilBERT we have: ```python >>> from transformers.models.distilbert import DistilBertConfig, DistilBertOnnxConfig >>> config = DistilBertConfig() >>> onnx_config = DistilBertOnnxConfig(config) >>> print(list(onnx_config.outputs.keys())) ["last_hidden_state"] ``` The process is identical for TensorFlow checkpoints on the Hub. For example, export a pure TensorFlow checkpoint like so: ```bash python -m transformers.onnx --model=keras-io/transformers-qa onnx/ ``` To export a model that's stored locally, save the model's weights and tokenizer files in the same directory (e.g. `local-pt-checkpoint`), then export it to ONNX by pointing the `--model` argument of the `transformers.onnx` package to the desired directory: ```bash python -m transformers.onnx --model=local-pt-checkpoint onnx/ ```

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# LLM prompting guide [[open-in-colab]] Large Language Models such as Falcon, LLaMA, etc. are pretrained transformer models initially trained to predict the next token given some input text. They typically have billions of parameters and have been trained on trillions of tokens for an extended period of time. As a result, these models become quite powerful and versatile, and you can use them to solve multiple NLP tasks out of the box by instructing the models with natural language prompts. Designing such prompts to ensure the optimal output is often called "prompt engineering". Prompt engineering is an iterative process that requires a fair amount of experimentation. Natural languages are much more flexible and expressive than programming languages, however, they can also introduce some ambiguity. At the same time, prompts in natural language are quite sensitive to changes. Even minor modifications in prompts can lead to wildly different outputs. While there is no exact recipe for creating prompts to match all cases, researchers have worked out a number of best practices that help to achieve optimal results more consistently. This guide covers the prompt engineering best practices to help you craft better LLM prompts and solve various NLP tasks. You'll learn: - [Basics of prompting](#basics-of-prompting) - [Best practices of LLM prompting](#best-practices-of-llm-prompting) - [Advanced prompting techniques: few-shot prompting and chain-of-thought](#advanced-prompting-techniques) - [When to fine-tune instead of prompting](#prompting-vs-fine-tuning) <Tip> Prompt engineering is only a part of the LLM output optimization process. Another essential component is choosing the optimal text generation strategy. You can customize how your LLM selects each of the subsequent tokens when generating the text without modifying any of the trainable parameters. By tweaking the text generation parameters, you can reduce repetition in the generated text and make it more coherent and human-sounding. Text generation strategies and parameters are out of scope for this guide, but you can learn more about these topics in the following guides: * [Generation with LLMs](../llm_tutorial) * [Text generation strategies](../generation_strategies) </Tip> ## Basics of prompting ### Types of models The majority of modern LLMs are decoder-only transformers. Some examples include: [LLaMA](../model_doc/llama), [Llama2](../model_doc/llama2), [Falcon](../model_doc/falcon), [GPT2](../model_doc/gpt2). However, you may encounter encoder-decoder transformer LLMs as well, for instance, [Flan-T5](../model_doc/flan-t5) and [BART](../model_doc/bart). Encoder-decoder-style models are typically used in generative tasks where the output **heavily** relies on the input, for example, in translation and summarization. The decoder-only models are used for all other types of generative tasks. When using a pipeline to generate text with an LLM, it's important to know what type of LLM you are using, because they use different pipelines. Run inference with decoder-only models with the `text-generation` pipeline: ```python >>> from transformers import pipeline >>> import torch >>> torch.manual_seed(0) # doctest: +IGNORE_RESULT >>> generator = pipeline('text-generation', model = 'openai-community/gpt2') >>> prompt = "Hello, I'm a language model" >>> generator(prompt, max_length = 30) [{'generated_text': "Hello, I'm a language model expert, so I'm a big believer in the concept that I know very well and then I try to look into"}] ``` To run inference with an encoder-decoder, use the `text2text-generation` pipeline: ```python >>> text2text_generator = pipeline("text2text-generation", model = 'google/flan-t5-base') >>> prompt = "Translate from English to French: I'm very happy to see you" >>> text2text_generator(prompt) [{'generated_text': 'Je suis très heureuse de vous rencontrer.'}] ``` ### Base vs instruct/chat models Most of the recent LLM checkpoints available on 🤗 Hub come in two versions: base and instruct (or chat). For example, [`tiiuae/falcon-7b`](https://huggingface.co/tiiuae/falcon-7b) and [`tiiuae/falcon-7b-instruct`](https://huggingface.co/tiiuae/falcon-7b-instruct). Base models are excellent at completing the text when given an initial prompt, however, they are not ideal for NLP tasks where they need to follow instructions, or for conversational use. This is where the instruct (chat) versions come in. These checkpoints are the result of further fine-tuning of the pre-trained base versions on instructions and conversational data. This additional fine-tuning makes them a better choice for many NLP tasks. Let's illustrate some simple prompts that you can use with [`tiiuae/falcon-7b-instruct`](https://huggingface.co/tiiuae/falcon-7b-instruct) to solve some common NLP tasks. ### NLP tasks First, let's set up the environment: ```bash pip install -q transformers accelerate ``` Next, let's load the model with the appropriate pipeline (`"text-generation"`): ```python >>> from transformers import pipeline, AutoTokenizer >>> import torch >>> torch.manual_seed(0) # doctest: +IGNORE_RESULT >>> model = "tiiuae/falcon-7b-instruct" >>> tokenizer = AutoTokenizer.from_pretrained(model) >>> pipe = pipeline( ... "text-generation", ... model=model, ... tokenizer=tokenizer, ... torch_dtype=torch.bfloat16, ... device_map="auto", ... ) ``` <Tip> Note that Falcon models were trained using the `bfloat16` datatype, so we recommend you use the same. This requires a recent version of CUDA and works best on modern cards. </Tip> Now that we have the model loaded via the pipeline, let's explore how you can use prompts to solve NLP tasks. #### Text classification One of the most common forms of text classification is sentiment analysis, which assigns a label like "positive", "negative", or "neutral" to a sequence of text. Let's write a prompt that instructs the model to classify a given text (a movie review). We'll start by giving the instruction, and then specifying the text to classify. Note that instead of leaving it at that, we're also adding the beginning of the response - `"Sentiment: "`: ```python >>> torch.manual_seed(0) # doctest: +IGNORE_RESULT >>> prompt = """Classify the text into neutral, negative or positive. ... Text: This movie is definitely one of my favorite movies of its kind. The interaction between respectable and morally strong characters is an ode to chivalry and the honor code amongst thieves and policemen. ... Sentiment: ... """ >>> sequences = pipe( ... prompt, ... max_new_tokens=10, ... ) >>> for seq in sequences: ... print(f"Result: {seq['generated_text']}") Result: Classify the text into neutral, negative or positive. Text: This movie is definitely one of my favorite movies of its kind. The interaction between respectable and morally strong characters is an ode to chivalry and the honor code amongst thieves and policemen. Sentiment: Positive ``` As a result, the output contains a classification label from the list we have provided in the instructions, and it is a correct one! <Tip> You may notice that in addition to the prompt, we pass a `max_new_tokens` parameter. It controls the number of tokens the model shall generate, and it is one of the many text generation parameters that you can learn about in [Text generation strategies](../generation_strategies) guide. </Tip> #### Named Entity Recognition Named Entity Recognition (NER) is a task of finding named entities in a piece of text, such as a person, location, or organization. Let's modify the instructions in the prompt to make the LLM perform this task. Here, let's also set `return_full_text = False` so that output doesn't contain the prompt: ```python >>> torch.manual_seed(1) # doctest: +IGNORE_RESULT >>> prompt = """Return a list of named entities in the text. ... Text: The Golden State Warriors are an American professional basketball team based in San Francisco. ... Named entities: ... """ >>> sequences = pipe( ... prompt, ... max_new_tokens=15, ... return_full_text = False, ... ) >>> for seq in sequences: ... print(f"{seq['generated_text']}") - Golden State Warriors - San Francisco ``` As you can see, the model correctly identified two named entities from the given text. #### Translation Another task LLMs can perform is translation. You can choose to use encoder-decoder models for this task, however, here, for the simplicity of the examples, we'll keep using Falcon-7b-instruct, which does a decent job. Once again, here's how you can write a basic prompt to instruct a model to translate a piece of text from English to Italian: ```python >>> torch.manual_seed(2) # doctest: +IGNORE_RESULT >>> prompt = """Translate the English text to Italian. ... Text: Sometimes, I've believed as many as six impossible things before breakfast. ... Translation: ... """ >>> sequences = pipe( ... prompt, ... max_new_tokens=20, ... do_sample=True, ... top_k=10, ... return_full_text = False, ... ) >>> for seq in sequences: ... print(f"{seq['generated_text']}") A volte, ho creduto a sei impossibili cose prima di colazione. ``` Here we've added a `do_sample=True` and `top_k=10` to allow the model to be a bit more flexible when generating output. #### Text summarization Similar to the translation, text summarization is another generative task where the output **heavily** relies on the input, and encoder-decoder models can be a better choice. However, decoder-style models can be used for this task as well. Previously, we have placed the instructions at the very beginning of the prompt. However, the very end of the prompt can also be a suitable location for instructions. Typically, it's better to place the instruction on one of the extreme ends. ```python >>> torch.manual_seed(3) # doctest: +IGNORE_RESULT >>> prompt = """Permaculture is a design process mimicking the diversity, functionality and resilience of natural ecosystems. The principles and practices are drawn from traditional ecological knowledge of indigenous cultures combined with modern scientific understanding and technological innovations. Permaculture design provides a framework helping individuals and communities develop innovative, creative and effective strategies for meeting basic needs while preparing for and mitigating the projected impacts of climate change. ... Write a summary of the above text. ... Summary: ... """ >>> sequences = pipe( ... prompt, ... max_new_tokens=30, ... do_sample=True, ... top_k=10, ... return_full_text = False, ... ) >>> for seq in sequences: ... print(f"{seq['generated_text']}") Permaculture is an ecological design mimicking natural ecosystems to meet basic needs and prepare for climate change. It is based on traditional knowledge and scientific understanding. ``` #### Question answering For question answering task we can structure the prompt into the following logical components: instructions, context, question, and the leading word or phrase (`"Answer:"`) to nudge the model to start generating the answer: ```python >>> torch.manual_seed(4) # doctest: +IGNORE_RESULT >>> prompt = """Answer the question using the context below. ... Context: Gazpacho is a cold soup and drink made of raw, blended vegetables. Most gazpacho includes stale bread, tomato, cucumbers, onion, bell peppers, garlic, olive oil, wine vinegar, water, and salt. Northern recipes often include cumin and/or pimentón (smoked sweet paprika). Traditionally, gazpacho was made by pounding the vegetables in a mortar with a pestle; this more laborious method is still sometimes used as it helps keep the gazpacho cool and avoids the foam and silky consistency of smoothie versions made in blenders or food processors. ... Question: What modern tool is used to make gazpacho? ... Answer: ... """ >>> sequences = pipe( ... prompt, ... max_new_tokens=10, ... do_sample=True, ... top_k=10, ... return_full_text = False, ... ) >>> for seq in sequences: ... print(f"Result: {seq['generated_text']}") Result: Modern tools are used, such as immersion blenders ``` #### Reasoning Reasoning is one of the most difficult tasks for LLMs, and achieving good results often requires applying advanced prompting techniques, like [Chain-of-though](#chain-of-thought). Let's try if we can make a model reason about a simple arithmetics task with a basic prompt: ```python >>> torch.manual_seed(5) # doctest: +IGNORE_RESULT >>> prompt = """There are 5 groups of students in the class. Each group has 4 students. How many students are there in the class?""" >>> sequences = pipe( ... prompt, ... max_new_tokens=30, ... do_sample=True, ... top_k=10, ... return_full_text = False, ... ) >>> for seq in sequences: ... print(f"Result: {seq['generated_text']}") Result: There are a total of 5 groups, so there are 5 x 4=20 students in the class. ``` Correct! Let's increase the complexity a little and see if we can still get away with a basic prompt: ```python >>> torch.manual_seed(6) # doctest: +IGNORE_RESULT >>> prompt = """I baked 15 muffins. I ate 2 muffins and gave 5 muffins to a neighbor. My partner then bought 6 more muffins and ate 2. How many muffins do we now have?""" >>> sequences = pipe( ... prompt, ... max_new_tokens=10, ... do_sample=True, ... top_k=10, ... return_full_text = False, ... ) >>> for seq in sequences: ... print(f"Result: {seq['generated_text']}") Result: The total number of muffins now is 21 ``` This is a wrong answer, it should be 12. In this case, this can be due to the prompt being too basic, or due to the choice of model, after all we've picked the smallest version of Falcon. Reasoning is difficult for models of all sizes, but larger models are likely to perform better. ## Best practices of LLM prompting In this section of the guide we have compiled a list of best practices that tend to improve the prompt results: * When choosing the model to work with, the latest and most capable models are likely to perform better. * Start with a simple and short prompt, and iterate from there. * Put the instructions at the beginning of the prompt, or at the very end. When working with large context, models apply various optimizations to prevent Attention complexity from scaling quadratically. This may make a model more attentive to the beginning or end of a prompt than the middle. * Clearly separate instructions from the text they apply to - more on this in the next section. * Be specific and descriptive about the task and the desired outcome - its format, length, style, language, etc. * Avoid ambiguous descriptions and instructions. * Favor instructions that say "what to do" instead of those that say "what not to do". * "Lead" the output in the right direction by writing the first word (or even begin the first sentence for the model). * Use advanced techniques like [Few-shot prompting](#few-shot-prompting) and [Chain-of-thought](#chain-of-thought) * Test your prompts with different models to assess their robustness. * Version and track the performance of your prompts. ## Advanced prompting techniques ### Few-shot prompting The basic prompts in the sections above are the examples of "zero-shot" prompts, meaning, the model has been given instructions and context, but no examples with solutions. LLMs that have been fine-tuned on instruction datasets, generally perform well on such "zero-shot" tasks. However, you may find that your task has more complexity or nuance, and, perhaps, you have some requirements for the output that the model doesn't catch on just from the instructions. In this case, you can try the technique called few-shot prompting. In few-shot prompting, we provide examples in the prompt giving the model more context to improve the performance. The examples condition the model to generate the output following the patterns in the examples. Here's an example: ```python >>> torch.manual_seed(0) # doctest: +IGNORE_RESULT >>> prompt = """Text: The first human went into space and orbited the Earth on April 12, 1961. ... Date: 04/12/1961 ... Text: The first-ever televised presidential debate in the United States took place on September 28, 1960, between presidential candidates John F. Kennedy and Richard Nixon. ... Date:""" >>> sequences = pipe( ... prompt, ... max_new_tokens=8, ... do_sample=True, ... top_k=10, ... ) >>> for seq in sequences: ... print(f"Result: {seq['generated_text']}") Result: Text: The first human went into space and orbited the Earth on April 12, 1961. Date: 04/12/1961 Text: The first-ever televised presidential debate in the United States took place on September 28, 1960, between presidential candidates John F. Kennedy and Richard Nixon. Date: 09/28/1960 ``` In the above code snippet we used a single example to demonstrate the desired output to the model, so this can be called a "one-shot" prompting. However, depending on the task complexity you may need to use more than one example. Limitations of the few-shot prompting technique: - While LLMs can pick up on the patterns in the examples, these technique doesn't work well on complex reasoning tasks - Few-shot prompting requires creating lengthy prompts. Prompts with large number of tokens can increase computation and latency. There's also a limit to the length of the prompts. - Sometimes when given a number of examples, models can learn patterns that you didn't intend them to learn, e.g. that the third movie review is always negative. ### Chain-of-thought Chain-of-thought (CoT) prompting is a technique that nudges a model to produce intermediate reasoning steps thus improving the results on complex reasoning tasks. There are two ways of steering a model to producing the reasoning steps: - few-shot prompting by illustrating examples with detailed answers to questions, showing the model how to work through a problem. - by instructing the model to reason by adding phrases like "Let's think step by step" or "Take a deep breath and work through the problem step by step." If we apply the CoT technique to the muffins example from the [reasoning section](#reasoning) and use a larger model, such as (`tiiuae/falcon-180B-chat`) which you can play with in the [HuggingChat](https://huggingface.co/chat/), we'll get a significant improvement on the reasoning result: ```text Let's go through this step-by-step: 1. You start with 15 muffins. 2. You eat 2 muffins, leaving you with 13 muffins. 3. You give 5 muffins to your neighbor, leaving you with 8 muffins. 4. Your partner buys 6 more muffins, bringing the total number of muffins to 14. 5. Your partner eats 2 muffins, leaving you with 12 muffins. Therefore, you now have 12 muffins. ``` ## Prompting vs fine-tuning You can achieve great results by optimizing your prompts, however, you may still ponder whether fine-tuning a model would work better for your case. Here are some scenarios when fine-tuning a smaller model may be a preferred option: - Your domain is wildly different from what LLMs were pre-trained on and extensive prompt optimization did not yield sufficient results. - You need your model to work well in a low-resource language. - You need the model to be trained on sensitive data that is under strict regulations. - You have to use a small model due to cost, privacy, infrastructure or other limitations. In all of the above examples, you will need to make sure that you either already have or can easily obtain a large enough domain-specific dataset at a reasonable cost to fine-tune a model. You will also need to have enough time and resources to fine-tune a model. If the above examples are not the case for you, optimizing prompts can prove to be more beneficial.

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# Summary of the tokenizers [[open-in-colab]] On this page, we will have a closer look at tokenization. <Youtube id="VFp38yj8h3A"/> As we saw in [the preprocessing tutorial](preprocessing), tokenizing a text is splitting it into words or subwords, which then are converted to ids through a look-up table. Converting words or subwords to ids is straightforward, so in this summary, we will focus on splitting a text into words or subwords (i.e. tokenizing a text). More specifically, we will look at the three main types of tokenizers used in 🤗 Transformers: [Byte-Pair Encoding (BPE)](#byte-pair-encoding), [WordPiece](#wordpiece), and [SentencePiece](#sentencepiece), and show examples of which tokenizer type is used by which model. Note that on each model page, you can look at the documentation of the associated tokenizer to know which tokenizer type was used by the pretrained model. For instance, if we look at [`BertTokenizer`], we can see that the model uses [WordPiece](#wordpiece). ## Introduction Splitting a text into smaller chunks is a task that is harder than it looks, and there are multiple ways of doing so. For instance, let's look at the sentence `"Don't you love 🤗 Transformers? We sure do."` <Youtube id="nhJxYji1aho"/> A simple way of tokenizing this text is to split it by spaces, which would give: ``` ["Don't", "you", "love", "🤗", "Transformers?", "We", "sure", "do."] ``` This is a sensible first step, but if we look at the tokens `"Transformers?"` and `"do."`, we notice that the punctuation is attached to the words `"Transformer"` and `"do"`, which is suboptimal. We should take the punctuation into account so that a model does not have to learn a different representation of a word and every possible punctuation symbol that could follow it, which would explode the number of representations the model has to learn. Taking punctuation into account, tokenizing our exemplary text would give: ``` ["Don", "'", "t", "you", "love", "🤗", "Transformers", "?", "We", "sure", "do", "."] ``` Better. However, it is disadvantageous, how the tokenization dealt with the word `"Don't"`. `"Don't"` stands for `"do not"`, so it would be better tokenized as `["Do", "n't"]`. This is where things start getting complicated, and part of the reason each model has its own tokenizer type. Depending on the rules we apply for tokenizing a text, a different tokenized output is generated for the same text. A pretrained model only performs properly if you feed it an input that was tokenized with the same rules that were used to tokenize its training data. [spaCy](https://spacy.io/) and [Moses](http://www.statmt.org/moses/?n=Development.GetStarted) are two popular rule-based tokenizers. Applying them on our example, *spaCy* and *Moses* would output something like: ``` ["Do", "n't", "you", "love", "🤗", "Transformers", "?", "We", "sure", "do", "."] ``` As can be seen space and punctuation tokenization, as well as rule-based tokenization, is used here. Space and punctuation tokenization and rule-based tokenization are both examples of word tokenization, which is loosely defined as splitting sentences into words. While it's the most intuitive way to split texts into smaller chunks, this tokenization method can lead to problems for massive text corpora. In this case, space and punctuation tokenization usually generates a very big vocabulary (the set of all unique words and tokens used). *E.g.*, [Transformer XL](model_doc/transformerxl) uses space and punctuation tokenization, resulting in a vocabulary size of 267,735! Such a big vocabulary size forces the model to have an enormous embedding matrix as the input and output layer, which causes both an increased memory and time complexity. In general, transformers models rarely have a vocabulary size greater than 50,000, especially if they are pretrained only on a single language. So if simple space and punctuation tokenization is unsatisfactory, why not simply tokenize on characters? <Youtube id="ssLq_EK2jLE"/> While character tokenization is very simple and would greatly reduce memory and time complexity it makes it much harder for the model to learn meaningful input representations. *E.g.* learning a meaningful context-independent representation for the letter `"t"` is much harder than learning a context-independent representation for the word `"today"`. Therefore, character tokenization is often accompanied by a loss of performance. So to get the best of both worlds, transformers models use a hybrid between word-level and character-level tokenization called **subword** tokenization. ## Subword tokenization <Youtube id="zHvTiHr506c"/> Subword tokenization algorithms rely on the principle that frequently used words should not be split into smaller subwords, but rare words should be decomposed into meaningful subwords. For instance `"annoyingly"` might be considered a rare word and could be decomposed into `"annoying"` and `"ly"`. Both `"annoying"` and `"ly"` as stand-alone subwords would appear more frequently while at the same time the meaning of `"annoyingly"` is kept by the composite meaning of `"annoying"` and `"ly"`. This is especially useful in agglutinative languages such as Turkish, where you can form (almost) arbitrarily long complex words by stringing together subwords. Subword tokenization allows the model to have a reasonable vocabulary size while being able to learn meaningful context-independent representations. In addition, subword tokenization enables the model to process words it has never seen before, by decomposing them into known subwords. For instance, the [`~transformers.BertTokenizer`] tokenizes `"I have a new GPU!"` as follows: ```py >>> from transformers import BertTokenizer >>> tokenizer = BertTokenizer.from_pretrained("google-bert/bert-base-uncased") >>> tokenizer.tokenize("I have a new GPU!") ["i", "have", "a", "new", "gp", "##u", "!"] ``` Because we are considering the uncased model, the sentence was lowercased first. We can see that the words `["i", "have", "a", "new"]` are present in the tokenizer's vocabulary, but the word `"gpu"` is not. Consequently, the tokenizer splits `"gpu"` into known subwords: `["gp" and "##u"]`. `"##"` means that the rest of the token should be attached to the previous one, without space (for decoding or reversal of the tokenization). As another example, [`~transformers.XLNetTokenizer`] tokenizes our previously exemplary text as follows: ```py >>> from transformers import XLNetTokenizer >>> tokenizer = XLNetTokenizer.from_pretrained("xlnet/xlnet-base-cased") >>> tokenizer.tokenize("Don't you love 🤗 Transformers? We sure do.") ["▁Don", "'", "t", "▁you", "▁love", "▁", "🤗", "▁", "Transform", "ers", "?", "▁We", "▁sure", "▁do", "."] ``` We'll get back to the meaning of those `"▁"` when we look at [SentencePiece](#sentencepiece). As one can see, the rare word `"Transformers"` has been split into the more frequent subwords `"Transform"` and `"ers"`. Let's now look at how the different subword tokenization algorithms work. Note that all of those tokenization algorithms rely on some form of training which is usually done on the corpus the corresponding model will be trained on. <a id='byte-pair-encoding'></a> ### Byte-Pair Encoding (BPE) Byte-Pair Encoding (BPE) was introduced in [Neural Machine Translation of Rare Words with Subword Units (Sennrich et al., 2015)](https://arxiv.org/abs/1508.07909). BPE relies on a pre-tokenizer that splits the training data into words. Pretokenization can be as simple as space tokenization, e.g. [GPT-2](model_doc/gpt2), [RoBERTa](model_doc/roberta). More advanced pre-tokenization include rule-based tokenization, e.g. [XLM](model_doc/xlm), [FlauBERT](model_doc/flaubert) which uses Moses for most languages, or [GPT](model_doc/gpt) which uses spaCy and ftfy, to count the frequency of each word in the training corpus. After pre-tokenization, a set of unique words has been created and the frequency with which each word occurred in the training data has been determined. Next, BPE creates a base vocabulary consisting of all symbols that occur in the set of unique words and learns merge rules to form a new symbol from two symbols of the base vocabulary. It does so until the vocabulary has attained the desired vocabulary size. Note that the desired vocabulary size is a hyperparameter to define before training the tokenizer. As an example, let's assume that after pre-tokenization, the following set of words including their frequency has been determined: ``` ("hug", 10), ("pug", 5), ("pun", 12), ("bun", 4), ("hugs", 5) ``` Consequently, the base vocabulary is `["b", "g", "h", "n", "p", "s", "u"]`. Splitting all words into symbols of the base vocabulary, we obtain: ``` ("h" "u" "g", 10), ("p" "u" "g", 5), ("p" "u" "n", 12), ("b" "u" "n", 4), ("h" "u" "g" "s", 5) ``` BPE then counts the frequency of each possible symbol pair and picks the symbol pair that occurs most frequently. In the example above `"h"` followed by `"u"` is present _10 + 5 = 15_ times (10 times in the 10 occurrences of `"hug"`, 5 times in the 5 occurrences of `"hugs"`). However, the most frequent symbol pair is `"u"` followed by `"g"`, occurring _10 + 5 + 5 = 20_ times in total. Thus, the first merge rule the tokenizer learns is to group all `"u"` symbols followed by a `"g"` symbol together. Next, `"ug"` is added to the vocabulary. The set of words then becomes ``` ("h" "ug", 10), ("p" "ug", 5), ("p" "u" "n", 12), ("b" "u" "n", 4), ("h" "ug" "s", 5) ``` BPE then identifies the next most common symbol pair. It's `"u"` followed by `"n"`, which occurs 16 times. `"u"`, `"n"` is merged to `"un"` and added to the vocabulary. The next most frequent symbol pair is `"h"` followed by `"ug"`, occurring 15 times. Again the pair is merged and `"hug"` can be added to the vocabulary. At this stage, the vocabulary is `["b", "g", "h", "n", "p", "s", "u", "ug", "un", "hug"]` and our set of unique words is represented as ``` ("hug", 10), ("p" "ug", 5), ("p" "un", 12), ("b" "un", 4), ("hug" "s", 5) ``` Assuming, that the Byte-Pair Encoding training would stop at this point, the learned merge rules would then be applied to new words (as long as those new words do not include symbols that were not in the base vocabulary). For instance, the word `"bug"` would be tokenized to `["b", "ug"]` but `"mug"` would be tokenized as `["<unk>", "ug"]` since the symbol `"m"` is not in the base vocabulary. In general, single letters such as `"m"` are not replaced by the `"<unk>"` symbol because the training data usually includes at least one occurrence of each letter, but it is likely to happen for very special characters like emojis. As mentioned earlier, the vocabulary size, *i.e.* the base vocabulary size + the number of merges, is a hyperparameter to choose. For instance [GPT](model_doc/gpt) has a vocabulary size of 40,478 since they have 478 base characters and chose to stop training after 40,000 merges. #### Byte-level BPE A base vocabulary that includes all possible base characters can be quite large if *e.g.* all unicode characters are considered as base characters. To have a better base vocabulary, [GPT-2](https://cdn.openai.com/better-language-models/language_models_are_unsupervised_multitask_learners.pdf) uses bytes as the base vocabulary, which is a clever trick to force the base vocabulary to be of size 256 while ensuring that every base character is included in the vocabulary. With some additional rules to deal with punctuation, the GPT2's tokenizer can tokenize every text without the need for the <unk> symbol. [GPT-2](model_doc/gpt) has a vocabulary size of 50,257, which corresponds to the 256 bytes base tokens, a special end-of-text token and the symbols learned with 50,000 merges. <a id='wordpiece'></a> ### WordPiece WordPiece is the subword tokenization algorithm used for [BERT](model_doc/bert), [DistilBERT](model_doc/distilbert), and [Electra](model_doc/electra). The algorithm was outlined in [Japanese and Korean Voice Search (Schuster et al., 2012)](https://static.googleusercontent.com/media/research.google.com/ja//pubs/archive/37842.pdf) and is very similar to BPE. WordPiece first initializes the vocabulary to include every character present in the training data and progressively learns a given number of merge rules. In contrast to BPE, WordPiece does not choose the most frequent symbol pair, but the one that maximizes the likelihood of the training data once added to the vocabulary. So what does this mean exactly? Referring to the previous example, maximizing the likelihood of the training data is equivalent to finding the symbol pair, whose probability divided by the probabilities of its first symbol followed by its second symbol is the greatest among all symbol pairs. *E.g.* `"u"`, followed by `"g"` would have only been merged if the probability of `"ug"` divided by `"u"`, `"g"` would have been greater than for any other symbol pair. Intuitively, WordPiece is slightly different to BPE in that it evaluates what it _loses_ by merging two symbols to ensure it's _worth it_. <a id='unigram'></a> ### Unigram Unigram is a subword tokenization algorithm introduced in [Subword Regularization: Improving Neural Network Translation Models with Multiple Subword Candidates (Kudo, 2018)](https://arxiv.org/pdf/1804.10959.pdf). In contrast to BPE or WordPiece, Unigram initializes its base vocabulary to a large number of symbols and progressively trims down each symbol to obtain a smaller vocabulary. The base vocabulary could for instance correspond to all pre-tokenized words and the most common substrings. Unigram is not used directly for any of the models in the transformers, but it's used in conjunction with [SentencePiece](#sentencepiece). At each training step, the Unigram algorithm defines a loss (often defined as the log-likelihood) over the training data given the current vocabulary and a unigram language model. Then, for each symbol in the vocabulary, the algorithm computes how much the overall loss would increase if the symbol was to be removed from the vocabulary. Unigram then removes p (with p usually being 10% or 20%) percent of the symbols whose loss increase is the lowest, *i.e.* those symbols that least affect the overall loss over the training data. This process is repeated until the vocabulary has reached the desired size. The Unigram algorithm always keeps the base characters so that any word can be tokenized. Because Unigram is not based on merge rules (in contrast to BPE and WordPiece), the algorithm has several ways of tokenizing new text after training. As an example, if a trained Unigram tokenizer exhibits the vocabulary: ``` ["b", "g", "h", "n", "p", "s", "u", "ug", "un", "hug"], ``` `"hugs"` could be tokenized both as `["hug", "s"]`, `["h", "ug", "s"]` or `["h", "u", "g", "s"]`. So which one to choose? Unigram saves the probability of each token in the training corpus on top of saving the vocabulary so that the probability of each possible tokenization can be computed after training. The algorithm simply picks the most likely tokenization in practice, but also offers the possibility to sample a possible tokenization according to their probabilities. Those probabilities are defined by the loss the tokenizer is trained on. Assuming that the training data consists of the words \$x_{1}, \dots, x_{N}\$ and that the set of all possible tokenizations for a word \$x_{i}\$ is defined as \$S(x_{i})\$, then the overall loss is defined as $$\mathcal{L} = -\sum_{i=1}^{N} \log \left ( \sum_{x \in S(x_{i})} p(x) \right )$$ <a id='sentencepiece'></a> ### SentencePiece All tokenization algorithms described so far have the same problem: It is assumed that the input text uses spaces to separate words. However, not all languages use spaces to separate words. One possible solution is to use language specific pre-tokenizers, *e.g.* [XLM](model_doc/xlm) uses a specific Chinese, Japanese, and Thai pre-tokenizer). To solve this problem more generally, [SentencePiece: A simple and language independent subword tokenizer and detokenizer for Neural Text Processing (Kudo et al., 2018)](https://arxiv.org/pdf/1808.06226.pdf) treats the input as a raw input stream, thus including the space in the set of characters to use. It then uses the BPE or unigram algorithm to construct the appropriate vocabulary. The [`XLNetTokenizer`] uses SentencePiece for example, which is also why in the example earlier the `"▁"` character was included in the vocabulary. Decoding with SentencePiece is very easy since all tokens can just be concatenated and `"▁"` is replaced by a space. All transformers models in the library that use SentencePiece use it in combination with unigram. Examples of models using SentencePiece are [ALBERT](model_doc/albert), [XLNet](model_doc/xlnet), [Marian](model_doc/marian), and [T5](model_doc/t5).

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# Debugging ## Debug de problemas de Network multi-GPU Cuando entrenas o infieres con `DistributedDataParallel` y varias GPUs, si encuentras problemas de intercomunicación entre procesos y/o nodos, puedes usar el siguiente script para diagnosticar problemas de red. ```bash wget https://raw.githubusercontent.com/huggingface/transformers/main/scripts/distributed/torch-distributed-gpu-test.py ``` Por ejemplo, para probar cómo interactúan 2 GPUs, haz lo siguiente: ```bash python -m torch.distributed.run --nproc_per_node 2 --nnodes 1 torch-distributed-gpu-test.py ``` Si ambos procesos pueden hablar entre sí y asignar la memoria de la GPU, cada uno imprimirá un status OK. Para más GPUs o nodos, ajusta los argumentos en el script. Encontrarás muchos más detalles dentro del script de diagnóstico e incluso una receta de cómo ejecutarlo en un entorno SLURM. Un nivel adicional de debug es agregar la variable de entorno `NCCL_DEBUG=INFO` de la siguiente manera: ```bash NCCL_DEBUG=INFO python -m torch.distributed.run --nproc_per_node 2 --nnodes 1 torch-distributed-gpu-test.py ``` Esto mostrará mucha información de debug relacionada con NCCL, que luego puedes buscar online si encuentras que reporta algún problema. O si no estás seguro de cómo interpretar el output, puedes compartir el archivo de log en un Issue. ## Detección de Underflow y Overflow <Tip> Esta función está disponible actualmente sólo para PyTorch. </Tip> <Tip> Para el entrenamiento multi-GPU, requiere DDP (`torch.distributed.launch`). </Tip> <Tip> Esta función puede utilizarse con cualquier modelo basado en `nn.Module`. </Tip> Si empiezas a obtener `loss=NaN` o el modelo muestra algún otro comportamiento anormal debido a `inf` o `nan` en activations o weights hay que descubrir dónde se produce el primer underflow o overflow y qué lo ha provocado. Por suerte puedes lograrlo fácilmente activando un módulo especial que hará la detección automáticamente. Si estás usando [`Trainer`], solo necesitas añadir: ```bash --debug underflow_overflow ``` a los argumentos normales de la línea de comandos, o pasar `debug="underflow_overflow"` al crear el objeto [`TrainingArguments`]. Si estás usando tu propio bucle de entrenamiento u otro Trainer puedes lograr lo mismo con: ```python from .debug_utils import DebugUnderflowOverflow debug_overflow = DebugUnderflowOverflow(model) ``` [`~debug_utils.DebugUnderflowOverflow`] inserta hooks en el modelo que inmediatamente después de cada forward testeará las variables de input y output y también los weights del módulo correspondiente. Tan pronto como se detecte `inf` o `nan` se detecta en al menos un elemento de las activations o weights, el programa afirmará e imprimirá un informe como este (esto fue capturado con `google/mt5-small` bajo fp16 mixed precision): ``` Detected inf/nan during batch_number=0 Last 21 forward frames: abs min abs max metadata encoder.block.1.layer.1.DenseReluDense.dropout Dropout 0.00e+00 2.57e+02 input[0] 0.00e+00 2.85e+02 output [...] encoder.block.2.layer.0 T5LayerSelfAttention 6.78e-04 3.15e+03 input[0] 2.65e-04 3.42e+03 output[0] None output[1] 2.25e-01 1.00e+04 output[2] encoder.block.2.layer.1.layer_norm T5LayerNorm 8.69e-02 4.18e-01 weight 2.65e-04 3.42e+03 input[0] 1.79e-06 4.65e+00 output encoder.block.2.layer.1.DenseReluDense.wi_0 Linear 2.17e-07 4.50e+00 weight 1.79e-06 4.65e+00 input[0] 2.68e-06 3.70e+01 output encoder.block.2.layer.1.DenseReluDense.wi_1 Linear 8.08e-07 2.66e+01 weight 1.79e-06 4.65e+00 input[0] 1.27e-04 2.37e+02 output encoder.block.2.layer.1.DenseReluDense.dropout Dropout 0.00e+00 8.76e+03 input[0] 0.00e+00 9.74e+03 output encoder.block.2.layer.1.DenseReluDense.wo Linear 1.01e-06 6.44e+00 weight 0.00e+00 9.74e+03 input[0] 3.18e-04 6.27e+04 output encoder.block.2.layer.1.DenseReluDense T5DenseGatedGeluDense 1.79e-06 4.65e+00 input[0] 3.18e-04 6.27e+04 output encoder.block.2.layer.1.dropout Dropout 3.18e-04 6.27e+04 input[0] 0.00e+00 inf output ``` El output del ejemplo se ha recortado en el centro por razones de brevedad. La segunda columna muestra el valor del elemento más grande en términos absolutos, por lo que si observas con detenimiento los últimos fotogramas, los inputs y outputs estaban en el rango de `1e4`. Así que cuando este entrenamiento se hizo con fp16 mixed precision, el último paso sufrió overflow (ya que bajo `fp16` el mayor número antes de `inf` es `64e3`). Para evitar overflows en `fp16` las activations deben permanecer muy por debajo de `1e4`, porque `1e4 * 1e4 = 1e8` por lo que cualquier matrix multiplication con grandes activations va a llevar a una condición de overflow numérico. Al principio del output puedes descubrir en qué número de batch se produjo el problema (aquí `Detected inf/nan during batch_number=0` significa que el problema se produjo en el primer batch). Cada frame del informe comienza declarando la entrada completamente calificada para el módulo correspondiente que este frame está reportando. Si nos fijamos sólo en este frame: ``` encoder.block.2.layer.1.layer_norm T5LayerNorm 8.69e-02 4.18e-01 weight 2.65e-04 3.42e+03 input[0] 1.79e-06 4.65e+00 output ``` Aquí, `encoder.block.2.layer.1.layer_norm` indica que era una layer norm para la primera capa, del segundo block del encoder. Y la call específica del `forward` es `T5LayerNorm`. Veamos los últimos frames de ese informe: ``` Detected inf/nan during batch_number=0 Last 21 forward frames: abs min abs max metadata [...] encoder.block.2.layer.1.DenseReluDense.wi_0 Linear 2.17e-07 4.50e+00 weight 1.79e-06 4.65e+00 input[0] 2.68e-06 3.70e+01 output encoder.block.2.layer.1.DenseReluDense.wi_1 Linear 8.08e-07 2.66e+01 weight 1.79e-06 4.65e+00 input[0] 1.27e-04 2.37e+02 output encoder.block.2.layer.1.DenseReluDense.wo Linear 1.01e-06 6.44e+00 weight 0.00e+00 9.74e+03 input[0] 3.18e-04 6.27e+04 output encoder.block.2.layer.1.DenseReluDense T5DenseGatedGeluDense 1.79e-06 4.65e+00 input[0] 3.18e-04 6.27e+04 output encoder.block.2.layer.1.dropout Dropout 3.18e-04 6.27e+04 input[0] 0.00e+00 inf output ``` El último frame informa para la función `Dropout.forward` con la primera entrada para el único input y la segunda para el único output. Puedes ver que fue llamada desde un atributo `dropout` dentro de la clase `DenseReluDense`. Podemos ver que ocurrió durante la primera capa, del segundo block, durante el primer batch. Por último, el mayor absoluto elementos de input fue `6.27e+04` y el mismo para el output fue `inf`. Puedes ver aquí, que `T5DenseGatedGeluDense.forward` resultó en output activations, cuyo valor máximo absoluto fue alrededor de 62.7K, que está muy cerca del límite máximo de fp16 de 64K. En el siguiente frame tenemos `Dropout`, el cual renormaliza los weights, después de poner a cero algunos de los elementos, lo que empuja el valor máximo absoluto a más de 64K, y obtenemos un overflow (`inf`). Como puedes ver son los frames anteriores los que tenemos que mirar cuando los números empiezan a ser muy grandes para números fp16. Combinemos el informe con el código de `models/t5/modeling_t5.py`: ```python class T5DenseGatedGeluDense(nn.Module): def __init__(self, config): super().__init__() self.wi_0 = nn.Linear(config.d_model, config.d_ff, bias=False) self.wi_1 = nn.Linear(config.d_model, config.d_ff, bias=False) self.wo = nn.Linear(config.d_ff, config.d_model, bias=False) self.dropout = nn.Dropout(config.dropout_rate) self.gelu_act = ACT2FN["gelu_new"] def forward(self, hidden_states): hidden_gelu = self.gelu_act(self.wi_0(hidden_states)) hidden_linear = self.wi_1(hidden_states) hidden_states = hidden_gelu * hidden_linear hidden_states = self.dropout(hidden_states) hidden_states = self.wo(hidden_states) return hidden_states ``` Ahora es fácil ver la call `dropout`, y también todas las calls anteriores. Dado que la detección se produce en un forward hook, estos informes se imprimen inmediatamente después de que cada `forward` responda. Volviendo al informe completo, para actuar sobre él y arreglar el problema, tenemos que subir unos cuantos frames donde los números empezaron a subir y probablemente cambiar al modo `fp32` aquí, para que los números no sufran overflow cuando se multipliquen o al sumarlos. Por supuesto, puede haber otras soluciones. Por ejemplo, podríamos desactivar `amp` temporalmente si está activado, después de mover el original `forward` dentro de un helper wrapper, así: ```python def _forward(self, hidden_states): hidden_gelu = self.gelu_act(self.wi_0(hidden_states)) hidden_linear = self.wi_1(hidden_states) hidden_states = hidden_gelu * hidden_linear hidden_states = self.dropout(hidden_states) hidden_states = self.wo(hidden_states) return hidden_states import torch def forward(self, hidden_states): if torch.is_autocast_enabled(): with torch.cuda.amp.autocast(enabled=False): return self._forward(hidden_states) else: return self._forward(hidden_states) ``` Como el detector automático sólo informa de los inputs y outputs de los frames completos, una vez que sepas dónde buscar, puedes analizar también las etapas intermedias de una función específica de `forward`. En este caso, puede utilizar la función función de ayuda `detect_overflow` para inyectar el detector donde quieras, por ejemplo: ```python from debug_utils import detect_overflow class T5LayerFF(nn.Module): [...] def forward(self, hidden_states): forwarded_states = self.layer_norm(hidden_states) detect_overflow(forwarded_states, "after layer_norm") forwarded_states = self.DenseReluDense(forwarded_states) detect_overflow(forwarded_states, "after DenseReluDense") return hidden_states + self.dropout(forwarded_states) ``` Puedes ver que hemos añadido 2 de estos y ahora se trackea si `inf` o `nan` para `forwarded_states` fue detectado en algún punto intermedio. De hecho, el detector ya informa de esto porque cada una de las llamadas en el ejemplo anterior es un `nn.Module`, pero digamos que si tuvieras algunos cálculos directos locales, así es como lo harías. Además, si estás instanciando el debugger en tu propio código, puedes ajustar el número de frames impresos de su valor por defecto, por ejemplo: ```python from .debug_utils import DebugUnderflowOverflow debug_overflow = DebugUnderflowOverflow(model, max_frames_to_save=100) ``` ### Rastreo de valores mínimos y máximos absolutos de batches específicos La misma clase de debugging se puede utilizar para el rastreo por batches con la función de detección de underflow/overflow desactivada. Digamos que quieres ver los valores mínimos y máximos absolutos de todos los ingredientes de cada call `forward` de un determinado batch, y sólo hacerlo para los batches 1 y 3. Entonces instancias esta clase como: ```python debug_overflow = DebugUnderflowOverflow(model, trace_batch_nums=[1, 3]) ``` Y ahora los batches 1 y 3 completos serán rastreados usando el mismo formato que el detector de underflow/overflow. Los batches son 0-index. Esto es muy útil si sabes que el programa empieza a comportarse mal después de un determinado número de batch, para que puedas avanzar rápidamente hasta esa área. Aquí hay un ejemplo de output recortado para tal configuración: ``` *** Starting batch number=1 *** abs min abs max metadata shared Embedding 1.01e-06 7.92e+02 weight 0.00e+00 2.47e+04 input[0] 5.36e-05 7.92e+02 output [...] decoder.dropout Dropout 1.60e-07 2.27e+01 input[0] 0.00e+00 2.52e+01 output decoder T5Stack not a tensor output lm_head Linear 1.01e-06 7.92e+02 weight 0.00e+00 1.11e+00 input[0] 6.06e-02 8.39e+01 output T5ForConditionalGeneration not a tensor output *** Starting batch number=3 *** abs min abs max metadata shared Embedding 1.01e-06 7.92e+02 weight 0.00e+00 2.78e+04 input[0] 5.36e-05 7.92e+02 output [...] ``` Aquí obtendrás un gran número de frames mostrados - tantos como forward calls haya en tu modelo, por lo que puede o no ser lo que quieras, pero a veces puede ser más fácil de usar para debug que un debugger normal. Por ejemplo, si un problema comienza a ocurrir en el batch 150. Entonces puedes mostrar las trazas de los batches 149 y 150 y comparar dónde los números empezaron a divergir. También puedes especificar el número de batch después del cual se debe detener el entrenamiento, con: ```python debug_overflow = DebugUnderflowOverflow(model, trace_batch_nums=[1, 3], abort_after_batch_num=3) ```

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# Installation Installez 🤗 Transformers pour n'importe quelle librairie d'apprentissage profond avec laquelle vous avez l'habitude de travaillez, configurez votre cache et configurez 🤗 Transformers pour un usage hors ligne (facultatif). 🤗 Transformers est testé avec Python 3.6+, PyTorch 1.1.0+, TensorFlow 2.0+ et Flax. Consulter les instructions d'installation ci-dessous pour la librairie d'apprentissage profond que vous utilisez: * Instructions d'installation pour [PyTorch](https://pytorch.org/get-started/locally/). * Instructions d'installation pour [TensorFlow 2.0](https://www.tensorflow.org/install/pip). * Instructions d'installation pour [Flax](https://flax.readthedocs.io/en/latest/). ## Installation avec pip Vous devriez installer 🤗 Transformers dans un [environnement virtuel](https://docs.python.org/3/library/venv.html). Si vous n'êtes pas à l'aise avec les environnements virtuels, consultez ce [guide](https://packaging.python.org/guides/installing-using-pip-and-virtual-environments/). Utiliser un environnement virtuel permet de facilement gérer différents projets et d'éviter des erreurs de compatibilité entre les différentes dépendances. Commencez par créer un environnement virtuel dans l'espace de travail de votre projet : ```bash python -m venv .env ``` Activez l'environnement virtuel. Sur Linux ou MacOs : ```bash source .env/bin/activate ``` Activez l'environnement virtuel sur Windows : ```bash .env/Scripts/activate ``` Maintenant, 🤗 Transformers peut être installé avec la commande suivante : ```bash pip install transformers ``` Pour une utilisation avec CPU seulement, 🤗 Transformers et la librairie d'apprentissage profond de votre choix peuvent être installés en une seule ligne. Par exemple, installez 🤗 Transformers et PyTorch avec la commande suivante : ```bash pip install 'transformers[torch]' ``` 🤗 Transformers et TensorFlow 2.0 : ```bash pip install 'transformers[tf-cpu]' ``` <Tip warning={true}> Pour les architectures mac M1 / ARM Vous devez installer les outils suivants avant d'installer TensorFLow 2.0 ```bash brew install cmake brew install pkg-config ``` </Tip> 🤗 Transformers et Flax : ```bash pip install 'transformers[flax]' ``` Vérifiez que 🤗 Transformers a bien été installé avec la commande suivante. La commande va télécharger un modèle pré-entraîné : ```bash python -c "from transformers import pipeline; print(pipeline('sentiment-analysis')('we love you'))" ``` Le label et score sont ensuite affichés : ```bash [{'label': 'POSITIVE', 'score': 0.9998704791069031}] ``` ## Installation depuis le code source Installez 🤗 Transformers depuis le code source avec la commande suivante : ```bash pip install git+https://github.com/huggingface/transformers ``` Cette commande installe la version depuis la branche `main` au lieu de la dernière version stable. La version de la branche `main` est utile pour avoir les derniers développements. Par exemple, si un bug a été résolu depuis la dernière version stable mais n'a pas encore été publié officiellement. Cependant, cela veut aussi dire que la version de la branche `main` n'est pas toujours stable. Nous nous efforçons de maintenir la version de la branche `main` opérationnelle, et la plupart des problèmes sont généralement résolus en l'espace de quelques heures ou d'un jour. Si vous recontrez un problème, n'hésitez pas à créer une [Issue](https://github.com/huggingface/transformers/issues) pour que l'on puisse trouver une solution au plus vite ! Vérifiez que 🤗 Transformers a bien été installé avec la commande suivante : ```bash python -c "from transformers import pipeline; print(pipeline('sentiment-analysis')('I love you'))" ``` ## Installation modifiable Vous aurez besoin d'une installation modifiable si vous le souhaitez : * Utiliser la version de la branche `main` du code source. * Contribuer à 🤗 Transformers et vouler tester vos modifications du code source. Clonez le projet et installez 🤗 Transformers avec les commandes suivantes : ```bash git clone https://github.com/huggingface/transformers.git cd transformers pip install -e . ``` Ces commandes créent des liens entre le dossier où le projet a été cloné et les chemins de vos librairies Python. Python regardera maintenant dans le dossier que vous avez cloné en plus des dossiers où sont installées vos autres librairies. Par exemple, si vos librairies Python sont installées dans `~/anaconda3/envs/main/lib/python3.7/site-packages/`, Python cherchera aussi dans le dossier où vous avez cloné : `~/transformers/`. <Tip warning={true}> Vous devez garder le dossier `transformers` si vous voulez continuer d'utiliser la librairie. </Tip> Maintenant, vous pouvez facilement mettre à jour votre clone avec la dernière version de 🤗 Transformers en utilisant la commande suivante : ```bash cd ~/transformers/ git pull ``` Votre environnement Python utilisera la version de la branche `main` lors de la prochaine exécution. ## Installation avec conda Installation via le canal `conda-forge` de conda : ```bash conda install conda-forge::transformers ``` ## Configuration du cache Les modèles pré-entraînés sont téléchargés et mis en cache localement dans le dossier suivant : `~/.cache/huggingface/hub`. C'est le dossier par défaut donné par la variable d'environnement `TRANSFORMERS_CACHE`. Sur Windows, le dossier par défaut est `C:\Users\nom_utilisateur\.cache\huggingface\hub`. Vous pouvez modifier les variables d'environnement indiquées ci-dessous - par ordre de priorité - pour spécifier un dossier de cache différent : 1. Variable d'environnement (par défaut) : `HUGGINGFACE_HUB_CACHE` ou `TRANSFORMERS_CACHE`. 2. Variable d'environnement : `HF_HOME`. 3. Variable d'environnement : `XDG_CACHE_HOME` + `/huggingface`. <Tip> 🤗 Transformers utilisera les variables d'environnement `PYTORCH_TRANSFORMERS_CACHE` ou `PYTORCH_PRETRAINED_BERT_CACHE` si vous utilisez une version précédente de cette librairie et avez défini ces variables d'environnement, sauf si vous spécifiez la variable d'environnement `TRANSFORMERS_CACHE`. </Tip> ## Mode hors ligne 🤗 Transformers peut fonctionner dans un environnement cloisonné ou hors ligne en n'utilisant que des fichiers locaux. Définissez la variable d'environnement `TRANSFORMERS_OFFLINE=1` pour activer ce mode. <Tip> Ajoutez [🤗 Datasets](https://huggingface.co/docs/datasets/) à votre processus d'entraînement hors ligne en définissant la variable d'environnement `HF_DATASETS_OFFLINE=1`. </Tip> ```bash HF_DATASETS_OFFLINE=1 TRANSFORMERS_OFFLINE=1 \ python examples/pytorch/translation/run_translation.py --model_name_or_path google-t5/t5-small --dataset_name wmt16 --dataset_config ro-en ... ``` Le script devrait maintenant s'exécuter sans rester en attente ou attendre une expiration, car il n'essaiera pas de télécharger des modèle sur le Hub. Vous pouvez aussi éviter de télécharger un modèle à chaque appel de la fonction [`~PreTrainedModel.from_pretrained`] en utilisant le paramètre [local_files_only]. Seuls les fichiers locaux sont chargés lorsque ce paramètre est activé (c.-à-d. `local_files_only=True`) : ```py from transformers import T5Model model = T5Model.from_pretrained("./path/to/local/directory", local_files_only=True) ``` ### Récupérer des modèles et des tokenizers pour une utilisation hors ligne Une autre option pour utiliser 🤗 Transformers hors ligne est de télécharger les fichiers à l'avance, puis d'utiliser les chemins locaux lorsque vous en avez besoin en mode hors ligne. Il existe trois façons de faire cela : * Téléchargez un fichier via l'interface utilisateur sur le [Model Hub](https://huggingface.co/models) en cliquant sur l'icône ↓. ![download-icon](https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/download-icon.png) * Utilisez les fonctions [`PreTrainedModel.from_pretrained`] et [`PreTrainedModel.save_pretrained`] : 1. Téléchargez vos fichiers à l'avance avec [`PreTrainedModel.from_pretrained`]: ```py >>> from transformers import AutoTokenizer, AutoModelForSeq2SeqLM >>> tokenizer = AutoTokenizer.from_pretrained("bigscience/T0_3B") >>> model = AutoModelForSeq2SeqLM.from_pretrained("bigscience/T0_3B") ``` 2. Sauvegardez les fichiers dans un dossier de votre choix avec [`PreTrainedModel.save_pretrained`]: ```py >>> tokenizer.save_pretrained("./your/path/bigscience_t0") >>> model.save_pretrained("./your/path/bigscience_t0") ``` 3. Maintenant, lorsque vous êtes hors ligne, rechargez vos fichiers avec [`PreTrainedModel.from_pretrained`] depuis le dossier où vous les avez sauvegardés : ```py >>> tokenizer = AutoTokenizer.from_pretrained("./your/path/bigscience_t0") >>> model = AutoModel.from_pretrained("./your/path/bigscience_t0") ``` * Téléchargez des fichiers de manière automatique avec la librairie [huggingface_hub](https://github.com/huggingface/huggingface_hub/tree/main/src/huggingface_hub) : 1. Installez la librairie `huggingface_hub` dans votre environnement virtuel : ```bash python -m pip install huggingface_hub ``` 2. Utilisez la fonction [`hf_hub_download`](https://huggingface.co/docs/hub/adding-a-library#download-files-from-the-hub) pour télécharger un fichier vers un chemin de votre choix. Par exemple, la commande suivante télécharge le fichier `config.json` du modèle [T0](https://huggingface.co/bigscience/T0_3B) vers le chemin de votre choix : ```py >>> from huggingface_hub import hf_hub_download >>> hf_hub_download(repo_id="bigscience/T0_3B", filename="config.json", cache_dir="./your/path/bigscience_t0") ``` Une fois que votre fichier est téléchargé et caché localement, spécifiez son chemin local pour le charger et l'utiliser : ```py >>> from transformers import AutoConfig >>> config = AutoConfig.from_pretrained("./your/path/bigscience_t0/config.json") ``` <Tip> Consultez la section [How to download files from the Hub (Comment télécharger des fichiers depuis le Hub)](https://huggingface.co/docs/hub/how-to-downstream) pour plus de détails sur le téléchargement de fichiers stockés sur le Hub. </Tip>

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# Preprocess [[open-in-colab]] Prima di poter usare i dati in un modello, bisogna processarli in un formato accettabile per quest'ultimo. Un modello non comprende il testo grezzo, le immagini o l'audio. Bisogna convertire questi input in numeri e assemblarli all'interno di tensori. In questa esercitazione, tu potrai: * Preprocessare dati testuali con un tokenizer. * Preprocessare immagini o dati audio con un estrattore di caratteristiche. * Preprocessare dati per attività multimodali mediante un processore. ## NLP <Youtube id="Yffk5aydLzg"/> Lo strumento principale per processare dati testuali è un [tokenizer](main_classes/tokenizer). Un tokenizer inizia separando il testo in *tokens* secondo una serie di regole. I tokens sono convertiti in numeri, questi vengono utilizzati per costruire i tensori di input del modello. Anche altri input addizionali se richiesti dal modello vengono aggiunti dal tokenizer. <Tip> Se stai pensando si utilizzare un modello preaddestrato, è importante utilizzare il tokenizer preaddestrato associato. Questo assicura che il testo sia separato allo stesso modo che nel corpus usato per l'addestramento, e venga usata la stessa mappatura tokens-to-index (solitamente indicato come il *vocabolario*) come nel preaddestramento. </Tip> Iniziamo subito caricando un tokenizer preaddestrato con la classe [`AutoTokenizer`]. Questo scarica il *vocabolario* usato quando il modello è stato preaddestrato. ### Tokenize Carica un tokenizer preaddestrato con [`AutoTokenizer.from_pretrained`]: ```py >>> from transformers import AutoTokenizer >>> tokenizer = AutoTokenizer.from_pretrained("google-bert/bert-base-cased") ``` Poi inserisci le tue frasi nel tokenizer: ```py >>> encoded_input = tokenizer("Do not meddle in the affairs of wizards, for they are subtle and quick to anger.") >>> print(encoded_input) {'input_ids': [101, 2079, 2025, 19960, 10362, 1999, 1996, 3821, 1997, 16657, 1010, 2005, 2027, 2024, 11259, 1998, 4248, 2000, 4963, 1012, 102], 'token_type_ids': [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0], 'attention_mask': [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]} ``` Il tokenizer restituisce un dizionario contenente tre oggetti importanti: * [input_ids](glossary#input-ids) sono gli indici che corrispondono ad ogni token nella frase. * [attention_mask](glossary#attention-mask) indicata se un token deve essere elaborato o no. * [token_type_ids](glossary#token-type-ids) identifica a quale sequenza appartiene un token se è presente più di una sequenza. Si possono decodificare gli `input_ids` per farsi restituire l'input originale: ```py >>> tokenizer.decode(encoded_input["input_ids"]) '[CLS] Do not meddle in the affairs of wizards, for they are subtle and quick to anger. [SEP]' ``` Come si può vedere, il tokenizer aggiunge due token speciali - `CLS` e `SEP` (classificatore e separatore) - alla frase. Non tutti i modelli hanno bisogno dei token speciali, ma se servono, il tokenizer li aggiungerà automaticamente. Se ci sono più frasi che vuoi processare, passale come una lista al tokenizer: ```py >>> batch_sentences = [ ... "But what about second breakfast?", ... "Don't think he knows about second breakfast, Pip.", ... "What about elevensies?", ... ] >>> encoded_inputs = tokenizer(batch_sentences) >>> print(encoded_inputs) {'input_ids': [[101, 1252, 1184, 1164, 1248, 6462, 136, 102], [101, 1790, 112, 189, 1341, 1119, 3520, 1164, 1248, 6462, 117, 21902, 1643, 119, 102], [101, 1327, 1164, 5450, 23434, 136, 102]], 'token_type_ids': [[0, 0, 0, 0, 0, 0, 0, 0], [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0], [0, 0, 0, 0, 0, 0, 0]], 'attention_mask': [[1, 1, 1, 1, 1, 1, 1, 1], [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1], [1, 1, 1, 1, 1, 1, 1]]} ``` ### Pad Questo è un argomento importante. Quando processi un insieme di frasi potrebbero non avere tutte la stessa lunghezza. Questo è un problema perchè i tensori, in input del modello, devono avere dimensioni uniformi. Il padding è una strategia per assicurarsi che i tensori siano rettangolari aggiungendo uno speciale *padding token* alle frasi più corte. Imposta il parametro `padding` a `True` per imbottire le frasi più corte nel gruppo in modo che combacino con la massima lunghezza presente: ```py >>> batch_sentences = [ ... "But what about second breakfast?", ... "Don't think he knows about second breakfast, Pip.", ... "What about elevensies?", ... ] >>> encoded_input = tokenizer(batch_sentences, padding=True) >>> print(encoded_input) {'input_ids': [[101, 1252, 1184, 1164, 1248, 6462, 136, 102, 0, 0, 0, 0, 0, 0, 0], [101, 1790, 112, 189, 1341, 1119, 3520, 1164, 1248, 6462, 117, 21902, 1643, 119, 102], [101, 1327, 1164, 5450, 23434, 136, 102, 0, 0, 0, 0, 0, 0, 0, 0]], 'token_type_ids': [[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0], [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0], [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]], 'attention_mask': [[1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0], [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1], [1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0]]} ``` Nota che il tokenizer aggiunge alle sequenze degli `0` perchè sono troppo corte! ### Truncation L'altra faccia della medaglia è che avolte le sequenze possono essere troppo lunghe per essere gestite dal modello. In questo caso, avrai bisogno di troncare la sequenza per avere una lunghezza minore. Imposta il parametro `truncation` a `True` per troncare una sequenza alla massima lunghezza accettata dal modello: ```py >>> batch_sentences = [ ... "But what about second breakfast?", ... "Don't think he knows about second breakfast, Pip.", ... "What about elevensies?", ... ] >>> encoded_input = tokenizer(batch_sentences, padding=True, truncation=True) >>> print(encoded_input) {'input_ids': [[101, 1252, 1184, 1164, 1248, 6462, 136, 102, 0, 0, 0, 0, 0, 0, 0], [101, 1790, 112, 189, 1341, 1119, 3520, 1164, 1248, 6462, 117, 21902, 1643, 119, 102], [101, 1327, 1164, 5450, 23434, 136, 102, 0, 0, 0, 0, 0, 0, 0, 0]], 'token_type_ids': [[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0], [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0], [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]], 'attention_mask': [[1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0], [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1], [1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0]]} ``` ### Costruire i tensori Infine, vuoi che il tokenizer restituisca i tensori prodotti dal modello. Imposta il parametro `return_tensors` su `pt` per PyTorch, o `tf` per TensorFlow: ```py >>> batch_sentences = [ ... "But what about second breakfast?", ... "Don't think he knows about second breakfast, Pip.", ... "What about elevensies?", ... ] >>> encoded_input = tokenizer(batch, padding=True, truncation=True, return_tensors="pt") >>> print(encoded_input) {'input_ids': tensor([[ 101, 153, 7719, 21490, 1122, 1114, 9582, 1623, 102], [ 101, 5226, 1122, 9649, 1199, 2610, 1236, 102, 0]]), 'token_type_ids': tensor([[0, 0, 0, 0, 0, 0, 0, 0, 0], [0, 0, 0, 0, 0, 0, 0, 0, 0]]), 'attention_mask': tensor([[1, 1, 1, 1, 1, 1, 1, 1, 1], [1, 1, 1, 1, 1, 1, 1, 1, 0]])} ===PT-TF-SPLIT=== >>> batch_sentences = [ ... "But what about second breakfast?", ... "Don't think he knows about second breakfast, Pip.", ... "What about elevensies?", ... ] >>> encoded_input = tokenizer(batch, padding=True, truncation=True, return_tensors="tf") >>> print(encoded_input) {'input_ids': <tf.Tensor: shape=(2, 9), dtype=int32, numpy= array([[ 101, 153, 7719, 21490, 1122, 1114, 9582, 1623, 102], [ 101, 5226, 1122, 9649, 1199, 2610, 1236, 102, 0]], dtype=int32)>, 'token_type_ids': <tf.Tensor: shape=(2, 9), dtype=int32, numpy= array([[0, 0, 0, 0, 0, 0, 0, 0, 0], [0, 0, 0, 0, 0, 0, 0, 0, 0]], dtype=int32)>, 'attention_mask': <tf.Tensor: shape=(2, 9), dtype=int32, numpy= array([[1, 1, 1, 1, 1, 1, 1, 1, 1], [1, 1, 1, 1, 1, 1, 1, 1, 0]], dtype=int32)>} ``` ## Audio Gli input audio sono processati in modo differente rispetto al testo, ma l'obiettivo rimane lo stesso: creare sequenze numeriche che il modello può capire. Un [estrattore di caratteristiche](main_classes/feature_extractor) è progettato con lo scopo preciso di estrarre caratteristiche da immagini o dati audio grezzi e convertirli in tensori. Prima di iniziare, installa 🤗 Datasets per caricare un dataset audio e sperimentare: ```bash pip install datasets ``` Carica il dataset [MInDS-14](https://huggingface.co/datasets/PolyAI/minds14) (vedi il 🤗 [Datasets tutorial](https://huggingface.co/docs/datasets/load_hub) per avere maggiori dettagli su come caricare un dataset): ```py >>> from datasets import load_dataset, Audio >>> dataset = load_dataset("PolyAI/minds14", name="en-US", split="train") ``` Accedi al primo elemento della colonna `audio` per dare uno sguardo all'input. Richiamando la colonna `audio` sarà caricato automaticamente e ricampionato il file audio: ```py >>> dataset[0]["audio"] {'array': array([ 0. , 0.00024414, -0.00024414, ..., -0.00024414, 0. , 0. ], dtype=float32), 'path': '/root/.cache/huggingface/datasets/downloads/extracted/f14948e0e84be638dd7943ac36518a4cf3324e8b7aa331c5ab11541518e9368c/en-US~JOINT_ACCOUNT/602ba55abb1e6d0fbce92065.wav', 'sampling_rate': 8000} ``` Questo restituisce tre oggetti: * `array` è il segnale vocale caricato - e potenzialmente ricampionato - come vettore 1D. * `path` il percorso del file audio. * `sampling_rate` si riferisce al numero di campioni del segnale vocale misurati al secondo. ### Ricampionamento Per questo tutorial, puoi usare il modello [Wav2Vec2](https://huggingface.co/facebook/wav2vec2-base). Come puoi vedere dalla model card, il modello Wav2Vec2 è preaddestrato su un campionamento vocale a 16kHz.È importante che la frequenza di campionamento dei tuoi dati audio combaci con la frequenza di campionamento del dataset usato per preaddestrare il modello. Se la frequenza di campionamento dei tuoi dati non è uguale dovrai ricampionare i tuoi dati audio. Per esempio, il dataset [MInDS-14](https://huggingface.co/datasets/PolyAI/minds14) ha una frequenza di campionamento di 8000kHz. Utilizzando il modello Wav2Vec2 su questo dataset, alzala a 16kHz: ```py >>> dataset = load_dataset("PolyAI/minds14", name="en-US", split="train") >>> dataset[0]["audio"] {'array': array([ 0. , 0.00024414, -0.00024414, ..., -0.00024414, 0. , 0. ], dtype=float32), 'path': '/root/.cache/huggingface/datasets/downloads/extracted/f14948e0e84be638dd7943ac36518a4cf3324e8b7aa331c5ab11541518e9368c/en-US~JOINT_ACCOUNT/602ba55abb1e6d0fbce92065.wav', 'sampling_rate': 8000} ``` 1. Usa il metodo di 🤗 Datasets' [`cast_column`](https://huggingface.co/docs/datasets/package_reference/main_classes#datasets.Dataset.cast_column) per alzare la frequenza di campionamento a 16kHz: ```py >>> dataset = dataset.cast_column("audio", Audio(sampling_rate=16_000)) ``` 2. Carica il file audio: ```py >>> dataset[0]["audio"] {'array': array([ 2.3443763e-05, 2.1729663e-04, 2.2145823e-04, ..., 3.8356509e-05, -7.3497440e-06, -2.1754686e-05], dtype=float32), 'path': '/root/.cache/huggingface/datasets/downloads/extracted/f14948e0e84be638dd7943ac36518a4cf3324e8b7aa331c5ab11541518e9368c/en-US~JOINT_ACCOUNT/602ba55abb1e6d0fbce92065.wav', 'sampling_rate': 16000} ``` Come puoi notare, la `sampling_rate` adesso è 16kHz! ### Feature extractor Il prossimo passo è caricare un estrattore di caratteristiche per normalizzare e fare padding sull'input. Quando applichiamo il padding sui dati testuali, uno `0` è aggiunto alle sequenze più brevi. La stessa idea si applica ai dati audio, l'estrattore di caratteristiche per gli audio aggiungerà uno `0` - interpretato come silenzio - agli `array`. Carica l'estrattore delle caratteristiche con [`AutoFeatureExtractor.from_pretrained`]: ```py >>> from transformers import AutoFeatureExtractor >>> feature_extractor = AutoFeatureExtractor.from_pretrained("facebook/wav2vec2-base") ``` Inserisci l' `array` audio nell'estrattore delle caratteristiche. Noi raccomandiamo sempre di aggiungere il parametro `sampling_rate` nell'estrattore delle caratteristiche per correggere meglio qualche errore, dovuto ai silenzi, che potrebbe verificarsi. ```py >>> audio_input = [dataset[0]["audio"]["array"]] >>> feature_extractor(audio_input, sampling_rate=16000) {'input_values': [array([ 3.8106556e-04, 2.7506407e-03, 2.8015103e-03, ..., 5.6335266e-04, 4.6588284e-06, -1.7142107e-04], dtype=float32)]} ``` ### Pad e truncate Come per il tokenizer, puoi applicare le operazioni padding o truncation per manipolare sequenze di variabili a lotti. Dai uno sguaro alla lunghezza delle sequenze di questi due campioni audio: ```py >>> dataset[0]["audio"]["array"].shape (173398,) >>> dataset[1]["audio"]["array"].shape (106496,) ``` Come puoi vedere, il primo campione ha una sequenza più lunga del secondo. Crea una funzione che preprocesserà il dataset. Specifica una lunghezza massima del campione, e l'estrattore di features si occuperà di riempire o troncare la sequenza per coincidervi: ```py >>> def preprocess_function(examples): ... audio_arrays = [x["array"] for x in examples["audio"]] ... inputs = feature_extractor( ... audio_arrays, ... sampling_rate=16000, ... padding=True, ... max_length=100000, ... truncation=True, ... ) ... return inputs ``` Applica la funzione ai primi esempi nel dataset: ```py >>> processed_dataset = preprocess_function(dataset[:5]) ``` Adesso guarda la lunghezza dei campioni elaborati: ```py >>> processed_dataset["input_values"][0].shape (100000,) >>> processed_dataset["input_values"][1].shape (100000,) ``` La lunghezza dei campioni adesso coincide con la massima lunghezza impostata nelle funzione. ## Vision Un estrattore di caratteristiche si può usare anche per processare immagini e per compiti di visione. Ancora una volta, l'obiettivo è convertire l'immagine grezza in un lotto di tensori come input. Carica il dataset [food101](https://huggingface.co/datasets/food101) per questa esercitazione. Usa il parametro `split` di 🤗 Datasets per caricare solo un piccolo campione dal dataset di addestramento poichè il set di dati è molto grande: ```py >>> from datasets import load_dataset >>> dataset = load_dataset("food101", split="train[:100]") ``` Secondo passo, dai uno sguardo alle immagini usando la caratteristica [`Image`](https://huggingface.co/docs/datasets/package_reference/main_classes.html?highlight=image#datasets.Image) di 🤗 Datasets: ```py >>> dataset[0]["image"] ``` ![vision-preprocess-tutorial.png](https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/vision-preprocess-tutorial.png) ### Feature extractor Carica l'estrattore di caratteristiche [`AutoFeatureExtractor.from_pretrained`]: ```py >>> from transformers import AutoFeatureExtractor >>> feature_extractor = AutoFeatureExtractor.from_pretrained("google/vit-base-patch16-224") ``` ### Data augmentation Per le attività di visione, è usuale aggiungere alcuni tipi di data augmentation alle immagini come parte del preprocessing. Puoi aggiungere augmentations con qualsiasi libreria che preferisci, ma in questa esercitazione, userai il modulo [`transforms`](https://pytorch.org/vision/stable/transforms.html) di torchvision. 1. Normalizza l'immagine e usa [`Compose`](https://pytorch.org/vision/master/generated/torchvision.transforms.Compose.html) per concatenare alcune trasformazioni - [`RandomResizedCrop`](https://pytorch.org/vision/main/generated/torchvision.transforms.RandomResizedCrop.html) e [`ColorJitter`](https://pytorch.org/vision/main/generated/torchvision.transforms.ColorJitter.html) - insieme: ```py >>> from torchvision.transforms import Compose, Normalize, RandomResizedCrop, ColorJitter, ToTensor >>> normalize = Normalize(mean=feature_extractor.image_mean, std=feature_extractor.image_std) >>> _transforms = Compose( ... [RandomResizedCrop(feature_extractor.size), ColorJitter(brightness=0.5, hue=0.5), ToTensor(), normalize] ... ) ``` 2. Il modello accetta [`pixel_values`](model_doc/visionencoderdecoder#transformers.VisionEncoderDecoderModel.forward.pixel_values) come input. Questo valore è generato dall'estrattore di caratteristiche. Crea una funzione che genera `pixel_values` dai transforms: ```py >>> def transforms(examples): ... examples["pixel_values"] = [_transforms(image.convert("RGB")) for image in examples["image"]] ... return examples ``` 3. Poi utilizza 🤗 Datasets [`set_transform`](https://huggingface.co/docs/datasets/process#format-transform)per applicare al volo la trasformazione: ```py >>> dataset.set_transform(transforms) ``` 4. Adesso quando accedi all'immagine, puoi notare che l'estrattore di caratteristiche ha aggiunto `pixel_values` allo schema di input: ```py >>> dataset[0]["image"] {'image': <PIL.JpegImagePlugin.JpegImageFile image mode=RGB size=384x512 at 0x7F1A7B0630D0>, 'label': 6, 'pixel_values': tensor([[[ 0.0353, 0.0745, 0.1216, ..., -0.9922, -0.9922, -0.9922], [-0.0196, 0.0667, 0.1294, ..., -0.9765, -0.9843, -0.9922], [ 0.0196, 0.0824, 0.1137, ..., -0.9765, -0.9686, -0.8667], ..., [ 0.0275, 0.0745, 0.0510, ..., -0.1137, -0.1216, -0.0824], [ 0.0667, 0.0824, 0.0667, ..., -0.0588, -0.0745, -0.0980], [ 0.0353, 0.0353, 0.0431, ..., -0.0039, -0.0039, -0.0588]], [[ 0.2078, 0.2471, 0.2863, ..., -0.9451, -0.9373, -0.9451], [ 0.1608, 0.2471, 0.3098, ..., -0.9373, -0.9451, -0.9373], [ 0.2078, 0.2706, 0.3020, ..., -0.9608, -0.9373, -0.8275], ..., [-0.0353, 0.0118, -0.0039, ..., -0.2392, -0.2471, -0.2078], [ 0.0196, 0.0353, 0.0196, ..., -0.1843, -0.2000, -0.2235], [-0.0118, -0.0039, -0.0039, ..., -0.0980, -0.0980, -0.1529]], [[ 0.3961, 0.4431, 0.4980, ..., -0.9216, -0.9137, -0.9216], [ 0.3569, 0.4510, 0.5216, ..., -0.9059, -0.9137, -0.9137], [ 0.4118, 0.4745, 0.5216, ..., -0.9137, -0.8902, -0.7804], ..., [-0.2314, -0.1922, -0.2078, ..., -0.4196, -0.4275, -0.3882], [-0.1843, -0.1686, -0.2000, ..., -0.3647, -0.3804, -0.4039], [-0.1922, -0.1922, -0.1922, ..., -0.2941, -0.2863, -0.3412]]])} ``` Di seguito come si vede l'immagine dopo la fase di preprocessing. Come ci si aspetterebbe dalle trasformazioni applicate, l'immagine è stata ritagliata in modo casuale e le proprietà del colore sono diverse. ```py >>> import numpy as np >>> import matplotlib.pyplot as plt >>> img = dataset[0]["pixel_values"] >>> plt.imshow(img.permute(1, 2, 0)) ``` ![preprocessed_image](https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/preprocessed_image.png) ## Multimodal Per attività multimodali userai una combinazione di tutto quello che hai imparato poco fa e applicherai le tue competenze alla comprensione automatica del parlato (Automatic Speech Recognition - ASR). Questo significa che avrai bisogno di: * Un estrattore delle caratteristiche per processare i dati audio. * Il Tokenizer per processare i testi. Ritorna sul datasere [LJ Speech](https://huggingface.co/datasets/lj_speech): ```py >>> from datasets import load_dataset >>> lj_speech = load_dataset("lj_speech", split="train") ``` Visto che sei interessato solo alle colonne `audio` e `text`, elimina tutte le altre: ```py >>> lj_speech = lj_speech.map(remove_columns=["file", "id", "normalized_text"]) ``` Adesso guarda le colonne `audio` e `text`: ```py >>> lj_speech[0]["audio"] {'array': array([-7.3242188e-04, -7.6293945e-04, -6.4086914e-04, ..., 7.3242188e-04, 2.1362305e-04, 6.1035156e-05], dtype=float32), 'path': '/root/.cache/huggingface/datasets/downloads/extracted/917ece08c95cf0c4115e45294e3cd0dee724a1165b7fc11798369308a465bd26/LJSpeech-1.1/wavs/LJ001-0001.wav', 'sampling_rate': 22050} >>> lj_speech[0]["text"] 'Printing, in the only sense with which we are at present concerned, differs from most if not from all the arts and crafts represented in the Exhibition' ``` Ricorda dalla sezione precedente sull'elaborazione dei dati audio, tu dovresti sempre [ricampionare](preprocessing#audio) la frequenza di campionamento dei tuoi dati audio per farla coincidere con quella del dataset usato dal modello preaddestrato: ```py >>> lj_speech = lj_speech.cast_column("audio", Audio(sampling_rate=16_000)) ``` ### Processor Un processor combina un estrattore di caratteristiche e un tokenizer. Carica un processor con [`AutoProcessor.from_pretrained`]: ```py >>> from transformers import AutoProcessor >>> processor = AutoProcessor.from_pretrained("facebook/wav2vec2-base-960h") ``` 1. Crea una funzione che processi i dati audio in `input_values`, e tokenizza il testo in `labels`. Questi sono i tuoi input per il modello: ```py >>> def prepare_dataset(example): ... audio = example["audio"] ... example.update(processor(audio=audio["array"], text=example["text"], sampling_rate=16000)) ... return example ``` 2. Applica la funzione `prepare_dataset` ad un campione: ```py >>> prepare_dataset(lj_speech[0]) ``` Nota che il processor ha aggiunto `input_values` e `labels`. La frequenza di campionamento è stata corretta riducendola a 16kHz. Fantastico, ora dovresti essere in grado di preelaborare i dati per qualsiasi modalità e persino di combinare modalità diverse! Nella prossima esercitazione, impareremo a mettere a punto un modello sui dati appena pre-elaborati.

transformers/docs/source/it/preprocessing.md/0

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# Create a custom architecture [`AutoClass`](model_doc/auto)は、モデルのアーキテクチャを自動的に推論し、事前学習済みの設定と重みをダウンロードします。一般的には、チェックポイントに依存しないコードを生成するために`AutoClass`を使用することをお勧めします。ただし、特定のモデルパラメータに対する制御をより詳細に行いたいユーザーは、いくつかの基本クラスからカスタム🤗 Transformersモデルを作成できます。これは、🤗 Transformersモデルを研究、トレーニング、または実験する興味があるユーザーに特に役立つかもしれません。このガイドでは、`AutoClass`を使用しないカスタムモデルの作成について詳しく説明します。次の方法を学びます： - モデルの設定をロードおよびカスタマイズする。 - モデルアーキテクチャを作成する。 - テキスト用の遅いトークナイザと高速トークナイザを作成する。 - ビジョンタスク用の画像プロセッサを作成する。 - オーディオタスク用の特徴抽出器を作成する。 - マルチモーダルタスク用のプロセッサを作成する。 ## Configuration [設定](main_classes/configuration)は、モデルの特定の属性を指します。各モデルの設定には異なる属性があります。たとえば、すべてのNLPモデルには、`hidden_size`、`num_attention_heads`、`num_hidden_layers`、および`vocab_size`属性が共通してあります。これらの属性は、モデルを構築するための注意ヘッドの数や隠れ層の数を指定します。 [DistilBERT](model_doc/distilbert)をより詳しく調べるために、[`DistilBertConfig`]にアクセスしてその属性を調べてみましょう： ```py >>> from transformers import DistilBertConfig >>> config = DistilBertConfig() >>> print(config) DistilBertConfig { "activation": "gelu", "attention_dropout": 0.1, "dim": 768, "dropout": 0.1, "hidden_dim": 3072, "initializer_range": 0.02, "max_position_embeddings": 512, "model_type": "distilbert", "n_heads": 12, "n_layers": 6, "pad_token_id": 0, "qa_dropout": 0.1, "seq_classif_dropout": 0.2, "sinusoidal_pos_embds": false, "transformers_version": "4.16.2", "vocab_size": 30522 } ``` [`DistilBertConfig`]は、基本の[`DistilBertModel`]を構築するために使用されるすべてのデフォルト属性を表示します。すべての属性はカスタマイズ可能で、実験のためのスペースを提供します。例えば、デフォルトのモデルをカスタマイズして以下のようなことができます： - `activation`パラメータで異なる活性化関数を試す。 - `attention_dropout`パラメータで注意確率の高いドロップアウト率を使用する。 ```py >>> my_config = DistilBertConfig(activation="relu", attention_dropout=0.4) >>> print(my_config) DistilBertConfig { "activation": "relu", "attention_dropout": 0.4, "dim": 768, "dropout": 0.1, "hidden_dim": 3072, "initializer_range": 0.02, "max_position_embeddings": 512, "model_type": "distilbert", "n_heads": 12, "n_layers": 6, "pad_token_id": 0, "qa_dropout": 0.1, "seq_classif_dropout": 0.2, "sinusoidal_pos_embds": false, "transformers_version": "4.16.2", "vocab_size": 30522 } ``` 事前学習済みモデルの属性は、[`~PretrainedConfig.from_pretrained`] 関数で変更できます： ```py >>> my_config = DistilBertConfig.from_pretrained("distilbert/distilbert-base-uncased", activation="relu", attention_dropout=0.4) ``` Once you are satisfied with your model configuration, you can save it with [`PretrainedConfig.save_pretrained`]. Your configuration file is stored as a JSON file in the specified save directory. ```py >>> my_config.save_pretrained(save_directory="./your_model_save_path") ``` 設定ファイルを再利用するには、[`~PretrainedConfig.from_pretrained`]を使用してそれをロードします： ```py >>> my_config = DistilBertConfig.from_pretrained("./your_model_save_path/config.json") ``` <Tip> カスタム構成ファイルを辞書として保存することも、カスタム構成属性とデフォルトの構成属性の違いだけを保存することもできます！詳細については[configuration](main_classes/configuration)のドキュメンテーションをご覧ください。 </Tip> ## Model 次のステップは、[モデル](main_classes/models)を作成することです。モデル（アーキテクチャとも緩く言われることがあります）は、各レイヤーが何をしているか、どの操作が行われているかを定義します。構成からの `num_hidden_layers` のような属性はアーキテクチャを定義するために使用されます。すべてのモデルは [`PreTrainedModel`] をベースクラスとし、入力埋め込みのリサイズやセルフアテンションヘッドのプルーニングなど、共通のメソッドがいくつかあります。さらに、すべてのモデルは [`torch.nn.Module`](https://pytorch.org/docs/stable/generated/torch.nn.Module.html)、[`tf.keras.Model`](https://www.tensorflow.org/api_docs/python/tf/keras/Model)、または [`flax.linen.Module`](https://flax.readthedocs.io/en/latest/api_reference/flax.linen/module.html) のいずれかのサブクラスでもあります。つまり、モデルはそれぞれのフレームワークの使用法と互換性があります。 <frameworkcontent> <pt> モデルにカスタム構成属性をロードします： ```py >>> from transformers import DistilBertModel >>> my_config = DistilBertConfig.from_pretrained("./your_model_save_path/config.json") >>> model = DistilBertModel(my_config) ``` これにより、事前トレーニング済みの重みではなくランダムな値を持つモデルが作成されます。これは、トレーニングが行われるまで、まだ有用なものとして使用することはできません。トレーニングはコストと時間がかかるプロセスです。通常、トレーニングに必要なリソースの一部しか使用せず、より速くより良い結果を得るために事前学習済みモデルを使用することが良いでしょう。 [`~PreTrainedModel.from_pretrained`]を使用して事前学習済みモデルを作成します： ```py >>> model = DistilBertModel.from_pretrained("distilbert/distilbert-base-uncased") ``` 事前学習済みの重みをロードする際、モデルが🤗 Transformersによって提供されている場合、デフォルトのモデル設定が自動的にロードされます。ただし、必要に応じてデフォルトのモデル設定属性の一部またはすべてを独自のもので置き換えることができます。 ```py >>> model = DistilBertModel.from_pretrained("distilbert/distilbert-base-uncased", config=my_config) ``` </pt> <tf> モデルにカスタム設定属性をロードしてください： ```py >>> from transformers import TFDistilBertModel >>> my_config = DistilBertConfig.from_pretrained("./your_model_save_path/my_config.json") >>> tf_model = TFDistilBertModel(my_config) ``` これにより、事前学習済みの重みではなくランダムな値を持つモデルが作成されます。このモデルを有用な目的にはまだ使用することはできません。トレーニングはコストがかかり、時間がかかるプロセスです。一般的には、トレーニングに必要なリソースの一部しか使用せずに、より速く優れた結果を得るために事前学習済みモデルを使用することが良いでしょう。 [`~TFPreTrainedModel.from_pretrained`]を使用して事前学習済みモデルを作成します： ```py >>> tf_model = TFDistilBertModel.from_pretrained("distilbert/distilbert-base-uncased") ``` 事前学習済みの重みをロードする際、モデルが🤗 Transformersによって提供されている場合、デフォルトのモデル構成が自動的にロードされます。ただし、必要であればデフォルトのモデル構成属性の一部またはすべてを独自のもので置き換えることもできます： ```py >>> tf_model = TFDistilBertModel.from_pretrained("distilbert/distilbert-base-uncased", config=my_config) ``` </tf> </frameworkcontent> ### Model heads この時点で、ベースのDistilBERTモデルがあり、これは隠れた状態を出力します。隠れた状態はモデルのヘッドへの入力として渡され、最終的な出力を生成します。🤗 Transformersは、モデルがそのタスクをサポートしている限り、各タスクに対応する異なるモデルヘッドを提供します（つまり、DistilBERTを翻訳のようなシーケンス対シーケンスタスクに使用することはできません）。 <frameworkcontent> <pt> たとえば、[`DistilBertForSequenceClassification`]は、シーケンス分類ヘッドを持つベースのDistilBERTモデルです。シーケンス分類ヘッドは、プールされた出力の上にある線形層です。 ```py >>> from transformers import DistilBertForSequenceClassification >>> model = DistilBertForSequenceClassification.from_pretrained("distilbert/distilbert-base-uncased") ``` 新しいタスクにこのチェックポイントを簡単に再利用するには、異なるモデルヘッドに切り替えます。質問応答タスクの場合、[`DistilBertForQuestionAnswering`] モデルヘッドを使用します。質問応答ヘッドはシーケンス分類ヘッドと類似していますが、隠れ状態の出力の上に線形層があります。 ```py >>> from transformers import DistilBertForQuestionAnswering >>> model = DistilBertForQuestionAnswering.from_pretrained("distilbert/distilbert-base-uncased") ``` </pt> <tf> 例えば、[`TFDistilBertForSequenceClassification`]は、シーケンス分類ヘッドを持つベースのDistilBERTモデルです。シーケンス分類ヘッドは、プールされた出力の上にある線形層です。 ```py >>> from transformers import TFDistilBertForSequenceClassification >>> tf_model = TFDistilBertForSequenceClassification.from_pretrained("distilbert/distilbert-base-uncased") ``` 別のタスクにこのチェックポイントを簡単に再利用することができ、異なるモデルヘッドに切り替えるだけです。質問応答タスクの場合、[`TFDistilBertForQuestionAnswering`]モデルヘッドを使用します。質問応答ヘッドはシーケンス分類ヘッドと似ていますが、隠れ状態の出力の上に線形層があるだけです。 ```py >>> from transformers import TFDistilBertForQuestionAnswering >>> tf_model = TFDistilBertForQuestionAnswering.from_pretrained("distilbert/distilbert-base-uncased") ``` </tf> </frameworkcontent> ## Tokenizer テキストデータをモデルで使用する前に必要な最後のベースクラスは、生のテキストをテンソルに変換するための[トークナイザ](main_classes/tokenizer)です。 🤗 Transformersで使用できる2つのタイプのトークナイザがあります： - [`PreTrainedTokenizer`]: トークナイザのPython実装です。 - [`PreTrainedTokenizerFast`]: Rustベースの[🤗 Tokenizer](https://huggingface.co/docs/tokenizers/python/latest/)ライブラリからのトークナイザです。このトークナイザのタイプは、そのRust実装により、特にバッチトークナイゼーション中に高速です。高速なトークナイザは、トークンを元の単語または文字にマッピングする*オフセットマッピング*などの追加メソッドも提供します。両方のトークナイザは、エンコードとデコード、新しいトークンの追加、特別なトークンの管理など、共通のメソッドをサポートしています。 <Tip warning={true}> すべてのモデルが高速なトークナイザをサポートしているわけではありません。モデルが高速なトークナイザをサポートしているかどうかを確認するには、この[表](index#supported-frameworks)をご覧ください。 </Tip> 独自のトークナイザをトレーニングした場合、*ボキャブラリー*ファイルからトークナイザを作成できます。 ```py >>> from transformers import DistilBertTokenizer >>> my_tokenizer = DistilBertTokenizer(vocab_file="my_vocab_file.txt", do_lower_case=False, padding_side="left") ``` カスタムトークナイザーから生成される語彙は、事前学習済みモデルのトークナイザーが生成する語彙とは異なることを覚えておくことは重要です。事前学習済みモデルを使用する場合は、事前学習済みモデルの語彙を使用する必要があります。そうしないと、入力が意味をなさなくなります。 [`DistilBertTokenizer`]クラスを使用して、事前学習済みモデルの語彙を持つトークナイザーを作成します: ```py >>> from transformers import DistilBertTokenizer >>> slow_tokenizer = DistilBertTokenizer.from_pretrained("distilbert/distilbert-base-uncased") ``` [`DistilBertTokenizerFast`]クラスを使用して高速なトークナイザを作成します： ```py >>> from transformers import DistilBertTokenizerFast >>> fast_tokenizer = DistilBertTokenizerFast.from_pretrained("distilbert/distilbert-base-uncased") ``` <Tip> デフォルトでは、[`AutoTokenizer`]は高速なトークナイザを読み込もうとします。`from_pretrained`内で`use_fast=False`を設定することで、この動作を無効にすることができます。 </Tip> ## Image Processor 画像プロセッサはビジョン入力を処理します。これは基本クラス [`~image_processing_utils.ImageProcessingMixin`] を継承しています。使用するには、使用しているモデルに関連付けられた画像プロセッサを作成します。たとえば、画像分類に[ViT](model_doc/vit)を使用する場合、デフォルトの [`ViTImageProcessor`] を作成します。 ```py >>> from transformers import ViTImageProcessor >>> vit_extractor = ViTImageProcessor() >>> print(vit_extractor) ViTImageProcessor { "do_normalize": true, "do_resize": true, "image_processor_type": "ViTImageProcessor", "image_mean": [ 0.5, 0.5, 0.5 ], "image_std": [ 0.5, 0.5, 0.5 ], "resample": 2, "size": 224 } ``` <Tip> カスタマイズを必要としない場合、モデルのデフォルトの画像プロセッサパラメータをロードするには、単純に`from_pretrained`メソッドを使用してください。 </Tip> [`ViTImageProcessor`]のパラメータを変更して、カスタムの画像プロセッサを作成できます： ```py >>> from transformers import ViTImageProcessor >>> my_vit_extractor = ViTImageProcessor(resample="PIL.Image.BOX", do_normalize=False, image_mean=[0.3, 0.3, 0.3]) >>> print(my_vit_extractor) ViTImageProcessor { "do_normalize": false, "do_resize": true, "image_processor_type": "ViTImageProcessor", "image_mean": [ 0.3, 0.3, 0.3 ], "image_std": [ 0.5, 0.5, 0.5 ], "resample": "PIL.Image.BOX", "size": 224 } ``` ## Feature Extractor フィーチャー抽出器は音声入力を処理します。これは基本的な [`~feature_extraction_utils.FeatureExtractionMixin`] クラスから継承され、音声入力を処理するための [`SequenceFeatureExtractor`] クラスからも継承されることがあります。使用するには、モデルに関連付けられたフィーチャー抽出器を作成します。たとえば、音声分類に [Wav2Vec2](model_doc/wav2vec2) を使用する場合、デフォルトの [`Wav2Vec2FeatureExtractor`] を作成します。 ```py >>> from transformers import Wav2Vec2FeatureExtractor >>> w2v2_extractor = Wav2Vec2FeatureExtractor() >>> print(w2v2_extractor) Wav2Vec2FeatureExtractor { "do_normalize": true, "feature_extractor_type": "Wav2Vec2FeatureExtractor", "feature_size": 1, "padding_side": "right", "padding_value": 0.0, "return_attention_mask": false, "sampling_rate": 16000 } ``` <Tip> カスタマイズを行わない場合、モデルのデフォルトの特徴抽出器パラメーターをロードするには、単に `from_pretrained` メソッドを使用してください。 </Tip> [`Wav2Vec2FeatureExtractor`] のパラメーターを変更して、カスタム特徴抽出器を作成できます: ```py >>> from transformers import Wav2Vec2FeatureExtractor >>> w2v2_extractor = Wav2Vec2FeatureExtractor(sampling_rate=8000, do_normalize=False) >>> print(w2v2_extractor) Wav2Vec2FeatureExtractor { "do_normalize": false, "feature_extractor_type": "Wav2Vec2FeatureExtractor", "feature_size": 1, "padding_side": "right", "padding_value": 0.0, "return_attention_mask": false, "sampling_rate": 8000 } ``` ## Processor マルチモーダルタスクをサポートするモデルに対して、🤗 Transformersは便利なプロセッサクラスを提供しています。このプロセッサクラスは、特徴量抽出器やトークナイザなどの処理クラスを便利にラップし、単一のオブジェクトに結合します。たとえば、自動音声認識タスク（ASR）用に[`Wav2Vec2Processor`]を使用してみましょう。 ASRは音声をテキストに転写するタスクであり、音声入力を処理するために特徴量抽出器とトークナイザが必要です。音声入力を処理する特徴量抽出器を作成します： ```py >>> from transformers import Wav2Vec2FeatureExtractor >>> feature_extractor = Wav2Vec2FeatureExtractor(padding_value=1.0, do_normalize=True) ``` テキスト入力を処理するトークナイザを作成します: ```py >>> from transformers import Wav2Vec2CTCTokenizer >>> tokenizer = Wav2Vec2CTCTokenizer(vocab_file="my_vocab_file.txt") ``` [`Wav2Vec2Processor`]で特徴量抽出器とトークナイザを組み合わせます： ```py >>> from transformers import Wav2Vec2Processor >>> processor = Wav2Vec2Processor(feature_extractor=feature_extractor, tokenizer=tokenizer) ``` 二つの基本クラス - 設定とモデル - および追加の前処理クラス（トークナイザ、画像プロセッサ、特徴抽出器、またはプロセッサ）を使用することで、🤗 Transformers がサポートするモデルのいずれかを作成できます。これらの基本クラスは設定可能で、必要な特性を使用できます。モデルをトレーニング用に簡単にセットアップしたり、既存の事前学習済みモデルを微調整することができます。

transformers/docs/source/ja/create_a_model.md/0

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# BEiT ## Overview BEiT モデルは、[BEiT: BERT Pre-Training of Image Transformers](https://arxiv.org/abs/2106.08254) で提案されました。ハンボ・バオ、リー・ドン、フル・ウェイ。 BERT に触発された BEiT は、自己教師ありの事前トレーニングを作成した最初の論文です。ビジョントランスフォーマー (ViT) は、教師付き事前トレーニングよりも優れたパフォーマンスを発揮します。クラスを予測するためにモデルを事前トレーニングするのではなく ([オリジナルの ViT 論文](https://arxiv.org/abs/2010.11929) で行われたように) 画像の BEiT モデルは、次のように事前トレーニングされています。マスクされた OpenAI の [DALL-E モデル](https://arxiv.org/abs/2102.12092) のコードブックからビジュアルトークンを予測しますパッチ。論文の要約は次のとおりです。 *自己教師あり視覚表現モデル BEiT (Bidirectional Encoderpresentation) を導入します。イメージトランスフォーマーより。自然言語処理分野で開発されたBERTに倣い、マスク画像を提案します。ビジョントランスフォーマーを事前にトレーニングするためのモデリングタスク。具体的には、事前トレーニングでは各画像に 2 つのビューがあります。パッチ (16x16 ピクセルなど)、およびビジュアルトークン (つまり、個別のトークン)。まず、元の画像を「トークン化」して、ビジュアルトークン。次に、いくつかの画像パッチをランダムにマスクし、それらをバックボーンの Transformer に供給します。事前トレーニング目的は、破損したイメージパッチに基づいて元のビジュアルトークンを回復することです。 BEiTの事前トレーニング後、事前トレーニングされたエンコーダーにタスクレイヤーを追加することで、ダウンストリームタスクのモデルパラメーターを直接微調整します。画像分類とセマンティックセグメンテーションに関する実験結果は、私たちのモデルが競争力のある結果を達成することを示しています以前の事前トレーニング方法を使用して。たとえば、基本サイズの BEiT は、ImageNet-1K で 83.2% のトップ 1 精度を達成します。同じ設定でゼロからの DeiT トレーニング (81.8%) を大幅に上回りました。また、大型BEiTは 86.3% は ImageNet-1K のみを使用しており、ImageNet-22K での教師付き事前トレーニングを使用した ViT-L (85.2%) を上回っています。* ## Usage tips - BEiT モデルは通常のビジョントランスフォーマーですが、教師ありではなく自己教師ありの方法で事前トレーニングされています。彼らは ImageNet-1K および CIFAR-100 で微調整すると、[オリジナルモデル (ViT)](vit) と [データ効率の高いイメージトランスフォーマー (DeiT)](deit) の両方を上回るパフォーマンスを発揮します。推論に関するデモノートブックもチェックできます。カスタムデータの微調整は [こちら](https://github.com/NielsRogge/Transformers-Tutorials/tree/master/VisionTransformer) (置き換えるだけで済みます) [`BeitImageProcessor`] による [`ViTFeatureExtractor`] と [`ViTForImageClassification`] by [`BeitForImageClassification`])。 - DALL-E の画像トークナイザーと BEiT を組み合わせる方法を紹介するデモノートブックも利用可能です。マスクされた画像モデリングを実行します。 [ここ](https://github.com/NielsRogge/Transformers-Tutorials/tree/master/BEiT) で見つけることができます。 - BEiT モデルは各画像が同じサイズ (解像度) であることを期待しているため、次のように使用できます。 [`BeitImageProcessor`] を使用して、モデルの画像のサイズを変更 (または再スケール) し、正規化します。 - 事前トレーニングまたは微調整中に使用されるパッチ解像度と画像解像度の両方が名前に反映されます。各チェックポイント。たとえば、`microsoft/beit-base-patch16-224`は、パッチ付きの基本サイズのアーキテクチャを指します。解像度は 16x16、微調整解像度は 224x224 です。すべてのチェックポイントは [ハブ](https://huggingface.co/models?search=microsoft/beit) で見つけることができます。 - 利用可能なチェックポイントは、(1) [ImageNet-22k](http://www.image-net.org/) で事前トレーニングされています ( 1,400 万の画像と 22,000 のクラス) のみ、(2) ImageNet-22k でも微調整、または (3) [ImageNet-1k](http://www.image-net.org/challenges/LSVRC)でも微調整/2012/) (ILSVRC 2012 とも呼ばれ、130 万件のコレクション) 画像と 1,000 クラス)。 - BEiT は、T5 モデルからインスピレーションを得た相対位置埋め込みを使用します。事前トレーニング中に、著者は次のことを共有しました。いくつかの自己注意層間の相対的な位置の偏り。微調整中、各レイヤーの相対位置バイアスは、事前トレーニング後に取得された共有相対位置バイアスで初期化されます。ご希望の場合は、モデルを最初から事前トレーニングするには、`use_relative_position_bias` または追加するには、[`BeitConfig`] の `use_relative_position_bias` 属性を `True` に設定します。位置の埋め込み。 <img src="https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/transformers/model_doc/beit_architecture.jpg" alt="drawing" width="600"/> <small> BEiT の事前トレーニング。 <a href="https://arxiv.org/abs/2106.08254">元の論文から抜粋。</a> </small> このモデルは、[nielsr](https://huggingface.co/nielsr) によって提供されました。このモデルの JAX/FLAX バージョンは、 [kamalkraj](https://huggingface.co/kamalkraj) による投稿。元のコードは [ここ](https://github.com/microsoft/unilm/tree/master/beit) にあります。 ## Resources BEiT の使用を開始するのに役立つ公式 Hugging Face およびコミュニティ (🌎 で示されている) リソースのリスト。 <PipelineTag pipeline="image-classification"/> - [`BeitForImageClassification`] は、この [サンプルスクリプト](https://github.com/huggingface/transformers/tree/main/examples/pytorch/image-classification) および [ノートブック](https://colab.research.google.com/github/huggingface/notebooks/blob/main/examples/image_classification.ipynb)。 - 参照: [画像分類タスクガイド](../tasks/image_classification) **セマンティックセグメンテーション** - [セマンティックセグメンテーションタスクガイド](../tasks/semantic_segmentation) ここに含めるリソースの送信に興味がある場合は、お気軽にプルリクエストを開いてください。審査させていただきます。リソースは、既存のリソースを複製するのではなく、何か新しいものを示すことが理想的です。 ## BEiT specific outputs [[autodoc]] models.beit.modeling_beit.BeitModelOutputWithPooling [[autodoc]] models.beit.modeling_flax_beit.FlaxBeitModelOutputWithPooling ## BeitConfig [[autodoc]] BeitConfig ## BeitFeatureExtractor [[autodoc]] BeitFeatureExtractor - __call__ - post_process_semantic_segmentation ## BeitImageProcessor [[autodoc]] BeitImageProcessor - preprocess - post_process_semantic_segmentation ## BeitModel [[autodoc]] BeitModel - forward ## BeitForMaskedImageModeling [[autodoc]] BeitForMaskedImageModeling - forward ## BeitForImageClassification [[autodoc]] BeitForImageClassification - forward ## BeitForSemanticSegmentation [[autodoc]] BeitForSemanticSegmentation - forward ## FlaxBeitModel [[autodoc]] FlaxBeitModel - __call__ ## FlaxBeitForMaskedImageModeling [[autodoc]] FlaxBeitForMaskedImageModeling - __call__ ## FlaxBeitForImageClassification [[autodoc]] FlaxBeitForImageClassification - __call__

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# BROS ## Overview BROS モデルは、Teakgyu Hon、Donghyun Kim、Mingi Ji, Wonseok Hwang, Daehyun Nam, Sungrae Park によって [BROS: A Pre-trained Language Model Focusing on Text and Layout for Better Key Information Extraction from Documents](https://arxiv.org/abs/2108.04539) で提案されました。 BROS は *BERT Relying On Spatality* の略です。これは、一連のトークンとその境界ボックスを入力として受け取り、一連の隠れ状態を出力するエンコーダー専用の Transformer モデルです。 BROS は、絶対的な空間情報を使用する代わりに、相対的な空間情報をエンコードします。 BERT で使用されるトークンマスク言語モデリング目標 (TMLM) と新しいエリアマスク言語モデリング目標 (AMLM) の 2 つの目標で事前トレーニングされています。 TMLM では、トークンはランダムにマスクされ、モデルは空間情報と他のマスクされていないトークンを使用してマスクされたトークンを予測します。 AMLM は TMLM の 2D バージョンです。テキストトークンをランダムにマスクし、TMLM と同じ情報で予測しますが、テキストブロック (領域) をマスクします。 `BrosForTokenClassification`には、BrosModel の上に単純な線形層があります。各トークンのラベルを予測します。 `BrosSpadeEEForTokenClassification`には、BrosModel の上に`initial_token_classifier`と`subsequent_token_classifier`があります。 `initial_token_classifier` は各エンティティの最初のトークンを予測するために使用され、`subsequent_token_classifier` はエンティティ内の次のトークンを予測するために使用されます。 `BrosSpadeELForTokenClassification`には BrosModel の上に`entity_linker`があります。 `entity_linker` は 2 つのエンティティ間の関係を予測するために使用されます。 `BrosForTokenClassification`と`BrosSpadeEEForTokenClassification`は基本的に同じジョブを実行します。ただし、`BrosForTokenClassification`は入力トークンが完全にシリアル化されていることを前提としています (トークンは 2D 空間に存在するため、これは非常に困難な作業です)。一方、`BrosSpadeEEForTokenClassification`は 1 つのトークンから次の接続トークンを予測するため、シリアル化エラーの処理をより柔軟に行うことができます。 `BrosSpadeELForTokenClassification` はエンティティ内のリンクタスクを実行します。これら 2 つのエンティティが何らかの関係を共有する場合、(あるエンティティの) 1 つのトークンから (別のエンティティの) 別のトークンへの関係を予測します。 BROS は、明示的な視覚機能に依存せずに、FUNSD、SROIE、CORD、SciTSR などの Key Information Extraction (KIE) ベンチマークで同等以上の結果を達成します。論文の要約は次のとおりです。 *文書画像からの重要情報抽出 (KIE) には、2 次元 (2D) 空間におけるテキストの文脈的および空間的意味論を理解する必要があります。最近の研究の多くは、文書画像の視覚的特徴とテキストおよびそのレイアウトを組み合わせることに重点を置いた事前トレーニング済み言語モデルを開発することで、この課題を解決しようとしています。一方、このペーパーでは、テキストとレイアウトの効果的な組み合わせという基本に立ち返ってこの問題に取り組みます。具体的には、BROS (BERT Relying On Spatality) という名前の事前トレーニング済み言語モデルを提案します。この言語モデルは、2D 空間内のテキストの相対位置をエンコードし、エリアマスキング戦略を使用してラベルのないドキュメントから学習します。 2D 空間内のテキストを理解するためのこの最適化されたトレーニングスキームにより、BROS は、視覚的な特徴に依存することなく、4 つの KIE ベンチマーク (FUNSD、SROIE*、CORD、および SciTSR) で以前の方法と比較して同等以上のパフォーマンスを示しました。また、この論文では、KIE タスクにおける 2 つの現実世界の課題 ((1) 間違ったテキスト順序によるエラーの最小化、および (2) 少数の下流例からの効率的な学習) を明らかにし、以前の方法に対する BROS の優位性を実証します。* このモデルは [jinho8345](https://huggingface.co/jinho8345) によって寄稿されました。元のコードは [ここ](https://github.com/clovaai/bros) にあります。 ## Usage tips and examples - [`~transformers.BrosModel.forward`] には、`input_ids` と `bbox` (バウンディングボックス) が必要です。各境界ボックスは、(x0、y0、x1、y1) 形式 (左上隅、右下隅) である必要があります。境界ボックスの取得は外部 OCR システムに依存します。「x」座標はドキュメント画像の幅で正規化する必要があり、「y」座標はドキュメント画像の高さで正規化する必要があります。 ```python def expand_and_normalize_bbox(bboxes, doc_width, doc_height): # here, bboxes are numpy array # Normalize bbox -> 0 ~ 1 bboxes[:, [0, 2]] = bboxes[:, [0, 2]] / width bboxes[:, [1, 3]] = bboxes[:, [1, 3]] / height ``` - [`~transformers.BrosForTokenClassification.forward`、`~transformers.BrosSpadeEEForTokenClassification.forward`、`~transformers.BrosSpadeEEForTokenClassification.forward`] では、損失計算に `input_ids` と `bbox` だけでなく `box_first_token_mask` も必要です。これは、各ボックスの先頭以外のトークンを除外するためのマスクです。このマスクは、単語から `input_ids` を作成するときに境界ボックスの開始トークンインデックスを保存することで取得できます。次のコードで`box_first_token_mask`を作成できます。 ```python def make_box_first_token_mask(bboxes, words, tokenizer, max_seq_length=512): box_first_token_mask = np.zeros(max_seq_length, dtype=np.bool_) # encode(tokenize) each word from words (List[str]) input_ids_list: List[List[int]] = [tokenizer.encode(e, add_special_tokens=False) for e in words] # get the length of each box tokens_length_list: List[int] = [len(l) for l in input_ids_list] box_end_token_indices = np.array(list(itertools.accumulate(tokens_length_list))) box_start_token_indices = box_end_token_indices - np.array(tokens_length_list) # filter out the indices that are out of max_seq_length box_end_token_indices = box_end_token_indices[box_end_token_indices < max_seq_length - 1] if len(box_start_token_indices) > len(box_end_token_indices): box_start_token_indices = box_start_token_indices[: len(box_end_token_indices)] # set box_start_token_indices to True box_first_token_mask[box_start_token_indices] = True return box_first_token_mask ``` ## Resources - デモスクリプトは [こちら](https://github.com/clovaai/bros) にあります。 ## BrosConfig [[autodoc]] BrosConfig ## BrosProcessor [[autodoc]] BrosProcessor - __call__ ## BrosModel [[autodoc]] BrosModel - forward ## BrosForTokenClassification [[autodoc]] BrosForTokenClassification - forward ## BrosSpadeEEForTokenClassification [[autodoc]] BrosSpadeEEForTokenClassification - forward ## BrosSpadeELForTokenClassification [[autodoc]] BrosSpadeELForTokenClassification - forward

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# The Transformer model family 2017年に導入されて以来、[元のTransformer](https://arxiv.org/abs/1706.03762)モデルは、自然言語処理（NLP）のタスクを超える多くの新しいエキサイティングなモデルをインスパイアしました。[タンパク質の折りたたまれた構造を予測](https://huggingface.co/blog/deep-learning-with-proteins)するモデル、[チーターを走らせるためのトレーニング](https://huggingface.co/blog/train-decision-transformers)するモデル、そして[時系列予測](https://huggingface.co/blog/time-series-transformers)のためのモデルなどがあります。Transformerのさまざまなバリアントが利用可能ですが、大局を見落とすことがあります。これらのすべてのモデルに共通するのは、元のTransformerアーキテクチャに基づいていることです。一部のモデルはエンコーダまたはデコーダのみを使用し、他のモデルは両方を使用します。これは、Transformerファミリー内のモデルの高レベルの違いをカテゴライズし、調査するための有用な分類法を提供し、以前に出会ったことのないTransformerを理解するのに役立ちます。元のTransformerモデルに慣れていないか、リフレッシュが必要な場合は、Hugging Faceコースの[Transformerの動作原理](https://huggingface.co/course/chapter1/4?fw=pt)章をチェックしてください。 <div align="center"> <iframe width="560" height="315" src="https://www.youtube.com/embed/H39Z_720T5s" title="YouTubeビデオプレーヤー" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe> </div> ## Computer vision <iframe style="border: 1px solid rgba(0, 0, 0, 0.1);" width="1000" height="450" src="https://www.figma.com/embed?embed_host=share&url=https%3A%2F%2Fwww.figma.com%2Ffile%2FacQBpeFBVvrDUlzFlkejoz%2FModelscape-timeline%3Fnode-id%3D0%253A1%26t%3Dm0zJ7m2BQ9oe0WtO-1" allowfullscreen></iframe> ### Convolutional network 長い間、畳み込みネットワーク（CNN）はコンピュータビジョンのタスクにおいて支配的なパラダイムでしたが、[ビジョンTransformer](https://arxiv.org/abs/2010.11929)はそのスケーラビリティと効率性を示しました。それでも、一部のCNNの最高の特性、特に特定のタスクにとっては非常に強力な翻訳不変性など、一部のTransformerはアーキテクチャに畳み込みを組み込んでいます。[ConvNeXt](model_doc/convnext)は、畳み込みを現代化するためにTransformerから設計の選択肢を取り入れ、例えば、ConvNeXtは画像をパッチに分割するために重なり合わないスライディングウィンドウと、グローバル受容野を増加させるための大きなカーネルを使用します。ConvNeXtは、メモリ効率を向上させ、パフォーマンスを向上させるためにいくつかのレイヤーデザインの選択肢も提供し、Transformerと競合的になります！ ### Encoder[[cv-encoder]] [ビジョントランスフォーマー（ViT）](model_doc/vit) は、畳み込みを使用しないコンピュータビジョンタスクの扉を開けました。ViT は標準のトランスフォーマーエンコーダーを使用しますが、画像を扱う方法が主要なブレークスルーでした。画像を固定サイズのパッチに分割し、それらをトークンのように使用して埋め込みを作成します。ViT は、当時のCNNと競争力のある結果を示すためにトランスフォーマーの効率的なアーキテクチャを活用しましたが、トレーニングに必要なリソースが少なくて済みました。ViT に続いて、セグメンテーションや検出などの密なビジョンタスクを処理できる他のビジョンモデルも登場しました。これらのモデルの1つが[Swin](model_doc/swin) トランスフォーマーです。Swin トランスフォーマーは、より小さなサイズのパッチから階層的な特徴マップ（CNNのようで ViT とは異なります）を構築し、深層のパッチと隣接するパッチとマージします。注意はローカルウィンドウ内でのみ計算され、ウィンドウは注意のレイヤー間でシフトされ、モデルがより良く学習するのをサポートする接続を作成します。Swin トランスフォーマーは階層的な特徴マップを生成できるため、セグメンテーションや検出などの密な予測タスクに適しています。[SegFormer](model_doc/segformer) も階層的な特徴マップを構築するためにトランスフォーマーエンコーダーを使用しますが、すべての特徴マップを組み合わせて予測するためにシンプルなマルチレイヤーパーセプトロン（MLP）デコーダーを追加します。 BeIT および ViTMAE などの他のビジョンモデルは、BERTの事前トレーニング目標からインスピレーションを得ました。[BeIT](model_doc/beit) は *masked image modeling (MIM)* によって事前トレーニングされています。画像パッチはランダムにマスクされ、画像も視覚トークンにトークン化されます。BeIT はマスクされたパッチに対応する視覚トークンを予測するようにトレーニングされます。[ViTMAE](model_doc/vitmae) も似たような事前トレーニング目標を持っており、視覚トークンの代わりにピクセルを予測する必要があります。異例なのは画像パッチの75%がマスクされていることです！デコーダーはマスクされたトークンとエンコードされたパッチからピクセルを再構築します。事前トレーニングの後、デコーダーは捨てられ、エンコーダーはダウンストリームのタスクで使用できる状態です。 ### Decoder[[cv-decoder]] デコーダーのみのビジョンモデルは珍しいです。なぜなら、ほとんどのビジョンモデルは画像表現を学ぶためにエンコーダーを使用するからです。しかし、画像生成などのユースケースでは、デコーダーは自然な適応です。これは、GPT-2などのテキスト生成モデルから見てきたように、[ImageGPT](model_doc/imagegpt) でも同様のアーキテクチャを使用しますが、シーケンス内の次のトークンを予測する代わりに、画像内の次のピクセルを予測します。画像生成に加えて、ImageGPT は画像分類のためにもファインチューニングできます。 ### Encoder-decoder[[cv-encoder-decoder]] ビジョンモデルは一般的にエンコーダー（バックボーンとも呼ばれます）を使用して重要な画像特徴を抽出し、それをトランスフォーマーデコーダーに渡すために使用します。[DETR](model_doc/detr) は事前トレーニング済みのバックボーンを持っていますが、オブジェクト検出のために完全なトランスフォーマーエンコーダーデコーダーアーキテクチャも使用しています。エンコーダーは画像表現を学び、デコーダー内のオブジェクトクエリ（各オブジェクトクエリは画像内の領域またはオブジェクトに焦点を当てた学習された埋め込みです）と組み合わせます。DETR は各オブジェクトクエリに対する境界ボックスの座標とクラスラベルを予測します。 ## Natural lanaguage processing <iframe style="border: 1px solid rgba(0, 0, 0, 0.1);" width="1000" height="450" src="https://www.figma.com/embed?embed_host=share&url=https%3A%2F%2Fwww.figma.com%2Ffile%2FUhbQAZDlpYW5XEpdFy6GoG%2Fnlp-model-timeline%3Fnode-id%3D0%253A1%26t%3D4mZMr4r1vDEYGJ50-1" allowfullscreen></iframe> ### Encoder[[nlp-encoder]] [BERT](model_doc/bert) はエンコーダー専用のTransformerで、入力の一部のトークンをランダムにマスクして他のトークンを見ないようにしています。これにより、トークンをマスクした文脈に基づいてマスクされたトークンを予測することが事前トレーニングの目標です。これにより、BERTは入力のより深いかつ豊かな表現を学習するのに左右の文脈を完全に活用できます。しかし、BERTの事前トレーニング戦略にはまだ改善の余地がありました。[RoBERTa](model_doc/roberta) は、トレーニングを長時間行い、より大きなバッチでトレーニングし、事前処理中に一度だけでなく各エポックでトークンをランダムにマスクし、次文予測の目標を削除する新しい事前トレーニングレシピを導入することでこれを改善しました。性能を向上させる主要な戦略はモデルのサイズを増やすことですが、大規模なモデルのトレーニングは計算コストがかかります。計算コストを削減する方法の1つは、[DistilBERT](model_doc/distilbert) のような小さなモデルを使用することです。DistilBERTは[知識蒸留](https://arxiv.org/abs/1503.02531) - 圧縮技術 - を使用して、BERTのほぼすべての言語理解機能を保持しながら、より小さなバージョンを作成します。しかし、ほとんどのTransformerモデルは引き続きより多くのパラメータに焦点を当て、トレーニング効率を向上させる新しいモデルが登場しています。[ALBERT](model_doc/albert) は、2つの方法でパラメータの数を減らすことによってメモリ消費量を削減します。大きな語彙埋め込みを2つの小さな行列に分割し、レイヤーがパラメータを共有できるようにします。[DeBERTa](model_doc/deberta) は、単語とその位置を2つのベクトルで別々にエンコードする解かれた注意機構を追加しました。注意はこれらの別々のベクトルから計算されます。単語と位置の埋め込みが含まれる単一のベクトルではなく、[Longformer](model_doc/longformer) は、特に長いシーケンス長のドキュメントを処理するために注意をより効率的にすることに焦点を当てました。固定されたウィンドウサイズの周りの各トークンから計算されるローカルウィンドウ付き注意（特定のタスクトークン（分類のための `[CLS]` など）のみのためのグローバルな注意を含む）の組み合わせを使用して、完全な注意行列ではなく疎な注意行列を作成します。 ### Decoder[[nlp-decoder]] [GPT-2](model_doc/gpt2)は、シーケンス内の次の単語を予測するデコーダー専用のTransformerです。モデルは先を見ることができないようにトークンを右にマスクし、"のぞき見"を防ぎます。大量のテキストを事前トレーニングしたことにより、GPT-2はテキスト生成が非常に得意で、テキストが正確であることがあるにしても、時折正確ではないことがあります。しかし、GPT-2にはBERTの事前トレーニングからの双方向コンテキストが不足しており、特定のタスクには適していませんでした。[XLNET](model_doc/xlnet)は、双方向に学習できる順列言語モデリング目標（PLM）を使用することで、BERTとGPT-2の事前トレーニング目標のベストを組み合わせています。 GPT-2の後、言語モデルはさらに大きく成長し、今では*大規模言語モデル（LLM）*として知られています。大規模なデータセットで事前トレーニングされれば、LLMはほぼゼロショット学習を示すことがあります。[GPT-J](model_doc/gptj)は、6Bのパラメータを持つLLMで、400Bのトークンでトレーニングされています。GPT-Jには[OPT](model_doc/opt)が続き、そのうち最大のモデルは175Bで、180Bのトークンでトレーニングされています。同じ時期に[BLOOM](model_doc/bloom)がリリースされ、このファミリーの最大のモデルは176Bのパラメータを持ち、46の言語と13のプログラミング言語で366Bのトークンでトレーニングされています。 ### Encoder-decoder[[nlp-encoder-decoder]] [BART](model_doc/bart)は、元のTransformerアーキテクチャを保持していますが、事前トレーニング目標を*テキスト補完*の破損に変更しています。一部のテキストスパンは単一の`mask`トークンで置換されます。デコーダーは破損していないトークンを予測し（未来のトークンはマスクされます）、エンコーダーの隠れた状態を使用して予測を補助します。[Pegasus](model_doc/pegasus)はBARTに似ていますが、Pegasusはテキストスパンの代わりに文全体をマスクします。マスクされた言語モデリングに加えて、Pegasusはギャップ文生成（GSG）によって事前トレーニングされています。GSGの目標は、文書に重要な文をマスクし、それらを`mask`トークンで置換することです。デコーダーは残りの文から出力を生成しなければなりません。[T5](model_doc/t5)は、すべてのNLPタスクを特定のプレフィックスを使用してテキスト対テキストの問題に変換するよりユニークなモデルです。たとえば、プレフィックス`Summarize:`は要約タスクを示します。T5は教師ありトレーニング（GLUEとSuperGLUE）と自己教師ありトレーニング（トークンの15％をランダムにサンプルしドロップアウト）によって事前トレーニングされています。 ## Audio <iframe style="border: 1px solid rgba(0, 0, 0, 0.1);" width="1000" height="450" src="https://www.figma.com/embed?embed_host=share&url=https%3A%2F%2Fwww.figma.com%2Ffile%2Fvrchl8jDV9YwNVPWu2W0kK%2Fspeech-and-audio-model-timeline%3Fnode-id%3D0%253A1%26t%3DmM4H8pPMuK23rClL-1" allowfullscreen></iframe> ### Encoder[[audio-encoder]] [Wav2Vec2](model_doc/wav2vec2) は、生のオーディオ波形から直接音声表現を学習するためのTransformerエンコーダーを使用します。これは、対照的なタスクで事前学習され、一連の偽の表現から真の音声表現を特定します。 [HuBERT](model_doc/hubert) はWav2Vec2に似ていますが、異なるトレーニングプロセスを持っています。ターゲットラベルは、類似したオーディオセグメントがクラスタに割り当てられ、これが隠れユニットになるクラスタリングステップによって作成されます。隠れユニットは埋め込みにマップされ、予測を行います。 ### Encoder-decoder[[audio-encoder-decoder]] [Speech2Text](model_doc/speech_to_text) は、自動音声認識（ASR）および音声翻訳のために設計された音声モデルです。このモデルは、オーディオ波形から抽出されたログメルフィルターバンクフィーチャーを受け入れ、事前トレーニングされた自己回帰的にトランスクリプトまたは翻訳を生成します。 [Whisper](model_doc/whisper) もASRモデルですが、他の多くの音声モデルとは異なり、✨ ラベル付き ✨ オーディオトランスクリプションデータを大量に事前に学習して、ゼロショットパフォーマンスを実現します。データセットの大部分には非英語の言語も含まれており、Whisperは低リソース言語にも使用できます。構造的には、WhisperはSpeech2Textに似ています。オーディオ信号はエンコーダーによってエンコードされたログメルスペクトログラムに変換されます。デコーダーはエンコーダーの隠れ状態と前のトークンからトランスクリプトを自己回帰的に生成します。 ## Multimodal <iframe style="border: 1px solid rgba(0, 0, 0, 0.1);" width="1000" height="450" src="https://www.figma.com/embed?embed_host=share&url=https%3A%2F%2Fwww.figma.com%2Ffile%2FcX125FQHXJS2gxeICiY93p%2Fmultimodal%3Fnode-id%3D0%253A1%26t%3DhPQwdx3HFPWJWnVf-1" allowfullscreen></iframe> ### Encoder[[mm-encoder]] [VisualBERT](model_doc/visual_bert) は、BERTの後にリリースされたビジョン言語タスク向けのマルチモーダルモデルです。これはBERTと事前トレーニングされた物体検出システムを組み合わせ、画像特徴をビジュアル埋め込みに抽出し、テキスト埋め込みと一緒にBERTに渡します。VisualBERTは非マスクテキストを基にしたマスクテキストを予測し、テキストが画像と整合しているかどうかも予測する必要があります。ViTがリリースされた際、[ViLT](model_doc/vilt) は画像埋め込みを取得するためにこの方法を採用しました。画像埋め込みはテキスト埋め込みと共に共同で処理されます。それから、ViLTは画像テキストマッチング、マスク言語モデリング、および全単語マスキングによる事前トレーニングが行われます。 [CLIP](model_doc/clip) は異なるアプローチを取り、(`画像`、`テキスト`) のペア予測を行います。画像エンコーダー（ViT）とテキストエンコーダー（Transformer）は、(`画像`、`テキスト`) ペアデータセット上で共同トレーニングされ、(`画像`、`テキスト`) ペアの画像とテキストの埋め込みの類似性を最大化します。事前トレーニング後、CLIPを使用して画像からテキストを予測したり、その逆を行うことができます。[OWL-ViT](model_doc/owlvit) は、ゼロショット物体検出のバックボーンとしてCLIPを使用しています。事前トレーニング後、物体検出ヘッドが追加され、(`クラス`、`バウンディングボックス`) ペアに対するセット予測が行われます。 ### Encoder-decoder[[mm-encoder-decoder]] 光学文字認識（OCR）は、通常、画像を理解しテキストを生成するために複数のコンポーネントが関与するテキスト認識タスクです。 [TrOCR](model_doc/trocr) は、エンドツーエンドのTransformerを使用してこのプロセスを簡略化します。エンコーダーは画像を固定サイズのパッチとして処理するためのViTスタイルのモデルであり、デコーダーはエンコーダーの隠れ状態を受け入れ、テキストを自己回帰的に生成します。[Donut](model_doc/donut) はOCRベースのアプローチに依存しないより一般的なビジュアルドキュメント理解モデルで、エンコーダーとしてSwin Transformer、デコーダーとして多言語BARTを使用します。 Donutは画像とテキストの注釈に基づいて次の単語を予測することにより、テキストを読むために事前トレーニングされます。デコーダーはプロンプトを与えられたトークンシーケンスを生成します。プロンプトは各ダウンストリームタスクごとに特別なトークンを使用して表現されます。例えば、ドキュメントの解析には`解析`トークンがあり、エンコーダーの隠れ状態と組み合わされてドキュメントを構造化された出力フォーマット（JSON）に解析します。 ## Reinforcement learning <iframe style="border: 1px solid rgba(0, 0, 0, 0.1);" width="1000" height="450" src="https://www.figma.com/embed?embed_host=share&url=https%3A%2F%2Fwww.figma.com%2Ffile%2FiB3Y6RvWYki7ZuKO6tNgZq%2Freinforcement-learning%3Fnode-id%3D0%253A1%26t%3DhPQwdx3HFPWJWnVf-1" allowfullscreen></iframe> ### Decoder[[rl-decoder]] 意思決定と軌跡トランスフォーマーは、状態、アクション、報酬をシーケンスモデリングの問題として捉えます。 [Decision Transformer](model_doc/decision_transformer) は、リターン・トゥ・ゴー、過去の状態、およびアクションに基づいて将来の希望リターンにつながるアクションの系列を生成します。最後の *K* タイムステップでは、3つのモダリティそれぞれがトークン埋め込みに変換され、将来のアクショントークンを予測するためにGPTのようなモデルによって処理されます。[Trajectory Transformer](model_doc/trajectory_transformer) も状態、アクション、報酬をトークン化し、GPTアーキテクチャで処理します。報酬調整に焦点を当てたDecision Transformerとは異なり、Trajectory Transformerはビームサーチを使用して将来のアクションを生成します。

transformers/docs/source/ja/model_summary.md/0

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# Training on TPU with TensorFlow <Tip> 詳細な説明が不要で、単にTPUのコードサンプルを入手してトレーニングを開始したい場合は、[私たちのTPUの例のノートブックをチェックしてください！](https://colab.research.google.com/github/huggingface/notebooks/blob/main/examples/tpu_training-tf.ipynb) </Tip> ### What is a TPU? TPUは**Tensor Processing Unit（テンソル処理ユニット）**の略です。これらはGoogleが設計したハードウェアで、ニューラルネットワーク内のテンソル計算を大幅に高速化するために使用されます。これはGPUのようなものです。ネットワークのトレーニングと推論の両方に使用できます。一般的にはGoogleのクラウドサービスを介してアクセスされますが、Google ColabとKaggle Kernelsを通じても無料で小規模のTPUに直接アクセスできます。 [🤗 TransformersのすべてのTensorFlowモデルはKerasモデルです](https://huggingface.co/blog/tensorflow-philosophy)ので、この文書のほとんどの方法は一般的にKerasモデル用のTPUトレーニングに適用できます！ただし、TransformersとDatasetsのHuggingFaceエコシステム（hug-o-system？）に固有のポイントもいくつかあり、それについては適用するときにそれを示します。 ### What kinds of TPU are available? 新しいユーザーは、さまざまなTPUとそのアクセス方法に関する幅広い情報によく混乱します。理解するための最初の重要な違いは、**TPUノード**と**TPU VM**の違いです。 **TPUノード**を使用すると、事実上リモートのTPUに間接的にアクセスします。別個のVMが必要で、ネットワークとデータパイプラインを初期化し、それらをリモートノードに転送します。Google ColabでTPUを使用すると、**TPUノード**スタイルでアクセスしています。 TPUノードを使用すると、それに慣れていない人々にはかなり予期しない動作が発生することがあります！特に、TPUはPythonコードを実行しているマシンと物理的に異なるシステムに配置されているため、データはローカルマシンにローカルで格納されているデータパイプラインが完全に失敗します。代わりに、データはGoogle Cloud Storageに格納する必要があります。ここでデータパイプラインはリモートのTPUノードで実行されている場合でも、データにアクセスできます。 <Tip> すべてのデータを`np.ndarray`または`tf.Tensor`としてメモリに収めることができる場合、ColabまたはTPUノードを使用している場合でも、データをGoogle Cloud Storageにアップロードせずに`fit()`でトレーニングできます。 </Tip> <Tip> **🤗 Hugging Face固有のヒント🤗:** TFコードの例でよく見るであろう`Dataset.to_tf_dataset()`とその高レベルのラッパーである`model.prepare_tf_dataset()`は、TPUノードで失敗します。これは、`tf.data.Dataset`を作成しているにもかかわらず、それが「純粋な」`tf.data`パイプラインではなく、`tf.numpy_function`または`Dataset.from_generator()`を使用して基盤となるHuggingFace `Dataset`からデータをストリームで読み込むことからです。このHuggingFace `Dataset`はローカルディスク上のデータをバックアップしており、リモートTPUノードが読み取ることができないためです。 </Tip> TPUにアクセスする第二の方法は、**TPU VM**を介してです。TPU VMを使用する場合、TPUが接続されているマシンに直接接続します。これはGPU VMでトレーニングを行うのと同様です。TPU VMは一般的にデータパイプラインに関しては特に作業がしやすく、上記のすべての警告はTPU VMには適用されません！これは主観的な文書ですので、こちらの意見です：**可能な限りTPUノードの使用を避けてください。** TPU VMよりも混乱しやすく、デバッグが難しいです。将来的にはサポートされなくなる可能性もあります - Googleの最新のTPUであるTPUv4は、TPU VMとしてのみアクセスできるため、TPUノードは将来的には「レガシー」のアクセス方法になる可能性が高いです。ただし、無料でTPUにアクセスできるのはColabとKaggle Kernelsの場合があります。その場合、どうしても使用しなければならない場合の取り扱い方法を説明しようとします！詳細は[TPUの例のノートブック](https://colab.research.google.com/github/huggingface/notebooks/blob/main/examples/tpu_training-tf.ipynb)で詳細な説明を確認してください。 ### What sizes of TPU are available? 単一のTPU（v2-8/v3-8/v4-8）は8つのレプリカを実行します。TPUは数百から数千のレプリカを同時に実行できる**ポッド**に存在します。単一のTPUよりも多くのTPUを使用するが、ポッド全体ではない場合（たとえばv3-32）、TPUフリートは**ポッドスライス**として参照されます。 Colabを介して無料のTPUにアクセスする場合、通常は単一のv2-8 TPUが提供されます。 ### I keep hearing about this XLA thing. What’s XLA, and how does it relate to TPUs? XLAは、TensorFlowとJAXの両方で使用される最適化コンパイラです。JAXでは唯一のコンパイラであり、TensorFlowではオプションですが（しかしTPUでは必須です！）、Kerasモデルをトレーニングする際に`model.compile()`に引数`jit_compile=True`を渡すことで最も簡単に有効にできます。エラーが発生せず、パフォーマンスが良好であれば、それはTPUに移行する準備が整った良い兆候です！ TPU上でのデバッグは一般的にCPU/GPUよりも少し難しいため、TPUで試す前にまずCPU/GPUでXLAを使用してコードを実行することをお勧めします。もちろん、長時間トレーニングする必要はありません。モデルとデータパイプラインが期待通りに動作するかを確認するための数ステップだけです。 <Tip> XLAコンパイルされたコードは通常高速です。したがって、TPUで実行する予定がない場合でも、`jit_compile=True`を追加することでパフォーマンスを向上させることができます。ただし、以下のXLA互換性に関する注意事項に注意してください！ </Tip> <Tip warning={true}> **苦い経験から生まれたヒント:** `jit_compile=True`を使用することは、CPU/GPUコードがXLA互換であることを確認し、速度を向上させる良い方法ですが、実際にTPUでコードを実行する際には多くの問題を引き起こす可能性があります。 XLAコンパイルはTPU上で暗黙的に行われるため、実際にコードをTPUで実行する前にその行を削除することを忘れないでください！ </Tip> ### How do I make my model XLA compatible? 多くの場合、コードはすでにXLA互換かもしれません！ただし、XLAでは動作する通常のTensorFlowでも動作しないいくつかの要素があります。以下に、3つの主要なルールにまとめています： <Tip> **🤗 HuggingFace固有のヒント🤗:** TensorFlowモデルと損失関数をXLA互換に書き直すために多くの努力を払っています。通常、モデルと損失関数はデフォルトでルール＃1と＃2に従っているため、`transformers`モデルを使用している場合はこれらをスキップできます。ただし、独自のモデルと損失関数を記述する場合は、これらのルールを忘れないでください！ </Tip> #### XLA Rule #1: Your code cannot have “data-dependent conditionals” これは、任意の`if`ステートメントが`tf.Tensor`内の値に依存していない必要があることを意味します。例えば、次のコードブロックはXLAでコンパイルできません！ ```python if tf.reduce_sum(tensor) > 10: tensor = tensor / 2.0 ``` これは最初は非常に制限的に思えるかもしれませんが、ほとんどのニューラルネットコードはこれを行う必要はありません。通常、この制約を回避するために`tf.cond`を使用するか（ドキュメントはこちらを参照）、条件を削除して代わりに指示変数を使用したりすることができます。次のように： ```python sum_over_10 = tf.cast(tf.reduce_sum(tensor) > 10, tf.float32) tensor = tensor / (1.0 + sum_over_10) ``` このコードは、上記のコードとまったく同じ効果を持っていますが、条件を回避することで、XLAで問題なくコンパイルできることを確認します！ #### XLA Rule #2: Your code cannot have “data-dependent shapes” これは、コード内のすべての `tf.Tensor` オブジェクトの形状が、その値に依存しないことを意味します。たとえば、`tf.unique` 関数はXLAでコンパイルできないので、このルールに違反します。なぜなら、これは入力 `Tensor` の一意の値の各インスタンスを含む `tensor` を返すためです。この出力の形状は、入力 `Tensor` の重複具合によって異なるため、XLAはそれを処理しないことになります！一般的に、ほとんどのニューラルネットワークコードはデフォルトでルール＃2に従います。ただし、いくつかの一般的なケースでは問題が発生することがあります。非常に一般的なケースの1つは、**ラベルマスキング**を使用する場合です。ラベルを無視して損失を計算する場所を示すために、ラベルを負の値に設定する方法です。NumPyまたはPyTorchのラベルマスキングをサポートする損失関数を見ると、次のような[ブールインデックス](https://numpy.org/doc/stable/user/basics.indexing.html#boolean-array-indexing)を使用したコードがよく見られます： ```python label_mask = labels >= 0 masked_outputs = outputs[label_mask] masked_labels = labels[label_mask] loss = compute_loss(masked_outputs, masked_labels) mean_loss = torch.mean(loss) ``` このコードはNumPyやPyTorchでは完全に機能しますが、XLAでは動作しません！なぜなら、`masked_outputs`と`masked_labels`の形状はマスクされた位置の数に依存するため、これは**データ依存の形状**になります。ただし、ルール＃1と同様に、このコードを書き直して、データ依存の形状なしでまったく同じ出力を生成できることがあります。 ```python label_mask = tf.cast(labels >= 0, tf.float32) loss = compute_loss(outputs, labels) loss = loss * label_mask # Set negative label positions to 0 mean_loss = tf.reduce_sum(loss) / tf.reduce_sum(label_mask) ``` ここでは、データ依存の形状を避けるために、各位置で損失を計算してから、平均を計算する際に分子と分母の両方でマスクされた位置をゼロ化する方法を紹介します。これにより、最初のアプローチとまったく同じ結果が得られますが、XLA互換性を維持します。注意点として、ルール＃1と同じトリックを使用します - `tf.bool`を`tf.float32`に変換して指標変数として使用します。これは非常に便利なトリックですので、自分のコードをXLAに変換する必要がある場合には覚えておいてください！ #### XLA Rule #3: XLA will need to recompile your model for every different input shape it sees これは重要なルールです。これはつまり、入力形状が非常に変動的な場合、XLA はモデルを何度も再コンパイルする必要があるため、大きなパフォーマンスの問題が発生する可能性があるということです。これは NLP モデルで一般的に発生し、トークナイズ後の入力テキストの長さが異なる場合があります。他のモダリティでは、静的な形状が一般的であり、このルールはほとんど問題になりません。ルール＃3を回避する方法は何でしょうか？鍵は「パディング」です - すべての入力を同じ長さにパディングし、次に「attention_mask」を使用することで、可変形状と同じ結果を得ることができますが、XLA の問題は発生しません。ただし、過度のパディングも深刻な遅延を引き起こす可能性があります - データセット全体で最大の長さにすべてのサンプルをパディングすると、多くの計算とメモリを無駄にする可能性があります！この問題には完璧な解決策はありませんが、いくつかのトリックを試すことができます。非常に便利なトリックの1つは、**バッチのサンプルを32または64トークンの倍数までパディングする**ことです。これにより、トークン数がわずかに増加するだけで、すべての入力形状が32または64の倍数である必要があるため、一意の入力形状の数が大幅に減少します。一意の入力形状が少ないと、XLA の再コンパイルが少なくなります！ <Tip> **🤗 HuggingFace に関する具体的なヒント🤗:** 弊社のトークナイザーとデータコレクターには、ここで役立つメソッドがあります。トークナイザーを呼び出す際に `padding="max_length"` または `padding="longest"` を使用して、パディングされたデータを出力するように設定できます。トークナイザーとデータコレクターには、一意の入力形状の数を減らすのに役立つ `pad_to_multiple_of` 引数もあります！ </Tip> ### How do I actually train my model on TPU? 一度トレーニングが XLA 互換性があることを確認し、（TPU Node/Colab を使用する場合は）データセットが適切に準備されている場合、TPU 上で実行することは驚くほど簡単です！コードを変更する必要があるのは、いくつかの行を追加して TPU を初期化し、モデルとデータセットが `TPUStrategy` スコープ内で作成されるようにすることだけです。これを実際に見るには、[TPU のサンプルノートブック](https://colab.research.google.com/github/huggingface/notebooks/blob/main/examples/tpu_training-tf.ipynb)をご覧ください！ ### Summary ここでは多くの情報が提供されましたので、TPU でモデルをトレーニングする際に以下のチェックリストを使用できます： - コードが XLA の三つのルールに従っていることを確認します。 - CPU/GPU で `jit_compile=True` を使用してモデルをコンパイルし、XLA でトレーニングできることを確認します。 - データセットをメモリに読み込むか、TPU 互換のデータセット読み込みアプローチを使用します（[ノートブックを参照](https://colab.research.google.com/github/huggingface/notebooks/blob/main/examples/tpu_training-tf.ipynb)）。 - コードを Colab（アクセラレータを「TPU」に設定）または Google Cloud の TPU VM に移行します。 - TPU 初期化コードを追加します（[ノートブックを参照](https://colab.research.google.com/github/huggingface/notebooks/blob/main/examples/tpu_training-tf.ipynb)）。 - `TPUStrategy` を作成し、データセットの読み込みとモデルの作成が `strategy.scope()` 内で行われることを確認します（[ノートブックを参照](https://colab.research.google.com/github/huggingface/notebooks/blob/main/examples/tpu_training-tf.ipynb)）。 - TPU に移行する際に `jit_compile=True` を外すのを忘れないでください！ - 🙏🙏🙏🥺🥺🥺 - `model.fit()` を呼び出します。 - おめでとうございます！

transformers/docs/source/ja/perf_train_tpu_tf.md/0

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# Image captioning [[open-in-colab]] 画像のキャプション付けは、特定の画像のキャプションを予測するタスクです。一般的な現実世界のアプリケーションには次のものがあります。視覚障害者がさまざまな状況を乗り越えられるよう支援します。したがって、画像のキャプション画像を説明することで人々のコンテンツへのアクセシビリティを向上させるのに役立ちます。このガイドでは、次の方法を説明します。 * 画像キャプションモデルを微調整します。 * 微調整されたモデルを推論に使用します。始める前に、必要なライブラリがすべてインストールされていることを確認してください。 ```bash pip install transformers datasets evaluate -q pip install jiwer -q ``` モデルをアップロードしてコミュニティと共有できるように、Hugging Face アカウントにログインすることをお勧めします。プロンプトが表示されたら、トークンを入力してログインします。 ```python from huggingface_hub import notebook_login notebook_login() ``` ## Load the Pokémon BLIP captions dataset 🤗 データセットライブラリを使用して、{image-caption} ペアで構成されるデータセットを読み込みます。独自の画像キャプションデータセットを作成するには PyTorch では、[このノートブック](https://github.com/NielsRogge/Transformers-Tutorials/blob/master/GIT/Fine_tune_GIT_on_an_image_captioning_dataset.ipynb) を参照できます。 ```py ds = load_dataset("lambdalabs/pokemon-blip-captions") ds ``` ```bash DatasetDict({ train: Dataset({ features: ['image', 'text'], num_rows: 833 }) }) ``` データセットには `image`と`text`の 2 つの機能があります。 <Tip> 多くの画像キャプションデータセットには、画像ごとに複数のキャプションが含まれています。このような場合、一般的な戦略は、トレーニング中に利用可能なキャプションの中からランダムにキャプションをサンプリングすることです。 </Tip> [`~datasets.Dataset.train_test_split`] メソッドを使用して、データセットのトレインスプリットをトレインセットとテストセットに分割します。 ```python ds = ds["train"].train_test_split(test_size=0.1) train_ds = ds["train"] test_ds = ds["test"] ``` トレーニングセットからのいくつかのサンプルを視覚化してみましょう。 ```python from textwrap import wrap import matplotlib.pyplot as plt import numpy as np def plot_images(images, captions): plt.figure(figsize=(20, 20)) for i in range(len(images)): ax = plt.subplot(1, len(images), i + 1) caption = captions[i] caption = "\n".join(wrap(caption, 12)) plt.title(caption) plt.imshow(images[i]) plt.axis("off") sample_images_to_visualize = [np.array(train_ds[i]["image"]) for i in range(5)] sample_captions = [train_ds[i]["text"] for i in range(5)] plot_images(sample_images_to_visualize, sample_captions) ``` <div class="flex justify-center"> <img src="https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/transformers/tasks/sample_training_images_image_cap.png" alt="Sample training images"/> </div> ## Preprocess the dataset データセットには 2 つのモダリティ (画像とテキスト) があるため、前処理パイプラインは画像とキャプションを前処理します。これを行うには、微調整しようとしているモデルに関連付けられたプロセッサクラスをロードします。 ```python from transformers import AutoProcessor checkpoint = "microsoft/git-base" processor = AutoProcessor.from_pretrained(checkpoint) ``` プロセッサは内部で画像を前処理し (サイズ変更やピクセルスケーリングを含む)、キャプションをトークン化します。 ```python def transforms(example_batch): images = [x for x in example_batch["image"]] captions = [x for x in example_batch["text"]] inputs = processor(images=images, text=captions, padding="max_length") inputs.update({"labels": inputs["input_ids"]}) return inputs train_ds.set_transform(transforms) test_ds.set_transform(transforms) ``` データセットの準備ができたら、微調整用にモデルをセットアップできます。 ## Load a base model ["microsoft/git-base"](https://huggingface.co/microsoft/git-base) を [`AutoModelForCausalLM`](https://huggingface.co/docs/transformers/model_doc/auto#transformers.AutoModelForCausalLM) オブジェクト。 ```python from transformers import AutoModelForCausalLM model = AutoModelForCausalLM.from_pretrained(checkpoint) ``` ```python from transformers import AutoModelForCausalLM model = AutoModelForCausalLM.from_pretrained(checkpoint) ``` ## Evaluate 画像キャプションモデルは通常、[Rouge Score](https://huggingface.co/spaces/evaluate-metric/rouge) または [Word Error Rate](https://huggingface.co/spaces/evaluate-metric/) で評価されます。そうだった）。このガイドでは、Word Error Rate (WER) を使用します。これを行うには 🤗 Evaluate ライブラリを使用します。 WER の潜在的な制限やその他の問題点については、[このガイド](https://huggingface.co/spaces/evaluate-metric/wer) を参照してください。 ```python from evaluate import load import torch wer = load("wer") def compute_metrics(eval_pred): logits, labels = eval_pred predicted = logits.argmax(-1) decoded_labels = processor.batch_decode(labels, skip_special_tokens=True) decoded_predictions = processor.batch_decode(predicted, skip_special_tokens=True) wer_score = wer.compute(predictions=decoded_predictions, references=decoded_labels) return {"wer_score": wer_score} ``` ## Train! これで、モデルの微調整を開始する準備が整いました。これには 🤗 [`Trainer`] を使用します。まず、[`TrainingArguments`] を使用してトレーニング引数を定義します。 ```python from transformers import TrainingArguments, Trainer model_name = checkpoint.split("/")[1] training_args = TrainingArguments( output_dir=f"{model_name}-pokemon", learning_rate=5e-5, num_train_epochs=50, fp16=True, per_device_train_batch_size=32, per_device_eval_batch_size=32, gradient_accumulation_steps=2, save_total_limit=3, evaluation_strategy="steps", eval_steps=50, save_strategy="steps", save_steps=50, logging_steps=50, remove_unused_columns=False, push_to_hub=True, label_names=["labels"], load_best_model_at_end=True, ) ``` Trainer 次に、次に、データセットとモデルと一緒に 🤗 に渡します。 ```python trainer = Trainer( model=model, args=training_args, train_dataset=train_ds, eval_dataset=test_ds, compute_metrics=compute_metrics, ) ``` トレーニングを開始するには、[`Trainer`] オブジェクトの [`~Trainer.train`] を呼び出すだけです。 ```python trainer.train() ``` トレーニングが進むにつれて、トレーニングの損失がスムーズに減少することがわかります。トレーニングが完了したら、 [`~Trainer.push_to_hub`] メソッドを使用してモデルをハブに共有し、誰もがモデルを使用できるようにします。 ```python trainer.push_to_hub() ``` ## Inference `test_ds` からサンプル画像を取得してモデルをテストします。 ```python from PIL import Image import requests url = "https://huggingface.co/datasets/sayakpaul/sample-datasets/resolve/main/pokemon.png" image = Image.open(requests.get(url, stream=True).raw) image ``` <div class="flex justify-center"> <img src="https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/transformers/tasks/test_image_image_cap.png" alt="Test image"/> </div> モデル用の画像を準備します。 ```python device = "cuda" if torch.cuda.is_available() else "cpu" inputs = processor(images=image, return_tensors="pt").to(device) pixel_values = inputs.pixel_values ``` [`generate`] を呼び出して予測をデコードします。 ```python generated_ids = model.generate(pixel_values=pixel_values, max_length=50) generated_caption = processor.batch_decode(generated_ids, skip_special_tokens=True)[0] print(generated_caption) ``` ```bash a drawing of a pink and blue pokemon ``` 微調整されたモデルにより、非常に優れたキャプションが生成されたようです。

transformers/docs/source/ja/tasks/image_captioning.md/0

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# Translation [[open-in-colab]] <Youtube id="1JvfrvZgi6c"/> 翻訳では、一連のテキストをある言語から別の言語に変換します。これは、シーケンス間問題として定式化できるいくつかのタスクの 1 つであり、翻訳や要約など、入力から何らかの出力を返すための強力なフレームワークです。翻訳システムは通常、異なる言語のテキスト間の翻訳に使用されますが、音声、またはテキストから音声への変換や音声からテキストへの変換など、音声間の組み合わせにも使用できます。このガイドでは、次の方法を説明します。 1. [OPUS Books](https://huggingface.co/datasets/opus_books) データセットの英語-フランス語サブセットの [T5](https://huggingface.co/google-t5/t5-small) を微調整して、英語のテキストを次の形式に翻訳します。フランス語。 2. 微調整されたモデルを推論に使用します。 <Tip> このチュートリアルで説明するタスクは、次のモデルアーキテクチャでサポートされています。  [BART](../model_doc/bart), [BigBird-Pegasus](../model_doc/bigbird_pegasus), [Blenderbot](../model_doc/blenderbot), [BlenderbotSmall](../model_doc/blenderbot-small), [Encoder decoder](../model_doc/encoder-decoder), [FairSeq Machine-Translation](../model_doc/fsmt), [GPTSAN-japanese](../model_doc/gptsan-japanese), [LED](../model_doc/led), [LongT5](../model_doc/longt5), [M2M100](../model_doc/m2m_100), [Marian](../model_doc/marian), [mBART](../model_doc/mbart), [MT5](../model_doc/mt5), [MVP](../model_doc/mvp), [NLLB](../model_doc/nllb), [NLLB-MOE](../model_doc/nllb-moe), [Pegasus](../model_doc/pegasus), [PEGASUS-X](../model_doc/pegasus_x), [PLBart](../model_doc/plbart), [ProphetNet](../model_doc/prophetnet), [SwitchTransformers](../model_doc/switch_transformers), [T5](../model_doc/t5), [UMT5](../model_doc/umt5), [XLM-ProphetNet](../model_doc/xlm-prophetnet)  </Tip> 始める前に、必要なライブラリがすべてインストールされていることを確認してください。 ```bash pip install transformers datasets evaluate sacrebleu ``` モデルをアップロードしてコミュニティと共有できるように、Hugging Face アカウントにログインすることをお勧めします。プロンプトが表示されたら、トークンを入力してログインします。 ```py >>> from huggingface_hub import notebook_login >>> notebook_login() ``` ## Load OPUS Books dataset まず、🤗 データセットライブラリから [OPUS Books](https://huggingface.co/datasets/opus_books) データセットの英語とフランス語のサブセットを読み込みます。 ```py >>> from datasets import load_dataset >>> books = load_dataset("opus_books", "en-fr") ``` [`~datasets.Dataset.train_test_split`] メソッドを使用して、データセットをトレインセットとテストセットに分割します。 ```py >>> books = books["train"].train_test_split(test_size=0.2) ``` 次に、例を見てみましょう。 ```py >>> books["train"][0] {'id': '90560', 'translation': {'en': 'But this lofty plateau measured only a few fathoms, and soon we reentered Our Element.', 'fr': 'Mais ce plateau élevé ne mesurait que quelques toises, et bientôt nous fûmes rentrés dans notre élément.'}} ``` `translation`: テキストの英語とフランス語の翻訳。 ## Preprocess <Youtube id="XAR8jnZZuUs"/> 次のステップでは、T5 トークナイザーをロードして英語とフランス語の言語ペアを処理します。 ```py >>> from transformers import AutoTokenizer >>> checkpoint = "google-t5/t5-small" >>> tokenizer = AutoTokenizer.from_pretrained(checkpoint) ``` 作成する前処理関数は次のことを行う必要があります。 1. T5 がこれが翻訳タスクであることを認識できるように、入力の前にプロンプトを付けます。複数の NLP タスクが可能な一部のモデルでは、特定のタスクのプロンプトが必要です。 2. 英語の語彙で事前トレーニングされたトークナイザーを使用してフランス語のテキストをトークン化することはできないため、入力 (英語) とターゲット (フランス語) を別々にトークン化します。 3. `max_length`パラメータで設定された最大長を超えないようにシーケンスを切り詰めます。 ```py >>> source_lang = "en" >>> target_lang = "fr" >>> prefix = "translate English to French: " >>> def preprocess_function(examples): ... inputs = [prefix + example[source_lang] for example in examples["translation"]] ... targets = [example[target_lang] for example in examples["translation"]] ... model_inputs = tokenizer(inputs, text_target=targets, max_length=128, truncation=True) ... return model_inputs ``` データセット全体に前処理関数を適用するには、🤗 Datasets [`~datasets.Dataset.map`] メソッドを使用します。 `batched=True` を設定してデータセットの複数の要素を一度に処理することで、`map` 関数を高速化できます。 ```py >>> tokenized_books = books.map(preprocess_function, batched=True) ``` 次に、[`DataCollatorForSeq2Seq`] を使用してサンプルのバッチを作成します。データセット全体を最大長までパディングするのではなく、照合中にバッチ内の最長の長さまで文を *動的にパディング* する方が効率的です。 <frameworkcontent> <pt> ```py >>> from transformers import DataCollatorForSeq2Seq >>> data_collator = DataCollatorForSeq2Seq(tokenizer=tokenizer, model=checkpoint) ``` </pt> <tf> ```py >>> from transformers import DataCollatorForSeq2Seq >>> data_collator = DataCollatorForSeq2Seq(tokenizer=tokenizer, model=checkpoint, return_tensors="tf") ``` </tf> </frameworkcontent> ## Evaluate トレーニング中にメトリクスを含めると、多くの場合、モデルのパフォーマンスを評価するのに役立ちます。 🤗 [Evaluate](https://huggingface.co/docs/evaluate/index) ライブラリを使用して、評価メソッドをすばやくロードできます。このタスクでは、[SacreBLEU](https://huggingface.co/spaces/evaluate-metric/sacrebleu) メトリクスをロードします (🤗 Evaluate [クイックツアー](https://huggingface.co/docs/evaluate/a_quick_tour) を参照してください) ) メトリクスの読み込みと計算方法の詳細については、次を参照してください)。 ```py >>> import evaluate >>> metric = evaluate.load("sacrebleu") ``` 次に、予測とラベルを [`~evaluate.EvaluationModule.compute`] に渡して SacreBLEU スコアを計算する関数を作成します。 ```py >>> import numpy as np >>> def postprocess_text(preds, labels): ... preds = [pred.strip() for pred in preds] ... labels = [[label.strip()] for label in labels] ... return preds, labels >>> def compute_metrics(eval_preds): ... preds, labels = eval_preds ... if isinstance(preds, tuple): ... preds = preds[0] ... decoded_preds = tokenizer.batch_decode(preds, skip_special_tokens=True) ... labels = np.where(labels != -100, labels, tokenizer.pad_token_id) ... decoded_labels = tokenizer.batch_decode(labels, skip_special_tokens=True) ... decoded_preds, decoded_labels = postprocess_text(decoded_preds, decoded_labels) ... result = metric.compute(predictions=decoded_preds, references=decoded_labels) ... result = {"bleu": result["score"]} ... prediction_lens = [np.count_nonzero(pred != tokenizer.pad_token_id) for pred in preds] ... result["gen_len"] = np.mean(prediction_lens) ... result = {k: round(v, 4) for k, v in result.items()} ... return result ``` これで`compute_metrics`関数の準備が整いました。トレーニングをセットアップするときにこの関数に戻ります。 ## Train <frameworkcontent> <pt> <Tip> [`Trainer`] を使用したモデルの微調整に慣れていない場合は、[ここ](../training#train-with-pytorch-trainer) の基本的なチュートリアルをご覧ください。 </Tip> これでモデルのトレーニングを開始する準備が整いました。 [`AutoModelForSeq2SeqLM`] を使用して T5 をロードします。 ```py >>> from transformers import AutoModelForSeq2SeqLM, Seq2SeqTrainingArguments, Seq2SeqTrainer >>> model = AutoModelForSeq2SeqLM.from_pretrained(checkpoint) ``` この時点で残っているステップは 3 つだけです。 1. [`Seq2SeqTrainingArguments`] でトレーニングハイパーパラメータを定義します。唯一の必須パラメータは、モデルの保存場所を指定する `output_dir` です。 `push_to_hub=True`を設定して、このモデルをハブにプッシュします (モデルをアップロードするには、Hugging Face にサインインする必要があります)。各エポックの終了時に、[`Trainer`] は SacreBLEU メトリクスを評価し、トレーニングチェックポイントを保存します。 2. トレーニング引数をモデル、データセット、トークナイザー、データ照合器、および `compute_metrics` 関数とともに [`Seq2SeqTrainer`] に渡します。 3. [`~Trainer.train`] を呼び出してモデルを微調整します。 ```py >>> training_args = Seq2SeqTrainingArguments( ... output_dir="my_awesome_opus_books_model", ... evaluation_strategy="epoch", ... learning_rate=2e-5, ... per_device_train_batch_size=16, ... per_device_eval_batch_size=16, ... weight_decay=0.01, ... save_total_limit=3, ... num_train_epochs=2, ... predict_with_generate=True, ... fp16=True, ... push_to_hub=True, ... ) >>> trainer = Seq2SeqTrainer( ... model=model, ... args=training_args, ... train_dataset=tokenized_books["train"], ... eval_dataset=tokenized_books["test"], ... tokenizer=tokenizer, ... data_collator=data_collator, ... compute_metrics=compute_metrics, ... ) >>> trainer.train() ``` トレーニングが完了したら、 [`~transformers.Trainer.push_to_hub`] メソッドを使用してモデルをハブに共有し、誰もがモデルを使用できるようにします。 ```py >>> trainer.push_to_hub() ``` </pt> <tf> <Tip> Keras を使用したモデルの微調整に慣れていない場合は、[こちら](../training#train-a-tensorflow-model-with-keras) の基本的なチュートリアルをご覧ください。 </Tip> TensorFlow でモデルを微調整するには、オプティマイザー関数、学習率スケジュール、およびいくつかのトレーニングハイパーパラメーターをセットアップすることから始めます。 ```py >>> from transformers import AdamWeightDecay >>> optimizer = AdamWeightDecay(learning_rate=2e-5, weight_decay_rate=0.01) ``` 次に、[`TFAutoModelForSeq2SeqLM`] を使用して T5 をロードできます。 ```py >>> from transformers import TFAutoModelForSeq2SeqLM >>> model = TFAutoModelForSeq2SeqLM.from_pretrained(checkpoint) ``` [`~transformers.TFPreTrainedModel.prepare_tf_dataset`] を使用して、データセットを `tf.data.Dataset` 形式に変換します。 ```py >>> tf_train_set = model.prepare_tf_dataset( ... tokenized_books["train"], ... shuffle=True, ... batch_size=16, ... collate_fn=data_collator, ... ) >>> tf_test_set = model.prepare_tf_dataset( ... tokenized_books["test"], ... shuffle=False, ... batch_size=16, ... collate_fn=data_collator, ... ) ``` [`compile`](https://keras.io/api/models/model_training_apis/#compile-method) を使用してトレーニング用のモデルを設定します。 Transformers モデルにはすべてデフォルトのタスク関連の損失関数があるため、次の場合を除き、損失関数を指定する必要はないことに注意してください。 ```py >>> import tensorflow as tf >>> model.compile(optimizer=optimizer) # No loss argument! ``` トレーニングを開始する前にセットアップする最後の 2 つのことは、予測から SacreBLEU メトリクスを計算し、モデルをハブにプッシュする方法を提供することです。どちらも [Keras コールバック](../main_classes/keras_callbacks) を使用して行われます。 `compute_metrics` 関数を [`~transformers.KerasMetricCallback`] に渡します。 ```py >>> from transformers.keras_callbacks import KerasMetricCallback >>> metric_callback = KerasMetricCallback(metric_fn=compute_metrics, eval_dataset=tf_validation_set) ``` [`~transformers.PushToHubCallback`] でモデルとトークナイザーをプッシュする場所を指定します。 ```py >>> from transformers.keras_callbacks import PushToHubCallback >>> push_to_hub_callback = PushToHubCallback( ... output_dir="my_awesome_opus_books_model", ... tokenizer=tokenizer, ... ) ``` 次に、コールバックをまとめてバンドルします。 ```py >>> callbacks = [metric_callback, push_to_hub_callback] ``` ついに、モデルのトレーニングを開始する準備が整いました。トレーニングおよび検証データセット、エポック数、コールバックを指定して [`fit`](https://keras.io/api/models/model_training_apis/#fit-method) を呼び出し、モデルを微調整します。 ```py >>> model.fit(x=tf_train_set, validation_data=tf_test_set, epochs=3, callbacks=callbacks) ``` トレーニングが完了すると、モデルは自動的にハブにアップロードされ、誰でも使用できるようになります。 </tf> </frameworkcontent> <Tip> 翻訳用にモデルを微調整する方法の詳細な例については、対応するドキュメントを参照してください。 [PyTorch ノートブック](https://colab.research.google.com/github/huggingface/notebooks/blob/main/examples/translation.ipynb) または [TensorFlow ノートブック](https://colab.research.google.com/github/huggingface/notebooks/blob/main/examples/translation-tf.ipynb)。 </Tip> ## Inference モデルを微調整したので、それを推論に使用できるようになりました。別の言語に翻訳したいテキストを考え出します。 T5 の場合、作業中のタスクに応じて入力に接頭辞を付ける必要があります。英語からフランス語に翻訳する場合は、以下に示すように入力に接頭辞を付ける必要があります。 ```py >>> text = "translate English to French: Legumes share resources with nitrogen-fixing bacteria." ``` 推論用に微調整されたモデルを試す最も簡単な方法は、それを [`pipeline`] で使用することです。モデルを使用して翻訳用の`pipeline`をインスタンス化し、テキストをそれに渡します。 ```py >>> from transformers import pipeline >>> translator = pipeline("translation", model="my_awesome_opus_books_model") >>> translator(text) [{'translation_text': 'Legumes partagent des ressources avec des bactéries azotantes.'}] ``` 必要に応じて、`pipeline`の結果を手動で複製することもできます。 <frameworkcontent> <pt> テキストをトークン化し、`input_ids` を PyTorch テンソルとして返します。 ```py >>> from transformers import AutoTokenizer >>> tokenizer = AutoTokenizer.from_pretrained("my_awesome_opus_books_model") >>> inputs = tokenizer(text, return_tensors="pt").input_ids ``` [`~transformers.generation_utils.GenerationMixin.generate`] メソッドを使用して翻訳を作成します。さまざまなテキスト生成戦略と生成を制御するためのパラメーターの詳細については、[Text Generation](../main_classes/text_generation) API を確認してください。 ```py >>> from transformers import AutoModelForSeq2SeqLM >>> model = AutoModelForSeq2SeqLM.from_pretrained("my_awesome_opus_books_model") >>> outputs = model.generate(inputs, max_new_tokens=40, do_sample=True, top_k=30, top_p=0.95) ``` 生成されたトークン ID をデコードしてテキストに戻します。 ```py >>> tokenizer.decode(outputs[0], skip_special_tokens=True) 'Les lignées partagent des ressources avec des bactéries enfixant l'azote.' ``` </pt> <tf> `input_ids`を TensorFlow テンソルとして返します。 tensors: ```py >>> from transformers import AutoTokenizer >>> tokenizer = AutoTokenizer.from_pretrained("my_awesome_opus_books_model") >>> inputs = tokenizer(text, return_tensors="tf").input_ids ``` [`~transformers.generation_tf_utils.TFGenerationMixin.generate`] メソッドを使用して翻訳を作成します。さまざまなテキスト生成戦略と生成を制御するためのパラメーターの詳細については、[Text Generation](../main_classes/text_generation) API を確認してください。 ```py >>> from transformers import TFAutoModelForSeq2SeqLM >>> model = TFAutoModelForSeq2SeqLM.from_pretrained("my_awesome_opus_books_model") >>> outputs = model.generate(inputs, max_new_tokens=40, do_sample=True, top_k=30, top_p=0.95) ``` 生成されたトークン ID をデコードしてテキストに戻します。 ```py >>> tokenizer.decode(outputs[0], skip_special_tokens=True) 'Les lugumes partagent les ressources avec des bactéries fixatrices d'azote.' ``` </tf> </frameworkcontent>

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# 🤗 Accelerate를 활용한 분산 학습[[distributed-training-with-accelerate]] 모델이 커지면서 병렬 처리는 제한된 하드웨어에서 더 큰 모델을 훈련하고 훈련 속도를 몇 배로 가속화하기 위한 전략으로 등장했습니다. Hugging Face에서는 사용자가 하나의 머신에 여러 개의 GPU를 사용하든 여러 머신에 여러 개의 GPU를 사용하든 모든 유형의 분산 설정에서 🤗 Transformers 모델을 쉽게 훈련할 수 있도록 돕기 위해 [🤗 Accelerate](https://huggingface.co/docs/accelerate) 라이브러리를 만들었습니다. 이 튜토리얼에서는 분산 환경에서 훈련할 수 있도록 기본 PyTorch 훈련 루프를 커스터마이즈하는 방법을 알아봅시다. ## 설정[[setup]] 🤗 Accelerate 설치 시작하기: ```bash pip install accelerate ``` 그 다음, [`~accelerate.Accelerator`] 객체를 불러오고 생성합니다. [`~accelerate.Accelerator`]는 자동으로 분산 설정 유형을 감지하고 훈련에 필요한 모든 구성 요소를 초기화합니다. 장치에 모델을 명시적으로 배치할 필요는 없습니다. ```py >>> from accelerate import Accelerator >>> accelerator = Accelerator() ``` ## 가속화를 위한 준비[[prepare-to-accelerate]] 다음 단계는 관련된 모든 훈련 객체를 [`~accelerate.Accelerator.prepare`] 메소드에 전달하는 것입니다. 여기에는 훈련 및 평가 데이터로더, 모델 및 옵티마이저가 포함됩니다: ```py >>> train_dataloader, eval_dataloader, model, optimizer = accelerator.prepare( ... train_dataloader, eval_dataloader, model, optimizer ... ) ``` ## 백워드(Backward)[[backward]] 마지막으로 훈련 루프의 일반적인 `loss.backward()`를 🤗 Accelerate의 [`~accelerate.Accelerator.backward`] 메소드로 대체하기만 하면 됩니다: ```py >>> for epoch in range(num_epochs): ... for batch in train_dataloader: ... outputs = model(**batch) ... loss = outputs.loss ... accelerator.backward(loss) ... optimizer.step() ... lr_scheduler.step() ... optimizer.zero_grad() ... progress_bar.update(1) ``` 다음 코드에서 볼 수 있듯이, 훈련 루프에 코드 네 줄만 추가하면 분산 학습을 활성화할 수 있습니다! ```diff + from accelerate import Accelerator from transformers import AdamW, AutoModelForSequenceClassification, get_scheduler + accelerator = Accelerator() model = AutoModelForSequenceClassification.from_pretrained(checkpoint, num_labels=2) optimizer = AdamW(model.parameters(), lr=3e-5) - device = torch.device("cuda") if torch.cuda.is_available() else torch.device("cpu") - model.to(device) + train_dataloader, eval_dataloader, model, optimizer = accelerator.prepare( + train_dataloader, eval_dataloader, model, optimizer + ) num_epochs = 3 num_training_steps = num_epochs * len(train_dataloader) lr_scheduler = get_scheduler( "linear", optimizer=optimizer, num_warmup_steps=0, num_training_steps=num_training_steps ) progress_bar = tqdm(range(num_training_steps)) model.train() for epoch in range(num_epochs): for batch in train_dataloader: - batch = {k: v.to(device) for k, v in batch.items()} outputs = model(**batch) loss = outputs.loss - loss.backward() + accelerator.backward(loss) optimizer.step() lr_scheduler.step() optimizer.zero_grad() progress_bar.update(1) ``` ## 학습[[train]] 관련 코드를 추가한 후에는 스크립트나 Colaboratory와 같은 노트북에서 훈련을 시작하세요. ### 스크립트로 학습하기[[train-with-a-script]] 스크립트에서 훈련을 실행하는 경우, 다음 명령을 실행하여 구성 파일을 생성하고 저장합니다: ```bash accelerate config ``` Then launch your training with: ```bash accelerate launch train.py ``` ### 노트북으로 학습하기[[train-with-a-notebook]] Collaboratory의 TPU를 사용하려는 경우, 노트북에서도 🤗 Accelerate를 실행할 수 있습니다. 훈련을 담당하는 모든 코드를 함수로 감싸서 [`~accelerate.notebook_launcher`]에 전달하세요: ```py >>> from accelerate import notebook_launcher >>> notebook_launcher(training_function) ``` 🤗 Accelerate 및 다양한 기능에 대한 자세한 내용은 [documentation](https://huggingface.co/docs/accelerate)를 참조하세요.

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# 단일 GPU에서 효율적인 추론 [[efficient-inference-on-a-single-gpu]] 이 가이드 외에도, [단일 GPU에서의 훈련 가이드](perf_train_gpu_one)와 [CPU에서의 추론 가이드](perf_infer_cpu)에서도 관련 정보를 찾을 수 있습니다. ## Better Transformer: PyTorch 네이티브 Transformer 패스트패스 [[better-transformer-pytorchnative-transformer-fastpath]] PyTorch 네이티브 [`nn.MultiHeadAttention`](https://pytorch.org/blog/a-better-transformer-for-fast-transformer-encoder-inference/) 어텐션 패스트패스인 BetterTransformer는 [🤗 Optimum 라이브러리](https://huggingface.co/docs/optimum/bettertransformer/overview)의 통합을 통해 Transformers와 함께 사용할 수 있습니다. PyTorch의 어텐션 패스트패스는 커널 퓨전과 [중첩된 텐서](https://pytorch.org/docs/stable/nested.html)의 사용을 통해 추론 속도를 높일 수 있습니다. 자세한 벤치마크는 [이 블로그 글](https://medium.com/pytorch/bettertransformer-out-of-the-box-performance-for-huggingface-transformers-3fbe27d50ab2)에서 확인할 수 있습니다. [`optimum`](https://github.com/huggingface/optimum) 패키지를 설치한 후에는 추론 중 Better Transformer를 사용할 수 있도록 [`~PreTrainedModel.to_bettertransformer`]를 호출하여 관련 내부 모듈을 대체합니다: ```python model = model.to_bettertransformer() ``` [`~PreTrainedModel.reverse_bettertransformer`] 메소드는 정규화된 transformers 모델링을 사용하기 위해 모델을 저장하기 전 원래의 모델링으로 돌아갈 수 있도록 해줍니다: ```python model = model.reverse_bettertransformer() model.save_pretrained("saved_model") ``` PyTorch 2.0부터는 어텐션 패스트패스가 인코더와 디코더 모두에서 지원됩니다. 지원되는 아키텍처 목록은 [여기](https://huggingface.co/docs/optimum/bettertransformer/overview#supported-models)에서 확인할 수 있습니다. ## FP4 혼합 정밀도 추론을 위한 `bitsandbytes` 통합 [[bitsandbytes-integration-for-fp4-mixedprecision-inference]] `bitsandbytes`를 설치하면 GPU에서 손쉽게 모델을 압축할 수 있습니다. FP4 양자화를 사용하면 원래의 전체 정밀도 버전과 비교하여 모델 크기를 최대 8배 줄일 수 있습니다. 아래에서 시작하는 방법을 확인하세요. <Tip> 이 기능은 다중 GPU 설정에서도 사용할 수 있습니다. </Tip> ### 요구 사항 [[requirements-for-fp4-mixedprecision-inference]] - 최신 `bitsandbytes` 라이브러리 `pip install bitsandbytes>=0.39.0` - 최신 `accelerate`를 소스에서 설치 `pip install git+https://github.com/huggingface/accelerate.git` - 최신 `transformers`를 소스에서 설치 `pip install git+https://github.com/huggingface/transformers.git` ### FP4 모델 실행 - 단일 GPU 설정 - 빠른 시작 [[running-fp4-models-single-gpu-setup-quickstart]] 다음 코드를 실행하여 단일 GPU에서 빠르게 FP4 모델을 실행할 수 있습니다. ```py from transformers import AutoModelForCausalLM model_name = "bigscience/bloom-2b5" model_4bit = AutoModelForCausalLM.from_pretrained(model_name, device_map="auto", load_in_4bit=True) ``` `device_map`은 선택 사항입니다. 그러나 `device_map = 'auto'`로 설정하는 것이 사용 가능한 리소스를 효율적으로 디스패치하기 때문에 추론에 있어 권장됩니다. ### FP4 모델 실행 - 다중 GPU 설정 [[running-fp4-models-multi-gpu-setup]] 다중 GPU에서 혼합 4비트 모델을 가져오는 방법은 단일 GPU 설정과 동일합니다(동일한 명령어 사용): ```py model_name = "bigscience/bloom-2b5" model_4bit = AutoModelForCausalLM.from_pretrained(model_name, device_map="auto", load_in_4bit=True) ``` 하지만 `accelerate`를 사용하여 각 GPU에 할당할 GPU RAM을 제어할 수 있습니다. 다음과 같이 `max_memory` 인수를 사용하세요: ```py max_memory_mapping = {0: "600MB", 1: "1GB"} model_name = "bigscience/bloom-3b" model_4bit = AutoModelForCausalLM.from_pretrained( model_name, device_map="auto", load_in_4bit=True, max_memory=max_memory_mapping ) ``` 이 예에서는 첫 번째 GPU가 600MB의 메모리를 사용하고 두 번째 GPU가 1GB를 사용합니다. ### 고급 사용법 [[advanced-usage]] 이 방법의 더 고급 사용법에 대해서는 [양자화](main_classes/quantization) 문서 페이지를 참조하세요. ## Int8 혼합 정밀도 행렬 분해를 위한 `bitsandbytes` 통합 [[bitsandbytes-integration-for-int8-mixedprecision-matrix-decomposition]] <Tip> 이 기능은 다중 GPU 설정에서도 사용할 수 있습니다. </Tip> [`LLM.int8() : 8-bit Matrix Multiplication for Transformers at Scale`](https://arxiv.org/abs/2208.07339) 논문에서 우리는 몇 줄의 코드로 Hub의 모든 모델에 대한 Hugging Face 통합을 지원합니다. 이 방법은 `float16` 및 `bfloat16` 가중치에 대해 `nn.Linear` 크기를 2배로 줄이고, `float32` 가중치에 대해 4배로 줄입니다. 이는 절반 정밀도에서 이상치를 처리함으로써 품질에 거의 영향을 미치지 않습니다. ![HFxbitsandbytes.png](https://cdn-uploads.huggingface.co/production/uploads/1659861207959-62441d1d9fdefb55a0b7d12c.png) Int8 혼합 정밀도 행렬 분해는 행렬 곱셈을 두 개의 스트림으로 분리합니다: (1) fp16로 곱해지는 체계적인 특이값 이상치 스트림 행렬(0.01%) 및 (2) int8 행렬 곱셈의 일반적인 스트림(99.9%). 이 방법을 사용하면 매우 큰 모델에 대해 예측 저하 없이 int8 추론이 가능합니다. 이 방법에 대한 자세한 내용은 [논문](https://arxiv.org/abs/2208.07339)이나 [통합에 관한 블로그 글](https://huggingface.co/blog/hf-bitsandbytes-integration)에서 확인할 수 있습니다. ![MixedInt8.gif](https://cdn-uploads.huggingface.co/production/uploads/1660567469965-62441d1d9fdefb55a0b7d12c.gif) 커널은 GPU 전용으로 컴파일되어 있기 때문에 혼합 8비트 모델을 실행하려면 GPU가 필요합니다. 이 기능을 사용하기 전에 모델의 1/4(또는 모델 가중치가 절반 정밀도인 경우 절반)을 저장할 충분한 GPU 메모리가 있는지 확인하세요. 이 모듈을 사용하는 데 도움이 되는 몇 가지 참고 사항이 아래에 나와 있습니다. 또는 [Google colab](#colab-demos)에서 데모를 따라할 수도 있습니다. ### 요구 사항 [[requirements-for-int8-mixedprecision-matrix-decomposition]] - `bitsandbytes<0.37.0`을 사용하는 경우, 8비트 텐서 코어(Turing, Ampere 또는 이후 아키텍처 - 예: T4, RTX20s RTX30s, A40-A100)를 지원하는 NVIDIA GPU에서 실행하는지 확인하세요. `bitsandbytes>=0.37.0`을 사용하는 경우, 모든 GPU가 지원됩니다. - 올바른 버전의 `bitsandbytes`를 다음 명령으로 설치하세요: `pip install bitsandbytes>=0.31.5` - `accelerate`를 설치하세요 `pip install accelerate>=0.12.0` ### 혼합 Int8 모델 실행 - 단일 GPU 설정 [[running-mixedint8-models-single-gpu-setup]] 필요한 라이브러리를 설치한 후 혼합 8비트 모델을 가져오는 방법은 다음과 같습니다: ```py from transformers import AutoModelForCausalLM model_name = "bigscience/bloom-2b5" model_8bit = AutoModelForCausalLM.from_pretrained(model_name, device_map="auto", load_in_8bit=True) ``` 텍스트 생성의 경우: * `pipeline()` 함수 대신 모델의 `generate()` 메소드를 사용하는 것을 권장합니다. `pipeline()` 함수로는 추론이 가능하지만, 혼합 8비트 모델에 최적화되지 않았기 때문에 `generate()` 메소드를 사용하는 것보다 느릴 수 있습니다. 또한, nucleus 샘플링과 같은 일부 샘플링 전략은 혼합 8비트 모델에 대해 `pipeline()` 함수에서 지원되지 않습니다. * 입력을 모델과 동일한 GPU에 배치하는 것이 좋습니다. 다음은 간단한 예입니다: ```py from transformers import AutoModelForCausalLM, AutoTokenizer model_name = "bigscience/bloom-2b5" tokenizer = AutoTokenizer.from_pretrained(model_name) model_8bit = AutoModelForCausalLM.from_pretrained(model_name, device_map="auto", load_in_8bit=True) prompt = "Hello, my llama is cute" inputs = tokenizer(prompt, return_tensors="pt").to("cuda") generated_ids = model.generate(**inputs) outputs = tokenizer.batch_decode(generated_ids, skip_special_tokens=True) ``` ### 혼합 Int8 모델 실행 - 다중 GPU 설정 [[running-mixedint8-models-multi-gpu-setup]] 다중 GPU에서 혼합 8비트 모델을 로드하는 방법은 단일 GPU 설정과 동일합니다(동일한 명령어 사용): ```py model_name = "bigscience/bloom-2b5" model_8bit = AutoModelForCausalLM.from_pretrained(model_name, device_map="auto", load_in_8bit=True) ``` 하지만 `accelerate`를 사용하여 각 GPU에 할당할 GPU RAM을 제어할 수 있습니다. 다음과 같이 `max_memory` 인수를 사용하세요: ```py max_memory_mapping = {0: "1GB", 1: "2GB"} model_name = "bigscience/bloom-3b" model_8bit = AutoModelForCausalLM.from_pretrained( model_name, device_map="auto", load_in_8bit=True, max_memory=max_memory_mapping ) ``` 이 예시에서는 첫 번째 GPU가 1GB의 메모리를 사용하고 두 번째 GPU가 2GB를 사용합니다. ### Colab 데모 [[colab-demos]] 이 방법을 사용하면 이전에 Google Colab에서 추론할 수 없었던 모델에 대해 추론할 수 있습니다. Google Colab에서 8비트 양자화를 사용하여 T5-11b(42GB in fp32)를 실행하는 데모를 확인하세요: [![Open In Colab: T5-11b demo](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/drive/1YORPWx4okIHXnjW7MSAidXN29mPVNT7F?usp=sharing) 또는 BLOOM-3B에 대한 데모를 확인하세요: [![Open In Colab: BLOOM-3b demo](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/drive/1qOjXfQIAULfKvZqwCen8-MoWKGdSatZ4?usp=sharing)

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# 🤗 Transformers로 할 수 있는 것[[what__transformers_can_do]] 🤗 Transformers는 자연어처리(NLP), 컴퓨터 비전, 오디오 및 음성 처리 작업에 대한 사전훈련된 최첨단 모델 라이브러리입니다. 이 라이브러리는 트랜스포머 모델뿐만 아니라 컴퓨터 비전 작업을 위한 현대적인 합성곱 신경망과 같은 트랜스포머가 아닌 모델도 포함하고 있습니다. 스마트폰, 앱, 텔레비전과 같은 오늘날 가장 인기 있는 소비자 제품을 살펴보면, 딥러닝 기술이 그 뒤에 사용되고 있을 확률이 높습니다. 스마트폰으로 촬영한 사진에서 배경 객체를 제거하고 싶다면 어떻게 할까요? 이는 파놉틱 세그멘테이션 작업의 예입니다(아직 이게 무엇인지 모른다면, 다음 섹션에서 설명하겠습니다!). 이 페이지는 다양한 음성 및 오디오, 컴퓨터 비전, NLP 작업을 🤗 Transformers 라이브러리를 활용하여 다루는 간단한 예제를 3줄의 코드로 제공합니다. ## 오디오[[audio]] 음성 및 오디오 처리 작업은 다른 모달리티와 약간 다릅니다. 이는 주로 오디오가 연속적인 신호로 입력되기 때문입니다. 텍스트와 달리 원본 오디오 파형(waveform)은 문장이 단어로 나눠지는 것처럼 깔끔하게 이산적인 묶음으로 나눌 수 없습니다. 이를 극복하기 위해 원본 오디오 신호는 일정한 간격으로 샘플링됩니다. 해당 간격 내에서 더 많은 샘플을 취할 경우 샘플링률이 높아지며, 오디오는 원본 오디오 소스에 더 가까워집니다. 과거의 접근 방식은 오디오에서 유용한 특징을 추출하기 위해 오디오를 전처리하는 것이었습니다. 하지만 현재는 원본 오디오 파형을 특성 인코더에 직접 넣어서 오디오 표현(representation)을 추출하는 것이 더 일반적입니다. 이렇게 하면 전처리 단계가 단순해지고 모델이 가장 중요한 특징을 학습할 수 있습니다. ### 오디오 분류[[audio_classification]] 오디오 분류는 오디오 데이터에 미리 정의된 클래스 집합의 레이블을 지정하는 작업입니다. 이는 많은 구체적인 응용 프로그램을 포함한 넓은 범주입니다. 일부 예시는 다음과 같습니다: * 음향 장면 분류: 오디오에 장면 레이블("사무실", "해변", "경기장")을 지정합니다. * 음향 이벤트 감지: 오디오에 소리 이벤트 레이블("차 경적", "고래 울음소리", "유리 파손")을 지정합니다. * 태깅: 여러 가지 소리(새 지저귐, 회의에서의 화자 식별)가 포함된 오디오에 레이블을 지정합니다. * 음악 분류: 음악에 장르 레이블("메탈", "힙합", "컨트리")을 지정합니다. ```py >>> from transformers import pipeline >>> classifier = pipeline(task="audio-classification", model="superb/hubert-base-superb-er") >>> preds = classifier("https://huggingface.co/datasets/Narsil/asr_dummy/resolve/main/mlk.flac") >>> preds = [{"score": round(pred["score"], 4), "label": pred["label"]} for pred in preds] >>> preds [{'score': 0.4532, 'label': 'hap'}, {'score': 0.3622, 'label': 'sad'}, {'score': 0.0943, 'label': 'neu'}, {'score': 0.0903, 'label': 'ang'}] ``` ### 자동 음성 인식[[automatic_speech_recognition]] 자동 음성 인식(ASR)은 음성을 텍스트로 변환하는 작업입니다. 음성은 인간의 자연스러운 의사소통 형태이기 때문에 ASR은 가장 일반적인 오디오 작업 중 하나입니다. 오늘날 ASR 시스템은 스피커, 전화 및 자동차와 같은 "스마트" 기술 제품에 내장되어 있습니다. 우리는 가상 비서에게 음악 재생, 알림 설정 및 날씨 정보를 요청할 수 있습니다. 하지만 트랜스포머 아키텍처가 해결하는 데 도움을 준 핵심 도전 과제 중 하나는 양이 데이터 양이 적은 언어(low-resource language)에 대한 것입니다. 대량의 음성 데이터로 사전 훈련한 후 데이터 양이 적은 언어에서 레이블이 지정된 음성 데이터 1시간만으로 모델을 미세 조정하면 이전의 100배 많은 레이블이 지정된 데이터로 훈련된 ASR 시스템보다 훨씬 더 높은 품질의 결과를 얻을 수 있습니다. ```py >>> from transformers import pipeline >>> transcriber = pipeline(task="automatic-speech-recognition", model="openai/whisper-small") >>> transcriber("https://huggingface.co/datasets/Narsil/asr_dummy/resolve/main/mlk.flac") {'text': ' I have a dream that one day this nation will rise up and live out the true meaning of its creed.'} ``` ## 컴퓨터 비전[[computer_vision]] 컴퓨터 비전 작업 중 가장 초기의 성공적인 작업 중 하나는 [합성곱 신경망(CNN)](glossary#convolution)을 사용하여 우편번호 숫자 이미지를 인식하는 것이었습니다. 이미지는 픽셀로 구성되어 있으며 각 픽셀은 숫자 값으로 표현됩니다. 이로써 이미지를 픽셀 값의 행렬로 나타내는 것이 쉬워집니다. 특정한 픽셀 값의 조합은 이미지의 색상을 의미합니다. 컴퓨터 비전 작업은 일반적으로 다음 두 가지 방법으로 접근 가능합니다: 1. 합성곱을 사용하여 이미지의 낮은 수준 특징에서 높은 수준의 추상적인 요소까지 계층적으로 학습합니다. 2. 이미지를 패치로 나누고 트랜스포머를 사용하여 점진적으로 각 이미지 패치가 서로 어떠한 방식으로 연관되어 이미지를 형성하는지 학습합니다. `CNN`에서 선호하는 상향식 접근법과는 달리, 이 방식은 흐릿한 이미지로 초안을 그리고 점진적으로 선명한 이미지로 만들어가는 것과 유사합니다. ### 이미지 분류[[image_classification]] 이미지 분류는 한 개의 전체 이미지에 미리 정의된 클래스 집합의 레이블을 지정하는 작업입니다. 대부분의 분류 작업과 마찬가지로, 이미지 분류에는 다양한 실용적인 용도가 있으며, 일부 예시는 다음과 같습니다: * 의료: 질병을 감지하거나 환자 건강을 모니터링하기 위해 의료 이미지에 레이블을 지정합니다. * 환경: 위성 이미지를 분류하여 산림 벌채를 감시하고 야생 지역 관리를 위한 정보를 제공하거나 산불을 감지합니다. * 농업: 작물 이미지를 분류하여 식물 건강을 확인하거나 위성 이미지를 분류하여 토지 이용 관찰에 사용합니다. * 생태학: 동물이나 식물 종 이미지를 분류하여 야생 동물 개체군을 조사하거나 멸종 위기에 처한 종을 추적합니다. ```py >>> from transformers import pipeline >>> classifier = pipeline(task="image-classification") >>> preds = classifier( ... "https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/pipeline-cat-chonk.jpeg" ... ) >>> preds = [{"score": round(pred["score"], 4), "label": pred["label"]} for pred in preds] >>> print(*preds, sep="\n") {'score': 0.4335, 'label': 'lynx, catamount'} {'score': 0.0348, 'label': 'cougar, puma, catamount, mountain lion, painter, panther, Felis concolor'} {'score': 0.0324, 'label': 'snow leopard, ounce, Panthera uncia'} {'score': 0.0239, 'label': 'Egyptian cat'} {'score': 0.0229, 'label': 'tiger cat'} ``` ### 객체 탐지[[object_detection]] 이미지 분류와 달리 객체 탐지는 이미지 내에서 여러 객체를 식별하고 바운딩 박스로 정의된 객체의 위치를 파악합니다. 객체 탐지의 몇 가지 응용 예시는 다음과 같습니다: * 자율 주행 차량: 다른 차량, 보행자 및 신호등과 같은 일상적인 교통 객체를 감지합니다. * 원격 감지: 재난 모니터링, 도시 계획 및 기상 예측 등을 수행합니다. * 결함 탐지: 건물의 균열이나 구조적 손상, 제조 결함 등을 탐지합니다. ```py >>> from transformers import pipeline >>> detector = pipeline(task="object-detection") >>> preds = detector( ... "https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/pipeline-cat-chonk.jpeg" ... ) >>> preds = [{"score": round(pred["score"], 4), "label": pred["label"], "box": pred["box"]} for pred in preds] >>> preds [{'score': 0.9865, 'label': 'cat', 'box': {'xmin': 178, 'ymin': 154, 'xmax': 882, 'ymax': 598}}] ``` ### 이미지 분할[[image_segmentation]] 이미지 분할은 픽셀 차원의 작업으로, 이미지 내의 모든 픽셀을 클래스에 할당합니다. 이는 객체 탐지와 다릅니다. 객체 탐지는 바운딩 박스를 사용하여 이미지 내의 객체를 레이블링하고 예측하는 반면, 분할은 더 세분화된 작업입니다. 분할은 픽셀 수준에서 객체를 감지할 수 있습니다. 이미지 분할에는 여러 유형이 있습니다: * 인스턴스 분할: 개체의 클래스를 레이블링하는 것 외에도, 개체의 각 구분된 인스턴스에도 레이블을 지정합니다 ("개-1", "개-2" 등). * 파놉틱 분할: 의미적 분할과 인스턴스 분할의 조합입니다. 각 픽셀을 의미적 클래스로 레이블링하는 **동시에** 개체의 각각 구분된 인스턴스로도 레이블을 지정합니다. 분할 작업은 자율 주행 차량에서 유용하며, 주변 환경의 픽셀 수준 지도를 생성하여 보행자와 다른 차량 주변에서 안전하게 탐색할 수 있습니다. 또한 의료 영상에서도 유용합니다. 분할 작업이 픽셀 수준에서 객체를 감지할 수 있기 때문에 비정상적인 세포나 장기의 특징을 식별하는 데 도움이 될 수 있습니다. 이미지 분할은 의류 가상 시착이나 카메라를 통해 실제 세계에 가상 개체를 덧씌워 증강 현실 경험을 만드는 등 전자 상거래 분야에서도 사용될 수 있습니다. ```py >>> from transformers import pipeline >>> segmenter = pipeline(task="image-segmentation") >>> preds = segmenter( ... "https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/pipeline-cat-chonk.jpeg" ... ) >>> preds = [{"score": round(pred["score"], 4), "label": pred["label"]} for pred in preds] >>> print(*preds, sep="\n") {'score': 0.9879, 'label': 'LABEL_184'} {'score': 0.9973, 'label': 'snow'} {'score': 0.9972, 'label': 'cat'} ``` ### 깊이 추정[[depth_estimation]] 깊이 추정은 카메라로부터 이미지 내부의 각 픽셀의 거리를 예측합니다. 이 컴퓨터 비전 작업은 특히 장면 이해와 재구성에 중요합니다. 예를 들어, 자율 주행 차량은 보행자, 교통 표지판 및 다른 차량과 같은 객체와의 거리를 이해하여 장애물과 충돌을 피해야 합니다. 깊이 정보는 또한 2D 이미지에서 3D 표현을 구성하는 데 도움이 되며 생물학적 구조나 건물의 고품질 3D 표현을 생성하는 데 사용될 수 있습니다. 깊이 추정에는 두 가지 접근 방식이 있습니다: * 스테레오: 약간 다른 각도에서 촬영된 동일한 이미지 두 장을 비교하여 깊이를 추정합니다. * 단안: 단일 이미지에서 깊이를 추정합니다. ```py >>> from transformers import pipeline >>> depth_estimator = pipeline(task="depth-estimation") >>> preds = depth_estimator( ... "https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/pipeline-cat-chonk.jpeg" ... ) ``` ## 자연어처리[[natural_language_processing]] 텍스트는 인간이 의사 소통하는 자연스러운 방식 중 하나이기 때문에 자연어처리 역시 가장 일반적인 작업 유형 중 하나입니다. 모델이 인식하는 형식으로 텍스트를 변환하려면 토큰화해야 합니다. 이는 텍스트 시퀀스를 개별 단어 또는 하위 단어(토큰)로 분할한 다음 이러한 토큰을 숫자로 변환하는 것을 의미합니다. 결과적으로 텍스트 시퀀스를 숫자 시퀀스로 표현할 수 있으며, 숫자 시퀀스를 다양한 자연어처리 작업을 해결하기 위한 모델에 입력할 수 있습니다! ### 텍스트 분류[[text_classification]] 다른 모달리티에서의 분류 작업과 마찬가지로 텍스트 분류는 미리 정의된 클래스 집합에서 텍스트 시퀀스(문장 수준, 단락 또는 문서 등)에 레이블을 지정합니다. 텍스트 분류에는 다양한 실용적인 응용 사례가 있으며, 일부 예시는 다음과 같습니다: * 감성 분석: 텍스트를 `긍정` 또는 `부정`과 같은 어떤 극성에 따라 레이블링하여 정치, 금융, 마케팅과 같은 분야에서 의사 결정에 정보를 제공하고 지원할 수 있습니다. * 콘텐츠 분류: 텍스트를 주제에 따라 레이블링(날씨, 스포츠, 금융 등)하여 뉴스 및 소셜 미디어 피드에서 정보를 구성하고 필터링하는 데 도움이 될 수 있습니다. ```py >>> from transformers import pipeline >>> classifier = pipeline(task="sentiment-analysis") >>> preds = classifier("Hugging Face is the best thing since sliced bread!") >>> preds = [{"score": round(pred["score"], 4), "label": pred["label"]} for pred in preds] >>> preds [{'score': 0.9991, 'label': 'POSITIVE'}] ``` ### 토큰 분류[[token_classification]] 모든 자연어처리 작업에서는 텍스트가 개별 단어나 하위 단어로 분리되어 전처리됩니다. 분리된 단어를 [토큰](/glossary#token)이라고 합니다. 토큰 분류는 각 토큰에 미리 정의된 클래스 집합의 레이블을 할당합니다. 토큰 분류의 두 가지 일반적인 유형은 다음과 같습니다: * 개체명 인식 (NER): 토큰을 조직, 인물, 위치 또는 날짜와 같은 개체 범주에 따라 레이블링합니다. NER은 특히 유전체학적인 환경에서 유전자, 단백질 및 약물 이름에 레이블을 지정하는 데 널리 사용됩니다. * 품사 태깅 (POS): 명사, 동사, 형용사와 같은 품사에 따라 토큰에 레이블을 할당합니다. POS는 번역 시스템이 동일한 단어가 문법적으로 어떻게 다른지 이해하는 데 도움이 됩니다 (명사로 사용되는 "bank(은행)"과 동사로 사용되는 "bank(예금을 예치하다)"과 같은 경우). ```py >>> from transformers import pipeline >>> classifier = pipeline(task="ner") >>> preds = classifier("Hugging Face is a French company based in New York City.") >>> preds = [ ... { ... "entity": pred["entity"], ... "score": round(pred["score"], 4), ... "index": pred["index"], ... "word": pred["word"], ... "start": pred["start"], ... "end": pred["end"], ... } ... for pred in preds ... ] >>> print(*preds, sep="\n") {'entity': 'I-ORG', 'score': 0.9968, 'index': 1, 'word': 'Hu', 'start': 0, 'end': 2} {'entity': 'I-ORG', 'score': 0.9293, 'index': 2, 'word': '##gging', 'start': 2, 'end': 7} {'entity': 'I-ORG', 'score': 0.9763, 'index': 3, 'word': 'Face', 'start': 8, 'end': 12} {'entity': 'I-MISC', 'score': 0.9983, 'index': 6, 'word': 'French', 'start': 18, 'end': 24} {'entity': 'I-LOC', 'score': 0.999, 'index': 10, 'word': 'New', 'start': 42, 'end': 45} {'entity': 'I-LOC', 'score': 0.9987, 'index': 11, 'word': 'York', 'start': 46, 'end': 50} {'entity': 'I-LOC', 'score': 0.9992, 'index': 12, 'word': 'City', 'start': 51, 'end': 55} ``` ### 질의응답[[question_answering]] 질의응답은 또 하나의 토큰 차원의 작업으로, 문맥이 있을 때(개방형 도메인)와 문맥이 없을 때(폐쇄형 도메인) 질문에 대한 답변을 반환합니다. 이 작업은 가상 비서에게 식당이 영업 중인지와 같은 질문을 할 때마다 발생할 수 있습니다. 고객 지원 또는 기술 지원을 제공하거나 검색 엔진이 요청한 정보를 검색하는 데 도움을 줄 수 있습니다. 질문 답변에는 일반적으로 두 가지 유형이 있습니다: * 추출형: 질문과 문맥이 주어졌을 때, 모델이 주어진 문맥의 일부에서 가져온 텍스트의 범위를 답변으로 합니다. * 생성형: 질문과 문맥이 주어졌을 때, 주어진 문맥을 통해 답변을 생성합니다. 이 접근 방식은 [`QuestionAnsweringPipeline`] 대신 [`Text2TextGenerationPipeline`]을 통해 처리됩니다. ```py >>> from transformers import pipeline >>> question_answerer = pipeline(task="question-answering") >>> preds = question_answerer( ... question="What is the name of the repository?", ... context="The name of the repository is huggingface/transformers", ... ) >>> print( ... f"score: {round(preds['score'], 4)}, start: {preds['start']}, end: {preds['end']}, answer: {preds['answer']}" ... ) score: 0.9327, start: 30, end: 54, answer: huggingface/transformers ``` ### 요약[[summarization]] 요약은 원본 문서의 의미를 최대한 보존하면서 긴 문서를 짧은 문서로 만드는 작업입니다. 요약은 `sequence-to-sequence` 작업입니다. 입력보다 짧은 텍스트 시퀀스를 출력합니다. 요약 작업은 독자가 장문 문서들의 주요 포인트를 빠르게 이해하는 데 도움을 줄 수 있습니다. 입법안, 법률 및 금융 문서, 특허 및 과학 논문은 요약 작업이 독자의 시간을 절약하고 독서 보조 도구로 사용될 수 있는 몇 가지 예시입니다. 질문 답변과 마찬가지로 요약에는 두 가지 유형이 있습니다: * 추출형: 원본 텍스트에서 가장 중요한 문장을 식별하고 추출합니다. * 생성형: 원본 텍스트에서 목표 요약을 생성합니다. 입력 문서에 없는 새로운 단어를 포함할 수도 있습니다. [`SummarizationPipeline`]은 생성형 접근 방식을 사용합니다. ```py >>> from transformers import pipeline >>> summarizer = pipeline(task="summarization") >>> summarizer( ... "In this work, we presented the Transformer, the first sequence transduction model based entirely on attention, replacing the recurrent layers most commonly used in encoder-decoder architectures with multi-headed self-attention. For translation tasks, the Transformer can be trained significantly faster than architectures based on recurrent or convolutional layers. On both WMT 2014 English-to-German and WMT 2014 English-to-French translation tasks, we achieve a new state of the art. In the former task our best model outperforms even all previously reported ensembles." ... ) [{'summary_text': ' The Transformer is the first sequence transduction model based entirely on attention . It replaces the recurrent layers most commonly used in encoder-decoder architectures with multi-headed self-attention . For translation tasks, the Transformer can be trained significantly faster than architectures based on recurrent or convolutional layers .'}] ``` ### 번역[[translation]] 번역은 한 언어로 된 텍스트 시퀀스를 다른 언어로 변환하는 작업입니다. 이는 서로 다른 배경을 가진 사람들이 서로 소통하는 데 도움을 주는 중요한 역할을 합니다. 더 넓은 대중에게 콘텐츠를 번역하여 전달하거나, 새로운 언어를 배우는 데 도움이 되는 학습 도구가 될 수도 있습니다. 요약과 마찬가지로, 번역은 `sequence-to-sequence` 작업입니다. 즉, 모델은 입력 시퀀스를 받아서 출력이 되는 목표 시퀀스를 반환합니다. 초기의 번역 모델은 대부분 단일 언어로 이루어져 있었지만, 최근에는 많은 언어 쌍 간에 번역을 수행할 수 있는 다중 언어 모델에 대한 관심이 높아지고 있습니다. ```py >>> from transformers import pipeline >>> text = "translate English to French: Hugging Face is a community-based open-source platform for machine learning." >>> translator = pipeline(task="translation", model="google-t5/t5-small") >>> translator(text) [{'translation_text': "Hugging Face est une tribune communautaire de l'apprentissage des machines."}] ``` ### 언어 모델링[[language_modeling]] 언어 모델링은 텍스트 시퀀스에서 단어를 예측하는 작업입니다. 사전 훈련된 언어 모델은 많은 다른 하위 작업에 따라 미세 조정될 수 있기 때문에 매우 인기 있는 자연어처리 작업이 되었습니다. 최근에는 제로 샷(zero-shot) 또는 퓨 샷(few-shot) 학습이 가능한 대규모 언어 모델(Large Language Models, LLM)에 대한 많은 관심이 발생하고 있습니다. 이는 모델이 명시적으로 훈련되지 않은 작업도 해결할 수 있다는 것을 의미합니다! 언어 모델은 유창하고 설득력 있는 텍스트를 생성하는 데 사용될 수 있지만, 텍스트가 항상 정확하지는 않을 수 있으므로 주의가 필요합니다. 언어 모델링에는 두 가지 유형이 있습니다: * 인과적 언어 모델링: 이 모델의 목적은 시퀀스에서 다음 토큰을 예측하는 것이며, 미래 토큰이 마스킹 됩니다. ```py >>> from transformers import pipeline >>> prompt = "Hugging Face is a community-based open-source platform for machine learning." >>> generator = pipeline(task="text-generation") >>> generator(prompt) # doctest: +SKIP ``` * 마스킹된 언어 모델링: 이 모델의 목적은 시퀀스 내의 마스킹된 토큰을 예측하는 것이며, 시퀀스 내의 모든 토큰에 대한 접근이 제공됩니다. ```py >>> text = "Hugging Face is a community-based open-source <mask> for machine learning." >>> fill_mask = pipeline(task="fill-mask") >>> preds = fill_mask(text, top_k=1) >>> preds = [ ... { ... "score": round(pred["score"], 4), ... "token": pred["token"], ... "token_str": pred["token_str"], ... "sequence": pred["sequence"], ... } ... for pred in preds ... ] >>> preds [{'score': 0.2236, 'token': 1761, 'token_str': ' platform', 'sequence': 'Hugging Face is a community-based open-source platform for machine learning.'}] ``` 이 페이지를 통해 각 모달리티의 다양한 작업 유형과 각 작업의 실용적 중요성에 대해 추가적인 배경 정보를 얻으셨기를 바랍니다. 다음 [섹션](tasks_explained)에서는 🤗 Transformer가 이러한 작업을 해결하는 **방법**에 대해 알아보실 수 있습니다.

transformers/docs/source/ko/task_summary.md/0

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# 번역[[translation]] [[open-in-colab]] <Youtube id="1JvfrvZgi6c"/> 번역은 한 언어로 된 시퀀스를 다른 언어로 변환합니다. 번역이나 요약은 입력을 받아 일련의 출력을 반환하는 강력한 프레임워크인 시퀀스-투-시퀀스 문제로 구성할 수 있는 대표적인 태스크입니다. 번역 시스템은 일반적으로 다른 언어로 된 텍스트 간의 번역에 사용되지만, 음성 간의 통역이나 텍스트-음성 또는 음성-텍스트와 같은 조합에도 사용될 수 있습니다. 이 가이드에서 학습할 내용은: 1. 영어 텍스트를 프랑스어로 번역하기 위해 [T5](https://huggingface.co/google-t5/t5-small) 모델을 OPUS Books 데이터세트의 영어-프랑스어 하위 집합으로 파인튜닝하는 방법과 2. 파인튜닝된 모델을 추론에 사용하는 방법입니다. <Tip> 이 태스크 가이드는 아래 모델 아키텍처에도 응용할 수 있습니다.  [BART](../model_doc/bart), [BigBird-Pegasus](../model_doc/bigbird_pegasus), [Blenderbot](../model_doc/blenderbot), [BlenderbotSmall](../model_doc/blenderbot-small), [Encoder decoder](../model_doc/encoder-decoder), [FairSeq Machine-Translation](../model_doc/fsmt), [GPTSAN-japanese](../model_doc/gptsan-japanese), [LED](../model_doc/led), [LongT5](../model_doc/longt5), [M2M100](../model_doc/m2m_100), [Marian](../model_doc/marian), [mBART](../model_doc/mbart), [MT5](../model_doc/mt5), [MVP](../model_doc/mvp), [NLLB](../model_doc/nllb), [NLLB-MOE](../model_doc/nllb-moe), [Pegasus](../model_doc/pegasus), [PEGASUS-X](../model_doc/pegasus_x), [PLBart](../model_doc/plbart), [ProphetNet](../model_doc/prophetnet), [SwitchTransformers](../model_doc/switch_transformers), [T5](../model_doc/t5), [XLM-ProphetNet](../model_doc/xlm-prophetnet)  </Tip> 시작하기 전에 필요한 라이브러리가 모두 설치되어 있는지 확인하세요: ```bash pip install transformers datasets evaluate sacrebleu ``` 모델을 업로드하고 커뮤니티와 공유할 수 있도록 Hugging Face 계정에 로그인하는 것이 좋습니다. 새로운 창이 표시되면 토큰을 입력하여 로그인하세요. ```py >>> from huggingface_hub import notebook_login >>> notebook_login() ``` ## OPUS Books 데이터세트 가져오기[[load-opus-books-dataset]] 먼저 🤗 Datasets 라이브러리에서 [OPUS Books](https://huggingface.co/datasets/opus_books) 데이터세트의 영어-프랑스어 하위 집합을 가져오세요. ```py >>> from datasets import load_dataset >>> books = load_dataset("opus_books", "en-fr") ``` 데이터세트를 [`~datasets.Dataset.train_test_split`] 메서드를 사용하여 훈련 및 테스트 데이터로 분할하세요. ```py >>> books = books["train"].train_test_split(test_size=0.2) ``` 훈련 데이터에서 예시를 살펴볼까요? ```py >>> books["train"][0] {'id': '90560', 'translation': {'en': 'But this lofty plateau measured only a few fathoms, and soon we reentered Our Element.', 'fr': 'Mais ce plateau élevé ne mesurait que quelques toises, et bientôt nous fûmes rentrés dans notre élément.'}} ``` 반환된 딕셔너리의 `translation` 키가 텍스트의 영어, 프랑스어 버전을 포함하고 있는 것을 볼 수 있습니다. ## 전처리[[preprocess]] <Youtube id="XAR8jnZZuUs"/> 다음 단계로 영어-프랑스어 쌍을 처리하기 위해 T5 토크나이저를 가져오세요. ```py >>> from transformers import AutoTokenizer >>> checkpoint = "google-t5/t5-small" >>> tokenizer = AutoTokenizer.from_pretrained(checkpoint) ``` 만들 전처리 함수는 아래 요구사항을 충족해야 합니다: 1. T5가 번역 태스크임을 인지할 수 있도록 입력 앞에 프롬프트를 추가하세요. 여러 NLP 태스크를 할 수 있는 모델 중 일부는 이렇게 태스크 프롬프트를 미리 줘야합니다. 2. 원어(영어)과 번역어(프랑스어)를 별도로 토큰화하세요. 영어 어휘로 사전 학습된 토크나이저로 프랑스어 텍스트를 토큰화할 수는 없기 때문입니다. 3. `max_length` 매개변수로 설정한 최대 길이보다 길지 않도록 시퀀스를 truncate하세요. ```py >>> source_lang = "en" >>> target_lang = "fr" >>> prefix = "translate English to French: " >>> def preprocess_function(examples): ... inputs = [prefix + example[source_lang] for example in examples["translation"]] ... targets = [example[target_lang] for example in examples["translation"]] ... model_inputs = tokenizer(inputs, text_target=targets, max_length=128, truncation=True) ... return model_inputs ``` 전체 데이터세트에 전처리 함수를 적용하려면 🤗 Datasets의 [`~datasets.Dataset.map`] 메서드를 사용하세요. `map` 함수의 속도를 높이려면 `batched=True`를 설정하여 데이터세트의 여러 요소를 한 번에 처리하는 방법이 있습니다. ```py >>> tokenized_books = books.map(preprocess_function, batched=True) ``` 이제 [`DataCollatorForSeq2Seq`]를 사용하여 예제 배치를 생성합니다. 데이터세트의 최대 길이로 전부를 padding하는 대신, 데이터 정렬 중 각 배치의 최대 길이로 문장을 *동적으로 padding*하는 것이 더 효율적입니다. <frameworkcontent> <pt> ```py >>> from transformers import DataCollatorForSeq2Seq >>> data_collator = DataCollatorForSeq2Seq(tokenizer=tokenizer, model=checkpoint) ``` </pt> <tf> ```py >>> from transformers import DataCollatorForSeq2Seq >>> data_collator = DataCollatorForSeq2Seq(tokenizer=tokenizer, model=checkpoint, return_tensors="tf") ``` </tf> </frameworkcontent> ## 평가[[evalulate]] 훈련 중에 메트릭을 포함하면 모델의 성능을 평가하는 데 도움이 됩니다. 🤗 [Evaluate](https://huggingface.co/docs/evaluate/index) 라이브러리로 평가 방법(evaluation method)을 빠르게 가져올 수 있습니다. 현재 태스크에 적합한 SacreBLEU 메트릭을 가져오세요. (메트릭을 가져오고 계산하는 방법에 대해 자세히 알아보려면 🤗 Evaluate [둘러보기](https://huggingface.co/docs/evaluate/a_quick_tour)를 참조하세요): ```py >>> import evaluate >>> metric = evaluate.load("sacrebleu") ``` 그런 다음 [`~evaluate.EvaluationModule.compute`]에 예측값과 레이블을 전달하여 SacreBLEU 점수를 계산하는 함수를 생성하세요: ```py >>> import numpy as np >>> def postprocess_text(preds, labels): ... preds = [pred.strip() for pred in preds] ... labels = [[label.strip()] for label in labels] ... return preds, labels >>> def compute_metrics(eval_preds): ... preds, labels = eval_preds ... if isinstance(preds, tuple): ... preds = preds[0] ... decoded_preds = tokenizer.batch_decode(preds, skip_special_tokens=True) ... labels = np.where(labels != -100, labels, tokenizer.pad_token_id) ... decoded_labels = tokenizer.batch_decode(labels, skip_special_tokens=True) ... decoded_preds, decoded_labels = postprocess_text(decoded_preds, decoded_labels) ... result = metric.compute(predictions=decoded_preds, references=decoded_labels) ... result = {"bleu": result["score"]} ... prediction_lens = [np.count_nonzero(pred != tokenizer.pad_token_id) for pred in preds] ... result["gen_len"] = np.mean(prediction_lens) ... result = {k: round(v, 4) for k, v in result.items()} ... return result ``` 이제 `compute_metrics` 함수는 준비되었고, 훈련 과정을 설정할 때 다시 살펴볼 예정입니다. ## 훈련[[train]] <frameworkcontent> <pt> <Tip> [`Trainer`]로 모델을 파인튜닝하는 방법에 익숙하지 않다면 [여기](../training#train-with-pytorch-trainer)에서 기본 튜토리얼을 살펴보시기 바랍니다! </Tip> 모델을 훈련시킬 준비가 되었군요! [`AutoModelForSeq2SeqLM`]으로 T5를 로드하세요: ```py >>> from transformers import AutoModelForSeq2SeqLM, Seq2SeqTrainingArguments, Seq2SeqTrainer >>> model = AutoModelForSeq2SeqLM.from_pretrained(checkpoint) ``` 이제 세 단계만 거치면 끝입니다: 1. [`Seq2SeqTrainingArguments`]에서 훈련 하이퍼파라미터를 정의하세요. 유일한 필수 매개변수는 모델을 저장할 위치인 `output_dir`입니다. 모델을 Hub에 푸시하기 위해 `push_to_hub=True`로 설정하세요. (모델을 업로드하려면 Hugging Face에 로그인해야 합니다.) [`Trainer`]는 에폭이 끝날때마다 SacreBLEU 메트릭을 평가하고 훈련 체크포인트를 저장합니다. 2. [`Seq2SeqTrainer`]에 훈련 인수를 전달하세요. 모델, 데이터 세트, 토크나이저, data collator 및 `compute_metrics` 함수도 덩달아 전달해야 합니다. 3. [`~Trainer.train`]을 호출하여 모델을 파인튜닝하세요. ```py >>> training_args = Seq2SeqTrainingArguments( ... output_dir="my_awesome_opus_books_model", ... evaluation_strategy="epoch", ... learning_rate=2e-5, ... per_device_train_batch_size=16, ... per_device_eval_batch_size=16, ... weight_decay=0.01, ... save_total_limit=3, ... num_train_epochs=2, ... predict_with_generate=True, ... fp16=True, ... push_to_hub=True, ... ) >>> trainer = Seq2SeqTrainer( ... model=model, ... args=training_args, ... train_dataset=tokenized_books["train"], ... eval_dataset=tokenized_books["test"], ... tokenizer=tokenizer, ... data_collator=data_collator, ... compute_metrics=compute_metrics, ... ) >>> trainer.train() ``` 학습이 완료되면 [`~transformers.Trainer.push_to_hub`] 메서드로 모델을 Hub에 공유하세요. 이러면 누구나 모델을 사용할 수 있게 됩니다: ```py >>> trainer.push_to_hub() ``` </pt> <tf> <Tip> Keras로 모델을 파인튜닝하는 방법이 익숙하지 않다면, [여기](../training#train-a-tensorflow-model-with-keras)에서 기본 튜토리얼을 살펴보시기 바랍니다! </Tip> TensorFlow에서 모델을 파인튜닝하려면 우선 optimizer 함수, 학습률 스케줄 등의 훈련 하이퍼파라미터를 설정하세요: ```py >>> from transformers import AdamWeightDecay >>> optimizer = AdamWeightDecay(learning_rate=2e-5, weight_decay_rate=0.01) ``` 이제 [`TFAutoModelForSeq2SeqLM`]로 T5를 가져오세요: ```py >>> from transformers import TFAutoModelForSeq2SeqLM >>> model = TFAutoModelForSeq2SeqLM.from_pretrained(checkpoint) ``` [`~transformers.TFPreTrainedModel.prepare_tf_dataset`]로 데이터 세트를 `tf.data.Dataset` 형식으로 변환하세요: ```py >>> tf_train_set = model.prepare_tf_dataset( ... tokenized_books["train"], ... shuffle=True, ... batch_size=16, ... collate_fn=data_collator, ... ) >>> tf_test_set = model.prepare_tf_dataset( ... tokenized_books["test"], ... shuffle=False, ... batch_size=16, ... collate_fn=data_collator, ... ) ``` 훈련하기 위해 [`compile`](https://keras.io/api/models/model_training_apis/#compile-method) 메서드로 모델을 구성하세요: ```py >>> import tensorflow as tf >>> model.compile(optimizer=optimizer) ``` 훈련을 시작하기 전에 예측값으로부터 SacreBLEU 메트릭을 계산하는 방법과 모델을 Hub에 업로드하는 방법 두 가지를 미리 설정해둬야 합니다. 둘 다 [Keras callbacks](../main_classes/keras_callbacks)로 구현하세요. [`~transformers.KerasMetricCallback`]에 `compute_metrics` 함수를 전달하세요. ```py >>> from transformers.keras_callbacks import KerasMetricCallback >>> metric_callback = KerasMetricCallback(metric_fn=compute_metrics, eval_dataset=tf_validation_set) ``` 모델과 토크나이저를 업로드할 위치를 [`~transformers.PushToHubCallback`]에서 지정하세요: ```py >>> from transformers.keras_callbacks import PushToHubCallback >>> push_to_hub_callback = PushToHubCallback( ... output_dir="my_awesome_opus_books_model", ... tokenizer=tokenizer, ... ) ``` 이제 콜백들을 한데로 묶어주세요: ```py >>> callbacks = [metric_callback, push_to_hub_callback] ``` 드디어 모델을 훈련시킬 모든 준비를 마쳤군요! 이제 훈련 및 검증 데이터 세트에 [`fit`](https://keras.io/api/models/model_training_apis/#fit-method) 메서드를 에폭 수와 만들어둔 콜백과 함께 호출하여 모델을 파인튜닝하세요: ```py >>> model.fit(x=tf_train_set, validation_data=tf_test_set, epochs=3, callbacks=callbacks) ``` 학습이 완료되면 모델이 자동으로 Hub에 업로드되고, 누구나 사용할 수 있게 됩니다! </tf> </frameworkcontent> <Tip> 번역을 위해 모델을 파인튜닝하는 방법에 대한 보다 자세한 예제는 해당 [PyTorch 노트북](https://colab.research.google.com/github/huggingface/notebooks/blob/main/examples/translation.ipynb) 또는 [TensorFlow 노트북](https://colab.research.google.com/github/huggingface/notebooks/blob/main/examples/translation-tf.ipynb)을 참조하세요. </Tip> ## 추론[[inference]] 좋아요, 이제 모델을 파인튜닝했으니 추론에 사용할 수 있습니다! 다른 언어로 번역하고 싶은 텍스트를 써보세요. T5의 경우 원하는 태스크를 입력의 접두사로 추가해야 합니다. 예를 들어 영어에서 프랑스어로 번역하는 경우, 아래와 같은 접두사가 추가됩니다: ```py >>> text = "translate English to French: Legumes share resources with nitrogen-fixing bacteria." ``` 파인튜닝된 모델로 추론하기에 제일 간단한 방법은 [`pipeline`]을 사용하는 것입니다. 해당 모델로 번역 `pipeline`을 만든 뒤, 텍스트를 전달하세요: ```py >>> from transformers import pipeline >>> translator = pipeline("translation", model="my_awesome_opus_books_model") >>> translator(text) [{'translation_text': 'Legumes partagent des ressources avec des bactéries azotantes.'}] ``` 원한다면 `pipeline`의 결과를 직접 복제할 수도 있습니다: <frameworkcontent> <pt> 텍스트를 토큰화하고 `input_ids`를 PyTorch 텐서로 반환하세요: ```py >>> from transformers import AutoTokenizer >>> tokenizer = AutoTokenizer.from_pretrained("my_awesome_opus_books_model") >>> inputs = tokenizer(text, return_tensors="pt").input_ids ``` [`~transformers.generation_utils.GenerationMixin.generate`] 메서드로 번역을 생성하세요. 다양한 텍스트 생성 전략 및 생성을 제어하기 위한 매개변수에 대한 자세한 내용은 [Text Generation](../main_classes/text_generation) API를 살펴보시기 바랍니다. ```py >>> from transformers import AutoModelForSeq2SeqLM >>> model = AutoModelForSeq2SeqLM.from_pretrained("my_awesome_opus_books_model") >>> outputs = model.generate(inputs, max_new_tokens=40, do_sample=True, top_k=30, top_p=0.95) ``` 생성된 토큰 ID들을 다시 텍스트로 디코딩하세요: ```py >>> tokenizer.decode(outputs[0], skip_special_tokens=True) 'Les lignées partagent des ressources avec des bactéries enfixant l'azote.' ``` </pt> <tf> 텍스트를 토큰화하고 `input_ids`를 TensorFlow 텐서로 반환하세요: ```py >>> from transformers import AutoTokenizer >>> tokenizer = AutoTokenizer.from_pretrained("my_awesome_opus_books_model") >>> inputs = tokenizer(text, return_tensors="tf").input_ids ``` [`~transformers.generation_tf_utils.TFGenerationMixin.generate`] 메서드로 번역을 생성하세요. 다양한 텍스트 생성 전략 및 생성을 제어하기 위한 매개변수에 대한 자세한 내용은 [Text Generation](../main_classes/text_generation) API를 살펴보시기 바랍니다. ```py >>> from transformers import TFAutoModelForSeq2SeqLM >>> model = TFAutoModelForSeq2SeqLM.from_pretrained("my_awesome_opus_books_model") >>> outputs = model.generate(inputs, max_new_tokens=40, do_sample=True, top_k=30, top_p=0.95) ``` 생성된 토큰 ID들을 다시 텍스트로 디코딩하세요: ```py >>> tokenizer.decode(outputs[0], skip_special_tokens=True) 'Les lugumes partagent les ressources avec des bactéries fixatrices d'azote.' ``` </tf> </frameworkcontent>

transformers/docs/source/ko/tasks/translation.md/0

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# DeepSpeed集成 [DeepSpeed](https://github.com/microsoft/DeepSpeed)实现了[ZeRO论文](https://arxiv.org/abs/1910.02054)中描述的所有内容。目前，它提供对以下功能的全面支持： 1. 优化器状态分区（ZeRO stage 1） 2. 梯度分区（ZeRO stage 2） 3. 参数分区（ZeRO stage 3） 4. 自定义混合精度训练处理 5. 一系列基于CUDA扩展的快速优化器 6. ZeRO-Offload 到 CPU 和 NVMe ZeRO-Offload有其自己的专门论文：[ZeRO-Offload: Democratizing Billion-Scale Model Training](https://arxiv.org/abs/2101.06840)。而NVMe支持在论文[ZeRO-Infinity: Breaking the GPU Memory Wall for Extreme Scale Deep Learning](https://arxiv.org/abs/2104.07857)中进行了描述。 DeepSpeed ZeRO-2主要用于训练，因为它的特性对推理没有用处。 DeepSpeed ZeRO-3也可以用于推理，因为它允许将单个GPU无法加载的大模型加载到多个GPU上。 🤗 Transformers通过以下两种方式集成了[DeepSpeed](https://github.com/microsoft/DeepSpeed)： 1. 通过[`Trainer`]集成核心的DeepSpeed功能。这是一种“为您完成一切”式的集成 - 您只需提供自定义配置文件或使用我们的模板配置文件。本文档的大部分内容都集中在这个功能上。 2. 如果您不使用[`Trainer`]并希望在自己的Trainer中集成DeepSpeed，那么像`from_pretrained`和`from_config`这样的核心功能函数将包括ZeRO stage 3及以上的DeepSpeed的基础部分，如`zero.Init`。要利用此功能，请阅读有关[非Trainer DeepSpeed集成](#nontrainer-deepspeed-integration)的文档。集成的内容：训练： 1. DeepSpeed ZeRO训练支持完整的ZeRO stages 1、2和3，以及ZeRO-Infinity（CPU和NVMe offload）。推理： 1. DeepSpeed ZeRO推理支持ZeRO stage 3和ZeRO-Infinity。它使用与训练相同的ZeRO协议，但不使用优化器和学习率调度器，只有stage 3与推理相关。更多详细信息请参阅：[zero-inference](#zero-inference)。此外还有DeepSpeed推理 - 这是一种完全不同的技术，它使用张量并行而不是ZeRO（即将推出）。 <a id='deepspeed-trainer-integration'></a> ## Trainer DeepSpeed 集成 <a id='deepspeed-installation'></a> ### 安装通过pypi安装库： ```bash pip install deepspeed ``` 或通过 `transformers` 的 `extras`安装： ```bash pip install transformers[deepspeed] ``` 或在 [DeepSpeed 的 GitHub 页面](https://github.com/microsoft/deepspeed#installation) 和 [高级安装](https://www.deepspeed.ai/tutorials/advanced-install/) 中查找更多详细信息。如果构建过程中仍然遇到问题，请首先确保阅读 [CUDA 扩展安装注意事项](trainer#cuda-extension-installation-notes)。如果您没有预先构建扩展而是在运行时构建它们，而且您尝试了以上所有解决方案都无效，下一步可以尝试在安装之前预先构建扩展。进行 DeepSpeed 的本地构建： ```bash git clone https://github.com/microsoft/DeepSpeed/ cd DeepSpeed rm -rf build TORCH_CUDA_ARCH_LIST="8.6" DS_BUILD_CPU_ADAM=1 DS_BUILD_UTILS=1 pip install . \ --global-option="build_ext" --global-option="-j8" --no-cache -v \ --disable-pip-version-check 2>&1 | tee build.log ``` 如果您打算使用 NVMe offload，您还需要在上述说明中添加 `DS_BUILD_AIO=1`（并且还需要在系统范围内安装 *libaio-dev*）。编辑 `TORCH_CUDA_ARCH_LIST` 以插入您打算使用的 GPU 卡的架构代码。假设您的所有卡都是相同的，您可以通过以下方式获取架构： ```bash CUDA_VISIBLE_DEVICES=0 python -c "import torch; print(torch.cuda.get_device_capability())" ``` 因此，如果您得到 `8, 6`，则使用 `TORCH_CUDA_ARCH_LIST="8.6"`。如果您有多个不同的卡，您可以像这样列出所有卡 `TORCH_CUDA_ARCH_LIST="6.1;8.6"`。如果您需要在多台机器上使用相同的设置，请创建一个二进制 wheel： ```bash git clone https://github.com/microsoft/DeepSpeed/ cd DeepSpeed rm -rf build TORCH_CUDA_ARCH_LIST="8.6" DS_BUILD_CPU_ADAM=1 DS_BUILD_UTILS=1 \ python setup.py build_ext -j8 bdist_wheel ``` 它将生成类似于 `dist/deepspeed-0.3.13+8cd046f-cp38-cp38-linux_x86_64.whl` 的文件，现在您可以在本地或任何其他机器上安装它，如 `pip install deepspeed-0.3.13+8cd046f-cp38-cp38-linux_x86_64.whl`。再次提醒确保调整 `TORCH_CUDA_ARCH_LIST` 以匹配目标架构。您可以在[这里](https://developer.nvidia.com/cuda-gpus)找到完整的 NVIDIA GPU 列表及其对应的 **计算能力**（与此上下文中的架构相同）。您可以使用以下命令检查 PyTorch 构建时使用的架构： ```bash python -c "import torch; print(torch.cuda.get_arch_list())" ``` 以下是如何查找已安装 GPU 中的一张卡的架构。例如，对于 GPU 0： ```bash CUDA_VISIBLE_DEVICES=0 python -c "import torch; \ print(torch.cuda.get_device_properties(torch.device('cuda')))" ``` 如果输出结果如下： ```bash _CudaDeviceProperties(name='GeForce RTX 3090', major=8, minor=6, total_memory=24268MB, multi_processor_count=82) ``` 然后您就知道这张卡的架构是 `8.6`。您也可以完全省略 `TORCH_CUDA_ARCH_LIST`，然后构建程序将自动查询构建所在的 GPU 的架构。这可能与目标机器上的 GPU 不匹配，因此最好明确指定所需的架构。如果尝试了所有建议的方法仍然遇到构建问题，请继续在 [Deepspeed](https://github.com/microsoft/DeepSpeed/issues)的 GitHub Issue 上提交问题。 <a id='deepspeed-multi-gpu'></a> ### 多GPU启用为了启用DeepSpeed 集成，调整 [`Trainer`] 的命令行参数，添加一个新的参数 `--deepspeed ds_config.json`，其中 `ds_config.json` 是 DeepSpeed 配置文件，如文档 [这里](https://www.deepspeed.ai/docs/config-json/) 所述。文件命名由您决定。建议使用 DeepSpeed 的 `add_config_arguments` 程序将必要的命令行参数添加到您的代码中。有关更多信息，请参阅 [DeepSpeed 的参数解析](https://deepspeed.readthedocs.io/en/latest/initialize.html#argument-parsing) 文档。在这里，您可以使用您喜欢的启动器。您可以继续使用 PyTorch 启动器： ```bash torch.distributed.run --nproc_per_node=2 your_program.py <normal cl args> --deepspeed ds_config.json ``` 或使用由 `deepspeed` 提供的启动器： ```bash deepspeed --num_gpus=2 your_program.py <normal cl args> --deepspeed ds_config.json ``` 正如您所见，这两个启动器的参数不同，但对于大多数需求，任何一个都可以满足工作需求。有关如何配置各个节点和 GPU 的完整详细信息，请查看 [此处](https://www.deepspeed.ai/getting-started/#resource-configuration-multi-node)。当您使用 `deepspeed` 启动器并且希望使用所有可用的 GPU 时，您可以简单地省略 `--num_gpus` 标志。以下是在 DeepSpeed 中启用使用所有可用 GPU情况下，运行 `run_translation.py` 的示例： ```bash deepspeed examples/pytorch/translation/run_translation.py \ --deepspeed tests/deepspeed/ds_config_zero3.json \ --model_name_or_path google-t5/t5-small --per_device_train_batch_size 1 \ --output_dir output_dir --overwrite_output_dir --fp16 \ --do_train --max_train_samples 500 --num_train_epochs 1 \ --dataset_name wmt16 --dataset_config "ro-en" \ --source_lang en --target_lang ro ``` 请注意，在 DeepSpeed 文档中，您可能会看到 `--deepspeed --deepspeed_config ds_config.json` - 即两个与 DeepSpeed 相关的参数，但为简单起见，并且因为已经有很多参数要处理，我们将两者合并为一个单一参数。有关一些实际使用示例，请参阅 [此帖](https://github.com/huggingface/transformers/issues/8771#issuecomment-759248400)。 <a id='deepspeed-one-gpu'></a> ### 单GPU启用要使用一张 GPU 启用 DeepSpeed，调整 [`Trainer`] 的命令行参数如下： ```bash deepspeed --num_gpus=1 examples/pytorch/translation/run_translation.py \ --deepspeed tests/deepspeed/ds_config_zero2.json \ --model_name_or_path google-t5/t5-small --per_device_train_batch_size 1 \ --output_dir output_dir --overwrite_output_dir --fp16 \ --do_train --max_train_samples 500 --num_train_epochs 1 \ --dataset_name wmt16 --dataset_config "ro-en" \ --source_lang en --target_lang ro ``` 这与多 GPU 的情况几乎相同，但在这里我们通过 `--num_gpus=1` 明确告诉 DeepSpeed 仅使用一张 GPU。默认情况下，DeepSpeed 启用给定节点上可以看到的所有 GPU。如果您一开始只有一张 GPU，那么您不需要这个参数。以下 [文档](https://www.deepspeed.ai/getting-started/#resource-configuration-multi-node) 讨论了启动器的选项。为什么要在仅使用一张 GPU 的情况下使用 DeepSpeed 呢？ 1. 它具有 ZeRO-offload 功能，可以将一些计算和内存委托给主机的 CPU 和内存，从而为模型的需求保留更多 GPU 资源 - 例如更大的批处理大小，或启用正常情况下无法容纳的非常大模型。 2. 它提供了智能的 GPU 内存管理系统，最小化内存碎片，这再次允许您容纳更大的模型和数据批次。虽然接下来我们将详细讨论配置，但在单个 GPU 上通过 DeepSpeed 实现巨大性能提升的关键是在配置文件中至少有以下配置： ```json { "zero_optimization": { "stage": 2, "offload_optimizer": { "device": "cpu", "pin_memory": true }, "allgather_partitions": true, "allgather_bucket_size": 2e8, "reduce_scatter": true, "reduce_bucket_size": 2e8, "overlap_comm": true, "contiguous_gradients": true } } ``` 这会启用`optimizer offload `和一些其他重要功能。您可以尝试不同的buffer大小，有关详细信息，请参见下面的讨论。关于这种启用类型的实际使用示例，请参阅 [此帖](https://github.com/huggingface/transformers/issues/8771#issuecomment-759176685)。您还可以尝试使用本文后面进一步解释的支持`CPU 和 NVMe offload`功能的ZeRO-3 。  注意： - 如果您需要在特定的 GPU 上运行，而不是 GPU 0，则无法使用 `CUDA_VISIBLE_DEVICES` 来限制可用 GPU 的可见范围。相反，您必须使用以下语法： ```bash deepspeed --include localhost:1 examples/pytorch/translation/run_translation.py ... ``` 在这个例子中，我们告诉 DeepSpeed 使用 GPU 1（第二个 GPU）。 <a id='deepspeed-multi-node'></a> ### 多节点启用这一部分的信息不仅适用于 DeepSpeed 集成，也适用于任何多节点程序。但 DeepSpeed 提供了一个比其他启动器更易于使用的 `deepspeed` 启动器，除非您在 SLURM 环境中。在本节，让我们假设您有两个节点，每个节点有 8 张 GPU。您可以通过 `ssh hostname1` 访问第一个节点，通过 `ssh hostname2` 访问第二个节点，两者必须能够在本地通过 ssh 无密码方式相互访问。当然，您需要将这些主机（节点）名称重命名为您实际使用的主机名称。 #### torch.distributed.run启动器例如，要使用 `torch.distributed.run`，您可以执行以下操作： ```bash python -m torch.distributed.run --nproc_per_node=8 --nnode=2 --node_rank=0 --master_addr=hostname1 \ --master_port=9901 your_program.py <normal cl args> --deepspeed ds_config.json ``` 您必须 ssh 到每个节点，并在每个节点上运行相同的命令！不用担心，启动器会等待两个节点同步完成。有关更多信息，请参阅 [torchrun](https://pytorch.org/docs/stable/elastic/run.html)。顺便说一下，这也是替代了几个 PyTorch 版本前的 `torch.distributed.launch` 的启动器。 #### deepspeed启动器要改用 `deepspeed` 启动器，首先需要创建一个 `hostfile` 文件： ``` hostname1 slots=8 hostname2 slots=8 ``` 然后，您可以这样启动： ```bash deepspeed --num_gpus 8 --num_nodes 2 --hostfile hostfile --master_addr hostname1 --master_port=9901 \ your_program.py <normal cl args> --deepspeed ds_config.json ``` 与 `torch.distributed.run` 启动器不同，`deepspeed` 将自动在两个节点上启动此命令！更多信息，请参阅[资源配置（多节点）](https://www.deepspeed.ai/getting-started/#resource-configuration-multi-node)。 #### 在 SLURM 环境中启动在 SLURM 环境中，可以采用以下方法。以下是一个 SLURM 脚本 `launch.slurm`，您需要根据您的具体 SLURM 环境进行调整。 ```bash #SBATCH --job-name=test-nodes # name #SBATCH --nodes=2 # nodes #SBATCH --ntasks-per-node=1 # crucial - only 1 task per dist per node! #SBATCH --cpus-per-task=10 # number of cores per tasks #SBATCH --gres=gpu:8 # number of gpus #SBATCH --time 20:00:00 # maximum execution time (HH:MM:SS) #SBATCH --output=%x-%j.out # output file name export GPUS_PER_NODE=8 export MASTER_ADDR=$(scontrol show hostnames $SLURM_JOB_NODELIST | head -n 1) export MASTER_PORT=9901 srun --jobid $SLURM_JOBID bash -c 'python -m torch.distributed.run \ --nproc_per_node $GPUS_PER_NODE --nnodes $SLURM_NNODES --node_rank $SLURM_PROCID \ --master_addr $MASTER_ADDR --master_port $MASTER_PORT \ your_program.py <normal cl args> --deepspeed ds_config.json' ``` 剩下的就是运行它： ```bash sbatch launch.slurm ``` `srun` 将负责在所有节点上同时启动程序。 #### 使用非共享文件系统默认情况下，DeepSpeed 假定多节点环境使用共享存储。如果不是这种情况，每个节点只能看到本地文件系统，你需要调整配置文件，包含一个 [`checkpoint` 部分](https://www.deepspeed.ai/docs/config-json/#checkpoint-options)并设置如下选项： ```json { "checkpoint": { "use_node_local_storage": true } } ``` 或者，你还可以使用 [`Trainer`] 的 `--save_on_each_node` 参数，上述配置将自动添加。 <a id='deepspeed-notebook'></a> ### 在Notebooks启用在将`notebook cells`作为脚本运行的情况下，问题在于没有正常的 `deepspeed` 启动器可依赖，因此在某些设置下，我们必须仿真运行它。如果您只使用一个 GPU，以下是如何调整notebook中的训练代码以使用 DeepSpeed。 ```python # DeepSpeed requires a distributed environment even when only one process is used. # This emulates a launcher in the notebook import os os.environ["MASTER_ADDR"] = "localhost" os.environ["MASTER_PORT"] = "9994" # modify if RuntimeError: Address already in use os.environ["RANK"] = "0" os.environ["LOCAL_RANK"] = "0" os.environ["WORLD_SIZE"] = "1" # Now proceed as normal, plus pass the deepspeed config file training_args = TrainingArguments(..., deepspeed="ds_config_zero3.json") trainer = Trainer(...) trainer.train() ``` 注意：`...` 代表您传递给函数的正常参数。如果要使用多于一个 GPU，您必须在 DeepSpeed 中使用多进程环境。也就是说，您必须使用专门的启动器来实现这一目的，而不能通过仿真本节开头呈现的分布式环境来完成。如果想要在notebook中动态创建配置文件并保存在当前目录，您可以在一个专用的cell中使用： ```python no-style %%bash cat <<'EOT' > ds_config_zero3.json { "fp16": { "enabled": "auto", "loss_scale": 0, "loss_scale_window": 1000, "initial_scale_power": 16, "hysteresis": 2, "min_loss_scale": 1 }, "optimizer": { "type": "AdamW", "params": { "lr": "auto", "betas": "auto", "eps": "auto", "weight_decay": "auto" } }, "scheduler": { "type": "WarmupLR", "params": { "warmup_min_lr": "auto", "warmup_max_lr": "auto", "warmup_num_steps": "auto" } }, "zero_optimization": { "stage": 3, "offload_optimizer": { "device": "cpu", "pin_memory": true }, "offload_param": { "device": "cpu", "pin_memory": true }, "overlap_comm": true, "contiguous_gradients": true, "sub_group_size": 1e9, "reduce_bucket_size": "auto", "stage3_prefetch_bucket_size": "auto", "stage3_param_persistence_threshold": "auto", "stage3_max_live_parameters": 1e9, "stage3_max_reuse_distance": 1e9, "stage3_gather_16bit_weights_on_model_save": true }, "gradient_accumulation_steps": "auto", "gradient_clipping": "auto", "steps_per_print": 2000, "train_batch_size": "auto", "train_micro_batch_size_per_gpu": "auto", "wall_clock_breakdown": false } EOT ``` 如果训练脚本在一个普通文件中而不是在notebook cells中，您可以通过笔记本中的 shell 正常启动 `deepspeed`。例如，要使用 `run_translation.py`，您可以这样启动： ```python no-style !git clone https://github.com/huggingface/transformers !cd transformers; deepspeed examples/pytorch/translation/run_translation.py ... ``` 或者使用 `%%bash` 魔术命令，您可以编写多行代码，用于运行 shell 程序： ```python no-style %%bash git clone https://github.com/huggingface/transformers cd transformers deepspeed examples/pytorch/translation/run_translation.py ... ``` 在这种情况下，您不需要本节开头呈现的任何代码。注意：虽然 `%%bash` 魔术命令很方便，但目前它会缓冲输出，因此在进程完成之前您看不到日志。 <a id='deepspeed-config'></a> ### 配置有关可以在 DeepSpeed 配置文件中使用的完整配置选项的详细指南，请参阅[以下文档](https://www.deepspeed.ai/docs/config-json/)。您可以在 [DeepSpeedExamples 仓库](https://github.com/microsoft/DeepSpeedExamples)中找到解决各种实际需求的数十个 DeepSpeed 配置示例。 ```bash git clone https://github.com/microsoft/DeepSpeedExamples cd DeepSpeedExamples find . -name '*json' ``` 延续上面的代码，假设您要配置 Lamb 优化器。那么您可以通过以下方式在示例的 `.json` 文件中进行搜索： ```bash grep -i Lamb $(find . -name '*json') ``` 还可以在[主仓](https://github.com/microsoft/DeepSpeed)中找到更多示例。在使用 DeepSpeed 时，您总是需要提供一个 DeepSpeed 配置文件，但是一些配置参数必须通过命令行进行配置。您将在本指南的剩余章节找到这些细微差别。为了了解 DeepSpeed 配置文件，这里有一个激活 ZeRO stage 2 功能的示例，包括优化器状态的 CPU offload，使用 `AdamW` 优化器和 `WarmupLR` 调度器，并且如果传递了 `--fp16` 参数将启用混合精度训练： ```json { "fp16": { "enabled": "auto", "loss_scale": 0, "loss_scale_window": 1000, "initial_scale_power": 16, "hysteresis": 2, "min_loss_scale": 1 }, "optimizer": { "type": "AdamW", "params": { "lr": "auto", "betas": "auto", "eps": "auto", "weight_decay": "auto" } }, "scheduler": { "type": "WarmupLR", "params": { "warmup_min_lr": "auto", "warmup_max_lr": "auto", "warmup_num_steps": "auto" } }, "zero_optimization": { "stage": 2, "offload_optimizer": { "device": "cpu", "pin_memory": true }, "allgather_partitions": true, "allgather_bucket_size": 2e8, "overlap_comm": true, "reduce_scatter": true, "reduce_bucket_size": 2e8, "contiguous_gradients": true }, "gradient_accumulation_steps": "auto", "gradient_clipping": "auto", "train_batch_size": "auto", "train_micro_batch_size_per_gpu": "auto", } ``` 当您执行程序时，DeepSpeed 将把它从 [`Trainer`] 收到的配置日志输出到console，因此您可以看到传递给它的最终配置。 <a id='deepspeed-config-passing'></a> ### 传递配置正如本文档讨论的那样，通常将 DeepSpeed 配置作为指向 JSON 文件的路径传递，但如果您没有使用命令行界面配置训练，而是通过 [`TrainingArguments`] 实例化 [`Trainer`]，那么对于 `deepspeed` 参数，你可以传递一个嵌套的 `dict`。这使您能够即时创建配置，而无需在将其传递给 [`TrainingArguments`] 之前将其写入文件系统。总结起来，您可以这样做： ```python TrainingArguments(..., deepspeed="/path/to/ds_config.json") ``` 或者: ```python ds_config_dict = dict(scheduler=scheduler_params, optimizer=optimizer_params) TrainingArguments(..., deepspeed=ds_config_dict) ``` <a id='deepspeed-config-shared'></a> ### 共享配置 <Tip warning={true}> 这一部分是必读的。 </Tip> 一些配置值对于 [`Trainer`] 和 DeepSpeed 正常运行都是必需的，因此，为了防止定义冲突及导致的难以检测的错误，我们选择通过 [`Trainer`] 命令行参数配置这些值。此外，一些配置值是基于模型的配置自动派生的，因此，与其记住手动调整多个值，最好让 [`Trainer`] 为您做大部分配置。因此，在本指南的其余部分，您将找到一个特殊的配置值：`auto`，当设置时将自动将参数替换为正确或最有效的值。请随意选择忽略此建议或显式设置该值，在这种情况下，请务必确保 [`Trainer`] 参数和 DeepSpeed 配置保持一致。例如，您是否使用相同的学习率、批量大小或梯度累积设置？如果这些不匹配，训练可能以非常难以检测的方式失败。请重视该警告。还有一些参数是仅适用于 DeepSpeed 的，并且这些参数必须手动设置以适应您的需求。在您自己的程序中，如果您想要作为主动修改 DeepSpeed 配置并以此配置 [`TrainingArguments`]，您还可以使用以下方法。步骤如下： 1. 创建或加载要用作主配置的 DeepSpeed 配置 2. 根据这些参数值创建 [`TrainingArguments`] 对象请注意，一些值，比如 `scheduler.params.total_num_steps`，是在 [`Trainer`] 的 `train` 过程中计算的，但当然您也可以自己计算这些值。 <a id='deepspeed-zero'></a> ### ZeRO [Zero Redundancy Optimizer (ZeRO)](https://www.deepspeed.ai/tutorials/zero/) 是 DeepSpeed 的工作核心。它支持3个不同级别（stages）的优化。Stage 1 对于扩展性来说不是很有趣，因此本文档重点关注Stage 2和Stage 3。Stage 3通过最新的 ZeRO-Infinity 进一步改进。你可以在 DeepSpeed 文档中找到更详细的信息。配置文件的 `zero_optimization` 部分是最重要的部分（[文档](https://www.deepspeed.ai/docs/config-json/#zero-optimizations-for-fp16-training)），因为在这里您定义了要启用哪些 ZeRO stages 以及如何配置它们。您可以在 DeepSpeed 文档中找到每个参数的解释。这一部分必须通过 DeepSpeed 配置文件单独配置 - [`Trainer`] 不提供相应的命令行参数。注意：目前 DeepSpeed 不验证参数名称，因此如果您拼错了任何参数，它将使用拼写错误的参数的默认设置。您可以观察 DeepSpeed 引擎启动日志消息，看看它将使用哪些值。 <a id='deepspeed-zero2-config'></a> #### ZeRO-2 配置以下是 ZeRO stage 2 的配置示例： ```json { "zero_optimization": { "stage": 2, "offload_optimizer": { "device": "cpu", "pin_memory": true }, "allgather_partitions": true, "allgather_bucket_size": 5e8, "overlap_comm": true, "reduce_scatter": true, "reduce_bucket_size": 5e8, "contiguous_gradients": true } } ``` **性能调优：** - 启用 `offload_optimizer` 应该减少 GPU 内存使用（需要 `"stage": 2`）。 - `"overlap_comm": true` 通过增加 GPU 内存使用来降低all-reduce 的延迟。 `overlap_comm` 使用了 `allgather_bucket_size` 和 `reduce_bucket_size` 值的4.5倍。因此，如果它们设置为 `5e8`，这将需要一个9GB的内存占用（`5e8 x 2Bytes x 2 x 4.5`）。因此，如果您的 GPU 内存为8GB或更小，为了避免出现OOM错误，您需要将这些参数减小到约 `2e8`，这将需要3.6GB。如果您的 GPU 容量更大，当您开始遇到OOM时，你可能也需要这样做。 - 当减小这些buffers时，您以更慢的通信速度来换取更多的 GPU 内存。buffers大小越小，通信速度越慢，GPU 可用于其他任务的内存就越多。因此，如果更大的批处理大小很重要，那么稍微减慢训练时间可能是一个很好的权衡。此外，`deepspeed==0.4.4` 添加了一个新选项 `round_robin_gradients`，您可以通过以下方式启用： ```json { "zero_optimization": { "round_robin_gradients": true } } ``` 这是一个用于 CPU offloading 的stage 2优化，通过细粒度梯度分区在 ranks 之间并行复制到 CPU 内存，从而实现了性能的提升。性能优势随着梯度累积步骤（在优化器步骤之间进行更多复制）或 GPU 数量（增加并行性）增加而增加。 <a id='deepspeed-zero3-config'></a> #### ZeRO-3 配置以下是 ZeRO stage 3的配置示例： ```json { "zero_optimization": { "stage": 3, "offload_optimizer": { "device": "cpu", "pin_memory": true }, "offload_param": { "device": "cpu", "pin_memory": true }, "overlap_comm": true, "contiguous_gradients": true, "sub_group_size": 1e9, "reduce_bucket_size": "auto", "stage3_prefetch_bucket_size": "auto", "stage3_param_persistence_threshold": "auto", "stage3_max_live_parameters": 1e9, "stage3_max_reuse_distance": 1e9, "stage3_gather_16bit_weights_on_model_save": true } } ``` 如果您因为你的模型或激活值超过 GPU 内存而遇到OOM问题，并且您有未使用的 CPU 内存，可以通股票使用 `"device": "cpu"` 将优化器状态和参数卸载到 CPU 内存中，来解决这个限制。如果您不想卸载到 CPU 内存，可以在 `device` 条目中使用 `none` 代替 `cpu`。将优化器状态卸载到 NVMe 上会在后面进一步讨论。通过将 `pin_memory` 设置为 `true` 启用固定内存。此功能会以减少可用于其他进程的内存为代价来提高吞吐量。固定内存被分配给特定请求它的进程，通常比普通 CPU 内存访问速度更快。 **性能调优：** - `stage3_max_live_parameters`: `1e9` - `stage3_max_reuse_distance`: `1e9` 如果遇到OOM问题，请减小 `stage3_max_live_parameters` 和 `stage3_max_reuse_distance`。它们对性能的影响应该很小，除非您正在进行激活值checkpointing。`1e9` 大约会消耗 ~2GB。内存由 `stage3_max_live_parameters` 和 `stage3_max_reuse_distance` 共享，所以它不是叠加的，而是总共2GB。 `stage3_max_live_parameters` 是在任何给定时间要在 GPU 上保留多少个完整参数的上限。"reuse distance" 是我们用来确定参数在将来何时会再次使用的度量标准，我们使用 `stage3_max_reuse_distance` 来决定是丢弃参数还是保留参数。如果一个参数在不久的将来（小于 `stage3_max_reuse_distance`）将被再次使用，那么我们将其保留以减少通信开销。这在启用激活值checkpoing时非常有用，其中我们以单层粒度进行前向重计算和反向传播，并希望在反向传播期间保留前向重计算中的参数。以下配置值取决于模型的隐藏大小： - `reduce_bucket_size`: `hidden_size*hidden_size` - `stage3_prefetch_bucket_size`: `0.9 * hidden_size * hidden_size` - `stage3_param_persistence_threshold`: `10 * hidden_size` 因此，将这些值设置为 `auto`，[`Trainer`] 将自动分配推荐的参数值。当然，如果您愿意，也可以显式设置这些值。 `stage3_gather_16bit_weights_on_model_save` 在模型保存时启用模型的 fp16 权重整合。对于大模型和多个 GPU，无论是在内存还是速度方面，这都是一项昂贵的操作。目前如果计划恢复训练，这是必需的。请注意未来的更新可能会删除此限制并让使用更加灵活。如果您从 ZeRO-2 配置迁移，请注意 `allgather_partitions`、`allgather_bucket_size` 和 `reduce_scatter` 配置参数在 ZeRO-3 中不被使用。如果保留这些配置文件，它们将被忽略。 - `sub_group_size`: `1e9` `sub_group_size` 控制在优化器步骤期间更新参数的粒度。参数被分组到大小为 `sub_group_size` 的桶中，每个桶逐个更新。在 ZeRO-Infinity 中与 NVMe offload一起使用时，`sub_group_size` 控制了在优化器步骤期间在 NVMe 和 CPU 内存之间移动模型状态的粒度。这可以防止非常大的模型耗尽 CPU 内存。当不使用 NVMe offload时，可以将 `sub_group_size` 保留为其默认值 *1e9*。在以下情况下，您可能需要更改其默认值： 1. 在优化器步骤中遇到OOM：减小 `sub_group_size` 以减少临时buffers的内存利用 2. 优化器步骤花费很长时间：增加 `sub_group_size` 以提高由于增加的数据buffers而导致的带宽利用率。 #### ZeRO-0 配置请注意，我们将 Stage 0 和 1 放在最后，因为它们很少使用。 Stage 0 禁用了所有类型的分片，只是将 DeepSpeed 作为 DDP 使用。您可以通过以下方式启用： ```json { "zero_optimization": { "stage": 0 } } ``` 这将实质上禁用 ZeRO，而无需更改其他任何内容。 #### ZeRO-1 配置 Stage 1 等同于 Stage 2 减去梯度分片。您可以尝试使用以下配置，仅对优化器状态进行分片，以稍微加速： ```json { "zero_optimization": { "stage": 1 } } ``` <a id='deepspeed-nvme'></a> ### NVMe 支持 ZeRO-Infinity 通过使用 NVMe 内存扩展 GPU 和 CPU 内存，从而允许训练非常大的模型。由于智能分区和平铺算法，在offload期间每个 GPU 需要发送和接收非常小量的数据，因此 NVMe 被证明适用于训练过程中提供更大的总内存池。ZeRO-Infinity 需要启用 ZeRO-3。以下配置示例启用 NVMe 来offload优化器状态和参数： ```json { "zero_optimization": { "stage": 3, "offload_optimizer": { "device": "nvme", "nvme_path": "/local_nvme", "pin_memory": true, "buffer_count": 4, "fast_init": false }, "offload_param": { "device": "nvme", "nvme_path": "/local_nvme", "pin_memory": true, "buffer_count": 5, "buffer_size": 1e8, "max_in_cpu": 1e9 }, "aio": { "block_size": 262144, "queue_depth": 32, "thread_count": 1, "single_submit": false, "overlap_events": true }, "overlap_comm": true, "contiguous_gradients": true, "sub_group_size": 1e9, "reduce_bucket_size": "auto", "stage3_prefetch_bucket_size": "auto", "stage3_param_persistence_threshold": "auto", "stage3_max_live_parameters": 1e9, "stage3_max_reuse_distance": 1e9, "stage3_gather_16bit_weights_on_model_save": true }, } ``` 您可以选择将优化器状态和参数都卸载到 NVMe，也可以只选择其中一个，或者都不选择。例如，如果您有大量的 CPU 内存可用，只卸载到 CPU 内存训练速度会更快（提示："device": "cpu"）。这是有关卸载 [优化器状态](https://www.deepspeed.ai/docs/config-json/#optimizer-offloading) 和 [参数](https://www.deepspeed.ai/docs/config-json/#parameter-offloading) 的完整文档。确保您的 `nvme_path` 实际上是一个 NVMe，因为它与普通硬盘或 SSD 一起工作，但速度会慢得多。快速可扩展的训练是根据现代 NVMe 传输速度设计的（截至本文撰写时，可以达到 ~3.5GB/s 读取，~3GB/s 写入的峰值速度）。为了找出最佳的 `aio` 配置块，您必须在目标设置上运行一个基准测试，具体操作请参见[说明](https://github.com/microsoft/DeepSpeed/issues/998)。 <a id='deepspeed-zero2-zero3-performance'></a> #### ZeRO-2 和 ZeRO-3 性能对比如果其他一切都配置相同，ZeRO-3 可能比 ZeRO-2 慢，因为前者除了 ZeRO-2 的操作外，还必须收集模型权重。如果 ZeRO-2 满足您的需求，而且您不需要扩展到几个 GPU 以上，那么您可以选择继续使用它。重要的是要理解，ZeRO-3 以速度为代价实现了更高的可扩展性。可以调整 ZeRO-3 配置使其性能接近 ZeRO-2： - 将 `stage3_param_persistence_threshold` 设置为一个非常大的数字 - 大于最大的参数，例如 `6 * hidden_size * hidden_size`。这将保留参数在 GPU 上。 - 关闭 `offload_params`，因为 ZeRO-2 没有这个选项。即使不更改 `stage3_param_persistence_threshold`，仅将 `offload_params` 关闭，性能可能会显著提高。当然，这些更改将影响您可以训练的模型的大小。因此，这些更改可根据需求帮助您在可扩展性和速度之间进行权衡。 <a id='deepspeed-zero2-example'></a> #### ZeRO-2 示例这是一个完整的 ZeRO-2 自动配置文件 `ds_config_zero2.json`： ```json { "fp16": { "enabled": "auto", "loss_scale": 0, "loss_scale_window": 1000, "initial_scale_power": 16, "hysteresis": 2, "min_loss_scale": 1 }, "optimizer": { "type": "AdamW", "params": { "lr": "auto", "betas": "auto", "eps": "auto", "weight_decay": "auto" } }, "scheduler": { "type": "WarmupLR", "params": { "warmup_min_lr": "auto", "warmup_max_lr": "auto", "warmup_num_steps": "auto" } }, "zero_optimization": { "stage": 2, "offload_optimizer": { "device": "cpu", "pin_memory": true }, "allgather_partitions": true, "allgather_bucket_size": 2e8, "overlap_comm": true, "reduce_scatter": true, "reduce_bucket_size": 2e8, "contiguous_gradients": true }, "gradient_accumulation_steps": "auto", "gradient_clipping": "auto", "steps_per_print": 2000, "train_batch_size": "auto", "train_micro_batch_size_per_gpu": "auto", "wall_clock_breakdown": false } ``` 这是一个完整的手动设置的启用所有功能的 ZeRO-2 配置文件。主要是为了让您看到典型的参数值是什么样的，但我们强烈建议使用其中包含多个 `auto` 设置的配置文件。 ```json { "fp16": { "enabled": true, "loss_scale": 0, "loss_scale_window": 1000, "initial_scale_power": 16, "hysteresis": 2, "min_loss_scale": 1 }, "optimizer": { "type": "AdamW", "params": { "lr": 3e-5, "betas": [0.8, 0.999], "eps": 1e-8, "weight_decay": 3e-7 } }, "scheduler": { "type": "WarmupLR", "params": { "warmup_min_lr": 0, "warmup_max_lr": 3e-5, "warmup_num_steps": 500 } }, "zero_optimization": { "stage": 2, "offload_optimizer": { "device": "cpu", "pin_memory": true }, "allgather_partitions": true, "allgather_bucket_size": 2e8, "overlap_comm": true, "reduce_scatter": true, "reduce_bucket_size": 2e8, "contiguous_gradients": true }, "steps_per_print": 2000, "wall_clock_breakdown": false } ``` <a id='deepspeed-zero3-example'></a> #### ZeRO-3 示例这是一个完整的 ZeRO-3 自动配置文件 `ds_config_zero3.json`： ```json { "fp16": { "enabled": "auto", "loss_scale": 0, "loss_scale_window": 1000, "initial_scale_power": 16, "hysteresis": 2, "min_loss_scale": 1 }, "optimizer": { "type": "AdamW", "params": { "lr": "auto", "betas": "auto", "eps": "auto", "weight_decay": "auto" } }, "scheduler": { "type": "WarmupLR", "params": { "warmup_min_lr": "auto", "warmup_max_lr": "auto", "warmup_num_steps": "auto" } }, "zero_optimization": { "stage": 3, "offload_optimizer": { "device": "cpu", "pin_memory": true }, "offload_param": { "device": "cpu", "pin_memory": true }, "overlap_comm": true, "contiguous_gradients": true, "sub_group_size": 1e9, "reduce_bucket_size": "auto", "stage3_prefetch_bucket_size": "auto", "stage3_param_persistence_threshold": "auto", "stage3_max_live_parameters": 1e9, "stage3_max_reuse_distance": 1e9, "stage3_gather_16bit_weights_on_model_save": true }, "gradient_accumulation_steps": "auto", "gradient_clipping": "auto", "steps_per_print": 2000, "train_batch_size": "auto", "train_micro_batch_size_per_gpu": "auto", "wall_clock_breakdown": false } ``` 这是一个完整的手动设置的启用所有功能的ZeRO-3 配置文件。主要是为了让您看到典型的参数值是什么样的，但我们强烈建议使用其中包含多个 `auto` 设置的配置文件。 ```json { "fp16": { "enabled": true, "loss_scale": 0, "loss_scale_window": 1000, "initial_scale_power": 16, "hysteresis": 2, "min_loss_scale": 1 }, "optimizer": { "type": "AdamW", "params": { "lr": 3e-5, "betas": [0.8, 0.999], "eps": 1e-8, "weight_decay": 3e-7 } }, "scheduler": { "type": "WarmupLR", "params": { "warmup_min_lr": 0, "warmup_max_lr": 3e-5, "warmup_num_steps": 500 } }, "zero_optimization": { "stage": 3, "offload_optimizer": { "device": "cpu", "pin_memory": true }, "offload_param": { "device": "cpu", "pin_memory": true }, "overlap_comm": true, "contiguous_gradients": true, "sub_group_size": 1e9, "reduce_bucket_size": 1e6, "stage3_prefetch_bucket_size": 0.94e6, "stage3_param_persistence_threshold": 1e4, "stage3_max_live_parameters": 1e9, "stage3_max_reuse_distance": 1e9, "stage3_gather_16bit_weights_on_model_save": true }, "steps_per_print": 2000, "wall_clock_breakdown": false } ``` #### 如何选择最佳性能的ZeRO Stage和 offloads 了解了这些不同stages后，现在您需要决定使用哪个stage。本节将尝试回答这个问题。通常，以下规则适用： - 速度方面（左边比右边快） stage 0（DDP） > stage 1 > stage 2 > stage 2 + offload > stage 3 > stage3 + offload - GPU内存使用方面（右边比左边更节省GPU内存） stage 0（DDP） < stage 1 < stage 2 < stage 2 + offload < stage 3 < stage 3 + offload 所以，当您希望在尽量使用较少数量的GPU的同时获得最快的执行速度时，可以按照以下步骤进行。我们从最快的方法开始，如果遇到GPU内存溢出，然后切换到下一个速度较慢但使用的GPU内存更少的方法。以此类推。首先，将批量大小设置为1（您始终可以使用梯度累积来获得任何所需的有效批量大小）。 1. 启用 `--gradient_checkpointing 1`（HF Trainer）或直接 `model.gradient_checkpointing_enable()` - 如果发生OOM（Out of Memory），则执行以下步骤。 2. 首先尝试 ZeRO stage 2。如果发生OOM，则执行以下步骤。 3. 尝试 ZeRO stage 2 + `offload_optimizer` - 如果发生OOM，则执行以下步骤。 4. 切换到 ZeRO stage 3 - 如果发生OOM，则执行以下步骤。 5. 启用 `offload_param` 到 `cpu` - 如果发生OOM，则执行以下步骤。 6. 启用 `offload_optimizer` 到 `cpu` - 如果发生OOM，则执行以下步骤。 7. 如果仍然无法适应批量大小为1，请首先检查各种默认值并尽可能降低它们。例如，如果使用 `generate` 并且不使用宽搜索束，将其缩小，因为它会占用大量内存。 8. 绝对要使用混合半精度而非fp32 - 在Ampere及更高的GPU上使用bf16，在旧的GPU体系结构上使用fp16。 9. 如果仍然发生OOM，可以添加更多硬件或启用ZeRO-Infinity - 即切换 `offload_param` 和 `offload_optimizer` 到 `nvme`。您需要确保它是非常快的NVMe。作为趣闻，我曾经能够在一个小型GPU上使用BLOOM-176B进行推理，使用了ZeRO-Infinity，尽管速度非常慢。但它奏效了！当然，您也可以按相反的顺序进行这些步骤，从最节省GPU内存的配置开始，然后逐步反向进行，或者尝试进行二分法。一旦您的批量大小为1不会导致OOM，就测量您的有效吞吐量。接下来尝试将批量大小增加到尽可能大，因为批量大小越大，GPU的效率越高，特别是在它们乘法运算的矩阵很大时。现在性能优化游戏开始了。您可以关闭一些offload特性，或者降低ZeRO stage，并增加/减少批量大小，再次测量有效吞吐量。反复尝试，直到满意为止。不要花费太多时间，但如果您即将开始一个为期3个月的训练 - 请花几天时间找到吞吐量方面最有效的设置。这样您的训练成本将最低，而且您会更快地完成训练。在当前快节奏的机器学习世界中，如果您花费一个额外的月份来训练某样东西，你很可能会错过一个黄金机会。当然，这只是我分享的一种观察，我并不是在催促你。在开始训练BLOOM-176B之前，我花了2天时间进行这个过程，成功将吞吐量从90 TFLOPs提高到150 TFLOPs！这一努力为我们节省了一个多月的训练时间。这些注释主要是为训练模式编写的，但它们在推理中也应该大部分适用。例如，在推理中，Gradient Checkpointing 是无用的，因为它只在训练过程中有用。此外，我们发现，如果你正在进行多GPU推理并且不使用 [DeepSpeed-Inference](https://www.deepspeed.ai/tutorials/inference-tutorial/)，[Accelerate](https://huggingface.co/blog/bloom-inference-pytorch-scripts) 应该提供更优越的性能。其他与性能相关的快速注释： - 如果您从头开始训练某个模型，请尽量确保张量的形状可以被16整除（例如隐藏层大小）。对于批量大小，至少尝试可被2整除。如果您想从GPU中挤取更高性能，还有一些硬件特定的[wave和tile量化](https://developer.nvidia.com/blog/optimizing-gpu-performance-tensor-cores/)的可整除性。 ### Activation Checkpointing 或 Gradient Checkpointing Activation Checkpointing和Gradient Checkpointing是指相同方法的两个不同术语。这确实让人感到困惑，但事实就是这样。 Gradient Checkpointing允许通过牺牲速度来换取GPU内存，这要么使您能够克服GPU内存溢出，要么增加批量大小来获得更好的性能。 HF Transformers 模型对DeepSpeed的Activation Checkpointing一无所知，因此如果尝试在DeepSpeed配置文件中启用该功能，什么都不会发生。因此，您有两种方法可以利用这个非常有益的功能： 1. 如果您想使用 HF Transformers 模型，你可以使用 `model.gradient_checkpointing_enable()` 或在 HF Trainer 中使用 `--gradient_checkpointing`，它会自动为您启用这个功能。在这里使用了 `torch.utils.checkpoint`。 2. 如果您编写自己的模型并希望使用DeepSpeed的Activation Checkpointing，可以使用[规定的API](https://deepspeed.readthedocs.io/en/latest/activation-checkpointing.html)。您还可以使用 HF Transformers 的模型代码，将 `torch.utils.checkpoint` 替换为 DeepSpeed 的API。后者更灵活，因为它允许您将前向激活值卸载到CPU内存，而不是重新计算它们。 ### Optimizer 和 Scheduler 只要你不启用 `offload_optimizer`，您可以混合使用DeepSpeed和HuggingFace的调度器和优化器，但有一个例外，即不要使用HuggingFace调度器和DeepSpeed优化器的组合： | Combos | HF Scheduler | DS Scheduler | |:-------------|:-------------|:-------------| | HF Optimizer | Yes | Yes | | DS Optimizer | No | Yes | 在启用 `offload_optimizer` 的情况下，可以使用非DeepSpeed优化器，只要该优化器具有CPU和GPU的实现（除了LAMB）。 <a id='deepspeed-optimizer'></a> #### Optimizer DeepSpeed的主要优化器包括Adam、AdamW、OneBitAdam和Lamb。这些优化器已经与ZeRO进行了彻底的测试，因此建议使用它们。然而，也可以导入`torch`中的其他优化器。完整的文档在[这里](https://www.deepspeed.ai/docs/config-json/#optimizer-parameters)。如果在配置文件中不配置`optimizer`条目，[`Trainer`] 将自动将其设置为 `AdamW`，并使用提供的值或以下命令行参数的默认值：`--learning_rate`、`--adam_beta1`、`--adam_beta2`、`--adam_epsilon` 和 `--weight_decay`。以下是`AdamW` 的自动配置示例： ```json { "optimizer": { "type": "AdamW", "params": { "lr": "auto", "betas": "auto", "eps": "auto", "weight_decay": "auto" } } } ``` 请注意，命令行参数将设置配置文件中的值。这是为了有一个明确的值来源，并避免在不同地方设置学习率等值时难以找到的错误。命令行参数配置高于其他。被覆盖的值包括： - `lr` 的值为 `--learning_rate` - `betas` 的值为 `--adam_beta1 --adam_beta2` - `eps` 的值为 `--adam_epsilon` - `weight_decay` 的值为 `--weight_decay` 因此，请记住在命令行上调整共享的超参数。您也可以显式地设置这些值： ```json { "optimizer": { "type": "AdamW", "params": { "lr": 0.001, "betas": [0.8, 0.999], "eps": 1e-8, "weight_decay": 3e-7 } } } ``` 但在这种情况下，您需要自己同步[`Trainer`]命令行参数和DeepSpeed配置。如果您想使用上面未列出的其他优化器，您将不得不将其添加到顶层配置中。 ```json { "zero_allow_untested_optimizer": true } ``` 类似于 `AdamW`，您可以配置其他官方支持的优化器。只是记住这些可能有不同的配置值。例如，对于Adam，您可能需要将 `weight_decay` 设置在 `0.01` 左右。此外，当与DeepSpeed的CPU Adam优化器一起使用时，offload的效果最好。如果您想在offload时使用不同的优化器，自 `deepspeed==0.8.3` 起，您还需要添加： ```json { "zero_force_ds_cpu_optimizer": false } ``` 到顶层配置中。 <a id='deepspeed-scheduler'></a> #### Scheduler DeepSpeed支持`LRRangeTest`、`OneCycle`、`WarmupLR`和`WarmupDecayLR`学习率调度器。完整文档在[这里](https://www.deepspeed.ai/docs/config-json/#scheduler-parameters)。以下是🤗 Transformers 和 DeepSpeed 之间的调度器重叠部分： - 通过 `--lr_scheduler_type constant_with_warmup` 实现 `WarmupLR` - 通过 `--lr_scheduler_type linear` 实现 `WarmupDecayLR`。这也是 `--lr_scheduler_type` 的默认值，因此，如果不配置调度器，这将是默认配置的调度器。如果在配置文件中不配置 `scheduler` 条目，[`Trainer`] 将使用 `--lr_scheduler_type`、`--learning_rate` 和 `--warmup_steps` 或 `--warmup_ratio` 的值来配置其🤗 Transformers 版本。以下是 `WarmupLR` 的自动配置示例： ```json { "scheduler": { "type": "WarmupLR", "params": { "warmup_min_lr": "auto", "warmup_max_lr": "auto", "warmup_num_steps": "auto" } } } ``` 由于使用了 *"auto"*，[`Trainer`] 的参数将在配置文件中设置正确的值。这是为了有一个明确的值来源，并避免在不同地方设置学习率等值时难以找到的错误。命令行配置高于其他。被设置的值包括： - `warmup_min_lr` 的值为 `0`。 - `warmup_max_lr` 的值为 `--learning_rate`。 - `warmup_num_steps` 的值为 `--warmup_steps`（如果提供）。否则，将使用 `--warmup_ratio` 乘以训练步骤的数量，并四舍五入。 - `total_num_steps` 的值为 `--max_steps` 或者如果没有提供，将在运行时根据环境、数据集的大小和其他命令行参数（对于 `WarmupDecayLR` 来说需要）自动推导。当然，您可以接管任何或所有的配置值，并自行设置这些值： ```json { "scheduler": { "type": "WarmupLR", "params": { "warmup_min_lr": 0, "warmup_max_lr": 0.001, "warmup_num_steps": 1000 } } } ``` 但在这种情况下，您需要自己同步[`Trainer`]命令行参数和DeepSpeed配置。例如，对于 `WarmupDecayLR`，您可以使用以下条目： ```json { "scheduler": { "type": "WarmupDecayLR", "params": { "last_batch_iteration": -1, "total_num_steps": "auto", "warmup_min_lr": "auto", "warmup_max_lr": "auto", "warmup_num_steps": "auto" } } } ``` 然后，`total_num_steps`、`warmup_max_lr`、`warmup_num_steps` 和 `total_num_steps` 将在加载时设置。 <a id='deepspeed-fp32'></a> ### fp32精度 DeepSpeed支持完整的fp32和fp16混合精度。由于fp16混合精度具有更小的内存需求和更快的速度，唯一不使用它的时候是当您使用的模型在这种训练模式下表现不佳时。通常，当模型没有在fp16混合精度下进行预训练时（例如，bf16预训练模型经常出现这种情况），会出现这种情况。这样的模型可能会发生溢出或下溢，导致 `NaN` 损失。如果是这种情况，那么您将希望使用完整的fp32模式，通过显式禁用默认启用的fp16混合精度模式： ```json { "fp16": { "enabled": false, } } ``` 如果您使用基于Ampere架构的GPU，PyTorch版本1.7及更高版本将自动切换到使用更高效的tf32格式进行一些操作，但结果仍将以fp32格式呈现。有关详细信息和基准测试，请参见[TensorFloat-32(TF32) on Ampere devices](https://pytorch.org/docs/stable/notes/cuda.html#tensorfloat-32-tf32-on-ampere-devices)。如果出于某种原因您不希望使用它，该文档包括有关如何禁用此自动转换的说明。在🤗 Trainer中，你可以使用 `--tf32` 来启用它，或使用 `--tf32 0` 或 `--no_tf32` 来禁用它。默认情况下，使用PyTorch的默认设置。 <a id='deepspeed-amp'></a> ### 自动混合精度您可以使用自动混合精度，可以选择使用类似 PyTorch AMP 的方式，也可以选择使用类似 Apex 的方式： ### fp16 要配置PyTorch AMP-like 的 fp16（float16）模式，请设置： ```json { "fp16": { "enabled": "auto", "loss_scale": 0, "loss_scale_window": 1000, "initial_scale_power": 16, "hysteresis": 2, "min_loss_scale": 1 } } ``` 并且，[`Trainer`]将根据`args.fp16_backend`的值自动启用或禁用它。其余的配置值由您决定。当传递`--fp16 --fp16_backend amp`或`--fp16_full_eval`命令行参数时，此模式将被启用。您也可以显式地启用/禁用此模式： ```json { "fp16": { "enabled": true, "loss_scale": 0, "loss_scale_window": 1000, "initial_scale_power": 16, "hysteresis": 2, "min_loss_scale": 1 } } ``` 但是之后您需要自己同步[`Trainer`]命令行参数和DeepSpeed配置。以下是[相关文档](https://www.deepspeed.ai/docs/config-json/#fp16-training-options) ### bf16 如果需要使用bfloat16而不是fp16，那么可以使用以下配置部分： ```json { "bf16": { "enabled": "auto" } } ``` bf16具有与fp32相同的动态范围，因此不需要损失缩放。当传递`--bf16`或`--bf16_full_eval`命令行参数时，启用此模式。您还可以显式地启用/禁用此模式： ```json { "bf16": { "enabled": true } } ``` <Tip> 在`deepspeed==0.6.0`版本中，bf16支持是新的实验性功能。如果您启用了bf16来进行[梯度累积](#gradient-accumulation)，您需要意识到它会以bf16累积梯度，这可能不是您想要的，因为这种格式的低精度可能会导致lossy accumulation。修复这个问题的工作正在努力进行，同时提供了使用更高精度的`dtype`（fp16或fp32）的选项。 </Tip> ### NCCL集合在训练过程中，有两种数据类型：`dtype`和用于通信收集操作的`dtype`，如各种归约和收集/分散操作。所有的gather/scatter操作都是在数据相同的`dtype`中执行的，所以如果您正在使用bf16的训练模式，那么它将在bf16中进行gather操作 - gather操作是非损失性的。各种reduce操作可能会是非常损失性的，例如当梯度在多个gpu上平均时，如果通信是在fp16或bf16中进行的，那么结果可能是有损失性的 - 因为当在一个低精度中添加多个数字时，结果可能不是精确的。更糟糕的是，bf16比fp16具有更低的精度。通常，当平均梯度时，损失最小，这些梯度通常非常小。因此，对于半精度训练，默认情况下，fp16被用作reduction操作的默认值。但是，您可以完全控制这个功能，如果你选择的话，您可以添加一个小的开销，并确保reductions将使用fp32作为累积数据类型，只有当结果准备好时，它才会降级到您在训练中使用的半精度`dtype`。要覆盖默认设置，您只需添加一个新的配置条目： ```json { "communication_data_type": "fp32" } ``` 根据这个信息，有效的值包括"fp16"、"bfp16"和"fp32"。注意：在stage zero 3中，bf16通信数据类型存在一个bug，该问题已在`deepspeed==0.8.1`版本中得到修复。 ### apex 配置apex AMP-like模式： ```json "amp": { "enabled": "auto", "opt_level": "auto" } ``` 并且，[`Trainer`]将根据`args.fp16_backend`和`args.fp16_opt_level`的值自动配置它。当传递`--fp16 --fp16_backend apex --fp16_opt_level 01`命令行参数时，此模式将被启用。您还可以显式配置此模式： ```json { "amp": { "enabled": true, "opt_level": "O1" } } ``` 但是，您需要自己同步[`Trainer`]命令行参数和DeepSpeed配置。这里是[文档](https://www.deepspeed.ai/docs/config-json/#automatic-mixed-precision-amp-training-options) <a id='deepspeed-bs'></a> ### Batch Size 配置batch size可以使用如下参数: ```json { "train_batch_size": "auto", "train_micro_batch_size_per_gpu": "auto" } ``` 并且，[`Trainer`]将自动将`train_micro_batch_size_per_gpu`设置为`args.per_device_train_batch_size`的值，并将`train_batch_size`设置为`args.world_size * args.per_device_train_batch_size * args.gradient_accumulation_steps`。您也可以显式设置这些值： ```json { "train_batch_size": 12, "train_micro_batch_size_per_gpu": 4 } ``` 但是，您需要自己同步[`Trainer`]命令行参数和DeepSpeed配置。 <a id='deepspeed-grad-acc'></a> ### Gradient Accumulation 配置gradient accumulation设置如下: ```json { "gradient_accumulation_steps": "auto" } ``` 并且，[`Trainer`]将自动将其设置为`args.gradient_accumulation_steps`的值。您也可以显式设置这个值： ```json { "gradient_accumulation_steps": 3 } ``` 但是，您需要自己同步[`Trainer`]命令行参数和DeepSpeed配置。 <a id='deepspeed-grad-clip'></a> ### Gradient Clipping 配置gradient clipping如下: ```json { "gradient_clipping": "auto" } ``` 并且，[`Trainer`]将自动将其设置为`args.max_grad_norm`的值。您也可以显式设置这个值： ```json { "gradient_clipping": 1.0 } ``` 但是，您需要自己同步[`Trainer`]命令行参数和DeepSpeed配置。 <a id='deepspeed-weight-extraction'></a> ### 获取模型权重只要您继续使用DeepSpeed进行训练和恢复，您就不需要担心任何事情。DeepSpeed在其自定义检查点优化器文件中存储fp32主权重，这些文件是`global_step*/*optim_states.pt`（这是glob模式），并保存在正常的checkpoint下。 **FP16权重：** 当模型保存在ZeRO-2下时，您最终会得到一个包含模型权重的普通`pytorch_model.bin`文件，但它们只是权重的fp16版本。在ZeRO-3下，事情要复杂得多，因为模型权重分布在多个GPU上，因此需要`"stage3_gather_16bit_weights_on_model_save": true`才能让`Trainer`保存fp16版本的权重。如果这个设置是`False`，`pytorch_model.bin`将不会被创建。这是因为默认情况下，DeepSpeed的`state_dict`包含一个占位符而不是实际的权重。如果我们保存这个`state_dict`，就无法再加载它了。 ```json { "zero_optimization": { "stage3_gather_16bit_weights_on_model_save": true } } ``` **FP32权重：** 虽然fp16权重适合恢复训练，但如果您完成了模型的微调并希望将其上传到[models hub](https://huggingface.co/models)或传递给其他人，您很可能想要获取fp32权重。这最好不要在训练期间完成，因为这需要大量内存，因此最好在训练完成后离线进行。但是，如果需要并且有充足的空闲CPU内存，可以在相同的训练脚本中完成。以下部分将讨论这两种方法。 **实时FP32权重恢复：** 如果您的模型很大，并且在训练结束时几乎没有剩余的空闲CPU内存，这种方法可能不起作用。如果您至少保存了一个检查点，并且想要使用最新的一个，可以按照以下步骤操作： ```python from transformers.trainer_utils import get_last_checkpoint from deepspeed.utils.zero_to_fp32 import load_state_dict_from_zero_checkpoint checkpoint_dir = get_last_checkpoint(trainer.args.output_dir) fp32_model = load_state_dict_from_zero_checkpoint(trainer.model, checkpoint_dir) ``` 如果您在使用`--load_best_model_at_end`类：*~transformers.TrainingArguments*参数（用于跟踪最佳检查点），那么你可以首先显式地保存最终模型，然后再执行相同的操作： ```python from deepspeed.utils.zero_to_fp32 import load_state_dict_from_zero_checkpoint checkpoint_dir = os.path.join(trainer.args.output_dir, "checkpoint-final") trainer.deepspeed.save_checkpoint(checkpoint_dir) fp32_model = load_state_dict_from_zero_checkpoint(trainer.model, checkpoint_dir) ``` <Tip> 注意，一旦运行了`load_state_dict_from_zero_checkpoint`，该模型将不再可以在相同的应用程序的DeepSpeed上下文中使用。也就是说，您需要重新初始化deepspeed引擎，因为`model.load_state_dict(state_dict)`会从其中移除所有的DeepSpeed相关点。所以您只能训练结束时这样做。 </Tip> 当然，您不必使用类：*~transformers.Trainer*，您可以根据你的需求调整上面的示例。如果您出于某种原因想要更多的优化，您也可以提取权重的fp32 `state_dict`并按照以下示例进行操作： ```python from deepspeed.utils.zero_to_fp32 import get_fp32_state_dict_from_zero_checkpoint state_dict = get_fp32_state_dict_from_zero_checkpoint(checkpoint_dir) # already on cpu model = model.cpu() model.load_state_dict(state_dict) ``` **离线FP32权重恢复：** DeepSpeed会创建一个特殊的转换脚本`zero_to_fp32.py`，并将其放置在checkpoint文件夹的顶层。使用此脚本，您可以在任何时候提取权重。该脚本是独立的，您不再需要配置文件或`Trainer`来执行提取操作。假设您的checkpoint文件夹如下所示： ```bash $ ls -l output_dir/checkpoint-1/ -rw-rw-r-- 1 stas stas 1.4K Mar 27 20:42 config.json drwxrwxr-x 2 stas stas 4.0K Mar 25 19:52 global_step1/ -rw-rw-r-- 1 stas stas 12 Mar 27 13:16 latest -rw-rw-r-- 1 stas stas 827K Mar 27 20:42 optimizer.pt -rw-rw-r-- 1 stas stas 231M Mar 27 20:42 pytorch_model.bin -rw-rw-r-- 1 stas stas 623 Mar 27 20:42 scheduler.pt -rw-rw-r-- 1 stas stas 1.8K Mar 27 20:42 special_tokens_map.json -rw-rw-r-- 1 stas stas 774K Mar 27 20:42 spiece.model -rw-rw-r-- 1 stas stas 1.9K Mar 27 20:42 tokenizer_config.json -rw-rw-r-- 1 stas stas 339 Mar 27 20:42 trainer_state.json -rw-rw-r-- 1 stas stas 2.3K Mar 27 20:42 training_args.bin -rwxrw-r-- 1 stas stas 5.5K Mar 27 13:16 zero_to_fp32.py* ``` 在这个例子中，只有一个DeepSpeed检查点子文件夹*global_step1*。因此，要重构fp32权重，只需运行： ```bash python zero_to_fp32.py . pytorch_model.bin ``` 这就是它。`pytorch_model.bin`现在将包含从多个GPUs合并的完整的fp32模型权重。该脚本将自动能够处理ZeRO-2或ZeRO-3 checkpoint。 `python zero_to_fp32.py -h`将为您提供使用细节。该脚本将通过文件`latest`的内容自动发现deepspeed子文件夹，在当前示例中，它将包含`global_step1`。注意：目前该脚本需要2倍于最终fp32模型权重的通用内存。 ### ZeRO-3 和 Infinity Nuances ZeRO-3与ZeRO-2有很大的不同，主要是因为它的参数分片功能。 ZeRO-Infinity进一步扩展了ZeRO-3，以支持NVMe内存和其他速度和可扩展性改进。尽管所有努力都是为了在不需要对模型进行任何特殊更改的情况下就能正常运行，但在某些情况下，您可能需要以下信息。 #### 构建大模型 DeepSpeed/ZeRO-3可以处理参数量达到数万亿的模型，这些模型可能无法适应现有的内存。在这种情况下，如果您还是希望初始化更快地发生，可以使用*deepspeed.zero.Init()*上下文管理器（也是一个函数装饰器）来初始化模型，如下所示： ```python from transformers import T5ForConditionalGeneration, T5Config import deepspeed with deepspeed.zero.Init(): config = T5Config.from_pretrained("google-t5/t5-small") model = T5ForConditionalGeneration(config) ``` 如您所见，这会为您随机初始化一个模型。如果您想使用预训练模型，`model_class.from_pretrained`将在`is_deepspeed_zero3_enabled()`返回`True`的情况下激活此功能，目前这是通过传递的DeepSpeed配置文件中的ZeRO-3配置部分设置的。因此，在调用`from_pretrained`之前，您必须创建**TrainingArguments**对象。以下是可能的顺序示例： ```python from transformers import AutoModel, Trainer, TrainingArguments training_args = TrainingArguments(..., deepspeed=ds_config) model = AutoModel.from_pretrained("google-t5/t5-small") trainer = Trainer(model=model, args=training_args, ...) ``` 如果您使用的是官方示例脚本，并且命令行参数中包含`--deepspeed ds_config.json`且启用了ZeRO-3配置，那么一切都已经为您准备好了，因为这是示例脚本的编写方式。注意：如果模型的fp16权重无法适应单个GPU的内存，则必须使用此功能。有关此方法和其他相关功能的完整详细信息，请参阅[构建大模型](https://deepspeed.readthedocs.io/en/latest/zero3.html#constructing-massive-models)。此外，在加载fp16预训练模型时，您希望`from_pretrained`使用`torch_dtype=torch.float16`。详情请参见[from_pretrained-torch-dtype](#from_pretrained-torch-dtype)。 #### 参数收集在多个GPU上使用ZeRO-3时，没有一个GPU拥有所有参数，除非它是当前执行层的参数。因此，如果您需要一次访问所有层的所有参数，有一个特定的方法可以实现。您可能不需要它，但如果您需要，请参考[参数收集](https://deepspeed.readthedocs.io/en/latest/zero3.html#manual-parameter-coordination)。然而，我们在多个地方确实使用了它，其中一个例子是在`from_pretrained`中加载预训练模型权重。我们一次加载一层，然后立即将其分区到所有参与的GPU上，因为对于非常大的模型，无法在一个GPU上一次性加载并将其分布到多个GPU上，因为内存限制。此外，在ZeRO-3下，如果您编写自己的代码并遇到看起来像这样的模型参数权重： ```python tensor([1.0], device="cuda:0", dtype=torch.float16, requires_grad=True) ``` 强调`tensor([1.])`，或者如果您遇到一个错误，它说参数的大小是`1`，而不是某个更大的多维形状，这意味着参数被划分了，你看到的是一个ZeRO-3占位符。 <a id='deepspeed-zero-inference'></a> ### ZeRO 推理 "ZeRO 推断" 使用与 "ZeRO-3 训练" 相同的配置。您只需要去掉优化器和调度器部分。实际上，如果您希望与训练共享相同的配置文件，您可以将它们保留在配置文件中，它们只会被忽略。您只需要传递通常的[`TrainingArguments`]参数。例如： ```bash deepspeed --num_gpus=2 your_program.py <normal cl args> --do_eval --deepspeed ds_config.json ``` 唯一的重要事情是您需要使用ZeRO-3配置，因为ZeRO-2对于推理没有任何优势，因为只有ZeRO-3才对参数进行分片，而ZeRO-1则对梯度和优化器状态进行分片。以下是在DeepSpeed下运行`run_translation.py`启用所有可用GPU的示例： ```bash deepspeed examples/pytorch/translation/run_translation.py \ --deepspeed tests/deepspeed/ds_config_zero3.json \ --model_name_or_path google-t5/t5-small --output_dir output_dir \ --do_eval --max_eval_samples 50 --warmup_steps 50 \ --max_source_length 128 --val_max_target_length 128 \ --overwrite_output_dir --per_device_eval_batch_size 4 \ --predict_with_generate --dataset_config "ro-en" --fp16 \ --source_lang en --target_lang ro --dataset_name wmt16 \ --source_prefix "translate English to Romanian: " ``` 由于在推理阶段，优化器状态和梯度不需要额外的大量内存，您应该能够将更大的批次和/或序列长度放到相同的硬件上。此外，DeepSpeed目前正在开发一个名为Deepspeed-Inference的相关产品，它与ZeRO技术无关，而是使用张量并行来扩展无法适应单个GPU的模型。这是一个正在进行的工作，一旦该产品完成，我们将提供集成。 ### 内存要求由于 DeepSpeed ZeRO 可以将内存卸载到 CPU（和 NVMe），该框架提供了一些工具，允许根据使用的 GPU 数量告知将需要多少 CPU 和 GPU 内存。让我们估计在单个GPU上微调"bigscience/T0_3B"所需的内存： ```bash $ python -c 'from transformers import AutoModel; \ from deepspeed.runtime.zero.stage3 import estimate_zero3_model_states_mem_needs_all_live; \ model = AutoModel.from_pretrained("bigscience/T0_3B"); \ estimate_zero3_model_states_mem_needs_all_live(model, num_gpus_per_node=1, num_nodes=1)' [...] Estimated memory needed for params, optim states and gradients for a: HW: Setup with 1 node, 1 GPU per node. SW: Model with 2783M total params, 65M largest layer params. per CPU | per GPU | Options 70.00GB | 0.25GB | offload_param=cpu , offload_optimizer=cpu , zero_init=1 70.00GB | 0.25GB | offload_param=cpu , offload_optimizer=cpu , zero_init=0 62.23GB | 5.43GB | offload_param=none, offload_optimizer=cpu , zero_init=1 62.23GB | 5.43GB | offload_param=none, offload_optimizer=cpu , zero_init=0 0.37GB | 46.91GB | offload_param=none, offload_optimizer=none, zero_init=1 15.56GB | 46.91GB | offload_param=none, offload_optimizer=none, zero_init=0 ``` 因此，您可以将模型拟合在单个80GB的GPU上，不进行CPU offload，或者使用微小的8GB GPU，但需要约60GB的CPU内存。（请注意，这仅是参数、优化器状态和梯度所需的内存 - 您还需要为CUDA内核、激活值和临时变量分配更多的内存。）然后，这是成本与速度的权衡。购买/租用较小的 GPU（或较少的 GPU，因为您可以使用多个 GPU 进行 Deepspeed ZeRO）。但这样会更慢，因此即使您不关心完成某项任务的速度，减速也直接影响 GPU 使用的持续时间，从而导致更大的成本。因此，请进行实验并比较哪种方法效果最好。如果您有足够的GPU内存，请确保禁用CPU/NVMe卸载，因为这会使所有操作更快。例如，让我们重复相同的操作，使用2个GPU： ```bash $ python -c 'from transformers import AutoModel; \ from deepspeed.runtime.zero.stage3 import estimate_zero3_model_states_mem_needs_all_live; \ model = AutoModel.from_pretrained("bigscience/T0_3B"); \ estimate_zero3_model_states_mem_needs_all_live(model, num_gpus_per_node=2, num_nodes=1)' [...] Estimated memory needed for params, optim states and gradients for a: HW: Setup with 1 node, 2 GPUs per node. SW: Model with 2783M total params, 65M largest layer params. per CPU | per GPU | Options 70.00GB | 0.25GB | offload_param=cpu , offload_optimizer=cpu , zero_init=1 70.00GB | 0.25GB | offload_param=cpu , offload_optimizer=cpu , zero_init=0 62.23GB | 2.84GB | offload_param=none, offload_optimizer=cpu , zero_init=1 62.23GB | 2.84GB | offload_param=none, offload_optimizer=cpu , zero_init=0 0.74GB | 23.58GB | offload_param=none, offload_optimizer=none, zero_init=1 31.11GB | 23.58GB | offload_param=none, offload_optimizer=none, zero_init=0 ``` 所以，您需要2个32GB或更高的GPU，且不进行CPU卸载。如需了解更多信息，请参阅[内存估算器](https://deepspeed.readthedocs.io/en/latest/memory.html)。 ### 归档Issues 请按照以下步骤提交问题，以便我们能够迅速找到问题并帮助您解除工作阻塞。在您的报告中，请始终包括以下内容： 1. 完整的Deepspeed配置文件 2. 如果使用了[`Trainer`]，则包括命令行参数；如果自己编写了Trainer设置，则包括[`TrainingArguments`]参数。请不要导出[`TrainingArguments`]，因为它有几十个与问题无关的条目。 3. 输出： ```bash python -c 'import torch; print(f"torch: {torch.__version__}")' python -c 'import transformers; print(f"transformers: {transformers.__version__}")' python -c 'import deepspeed; print(f"deepspeed: {deepspeed.__version__}")' ``` 4. 如果可能，请包含一个Google Colab notebook链接，我们可以使用它来重现问题。您可以使用这个[notebook](https://github.com/stas00/porting/blob/master/transformers/deepspeed/DeepSpeed_on_colab_CLI.ipynb)作为起点。 5. 除非不可能，否则请始终使用标准数据集，而不是自定义数据集。 6. 如果可能，尝试使用现有[示例](https://github.com/huggingface/transformers/tree/main/examples/pytorch)之一来重现问题。需要考虑的因素： - Deepspeed通常不是问题的原因。一些已提交的问题被证明与Deepspeed无关。也就是说，一旦将Deepspeed从设置中移除，问题仍然存在。因此，如果问题明显与DeepSpeed相关，例如您可以看到有一个异常并且可以看到DeepSpeed模块涉及其中，请先重新测试没有DeepSpeed的设置。只有当问题仍然存在时，才向Deepspeed提供所有必需的细节。 - 如果您明确问题是在Deepspeed核心中而不是集成部分，请直接向[Deepspeed](https://github.com/microsoft/DeepSpeed/)提交问题。如果您不确定，请不要担心，无论使用哪个issue跟踪问题都可以，一旦您发布问题，我们会弄清楚并将其重定向到另一个issue跟踪（如果需要的话）。 ### Troubleshooting #### 启动时`deepspeed`进程被终止，没有回溯如果启动时`deepspeed`进程被终止，没有回溯，这通常意味着程序尝试分配的CPU内存超过了系统的限制或进程被允许分配的内存，操作系统内核杀死了该进程。这是因为您的配置文件很可能将`offload_optimizer`或`offload_param`或两者都配置为卸载到`cpu`。如果您有NVMe，可以尝试在ZeRO-3下卸载到NVMe。这里是如何[估计特定模型所需的内存](https://deepspeed.readthedocs.io/en/latest/memory.html)。 #### 训练和/或评估/预测loss为`NaN` 这种情况通常发生在使用bf16混合精度模式预训练的模型试图在fp16（带或不带混合精度）下使用时。大多数在TPU上训练的模型以及由谷歌发布的模型都属于这个类别（例如，几乎所有基于t5的模型）。在这种情况下，解决方案是要么使用fp32，要么在支持的情况下使用bf16（如TPU、Ampere GPU或更新的版本）。另一个问题可能与使用fp16有关。当您配置此部分时： ```json { "fp16": { "enabled": "auto", "loss_scale": 0, "loss_scale_window": 1000, "initial_scale_power": 16, "hysteresis": 2, "min_loss_scale": 1 } } ``` 并且您在日志中看到Deepspeed报告`OVERFLOW`如下 ``` 0%| | 0/189 [00:00<?, ?it/s] [deepscale] OVERFLOW! Rank 0 Skipping step. Attempted loss scale: 262144, reducing to 262144 1%|▌ | 1/189 [00:00<01:26, 2.17it/s] [deepscale] OVERFLOW! Rank 0 Skipping step. Attempted loss scale: 262144, reducing to 131072.0 1%|█▏ [...] [deepscale] OVERFLOW! Rank 0 Skipping step. Attempted loss scale: 1, reducing to 1 14%|████████████████▌ | 27/189 [00:14<01:13, 2.21it/s] [deepscale] OVERFLOW! Rank 0 Skipping step. Attempted loss scale: 1, reducing to 1 15%|█████████████████▏ | 28/189 [00:14<01:13, 2.18it/s] [deepscale] OVERFLOW! Rank 0 Skipping step. Attempted loss scale: 1, reducing to 1 15%|█████████████████▊ | 29/189 [00:15<01:13, 2.18it/s] [deepscale] OVERFLOW! Rank 0 Skipping step. Attempted loss scale: 1, reducing to 1 [...] ``` 这意味着Deepspeed损失缩放器无法找到一个克服损失溢出的缩放系数。在这种情况下，通常需要提高`initial_scale_power`的值。将其设置为`"initial_scale_power": 32`通常会解决问题。 ### 注意事项 - 尽管 DeepSpeed 有一个可安装的 PyPI 包，但强烈建议从源代码安装它，以最好地匹配您的硬件，如果您需要启用某些功能，如 1-bit Adam，这些功能在 pypi 发行版中不可用。 - 您不必使用🤗 Transformers的 [`Trainer`] 来使用 DeepSpeed - 您可以使用任何模型与自己的训练器，您还需要根据 [DeepSpeed 集成说明](https://www.deepspeed.ai/getting-started/#writing-deepspeed-models) 调整后者。 ## Non-Trainer Deepspeed集成当`Trainer`没有被使用时，`~integrations.HfDeepSpeedConfig`被用来将Deepspeed集成到huggingface的Transformers核心功能中。它唯一做的事情就是在`from_pretrained`调用期间处理Deepspeed ZeRO-3参数收集和将模型自动分割到多个GPU上。除此之外，您需要自己完成其他所有工作。当使用`Trainer`时，所有事情都自动得到了处理。当不使用`Trainer`时，为了高效地部署Deepspeed ZeRO-3，您必须在实例化模型之前实例化`~integrations.HfDeepSpeedConfig`对象并保持该对象活跃。如果您正在使用Deepspeed ZeRO-1或ZeRO-2，您根本不需要使用`HfDeepSpeedConfig`。以预训练模型为例: ```python from transformers.integrations import HfDeepSpeedConfig from transformers import AutoModel import deepspeed ds_config = {...} # deepspeed config object or path to the file # must run before instantiating the model to detect zero 3 dschf = HfDeepSpeedConfig(ds_config) # keep this object alive model = AutoModel.from_pretrained("openai-community/gpt2") engine = deepspeed.initialize(model=model, config_params=ds_config, ...) ``` 或者以非预训练模型为例： ```python from transformers.integrations import HfDeepSpeedConfig from transformers import AutoModel, AutoConfig import deepspeed ds_config = {...} # deepspeed config object or path to the file # must run before instantiating the model to detect zero 3 dschf = HfDeepSpeedConfig(ds_config) # keep this object alive config = AutoConfig.from_pretrained("openai-community/gpt2") model = AutoModel.from_config(config) engine = deepspeed.initialize(model=model, config_params=ds_config, ...) ``` 请注意，如果您没有使用[`Trainer`]集成，您完全需要自己动手。基本上遵循[Deepspeed](https://www.deepspeed.ai/)网站上的文档。同时，您必须显式配置配置文件 - 不能使用`"auto"`值，而必须放入实际值。 ## HfDeepSpeedConfig [[autodoc]] integrations.HfDeepSpeedConfig - all ### 自定义DeepSpeed ZeRO推理以下是一个示例，演示了在无法将模型放入单个 GPU 时如果不使用[Trainer]进行 DeepSpeed ZeRO 推理。该解决方案包括使用额外的 GPU 或/和将 GPU 内存卸载到 CPU 内存。这里要理解的重要细微差别是，ZeRO的设计方式可以让您在不同的GPU上并行处理不同的输入。这个例子有很多注释，并且是自文档化的。请确保： 1. 如果您有足够的GPU内存（因为这会减慢速度），禁用CPU offload。 2. 如果您拥有Ampere架构或更新的GPU，启用bf16以加快速度。如果您没有这种硬件，只要不使用任何在bf16混合精度下预训练的模型（如大多数t5模型），就可以启用fp16。否则这些模型通常在fp16中溢出，您会看到输出无效结果。 ```python #!/usr/bin/env python # This script demonstrates how to use Deepspeed ZeRO in an inference mode when one can't fit a model # into a single GPU # # 1. Use 1 GPU with CPU offload # 2. Or use multiple GPUs instead # # First you need to install deepspeed: pip install deepspeed # # Here we use a 3B "bigscience/T0_3B" model which needs about 15GB GPU RAM - so 1 largish or 2 # small GPUs can handle it. or 1 small GPU and a lot of CPU memory. # # To use a larger model like "bigscience/T0" which needs about 50GB, unless you have an 80GB GPU - # you will need 2-4 gpus. And then you can adapt the script to handle more gpus if you want to # process multiple inputs at once. # # The provided deepspeed config also activates CPU memory offloading, so chances are that if you # have a lot of available CPU memory and you don't mind a slowdown you should be able to load a # model that doesn't normally fit into a single GPU. If you have enough GPU memory the program will # run faster if you don't want offload to CPU - so disable that section then. # # To deploy on 1 gpu: # # deepspeed --num_gpus 1 t0.py # or: # python -m torch.distributed.run --nproc_per_node=1 t0.py # # To deploy on 2 gpus: # # deepspeed --num_gpus 2 t0.py # or: # python -m torch.distributed.run --nproc_per_node=2 t0.py from transformers import AutoTokenizer, AutoConfig, AutoModelForSeq2SeqLM from transformers.integrations import HfDeepSpeedConfig import deepspeed import os import torch os.environ["TOKENIZERS_PARALLELISM"] = "false" # To avoid warnings about parallelism in tokenizers # distributed setup local_rank = int(os.getenv("LOCAL_RANK", "0")) world_size = int(os.getenv("WORLD_SIZE", "1")) torch.cuda.set_device(local_rank) deepspeed.init_distributed() model_name = "bigscience/T0_3B" config = AutoConfig.from_pretrained(model_name) model_hidden_size = config.d_model # batch size has to be divisible by world_size, but can be bigger than world_size train_batch_size = 1 * world_size # ds_config notes # # - enable bf16 if you use Ampere or higher GPU - this will run in mixed precision and will be # faster. # # - for older GPUs you can enable fp16, but it'll only work for non-bf16 pretrained models - e.g. # all official t5 models are bf16-pretrained # # - set offload_param.device to "none" or completely remove the `offload_param` section if you don't # - want CPU offload # # - if using `offload_param` you can manually finetune stage3_param_persistence_threshold to control # - which params should remain on gpus - the larger the value the smaller the offload size # # For in-depth info on Deepspeed config see # https://huggingface.co/docs/transformers/main/main_classes/deepspeed # keeping the same format as json for consistency, except it uses lower case for true/false # fmt: off ds_config = { "fp16": { "enabled": False }, "bf16": { "enabled": False }, "zero_optimization": { "stage": 3, "offload_param": { "device": "cpu", "pin_memory": True }, "overlap_comm": True, "contiguous_gradients": True, "reduce_bucket_size": model_hidden_size * model_hidden_size, "stage3_prefetch_bucket_size": 0.9 * model_hidden_size * model_hidden_size, "stage3_param_persistence_threshold": 10 * model_hidden_size }, "steps_per_print": 2000, "train_batch_size": train_batch_size, "train_micro_batch_size_per_gpu": 1, "wall_clock_breakdown": False } # fmt: on # next line instructs transformers to partition the model directly over multiple gpus using # deepspeed.zero.Init when model's `from_pretrained` method is called. # # **it has to be run before loading the model AutoModelForSeq2SeqLM.from_pretrained(model_name)** # # otherwise the model will first be loaded normally and only partitioned at forward time which is # less efficient and when there is little CPU RAM may fail dschf = HfDeepSpeedConfig(ds_config) # keep this object alive # now a model can be loaded. model = AutoModelForSeq2SeqLM.from_pretrained(model_name) # initialise Deepspeed ZeRO and store only the engine object ds_engine = deepspeed.initialize(model=model, config_params=ds_config)[0] ds_engine.module.eval() # inference # Deepspeed ZeRO can process unrelated inputs on each GPU. So for 2 gpus you process 2 inputs at once. # If you use more GPUs adjust for more. # And of course if you have just one input to process you then need to pass the same string to both gpus # If you use only one GPU, then you will have only rank 0. rank = torch.distributed.get_rank() if rank == 0: text_in = "Is this review positive or negative? Review: this is the best cast iron skillet you will ever buy" elif rank == 1: text_in = "Is this review positive or negative? Review: this is the worst restaurant ever" tokenizer = AutoTokenizer.from_pretrained(model_name) inputs = tokenizer.encode(text_in, return_tensors="pt").to(device=local_rank) with torch.no_grad(): outputs = ds_engine.module.generate(inputs, synced_gpus=True) text_out = tokenizer.decode(outputs[0], skip_special_tokens=True) print(f"rank{rank}:\n in={text_in}\n out={text_out}") ``` 让我们保存它为 `t0.py`并运行： ```bash $ deepspeed --num_gpus 2 t0.py rank0: in=Is this review positive or negative? Review: this is the best cast iron skillet you will ever buy out=Positive rank1: in=Is this review positive or negative? Review: this is the worst restaurant ever out=negative ``` 这是一个非常基本的例子，您需要根据自己的需求进行修改。 ### `generate` 的差异在使用ZeRO stage 3的多GPU时，需要通过调用`generate(..., synced_gpus=True)`来同步GPU。如果一个GPU在其它GPU之前完成生成，整个系统将挂起，因为其他GPU无法从停止生成的GPU接收权重分片。从`transformers>=4.28`开始，如果没有明确指定`synced_gpus`，检测到这些条件后它将自动设置为`True`。但如果您需要覆盖`synced_gpus`的值，仍然可以这样做。 ## 测试 DeepSpeed 集成如果您提交了一个涉及DeepSpeed集成的PR，请注意我们的CircleCI PR CI设置没有GPU，因此我们只在另一个CI夜间运行需要GPU的测试。因此，如果您在PR中获得绿色的CI报告，并不意味着DeepSpeed测试通过。要运行DeepSpeed测试，请至少运行以下命令： ```bash RUN_SLOW=1 pytest tests/deepspeed/test_deepspeed.py ``` 如果你更改了任何模型或PyTorch示例代码，请同时运行多模型测试。以下将运行所有DeepSpeed测试： ```bash RUN_SLOW=1 pytest tests/deepspeed ``` ## 主要的DeepSpeed资源 - [项目GitHub](https://github.com/microsoft/deepspeed) - [使用文档](https://www.deepspeed.ai/getting-started/) - [API文档](https://deepspeed.readthedocs.io/en/latest/index.html) - [博客文章](https://www.microsoft.com/en-us/research/search/?q=deepspeed) 论文: - [ZeRO: Memory Optimizations Toward Training Trillion Parameter Models](https://arxiv.org/abs/1910.02054) - [ZeRO-Offload: Democratizing Billion-Scale Model Training](https://arxiv.org/abs/2101.06840) - [ZeRO-Infinity: Breaking the GPU Memory Wall for Extreme Scale Deep Learning](https://arxiv.org/abs/2104.07857) 最后，请记住，HuggingFace [`Trainer`]仅集成了DeepSpeed，因此如果您在使用DeepSpeed时遇到任何问题或疑问，请在[DeepSpeed GitHub](https://github.com/microsoft/DeepSpeed/issues)上提交一个issue。

transformers/docs/source/zh/main_classes/deepspeed.md/0

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# 用于推理的多语言模型 [[open-in-colab]] 🤗 Transformers 中有多种多语言模型，它们的推理用法与单语言模型不同。但是，并非*所有*的多语言模型用法都不同。一些模型，例如 [google-bert/bert-base-multilingual-uncased](https://huggingface.co/google-bert/bert-base-multilingual-uncased) 就可以像单语言模型一样使用。本指南将向您展示如何使用不同用途的多语言模型进行推理。 ## XLM XLM 有十个不同的检查点，其中只有一个是单语言的。剩下的九个检查点可以归为两类：使用语言嵌入的检查点和不使用语言嵌入的检查点。 ### 带有语言嵌入的 XLM 以下 XLM 模型使用语言嵌入来指定推理中使用的语言： - `FacebookAI/xlm-mlm-ende-1024` （掩码语言建模，英语-德语） - `FacebookAI/xlm-mlm-enfr-1024` （掩码语言建模，英语-法语） - `FacebookAI/xlm-mlm-enro-1024` （掩码语言建模，英语-罗马尼亚语） - `FacebookAI/xlm-mlm-xnli15-1024` （掩码语言建模，XNLI 数据集语言） - `FacebookAI/xlm-mlm-tlm-xnli15-1024` （掩码语言建模+翻译，XNLI 数据集语言） - `FacebookAI/xlm-clm-enfr-1024` （因果语言建模，英语-法语） - `FacebookAI/xlm-clm-ende-1024` （因果语言建模，英语-德语）语言嵌入被表示一个张量，其形状与传递给模型的 `input_ids` 相同。这些张量中的值取决于所使用的语言，并由分词器的 `lang2id` 和 `id2lang` 属性识别。在此示例中，加载 `FacebookAI/xlm-clm-enfr-1024` 检查点（因果语言建模，英语-法语）： ```py >>> import torch >>> from transformers import XLMTokenizer, XLMWithLMHeadModel >>> tokenizer = XLMTokenizer.from_pretrained("FacebookAI/xlm-clm-enfr-1024") >>> model = XLMWithLMHeadModel.from_pretrained("FacebookAI/xlm-clm-enfr-1024") ``` 分词器的 `lang2id` 属性显示了该模型的语言及其对应的id： ```py >>> print(tokenizer.lang2id) {'en': 0, 'fr': 1} ``` 接下来，创建一个示例输入： ```py >>> input_ids = torch.tensor([tokenizer.encode("Wikipedia was used to")]) # batch size 为 1 ``` 将语言 id 设置为 `"en"` 并用其定义语言嵌入。语言嵌入是一个用 `0` 填充的张量，这个张量应该与 `input_ids` 大小相同。 ```py >>> language_id = tokenizer.lang2id["en"] # 0 >>> langs = torch.tensor([language_id] * input_ids.shape[1]) # torch.tensor([0, 0, 0, ..., 0]) >>> # 我们将其 reshape 为 (batch_size, sequence_length) 大小 >>> langs = langs.view(1, -1) # 现在的形状是 [1, sequence_length] (我们的 batch size 为 1) ``` 现在，你可以将 `input_ids` 和语言嵌入传递给模型： ```py >>> outputs = model(input_ids, langs=langs) ``` [run_generation.py](https://github.com/huggingface/transformers/tree/main/examples/pytorch/text-generation/run_generation.py) 脚本可以使用 `xlm-clm` 检查点生成带有语言嵌入的文本。 ### 不带语言嵌入的 XLM 以下 XLM 模型在推理时不需要语言嵌入： - `FacebookAI/xlm-mlm-17-1280` （掩码语言建模，支持 17 种语言） - `FacebookAI/xlm-mlm-100-1280` （掩码语言建模，支持 100 种语言）与之前的 XLM 检查点不同，这些模型用于通用句子表示。 ## BERT 以下 BERT 模型可用于多语言任务： - `google-bert/bert-base-multilingual-uncased` （掩码语言建模 + 下一句预测，支持 102 种语言） - `google-bert/bert-base-multilingual-cased` （掩码语言建模 + 下一句预测，支持 104 种语言）这些模型在推理时不需要语言嵌入。它们应该能够从上下文中识别语言并进行相应的推理。 ## XLM-RoBERTa 以下 XLM-RoBERTa 模型可用于多语言任务： - `FacebookAI/xlm-roberta-base` （掩码语言建模，支持 100 种语言） - `FacebookAI/xlm-roberta-large` （掩码语言建模，支持 100 种语言） XLM-RoBERTa 使用 100 种语言的 2.5TB 新创建和清理的 CommonCrawl 数据进行了训练。与之前发布的 mBERT 或 XLM 等多语言模型相比，它在分类、序列标记和问答等下游任务上提供了更强大的优势。 ## M2M100 以下 M2M100 模型可用于多语言翻译： - `facebook/m2m100_418M` （翻译） - `facebook/m2m100_1.2B` （翻译）在此示例中，加载 `facebook/m2m100_418M` 检查点以将中文翻译为英文。你可以在分词器中设置源语言： ```py >>> from transformers import M2M100ForConditionalGeneration, M2M100Tokenizer >>> en_text = "Do not meddle in the affairs of wizards, for they are subtle and quick to anger." >>> chinese_text = "不要插手巫師的事務, 因為他們是微妙的, 很快就會發怒." >>> tokenizer = M2M100Tokenizer.from_pretrained("facebook/m2m100_418M", src_lang="zh") >>> model = M2M100ForConditionalGeneration.from_pretrained("facebook/m2m100_418M") ``` 对文本进行分词： ```py >>> encoded_zh = tokenizer(chinese_text, return_tensors="pt") ``` M2M100 强制将目标语言 id 作为第一个生成的标记，以进行到目标语言的翻译。在 `generate` 方法中将 `forced_bos_token_id` 设置为 `en` 以翻译成英语： ```py >>> generated_tokens = model.generate(**encoded_zh, forced_bos_token_id=tokenizer.get_lang_id("en")) >>> tokenizer.batch_decode(generated_tokens, skip_special_tokens=True) 'Do not interfere with the matters of the witches, because they are delicate and will soon be angry.' ``` ## MBart 以下 MBart 模型可用于多语言翻译： - `facebook/mbart-large-50-one-to-many-mmt` （一对多多语言机器翻译，支持 50 种语言） - `facebook/mbart-large-50-many-to-many-mmt` （多对多多语言机器翻译，支持 50 种语言） - `facebook/mbart-large-50-many-to-one-mmt` （多对一多语言机器翻译，支持 50 种语言） - `facebook/mbart-large-50` （多语言翻译，支持 50 种语言） - `facebook/mbart-large-cc25` 在此示例中，加载 `facebook/mbart-large-50-many-to-many-mmt` 检查点以将芬兰语翻译为英语。你可以在分词器中设置源语言： ```py >>> from transformers import AutoTokenizer, AutoModelForSeq2SeqLM >>> en_text = "Do not meddle in the affairs of wizards, for they are subtle and quick to anger." >>> fi_text = "Älä sekaannu velhojen asioihin, sillä ne ovat hienovaraisia ja nopeasti vihaisia." >>> tokenizer = AutoTokenizer.from_pretrained("facebook/mbart-large-50-many-to-many-mmt", src_lang="fi_FI") >>> model = AutoModelForSeq2SeqLM.from_pretrained("facebook/mbart-large-50-many-to-many-mmt") ``` 对文本进行分词： ```py >>> encoded_en = tokenizer(en_text, return_tensors="pt") ``` MBart 强制将目标语言 id 作为第一个生成的标记，以进行到目标语言的翻译。在 `generate` 方法中将 `forced_bos_token_id` 设置为 `en` 以翻译成英语： ```py >>> generated_tokens = model.generate(**encoded_en, forced_bos_token_id=tokenizer.lang_code_to_id["en_XX"]) >>> tokenizer.batch_decode(generated_tokens, skip_special_tokens=True) "Don't interfere with the wizard's affairs, because they are subtle, will soon get angry." ``` 如果你使用的是 `facebook/mbart-large-50-many-to-one-mmt` 检查点，则无需强制目标语言 id 作为第一个生成的令牌，否则用法是相同的。

transformers/docs/source/zh/multilingual.md/0

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# Examples We host a wide range of example scripts for multiple learning frameworks. Simply choose your favorite: [TensorFlow](https://github.com/huggingface/transformers/tree/main/examples/tensorflow), [PyTorch](https://github.com/huggingface/transformers/tree/main/examples/pytorch) or [JAX/Flax](https://github.com/huggingface/transformers/tree/main/examples/flax). We also have some [research projects](https://github.com/huggingface/transformers/tree/main/examples/research_projects), as well as some [legacy examples](https://github.com/huggingface/transformers/tree/main/examples/legacy). Note that unlike the main examples these are not actively maintained, and may require specific older versions of dependencies in order to run. While we strive to present as many use cases as possible, the example scripts are just that - examples. It is expected that they won't work out-of-the-box on your specific problem and that you will be required to change a few lines of code to adapt them to your needs. To help you with that, most of the examples fully expose the preprocessing of the data, allowing you to tweak and edit them as required. Please discuss on the [forum](https://discuss.huggingface.co/) or in an [issue](https://github.com/huggingface/transformers/issues) a feature you would like to implement in an example before submitting a PR; we welcome bug fixes, but since we want to keep the examples as simple as possible it's unlikely that we will merge a pull request adding more functionality at the cost of readability. ## Important note **Important** To make sure you can successfully run the latest versions of the example scripts, you have to **install the library from source** and install some example-specific requirements. To do this, execute the following steps in a new virtual environment: ```bash git clone https://github.com/huggingface/transformers cd transformers pip install . ``` Then cd in the example folder of your choice and run ```bash pip install -r requirements.txt ``` To browse the examples corresponding to released versions of 🤗 Transformers, click on the line below and then on your desired version of the library: <details> <summary>Examples for older versions of 🤗 Transformers</summary> <ul> <li><a href="https://github.com/huggingface/transformers/tree/v4.21.0/examples">v4.21.0</a></li> <li><a href="https://github.com/huggingface/transformers/tree/v4.20.1/examples">v4.20.1</a></li> <li><a href="https://github.com/huggingface/transformers/tree/v4.19.4/examples">v4.19.4</a></li> <li><a href="https://github.com/huggingface/transformers/tree/v4.18.0/examples">v4.18.0</a></li> <li><a href="https://github.com/huggingface/transformers/tree/v4.17.0/examples">v4.17.0</a></li> <li><a href="https://github.com/huggingface/transformers/tree/v4.16.2/examples">v4.16.2</a></li> <li><a href="https://github.com/huggingface/transformers/tree/v4.15.0/examples">v4.15.0</a></li> <li><a href="https://github.com/huggingface/transformers/tree/v4.14.1/examples">v4.14.1</a></li> <li><a href="https://github.com/huggingface/transformers/tree/v4.13.0/examples">v4.13.0</a></li> <li><a href="https://github.com/huggingface/transformers/tree/v4.12.5/examples">v4.12.5</a></li> <li><a href="https://github.com/huggingface/transformers/tree/v4.11.3/examples">v4.11.3</a></li> <li><a href="https://github.com/huggingface/transformers/tree/v4.10.3/examples">v4.10.3</a></li> <li><a href="https://github.com/huggingface/transformers/tree/v4.9.2/examples">v4.9.2</a></li> <li><a href="https://github.com/huggingface/transformers/tree/v4.8.2/examples">v4.8.2</a></li> <li><a href="https://github.com/huggingface/transformers/tree/v4.7.0/examples">v4.7.0</a></li> <li><a href="https://github.com/huggingface/transformers/tree/v4.6.1/examples">v4.6.1</a></li> <li><a href="https://github.com/huggingface/transformers/tree/v4.5.1/examples">v4.5.1</a></li> <li><a href="https://github.com/huggingface/transformers/tree/v4.4.2/examples">v4.4.2</a></li> <li><a href="https://github.com/huggingface/transformers/tree/v4.3.3/examples">v4.3.3</a></li> <li><a href="https://github.com/huggingface/transformers/tree/v4.2.2/examples">v4.2.2</a></li> <li><a href="https://github.com/huggingface/transformers/tree/v4.1.1/examples">v4.1.1</a></li> <li><a href="https://github.com/huggingface/transformers/tree/v4.0.1/examples">v4.0.1</a></li> <li><a href="https://github.com/huggingface/transformers/tree/v3.5.1/examples">v3.5.1</a></li> <li><a href="https://github.com/huggingface/transformers/tree/v3.4.0/examples">v3.4.0</a></li> <li><a href="https://github.com/huggingface/transformers/tree/v3.3.1/examples">v3.3.1</a></li> <li><a href="https://github.com/huggingface/transformers/tree/v3.2.0/examples">v3.2.0</a></li> <li><a href="https://github.com/huggingface/transformers/tree/v3.1.0/examples">v3.1.0</a></li> <li><a href="https://github.com/huggingface/transformers/tree/v3.0.2/examples">v3.0.2</a></li> <li><a href="https://github.com/huggingface/transformers/tree/v2.11.0/examples">v2.11.0</a></li> <li><a href="https://github.com/huggingface/transformers/tree/v2.10.0/examples">v2.10.0</a></li> <li><a href="https://github.com/huggingface/transformers/tree/v2.9.1/examples">v2.9.1</a></li> <li><a href="https://github.com/huggingface/transformers/tree/v2.8.0/examples">v2.8.0</a></li> <li><a href="https://github.com/huggingface/transformers/tree/v2.7.0/examples">v2.7.0</a></li> <li><a href="https://github.com/huggingface/transformers/tree/v2.6.0/examples">v2.6.0</a></li> <li><a href="https://github.com/huggingface/transformers/tree/v2.5.1/examples">v2.5.1</a></li> <li><a href="https://github.com/huggingface/transformers/tree/v2.4.0/examples">v2.4.0</a></li> <li><a href="https://github.com/huggingface/transformers/tree/v2.3.0/examples">v2.3.0</a></li> <li><a href="https://github.com/huggingface/transformers/tree/v2.2.0/examples">v2.2.0</a></li> <li><a href="https://github.com/huggingface/transformers/tree/v2.1.0/examples">v2.1.1</a></li> <li><a href="https://github.com/huggingface/transformers/tree/v2.0.0/examples">v2.0.0</a></li> <li><a href="https://github.com/huggingface/transformers/tree/v1.2.0/examples">v1.2.0</a></li> <li><a href="https://github.com/huggingface/transformers/tree/v1.1.0/examples">v1.1.0</a></li> <li><a href="https://github.com/huggingface/transformers/tree/v1.0.0/examples">v1.0.0</a></li> </ul> </details> Alternatively, you can switch your cloned 🤗 Transformers to a specific version (for instance with v3.5.1) with ```bash git checkout tags/v3.5.1 ``` and run the example command as usual afterward. ## Running the Examples on Remote Hardware with Auto-Setup [run_on_remote.py](./run_on_remote.py) is a script that launches any example on remote self-hosted hardware, with automatic hardware and environment setup. It uses [Runhouse](https://github.com/run-house/runhouse) to launch on self-hosted hardware (e.g. in your own cloud account or on-premise cluster) but there are other options for running remotely as well. You can easily customize the example used, command line arguments, dependencies, and type of compute hardware, and then run the script to automatically launch the example. You can refer to [hardware setup](https://runhouse-docs.readthedocs-hosted.com/en/latest/api/python/cluster.html#hardware-setup) for more information about hardware and dependency setup with Runhouse, or this [Colab tutorial](https://colab.research.google.com/drive/1sh_aNQzJX5BKAdNeXthTNGxKz7sM9VPc) for a more in-depth walkthrough. You can run the script with the following commands: ```bash # First install runhouse: pip install runhouse # For an on-demand V100 with whichever cloud provider you have configured: python run_on_remote.py \ --example pytorch/text-generation/run_generation.py \ --model_type=openai-community/gpt2 \ --model_name_or_path=openai-community/gpt2 \ --prompt "I am a language model and" # For byo (bring your own) cluster: python run_on_remote.py --host <cluster_ip> --user <ssh_user> --key_path <ssh_key_path> \ --example <example> <args> # For on-demand instances python run_on_remote.py --instance <instance> --provider <provider> \ --example <example> <args> ``` You can also adapt the script to your own needs.

transformers/examples/README.md/0

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#!/usr/bin/env python # coding=utf-8 # Copyright 2021 The HuggingFace Team All rights reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. """ Fine-tuning the library models for question answering. """ # You can also adapt this script on your own question answering task. Pointers for this are left as comments. import json import logging import math import os import random import sys import time import warnings from dataclasses import asdict, dataclass, field from enum import Enum from pathlib import Path from typing import Any, Callable, Dict, Optional, Tuple import datasets import evaluate import jax import jax.numpy as jnp import numpy as np import optax from datasets import load_dataset from flax import struct, traverse_util from flax.jax_utils import pad_shard_unpad, replicate, unreplicate from flax.training import train_state from flax.training.common_utils import get_metrics, onehot, shard from huggingface_hub import Repository, create_repo from tqdm import tqdm from utils_qa import postprocess_qa_predictions import transformers from transformers import ( AutoConfig, AutoTokenizer, EvalPrediction, FlaxAutoModelForQuestionAnswering, HfArgumentParser, PreTrainedTokenizerFast, is_tensorboard_available, ) from transformers.utils import check_min_version, send_example_telemetry logger = logging.getLogger(__name__) # Will error if the minimal version of Transformers is not installed. Remove at your own risks. check_min_version("4.39.0.dev0") Array = Any Dataset = datasets.arrow_dataset.Dataset PRNGKey = Any # region Arguments @dataclass class TrainingArguments: output_dir: str = field( metadata={"help": "The output directory where the model predictions and checkpoints will be written."}, ) overwrite_output_dir: bool = field( default=False, metadata={ "help": ( "Overwrite the content of the output directory. " "Use this to continue training if output_dir points to a checkpoint directory." ) }, ) do_train: bool = field(default=False, metadata={"help": "Whether to run training."}) do_eval: bool = field(default=False, metadata={"help": "Whether to run eval on the dev set."}) do_predict: bool = field(default=False, metadata={"help": "Whether to run predictions on the test set."}) per_device_train_batch_size: int = field( default=8, metadata={"help": "Batch size per GPU/TPU core/CPU for training."} ) per_device_eval_batch_size: int = field( default=8, metadata={"help": "Batch size per GPU/TPU core/CPU for evaluation."} ) learning_rate: float = field(default=5e-5, metadata={"help": "The initial learning rate for AdamW."}) weight_decay: float = field(default=0.0, metadata={"help": "Weight decay for AdamW if we apply some."}) adam_beta1: float = field(default=0.9, metadata={"help": "Beta1 for AdamW optimizer"}) adam_beta2: float = field(default=0.999, metadata={"help": "Beta2 for AdamW optimizer"}) adam_epsilon: float = field(default=1e-8, metadata={"help": "Epsilon for AdamW optimizer."}) adafactor: bool = field(default=False, metadata={"help": "Whether or not to replace AdamW by Adafactor."}) num_train_epochs: float = field(default=3.0, metadata={"help": "Total number of training epochs to perform."}) warmup_steps: int = field(default=0, metadata={"help": "Linear warmup over warmup_steps."}) logging_steps: int = field(default=500, metadata={"help": "Log every X updates steps."}) save_steps: int = field(default=500, metadata={"help": "Save checkpoint every X updates steps."}) eval_steps: int = field(default=None, metadata={"help": "Run an evaluation every X steps."}) seed: int = field(default=42, metadata={"help": "Random seed that will be set at the beginning of training."}) push_to_hub: bool = field( default=False, metadata={"help": "Whether or not to upload the trained model to the model hub after training."} ) hub_model_id: str = field( default=None, metadata={"help": "The name of the repository to keep in sync with the local `output_dir`."} ) hub_token: str = field(default=None, metadata={"help": "The token to use to push to the Model Hub."}) def __post_init__(self): if self.output_dir is not None: self.output_dir = os.path.expanduser(self.output_dir) def to_dict(self): """ Serializes this instance while replace `Enum` by their values (for JSON serialization support). It obfuscates the token values by removing their value. """ d = asdict(self) for k, v in d.items(): if isinstance(v, Enum): d[k] = v.value if isinstance(v, list) and len(v) > 0 and isinstance(v[0], Enum): d[k] = [x.value for x in v] if k.endswith("_token"): d[k] = f"<{k.upper()}>" return d @dataclass class ModelArguments: """ Arguments pertaining to which model/config/tokenizer we are going to fine-tune from. """ model_name_or_path: str = field( metadata={"help": "Path to pretrained model or model identifier from huggingface.co/models"} ) config_name: Optional[str] = field( default=None, metadata={"help": "Pretrained config name or path if not the same as model_name"} ) tokenizer_name: Optional[str] = field( default=None, metadata={"help": "Pretrained tokenizer name or path if not the same as model_name"} ) cache_dir: Optional[str] = field( default=None, metadata={"help": "Path to directory to store the pretrained models downloaded from huggingface.co"}, ) model_revision: str = field( default="main", metadata={"help": "The specific model version to use (can be a branch name, tag name or commit id)."}, ) token: str = field( default=None, metadata={ "help": ( "The token to use as HTTP bearer authorization for remote files. If not specified, will use the token " "generated when running `huggingface-cli login` (stored in `~/.huggingface`)." ) }, ) use_auth_token: bool = field( default=None, metadata={ "help": "The `use_auth_token` argument is deprecated and will be removed in v4.34. Please use `token` instead." }, ) trust_remote_code: bool = field( default=False, metadata={ "help": ( "Whether or not to allow for custom models defined on the Hub in their own modeling files. This option " "should only be set to `True` for repositories you trust and in which you have read the code, as it will " "execute code present on the Hub on your local machine." ) }, ) dtype: Optional[str] = field( default="float32", metadata={ "help": ( "Floating-point format in which the model weights should be initialized and trained. Choose one of" " `[float32, float16, bfloat16]`." ) }, ) @dataclass class DataTrainingArguments: """ Arguments pertaining to what data we are going to input our model for training and eval. """ dataset_name: Optional[str] = field( default=None, metadata={"help": "The name of the dataset to use (via the datasets library)."} ) dataset_config_name: Optional[str] = field( default=None, metadata={"help": "The configuration name of the dataset to use (via the datasets library)."} ) train_file: Optional[str] = field(default=None, metadata={"help": "The input training data file (a text file)."}) validation_file: Optional[str] = field( default=None, metadata={"help": "An optional input evaluation data file to evaluate the perplexity on (a text file)."}, ) test_file: Optional[str] = field( default=None, metadata={"help": "An optional input test data file to evaluate the perplexity on (a text file)."}, ) overwrite_cache: bool = field( default=False, metadata={"help": "Overwrite the cached training and evaluation sets"} ) preprocessing_num_workers: Optional[int] = field( default=None, metadata={"help": "The number of processes to use for the preprocessing."}, ) max_seq_length: int = field( default=384, metadata={ "help": ( "The maximum total input sequence length after tokenization. Sequences longer " "than this will be truncated, sequences shorter will be padded." ) }, ) pad_to_max_length: bool = field( default=False, metadata={ "help": ( "Whether to pad all samples to `max_seq_length`. If False, will pad the samples dynamically when" " batching to the maximum length in the batch (which can be faster on GPU but will be slower on TPU)." ) }, ) max_train_samples: Optional[int] = field( default=None, metadata={ "help": ( "For debugging purposes or quicker training, truncate the number of training examples to this " "value if set." ) }, ) max_eval_samples: Optional[int] = field( default=None, metadata={ "help": ( "For debugging purposes or quicker training, truncate the number of evaluation examples to this " "value if set." ) }, ) max_predict_samples: Optional[int] = field( default=None, metadata={ "help": ( "For debugging purposes or quicker training, truncate the number of prediction examples to this " "value if set." ) }, ) version_2_with_negative: bool = field( default=False, metadata={"help": "If true, some of the examples do not have an answer."} ) null_score_diff_threshold: float = field( default=0.0, metadata={ "help": ( "The threshold used to select the null answer: if the best answer has a score that is less than " "the score of the null answer minus this threshold, the null answer is selected for this example. " "Only useful when `version_2_with_negative=True`." ) }, ) doc_stride: int = field( default=128, metadata={"help": "When splitting up a long document into chunks, how much stride to take between chunks."}, ) n_best_size: int = field( default=20, metadata={"help": "The total number of n-best predictions to generate when looking for an answer."}, ) max_answer_length: int = field( default=30, metadata={ "help": ( "The maximum length of an answer that can be generated. This is needed because the start " "and end predictions are not conditioned on one another." ) }, ) def __post_init__(self): if ( self.dataset_name is None and self.train_file is None and self.validation_file is None and self.test_file is None ): raise ValueError("Need either a dataset name or a training/validation file/test_file.") else: if self.train_file is not None: extension = self.train_file.split(".")[-1] assert extension in ["csv", "json"], "`train_file` should be a csv or a json file." if self.validation_file is not None: extension = self.validation_file.split(".")[-1] assert extension in ["csv", "json"], "`validation_file` should be a csv or a json file." if self.test_file is not None: extension = self.test_file.split(".")[-1] assert extension in ["csv", "json"], "`test_file` should be a csv or a json file." # endregion # region Create a train state def create_train_state( model: FlaxAutoModelForQuestionAnswering, learning_rate_fn: Callable[[int], float], num_labels: int, training_args: TrainingArguments, ) -> train_state.TrainState: """Create initial training state.""" class TrainState(train_state.TrainState): """Train state with an Optax optimizer. The two functions below differ depending on whether the task is classification or regression. Args: logits_fn: Applied to last layer to obtain the logits. loss_fn: Function to compute the loss. """ logits_fn: Callable = struct.field(pytree_node=False) loss_fn: Callable = struct.field(pytree_node=False) # We use Optax's "masking" functionality to not apply weight decay # to bias and LayerNorm scale parameters. decay_mask_fn returns a # mask boolean with the same structure as the parameters. # The mask is True for parameters that should be decayed. def decay_mask_fn(params): flat_params = traverse_util.flatten_dict(params) # find out all LayerNorm parameters layer_norm_candidates = ["layernorm", "layer_norm", "ln"] layer_norm_named_params = { layer[-2:] for layer_norm_name in layer_norm_candidates for layer in flat_params.keys() if layer_norm_name in "".join(layer).lower() } flat_mask = {path: (path[-1] != "bias" and path[-2:] not in layer_norm_named_params) for path in flat_params} return traverse_util.unflatten_dict(flat_mask) tx = optax.adamw( learning_rate=learning_rate_fn, b1=training_args.adam_beta1, b2=training_args.adam_beta2, eps=training_args.adam_epsilon, weight_decay=training_args.weight_decay, mask=decay_mask_fn, ) def cross_entropy_loss(logits, labels): start_loss = optax.softmax_cross_entropy(logits[0], onehot(labels[0], num_classes=num_labels)) end_loss = optax.softmax_cross_entropy(logits[1], onehot(labels[1], num_classes=num_labels)) xentropy = (start_loss + end_loss) / 2.0 return jnp.mean(xentropy) return TrainState.create( apply_fn=model.__call__, params=model.params, tx=tx, logits_fn=lambda logits: logits, loss_fn=cross_entropy_loss, ) # endregion # region Create learning rate function def create_learning_rate_fn( train_ds_size: int, train_batch_size: int, num_train_epochs: int, num_warmup_steps: int, learning_rate: float ) -> Callable[[int], jnp.ndarray]: """Returns a linear warmup, linear_decay learning rate function.""" steps_per_epoch = train_ds_size // train_batch_size num_train_steps = steps_per_epoch * num_train_epochs warmup_fn = optax.linear_schedule(init_value=0.0, end_value=learning_rate, transition_steps=num_warmup_steps) decay_fn = optax.linear_schedule( init_value=learning_rate, end_value=0, transition_steps=num_train_steps - num_warmup_steps ) schedule_fn = optax.join_schedules(schedules=[warmup_fn, decay_fn], boundaries=[num_warmup_steps]) return schedule_fn # endregion # region train data iterator def train_data_collator(rng: PRNGKey, dataset: Dataset, batch_size: int): """Returns shuffled batches of size `batch_size` from truncated `train dataset`, sharded over all local devices.""" steps_per_epoch = len(dataset) // batch_size perms = jax.random.permutation(rng, len(dataset)) perms = perms[: steps_per_epoch * batch_size] # Skip incomplete batch. perms = perms.reshape((steps_per_epoch, batch_size)) for perm in perms: batch = dataset[perm] batch = {k: np.array(v) for k, v in batch.items()} batch = shard(batch) yield batch # endregion # region eval data iterator def eval_data_collator(dataset: Dataset, batch_size: int): """Returns batches of size `batch_size` from `eval dataset`. Sharding handled by `pad_shard_unpad` in the eval loop.""" batch_idx = np.arange(len(dataset)) steps_per_epoch = math.ceil(len(dataset) / batch_size) batch_idx = np.array_split(batch_idx, steps_per_epoch) for idx in batch_idx: batch = dataset[idx] batch = {k: np.array(v) for k, v in batch.items()} yield batch # endregion def main(): # region Argument parsing # See all possible arguments in src/transformers/training_args.py # or by passing the --help flag to this script. # We now keep distinct sets of args, for a cleaner separation of concerns. parser = HfArgumentParser((ModelArguments, DataTrainingArguments, TrainingArguments)) if len(sys.argv) == 2 and sys.argv[1].endswith(".json"): # If we pass only one argument to the script and it's the path to a json file, # let's parse it to get our arguments. model_args, data_args, training_args = parser.parse_json_file(json_file=os.path.abspath(sys.argv[1])) else: model_args, data_args, training_args = parser.parse_args_into_dataclasses() if model_args.use_auth_token is not None: warnings.warn( "The `use_auth_token` argument is deprecated and will be removed in v4.34. Please use `token` instead.", FutureWarning, ) if model_args.token is not None: raise ValueError("`token` and `use_auth_token` are both specified. Please set only the argument `token`.") model_args.token = model_args.use_auth_token # Sending telemetry. Tracking the example usage helps us better allocate resources to maintain them. The # information sent is the one passed as arguments along with your Python/PyTorch versions. send_example_telemetry("run_qa", model_args, data_args, framework="flax") # endregion # region Logging # Make one log on every process with the configuration for debugging. logging.basicConfig( format="%(asctime)s - %(levelname)s - %(name)s - %(message)s", datefmt="%m/%d/%Y %H:%M:%S", level=logging.INFO, ) # Setup logging, we only want one process per machine to log things on the screen. logger.setLevel(logging.INFO if jax.process_index() == 0 else logging.ERROR) if jax.process_index() == 0: datasets.utils.logging.set_verbosity_warning() transformers.utils.logging.set_verbosity_info() else: datasets.utils.logging.set_verbosity_error() transformers.utils.logging.set_verbosity_error() # endregion # Handle the repository creation if training_args.push_to_hub: # Retrieve of infer repo_name repo_name = training_args.hub_model_id if repo_name is None: repo_name = Path(training_args.output_dir).absolute().name # Create repo and retrieve repo_id repo_id = create_repo(repo_name, exist_ok=True, token=training_args.hub_token).repo_id # Clone repo locally repo = Repository(training_args.output_dir, clone_from=repo_id, token=training_args.hub_token) # region Load Data # Get the datasets: you can either provide your own CSV/JSON/TXT training and evaluation files (see below) # or just provide the name of one of the public datasets available on the hub at https://huggingface.co/datasets/ # (the dataset will be downloaded automatically from the datasets Hub). # # For CSV/JSON files, this script will use the column called 'text' or the first column if no column called # 'text' is found. You can easily tweak this behavior (see below). # # In distributed training, the load_dataset function guarantee that only one local process can concurrently # download the dataset. if data_args.dataset_name is not None: # Downloading and loading a dataset from the hub. raw_datasets = load_dataset( data_args.dataset_name, data_args.dataset_config_name, cache_dir=model_args.cache_dir, token=model_args.token, ) else: # Loading the dataset from local csv or json file. data_files = {} if data_args.train_file is not None: data_files["train"] = data_args.train_file extension = data_args.train_file.split(".")[-1] if data_args.validation_file is not None: data_files["validation"] = data_args.validation_file extension = data_args.validation_file.split(".")[-1] if data_args.test_file is not None: data_files["test"] = data_args.test_file extension = data_args.test_file.split(".")[-1] raw_datasets = load_dataset( extension, data_files=data_files, field="data", cache_dir=model_args.cache_dir, token=model_args.token, ) # See more about loading any type of standard or custom dataset (from files, python dict, pandas DataFrame, etc) at # https://huggingface.co/docs/datasets/loading_datasets. # endregion # region Load pretrained model and tokenizer # # Load pretrained model and tokenizer config = AutoConfig.from_pretrained( model_args.config_name if model_args.config_name else model_args.model_name_or_path, cache_dir=model_args.cache_dir, revision=model_args.model_revision, token=model_args.token, trust_remote_code=model_args.trust_remote_code, ) tokenizer = AutoTokenizer.from_pretrained( model_args.tokenizer_name if model_args.tokenizer_name else model_args.model_name_or_path, cache_dir=model_args.cache_dir, use_fast=True, revision=model_args.model_revision, token=model_args.token, trust_remote_code=model_args.trust_remote_code, ) # endregion # region Tokenizer check: this script requires a fast tokenizer. if not isinstance(tokenizer, PreTrainedTokenizerFast): raise ValueError( "This example script only works for models that have a fast tokenizer. Checkout the big table of models at" " https://huggingface.co/transformers/index.html#supported-frameworks to find the model types that meet" " this requirement" ) # endregion # region Preprocessing the datasets # Preprocessing is slightly different for training and evaluation. if training_args.do_train: column_names = raw_datasets["train"].column_names elif training_args.do_eval: column_names = raw_datasets["validation"].column_names else: column_names = raw_datasets["test"].column_names question_column_name = "question" if "question" in column_names else column_names[0] context_column_name = "context" if "context" in column_names else column_names[1] answer_column_name = "answers" if "answers" in column_names else column_names[2] # Padding side determines if we do (question|context) or (context|question). pad_on_right = tokenizer.padding_side == "right" if data_args.max_seq_length > tokenizer.model_max_length: logger.warning( f"The max_seq_length passed ({data_args.max_seq_length}) is larger than the maximum length for the " f"model ({tokenizer.model_max_length}). Using max_seq_length={tokenizer.model_max_length}." ) max_seq_length = min(data_args.max_seq_length, tokenizer.model_max_length) # Training preprocessing def prepare_train_features(examples): # Some of the questions have lots of whitespace on the left, which is not useful and will make the # truncation of the context fail (the tokenized question will take a lots of space). So we remove that # left whitespace examples[question_column_name] = [q.lstrip() for q in examples[question_column_name]] # Tokenize our examples with truncation and maybe padding, but keep the overflows using a stride. This results # in one example possible giving several features when a context is long, each of those features having a # context that overlaps a bit the context of the previous feature. tokenized_examples = tokenizer( examples[question_column_name if pad_on_right else context_column_name], examples[context_column_name if pad_on_right else question_column_name], truncation="only_second" if pad_on_right else "only_first", max_length=max_seq_length, stride=data_args.doc_stride, return_overflowing_tokens=True, return_offsets_mapping=True, padding="max_length", ) # Since one example might give us several features if it has a long context, we need a map from a feature to # its corresponding example. This key gives us just that. sample_mapping = tokenized_examples.pop("overflow_to_sample_mapping") # The offset mappings will give us a map from token to character position in the original context. This will # help us compute the start_positions and end_positions. offset_mapping = tokenized_examples.pop("offset_mapping") # Let's label those examples! tokenized_examples["start_positions"] = [] tokenized_examples["end_positions"] = [] for i, offsets in enumerate(offset_mapping): # We will label impossible answers with the index of the CLS token. input_ids = tokenized_examples["input_ids"][i] cls_index = input_ids.index(tokenizer.cls_token_id) # Grab the sequence corresponding to that example (to know what is the context and what is the question). sequence_ids = tokenized_examples.sequence_ids(i) # One example can give several spans, this is the index of the example containing this span of text. sample_index = sample_mapping[i] answers = examples[answer_column_name][sample_index] # If no answers are given, set the cls_index as answer. if len(answers["answer_start"]) == 0: tokenized_examples["start_positions"].append(cls_index) tokenized_examples["end_positions"].append(cls_index) else: # Start/end character index of the answer in the text. start_char = answers["answer_start"][0] end_char = start_char + len(answers["text"][0]) # Start token index of the current span in the text. token_start_index = 0 while sequence_ids[token_start_index] != (1 if pad_on_right else 0): token_start_index += 1 # End token index of the current span in the text. token_end_index = len(input_ids) - 1 while sequence_ids[token_end_index] != (1 if pad_on_right else 0): token_end_index -= 1 # Detect if the answer is out of the span (in which case this feature is labeled with the CLS index). if not (offsets[token_start_index][0] <= start_char and offsets[token_end_index][1] >= end_char): tokenized_examples["start_positions"].append(cls_index) tokenized_examples["end_positions"].append(cls_index) else: # Otherwise move the token_start_index and token_end_index to the two ends of the answer. # Note: we could go after the last offset if the answer is the last word (edge case). while token_start_index < len(offsets) and offsets[token_start_index][0] <= start_char: token_start_index += 1 tokenized_examples["start_positions"].append(token_start_index - 1) while offsets[token_end_index][1] >= end_char: token_end_index -= 1 tokenized_examples["end_positions"].append(token_end_index + 1) return tokenized_examples processed_raw_datasets = {} if training_args.do_train: if "train" not in raw_datasets: raise ValueError("--do_train requires a train dataset") train_dataset = raw_datasets["train"] if data_args.max_train_samples is not None: # We will select sample from whole data if argument is specified max_train_samples = min(len(train_dataset), data_args.max_train_samples) train_dataset = train_dataset.select(range(max_train_samples)) # Create train feature from dataset train_dataset = train_dataset.map( prepare_train_features, batched=True, num_proc=data_args.preprocessing_num_workers, remove_columns=column_names, load_from_cache_file=not data_args.overwrite_cache, ) if data_args.max_train_samples is not None: # Number of samples might increase during Feature Creation, We select only specified max samples max_train_samples = min(len(train_dataset), data_args.max_train_samples) train_dataset = train_dataset.select(range(max_train_samples)) processed_raw_datasets["train"] = train_dataset # Validation preprocessing def prepare_validation_features(examples): # Some of the questions have lots of whitespace on the left, which is not useful and will make the # truncation of the context fail (the tokenized question will take a lots of space). So we remove that # left whitespace examples[question_column_name] = [q.lstrip() for q in examples[question_column_name]] # Tokenize our examples with truncation and maybe padding, but keep the overflows using a stride. This results # in one example possible giving several features when a context is long, each of those features having a # context that overlaps a bit the context of the previous feature. tokenized_examples = tokenizer( examples[question_column_name if pad_on_right else context_column_name], examples[context_column_name if pad_on_right else question_column_name], truncation="only_second" if pad_on_right else "only_first", max_length=max_seq_length, stride=data_args.doc_stride, return_overflowing_tokens=True, return_offsets_mapping=True, padding="max_length", ) # Since one example might give us several features if it has a long context, we need a map from a feature to # its corresponding example. This key gives us just that. sample_mapping = tokenized_examples.pop("overflow_to_sample_mapping") # For evaluation, we will need to convert our predictions to substrings of the context, so we keep the # corresponding example_id and we will store the offset mappings. tokenized_examples["example_id"] = [] for i in range(len(tokenized_examples["input_ids"])): # Grab the sequence corresponding to that example (to know what is the context and what is the question). sequence_ids = tokenized_examples.sequence_ids(i) context_index = 1 if pad_on_right else 0 # One example can give several spans, this is the index of the example containing this span of text. sample_index = sample_mapping[i] tokenized_examples["example_id"].append(examples["id"][sample_index]) # Set to None the offset_mapping that are not part of the context so it's easy to determine if a token # position is part of the context or not. tokenized_examples["offset_mapping"][i] = [ (o if sequence_ids[k] == context_index else None) for k, o in enumerate(tokenized_examples["offset_mapping"][i]) ] return tokenized_examples if training_args.do_eval: if "validation" not in raw_datasets: raise ValueError("--do_eval requires a validation dataset") eval_examples = raw_datasets["validation"] if data_args.max_eval_samples is not None: # We will select sample from whole data max_eval_samples = min(len(eval_examples), data_args.max_eval_samples) eval_examples = eval_examples.select(range(max_eval_samples)) # Validation Feature Creation eval_dataset = eval_examples.map( prepare_validation_features, batched=True, num_proc=data_args.preprocessing_num_workers, remove_columns=column_names, load_from_cache_file=not data_args.overwrite_cache, ) if data_args.max_eval_samples is not None: # During Feature creation dataset samples might increase, we will select required samples again max_eval_samples = min(len(eval_dataset), data_args.max_eval_samples) eval_dataset = eval_dataset.select(range(max_eval_samples)) processed_raw_datasets["validation"] = eval_dataset if training_args.do_predict: if "test" not in raw_datasets: raise ValueError("--do_predict requires a test dataset") predict_examples = raw_datasets["test"] if data_args.max_predict_samples is not None: # We will select sample from whole data predict_examples = predict_examples.select(range(data_args.max_predict_samples)) # Predict Feature Creation predict_dataset = predict_examples.map( prepare_validation_features, batched=True, num_proc=data_args.preprocessing_num_workers, remove_columns=column_names, load_from_cache_file=not data_args.overwrite_cache, ) if data_args.max_predict_samples is not None: # During Feature creation dataset samples might increase, we will select required samples again max_predict_samples = min(len(predict_dataset), data_args.max_predict_samples) predict_dataset = predict_dataset.select(range(max_predict_samples)) processed_raw_datasets["test"] = predict_dataset # endregion # region Metrics and Post-processing: def post_processing_function(examples, features, predictions, stage="eval"): # Post-processing: we match the start logits and end logits to answers in the original context. predictions = postprocess_qa_predictions( examples=examples, features=features, predictions=predictions, version_2_with_negative=data_args.version_2_with_negative, n_best_size=data_args.n_best_size, max_answer_length=data_args.max_answer_length, null_score_diff_threshold=data_args.null_score_diff_threshold, output_dir=training_args.output_dir, prefix=stage, ) # Format the result to the format the metric expects. if data_args.version_2_with_negative: formatted_predictions = [ {"id": k, "prediction_text": v, "no_answer_probability": 0.0} for k, v in predictions.items() ] else: formatted_predictions = [{"id": k, "prediction_text": v} for k, v in predictions.items()] references = [{"id": ex["id"], "answers": ex[answer_column_name]} for ex in examples] return EvalPrediction(predictions=formatted_predictions, label_ids=references) metric = evaluate.load( "squad_v2" if data_args.version_2_with_negative else "squad", cache_dir=model_args.cache_dir ) def compute_metrics(p: EvalPrediction): return metric.compute(predictions=p.predictions, references=p.label_ids) # Create and fill numpy array of size len_of_validation_data * max_length_of_output_tensor def create_and_fill_np_array(start_or_end_logits, dataset, max_len): """ Create and fill numpy array of size len_of_validation_data * max_length_of_output_tensor Args: start_or_end_logits(:obj:`tensor`): This is the output predictions of the model. We can only enter either start or end logits. eval_dataset: Evaluation dataset max_len(:obj:`int`): The maximum length of the output tensor. ( See the model.eval() part for more details ) """ step = 0 # create a numpy array and fill it with -100. logits_concat = np.full((len(dataset), max_len), -100, dtype=np.float64) # Now since we have create an array now we will populate it with the outputs of the model. for i, output_logit in enumerate(start_or_end_logits): # populate columns # We have to fill it such that we have to take the whole tensor and replace it on the newly created array # And after every iteration we have to change the step batch_size = output_logit.shape[0] cols = output_logit.shape[1] if step + batch_size < len(dataset): logits_concat[step : step + batch_size, :cols] = output_logit else: logits_concat[step:, :cols] = output_logit[: len(dataset) - step] step += batch_size return logits_concat # endregion # region Training steps and logging init train_dataset = processed_raw_datasets["train"] eval_dataset = processed_raw_datasets["validation"] # Log a few random samples from the training set: for index in random.sample(range(len(train_dataset)), 3): logger.info(f"Sample {index} of the training set: {train_dataset[index]}.") # Define a summary writer has_tensorboard = is_tensorboard_available() if has_tensorboard and jax.process_index() == 0: try: from flax.metrics.tensorboard import SummaryWriter summary_writer = SummaryWriter(training_args.output_dir) summary_writer.hparams({**training_args.to_dict(), **vars(model_args), **vars(data_args)}) except ImportError as ie: has_tensorboard = False logger.warning( f"Unable to display metrics through TensorBoard because some package are not installed: {ie}" ) else: logger.warning( "Unable to display metrics through TensorBoard because the package is not installed: " "Please run pip install tensorboard to enable." ) def write_train_metric(summary_writer, train_metrics, train_time, step): summary_writer.scalar("train_time", train_time, step) train_metrics = get_metrics(train_metrics) for key, vals in train_metrics.items(): tag = f"train_{key}" for i, val in enumerate(vals): summary_writer.scalar(tag, val, step - len(vals) + i + 1) def write_eval_metric(summary_writer, eval_metrics, step): for metric_name, value in eval_metrics.items(): summary_writer.scalar(f"eval_{metric_name}", value, step) num_epochs = int(training_args.num_train_epochs) rng = jax.random.PRNGKey(training_args.seed) dropout_rngs = jax.random.split(rng, jax.local_device_count()) train_batch_size = int(training_args.per_device_train_batch_size) * jax.local_device_count() per_device_eval_batch_size = int(training_args.per_device_eval_batch_size) eval_batch_size = per_device_eval_batch_size * jax.local_device_count() # endregion # region Load model model = FlaxAutoModelForQuestionAnswering.from_pretrained( model_args.model_name_or_path, config=config, cache_dir=model_args.cache_dir, revision=model_args.model_revision, token=model_args.token, trust_remote_code=model_args.trust_remote_code, seed=training_args.seed, dtype=getattr(jnp, model_args.dtype), ) learning_rate_fn = create_learning_rate_fn( len(train_dataset), train_batch_size, training_args.num_train_epochs, training_args.warmup_steps, training_args.learning_rate, ) state = create_train_state(model, learning_rate_fn, num_labels=max_seq_length, training_args=training_args) # endregion # region Define train step functions def train_step( state: train_state.TrainState, batch: Dict[str, Array], dropout_rng: PRNGKey ) -> Tuple[train_state.TrainState, float]: """Trains model with an optimizer (both in `state`) on `batch`, returning a pair `(new_state, loss)`.""" dropout_rng, new_dropout_rng = jax.random.split(dropout_rng) start_positions = batch.pop("start_positions") end_positions = batch.pop("end_positions") targets = (start_positions, end_positions) def loss_fn(params): logits = state.apply_fn(**batch, params=params, dropout_rng=dropout_rng, train=True) loss = state.loss_fn(logits, targets) return loss grad_fn = jax.value_and_grad(loss_fn) loss, grad = grad_fn(state.params) grad = jax.lax.pmean(grad, "batch") new_state = state.apply_gradients(grads=grad) metrics = jax.lax.pmean({"loss": loss, "learning_rate": learning_rate_fn(state.step)}, axis_name="batch") return new_state, metrics, new_dropout_rng p_train_step = jax.pmap(train_step, axis_name="batch", donate_argnums=(0,)) # endregion # region Define eval step functions def eval_step(state, batch): logits = state.apply_fn(**batch, params=state.params, train=False) return state.logits_fn(logits) p_eval_step = jax.pmap(eval_step, axis_name="batch") # endregion # region Define train and eval loop logger.info(f"===== Starting training ({num_epochs} epochs) =====") train_time = 0 # make sure weights are replicated on each device state = replicate(state) train_time = 0 step_per_epoch = len(train_dataset) // train_batch_size total_steps = step_per_epoch * num_epochs epochs = tqdm(range(num_epochs), desc=f"Epoch ... (1/{num_epochs})", position=0) for epoch in epochs: train_start = time.time() train_metrics = [] # Create sampling rng rng, input_rng = jax.random.split(rng) # train for step, batch in enumerate( tqdm( train_data_collator(input_rng, train_dataset, train_batch_size), total=step_per_epoch, desc="Training...", position=1, ), 1, ): state, train_metric, dropout_rngs = p_train_step(state, batch, dropout_rngs) train_metrics.append(train_metric) cur_step = epoch * step_per_epoch + step if cur_step % training_args.logging_steps == 0 and cur_step > 0: # Save metrics train_metric = unreplicate(train_metric) train_time += time.time() - train_start if has_tensorboard and jax.process_index() == 0: write_train_metric(summary_writer, train_metrics, train_time, cur_step) epochs.write( f"Step... ({cur_step}/{total_steps} | Training Loss: {train_metric['loss']}, Learning Rate:" f" {train_metric['learning_rate']})" ) train_metrics = [] if ( training_args.do_eval and (cur_step % training_args.eval_steps == 0 or cur_step % step_per_epoch == 0) and cur_step > 0 ): eval_metrics = {} all_start_logits = [] all_end_logits = [] # evaluate for batch in tqdm( eval_data_collator(eval_dataset, eval_batch_size), total=math.ceil(len(eval_dataset) / eval_batch_size), desc="Evaluating ...", position=2, ): _ = batch.pop("example_id") _ = batch.pop("offset_mapping") predictions = pad_shard_unpad(p_eval_step)( state, batch, min_device_batch=per_device_eval_batch_size ) start_logits = np.array(predictions[0]) end_logits = np.array(predictions[1]) all_start_logits.append(start_logits) all_end_logits.append(end_logits) max_len = max([x.shape[1] for x in all_start_logits]) # Get the max_length of the tensor # concatenate the numpy array start_logits_concat = create_and_fill_np_array(all_start_logits, eval_dataset, max_len) end_logits_concat = create_and_fill_np_array(all_end_logits, eval_dataset, max_len) # delete the list of numpy arrays del all_start_logits del all_end_logits outputs_numpy = (start_logits_concat, end_logits_concat) prediction = post_processing_function(eval_examples, eval_dataset, outputs_numpy) eval_metrics = compute_metrics(prediction) logger.info(f"Step... ({cur_step}/{total_steps} | Evaluation metrics: {eval_metrics})") if has_tensorboard and jax.process_index() == 0: write_eval_metric(summary_writer, eval_metrics, cur_step) if (cur_step % training_args.save_steps == 0 and cur_step > 0) or (cur_step == total_steps): # save checkpoint after each epoch and push checkpoint to the hub if jax.process_index() == 0: params = jax.device_get(unreplicate(state.params)) model.save_pretrained(training_args.output_dir, params=params) tokenizer.save_pretrained(training_args.output_dir) if training_args.push_to_hub: repo.push_to_hub(commit_message=f"Saving weights and logs of step {cur_step}", blocking=False) epochs.desc = f"Epoch ... {epoch + 1}/{num_epochs}" # endregion # Eval after training if training_args.do_eval: eval_metrics = {} all_start_logits = [] all_end_logits = [] eval_loader = eval_data_collator(eval_dataset, eval_batch_size) for batch in tqdm( eval_loader, total=math.ceil(len(eval_dataset) / eval_batch_size), desc="Evaluating ...", position=2 ): _ = batch.pop("example_id") _ = batch.pop("offset_mapping") predictions = pad_shard_unpad(p_eval_step)(state, batch, min_device_batch=per_device_eval_batch_size) start_logits = np.array(predictions[0]) end_logits = np.array(predictions[1]) all_start_logits.append(start_logits) all_end_logits.append(end_logits) max_len = max([x.shape[1] for x in all_start_logits]) # Get the max_length of the tensor # concatenate the numpy array start_logits_concat = create_and_fill_np_array(all_start_logits, eval_dataset, max_len) end_logits_concat = create_and_fill_np_array(all_end_logits, eval_dataset, max_len) # delete the list of numpy arrays del all_start_logits del all_end_logits outputs_numpy = (start_logits_concat, end_logits_concat) prediction = post_processing_function(eval_examples, eval_dataset, outputs_numpy) eval_metrics = compute_metrics(prediction) if jax.process_index() == 0: eval_metrics = {f"eval_{metric_name}": value for metric_name, value in eval_metrics.items()} path = os.path.join(training_args.output_dir, "eval_results.json") with open(path, "w") as f: json.dump(eval_metrics, f, indent=4, sort_keys=True) if __name__ == "__main__": main()

transformers/examples/flax/question-answering/run_qa.py/0

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#### Fine-tuning BERT on SQuAD1.0 with relative position embeddings The following examples show how to fine-tune BERT models with different relative position embeddings. The BERT model `google-bert/bert-base-uncased` was pretrained with default absolute position embeddings. We provide the following pretrained models which were pre-trained on the same training data (BooksCorpus and English Wikipedia) as in the BERT model training, but with different relative position embeddings. * `zhiheng-huang/bert-base-uncased-embedding-relative-key`, trained from scratch with relative embedding proposed by Shaw et al., [Self-Attention with Relative Position Representations](https://arxiv.org/abs/1803.02155) * `zhiheng-huang/bert-base-uncased-embedding-relative-key-query`, trained from scratch with relative embedding method 4 in Huang et al. [Improve Transformer Models with Better Relative Position Embeddings](https://arxiv.org/abs/2009.13658) * `zhiheng-huang/bert-large-uncased-whole-word-masking-embedding-relative-key-query`, fine-tuned from model `google-bert/bert-large-uncased-whole-word-masking` with 3 additional epochs with relative embedding method 4 in Huang et al. [Improve Transformer Models with Better Relative Position Embeddings](https://arxiv.org/abs/2009.13658) ##### Base models fine-tuning ```bash export CUDA_VISIBLE_DEVICES=0,1,2,3,4,5,6,7 torchrun --nproc_per_node=8 ./examples/question-answering/run_squad.py \ --model_name_or_path zhiheng-huang/bert-base-uncased-embedding-relative-key-query \ --dataset_name squad \ --do_train \ --do_eval \ --learning_rate 3e-5 \ --num_train_epochs 2 \ --max_seq_length 512 \ --doc_stride 128 \ --output_dir relative_squad \ --per_device_eval_batch_size=60 \ --per_device_train_batch_size=6 ``` Training with the above command leads to the following results. It boosts the BERT default from f1 score of 88.52 to 90.54. ```bash 'exact': 83.6802270577105, 'f1': 90.54772098174814 ``` The change of `max_seq_length` from 512 to 384 in the above command leads to the f1 score of 90.34. Replacing the above model `zhiheng-huang/bert-base-uncased-embedding-relative-key-query` with `zhiheng-huang/bert-base-uncased-embedding-relative-key` leads to the f1 score of 89.51. The changing of 8 gpus to one gpu training leads to the f1 score of 90.71. ##### Large models fine-tuning ```bash export CUDA_VISIBLE_DEVICES=0,1,2,3,4,5,6,7 torchrun --nproc_per_node=8 ./examples/question-answering/run_squad.py \ --model_name_or_path zhiheng-huang/bert-large-uncased-whole-word-masking-embedding-relative-key-query \ --dataset_name squad \ --do_train \ --do_eval \ --learning_rate 3e-5 \ --num_train_epochs 2 \ --max_seq_length 512 \ --doc_stride 128 \ --output_dir relative_squad \ --per_gpu_eval_batch_size=6 \ --per_gpu_train_batch_size=2 \ --gradient_accumulation_steps 3 ``` Training with the above command leads to the f1 score of 93.52, which is slightly better than the f1 score of 93.15 for `google-bert/bert-large-uncased-whole-word-masking`. #### Distributed training Here is an example using distributed training on 8 V100 GPUs and Bert Whole Word Masking uncased model to reach a F1 > 93 on SQuAD1.1: ```bash torchrun --nproc_per_node=8 ./examples/question-answering/run_squad.py \ --model_name_or_path google-bert/bert-large-uncased-whole-word-masking \ --dataset_name squad \ --do_train \ --do_eval \ --learning_rate 3e-5 \ --num_train_epochs 2 \ --max_seq_length 384 \ --doc_stride 128 \ --output_dir ./examples/models/wwm_uncased_finetuned_squad/ \ --per_device_eval_batch_size=3 \ --per_device_train_batch_size=3 \ ``` Training with the previously defined hyper-parameters yields the following results: ```bash f1 = 93.15 exact_match = 86.91 ``` This fine-tuned model is available as a checkpoint under the reference [`google-bert/bert-large-uncased-whole-word-masking-finetuned-squad`](https://huggingface.co/google-bert/bert-large-uncased-whole-word-masking-finetuned-squad). ## Results Larger batch size may improve the performance while costing more memory. ##### Results for SQuAD1.0 with the previously defined hyper-parameters: ```python { "exact": 85.45884578997162, "f1": 92.5974600601065, "total": 10570, "HasAns_exact": 85.45884578997162, "HasAns_f1": 92.59746006010651, "HasAns_total": 10570 } ``` ##### Results for SQuAD2.0 with the previously defined hyper-parameters: ```python { "exact": 80.4177545691906, "f1": 84.07154997729623, "total": 11873, "HasAns_exact": 76.73751686909581, "HasAns_f1": 84.05558584352873, "HasAns_total": 5928, "NoAns_exact": 84.0874684608915, "NoAns_f1": 84.0874684608915, "NoAns_total": 5945 } ```

transformers/examples/legacy/question-answering/README.md/0

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43

# Copyright 2020 The HuggingFace Team. All rights reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. import re from filelock import FileLock try: import nltk NLTK_AVAILABLE = True except (ImportError, ModuleNotFoundError): NLTK_AVAILABLE = False if NLTK_AVAILABLE: with FileLock(".lock") as lock: nltk.download("punkt", quiet=True) def add_newline_to_end_of_each_sentence(x: str) -> str: """This was added to get rougeLsum scores matching published rougeL scores for BART and PEGASUS.""" re.sub("<n>", "", x) # remove pegasus newline char assert NLTK_AVAILABLE, "nltk must be installed to separate newlines between sentences. (pip install nltk)" return "\n".join(nltk.sent_tokenize(x))

transformers/examples/legacy/seq2seq/sentence_splitter.py/0

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44

# Copyright 2020 The HuggingFace Team. All rights reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. python finetune_trainer.py \ --model_name_or_path=facebook/mbart-large-cc25 \ --data_dir $ENRO_DIR \ --output_dir mbart_cc25_enro --overwrite_output_dir \ --learning_rate=3e-5 \ --warmup_steps 500 \ --fp16 \ --label_smoothing 0.1 \ --adam_eps 1e-06 \ --src_lang en_XX --tgt_lang ro_RO \ --freeze_embeds \ --per_device_train_batch_size=4 --per_device_eval_batch_size=4 \ --max_source_length 128 --max_target_length 128 --val_max_target_length 128 --test_max_target_length 128\ --sortish_sampler \ --num_train_epochs 6 \ --save_steps 25000 --eval_steps 25000 --logging_steps 1000 \ --do_train --do_eval --do_predict \ --evaluation_strategy steps \ --predict_with_generate --logging_first_step \ --task translation \ "$@"

transformers/examples/legacy/seq2seq/train_mbart_cc25_enro.sh/0

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45

#!/usr/bin/env python # coding=utf-8 # Copyright 2021 The HuggingFace Inc. team. All rights reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. """ Fine-tuning the library models for causal language modeling (GPT, GPT-2, CTRL, ...) on a text file or a dataset without using HuggingFace Trainer. Here is the full list of checkpoints on the hub that can be fine-tuned by this script: https://huggingface.co/models?filter=text-generation """ # You can also adapt this script on your own causal language modeling task. Pointers for this are left as comments. import argparse import json import logging import math import os import random from itertools import chain from pathlib import Path import datasets import torch from accelerate import Accelerator, DistributedType from accelerate.logging import get_logger from accelerate.utils import set_seed from datasets import load_dataset from huggingface_hub import Repository, create_repo from torch.utils.data import DataLoader from tqdm.auto import tqdm import transformers from transformers import ( CONFIG_MAPPING, MODEL_MAPPING, AutoConfig, AutoModelForCausalLM, AutoTokenizer, SchedulerType, default_data_collator, get_scheduler, ) from transformers.utils import check_min_version, send_example_telemetry from transformers.utils.versions import require_version # Will error if the minimal version of Transformers is not installed. Remove at your own risks. check_min_version("4.39.0.dev0") logger = get_logger(__name__) require_version("datasets>=1.8.0", "To fix: pip install -r examples/pytorch/language-modeling/requirements.txt") MODEL_CONFIG_CLASSES = list(MODEL_MAPPING.keys()) MODEL_TYPES = tuple(conf.model_type for conf in MODEL_CONFIG_CLASSES) def parse_args(): parser = argparse.ArgumentParser(description="Finetune a transformers model on a causal language modeling task") parser.add_argument( "--dataset_name", type=str, default=None, help="The name of the dataset to use (via the datasets library).", ) parser.add_argument( "--dataset_config_name", type=str, default=None, help="The configuration name of the dataset to use (via the datasets library).", ) parser.add_argument( "--train_file", type=str, default=None, help="A csv, txt or a json file containing the training data." ) parser.add_argument( "--validation_file", type=str, default=None, help="A csv, txt or a json file containing the validation data." ) parser.add_argument( "--validation_split_percentage", default=5, help="The percentage of the train set used as validation set in case there's no validation split", ) parser.add_argument( "--model_name_or_path", type=str, help="Path to pretrained model or model identifier from huggingface.co/models.", required=False, ) parser.add_argument( "--config_name", type=str, default=None, help="Pretrained config name or path if not the same as model_name", ) parser.add_argument( "--tokenizer_name", type=str, default=None, help="Pretrained tokenizer name or path if not the same as model_name", ) parser.add_argument( "--use_slow_tokenizer", action="store_true", help="If passed, will use a slow tokenizer (not backed by the 🤗 Tokenizers library).", ) parser.add_argument( "--per_device_train_batch_size", type=int, default=8, help="Batch size (per device) for the training dataloader.", ) parser.add_argument( "--per_device_eval_batch_size", type=int, default=8, help="Batch size (per device) for the evaluation dataloader.", ) parser.add_argument( "--learning_rate", type=float, default=5e-5, help="Initial learning rate (after the potential warmup period) to use.", ) parser.add_argument("--weight_decay", type=float, default=0.0, help="Weight decay to use.") parser.add_argument("--num_train_epochs", type=int, default=3, help="Total number of training epochs to perform.") parser.add_argument( "--max_train_steps", type=int, default=None, help="Total number of training steps to perform. If provided, overrides num_train_epochs.", ) parser.add_argument( "--gradient_accumulation_steps", type=int, default=1, help="Number of updates steps to accumulate before performing a backward/update pass.", ) parser.add_argument( "--lr_scheduler_type", type=SchedulerType, default="linear", help="The scheduler type to use.", choices=["linear", "cosine", "cosine_with_restarts", "polynomial", "constant", "constant_with_warmup"], ) parser.add_argument( "--num_warmup_steps", type=int, default=0, help="Number of steps for the warmup in the lr scheduler." ) parser.add_argument("--output_dir", type=str, default=None, help="Where to store the final model.") parser.add_argument("--seed", type=int, default=None, help="A seed for reproducible training.") parser.add_argument( "--model_type", type=str, default=None, help="Model type to use if training from scratch.", choices=MODEL_TYPES, ) parser.add_argument( "--block_size", type=int, default=None, help=( "Optional input sequence length after tokenization. The training dataset will be truncated in block of" " this size for training. Default to the model max input length for single sentence inputs (take into" " account special tokens)." ), ) parser.add_argument( "--preprocessing_num_workers", type=int, default=None, help="The number of processes to use for the preprocessing.", ) parser.add_argument( "--overwrite_cache", action="store_true", help="Overwrite the cached training and evaluation sets" ) parser.add_argument( "--no_keep_linebreaks", action="store_true", help="Do not keep line breaks when using TXT files." ) parser.add_argument("--push_to_hub", action="store_true", help="Whether or not to push the model to the Hub.") parser.add_argument( "--hub_model_id", type=str, help="The name of the repository to keep in sync with the local `output_dir`." ) parser.add_argument("--hub_token", type=str, help="The token to use to push to the Model Hub.") parser.add_argument( "--trust_remote_code", type=bool, default=False, help=( "Whether or not to allow for custom models defined on the Hub in their own modeling files. This option " "should only be set to `True` for repositories you trust and in which you have read the code, as it will " "execute code present on the Hub on your local machine." ), ) parser.add_argument( "--checkpointing_steps", type=str, default=None, help="Whether the various states should be saved at the end of every n steps, or 'epoch' for each epoch.", ) parser.add_argument( "--resume_from_checkpoint", type=str, default=None, help="If the training should continue from a checkpoint folder.", ) parser.add_argument( "--with_tracking", action="store_true", help="Whether to enable experiment trackers for logging.", ) parser.add_argument( "--report_to", type=str, default="all", help=( 'The integration to report the results and logs to. Supported platforms are `"tensorboard"`,' ' `"wandb"`, `"comet_ml"` and `"clearml"`. Use `"all"` (default) to report to all integrations. ' "Only applicable when `--with_tracking` is passed." ), ) parser.add_argument( "--low_cpu_mem_usage", action="store_true", help=( "It is an option to create the model as an empty shell, then only materialize its parameters when the pretrained weights are loaded. " "If passed, LLM loading time and RAM consumption will be benefited." ), ) args = parser.parse_args() # Sanity checks if args.dataset_name is None and args.train_file is None and args.validation_file is None: raise ValueError("Need either a dataset name or a training/validation file.") else: if args.train_file is not None: extension = args.train_file.split(".")[-1] if extension not in ["csv", "json", "txt"]: raise ValueError("`train_file` should be a csv, json or txt file.") if args.validation_file is not None: extension = args.validation_file.split(".")[-1] if extension not in ["csv", "json", "txt"]: raise ValueError("`validation_file` should be a csv, json or txt file.") if args.push_to_hub: if args.output_dir is None: raise ValueError("Need an `output_dir` to create a repo when `--push_to_hub` is passed.") return args def main(): args = parse_args() # Sending telemetry. Tracking the example usage helps us better allocate resources to maintain them. The # information sent is the one passed as arguments along with your Python/PyTorch versions. send_example_telemetry("run_clm_no_trainer", args) # Initialize the accelerator. We will let the accelerator handle device placement for us in this example. # If we're using tracking, we also need to initialize it here and it will by default pick up all supported trackers # in the environment accelerator_log_kwargs = {} if args.with_tracking: accelerator_log_kwargs["log_with"] = args.report_to accelerator_log_kwargs["project_dir"] = args.output_dir accelerator = Accelerator(gradient_accumulation_steps=args.gradient_accumulation_steps, **accelerator_log_kwargs) # Make one log on every process with the configuration for debugging. logging.basicConfig( format="%(asctime)s - %(levelname)s - %(name)s - %(message)s", datefmt="%m/%d/%Y %H:%M:%S", level=logging.INFO, ) logger.info(accelerator.state, main_process_only=False) if accelerator.is_local_main_process: datasets.utils.logging.set_verbosity_warning() transformers.utils.logging.set_verbosity_info() else: datasets.utils.logging.set_verbosity_error() transformers.utils.logging.set_verbosity_error() # If passed along, set the training seed now. if args.seed is not None: set_seed(args.seed) # Handle the repository creation if accelerator.is_main_process: if args.push_to_hub: # Retrieve of infer repo_name repo_name = args.hub_model_id if repo_name is None: repo_name = Path(args.output_dir).absolute().name # Create repo and retrieve repo_id repo_id = create_repo(repo_name, exist_ok=True, token=args.hub_token).repo_id # Clone repo locally repo = Repository(args.output_dir, clone_from=repo_id, token=args.hub_token) with open(os.path.join(args.output_dir, ".gitignore"), "w+") as gitignore: if "step_*" not in gitignore: gitignore.write("step_*\n") if "epoch_*" not in gitignore: gitignore.write("epoch_*\n") elif args.output_dir is not None: os.makedirs(args.output_dir, exist_ok=True) accelerator.wait_for_everyone() # Get the datasets: you can either provide your own CSV/JSON/TXT training and evaluation files (see below) # or just provide the name of one of the public datasets available on the hub at https://huggingface.co/datasets/ # (the dataset will be downloaded automatically from the datasets Hub). # # For CSV/JSON files, this script will use the column called 'text' or the first column if no column called # 'text' is found. You can easily tweak this behavior (see below). # # In distributed training, the load_dataset function guarantee that only one local process can concurrently # download the dataset. if args.dataset_name is not None: # Downloading and loading a dataset from the hub. raw_datasets = load_dataset(args.dataset_name, args.dataset_config_name) if "validation" not in raw_datasets.keys(): raw_datasets["validation"] = load_dataset( args.dataset_name, args.dataset_config_name, split=f"train[:{args.validation_split_percentage}%]", ) raw_datasets["train"] = load_dataset( args.dataset_name, args.dataset_config_name, split=f"train[{args.validation_split_percentage}%:]", ) else: data_files = {} dataset_args = {} if args.train_file is not None: data_files["train"] = args.train_file extension = args.train_file.split(".")[-1] if args.validation_file is not None: data_files["validation"] = args.validation_file extension = args.validation_file.split(".")[-1] if extension == "txt": extension = "text" dataset_args["keep_linebreaks"] = not args.no_keep_linebreaks raw_datasets = load_dataset(extension, data_files=data_files, **dataset_args) # If no validation data is there, validation_split_percentage will be used to divide the dataset. if "validation" not in raw_datasets.keys(): raw_datasets["validation"] = load_dataset( extension, data_files=data_files, split=f"train[:{args.validation_split_percentage}%]", **dataset_args, ) raw_datasets["train"] = load_dataset( extension, data_files=data_files, split=f"train[{args.validation_split_percentage}%:]", **dataset_args, ) # See more about loading any type of standard or custom dataset (from files, python dict, pandas DataFrame, etc) at # https://huggingface.co/docs/datasets/loading_datasets. # Load pretrained model and tokenizer # # In distributed training, the .from_pretrained methods guarantee that only one local process can concurrently # download model & vocab. if args.config_name: config = AutoConfig.from_pretrained( args.config_name, trust_remote_code=args.trust_remote_code, ) elif args.model_name_or_path: config = AutoConfig.from_pretrained( args.model_name_or_path, trust_remote_code=args.trust_remote_code, ) else: config = CONFIG_MAPPING[args.model_type]() logger.warning("You are instantiating a new config instance from scratch.") if args.tokenizer_name: tokenizer = AutoTokenizer.from_pretrained( args.tokenizer_name, use_fast=not args.use_slow_tokenizer, trust_remote_code=args.trust_remote_code ) elif args.model_name_or_path: tokenizer = AutoTokenizer.from_pretrained( args.model_name_or_path, use_fast=not args.use_slow_tokenizer, trust_remote_code=args.trust_remote_code ) else: raise ValueError( "You are instantiating a new tokenizer from scratch. This is not supported by this script. " "You can do it from another script, save it, and load it from here, using --tokenizer_name." ) if args.model_name_or_path: model = AutoModelForCausalLM.from_pretrained( args.model_name_or_path, from_tf=bool(".ckpt" in args.model_name_or_path), config=config, low_cpu_mem_usage=args.low_cpu_mem_usage, trust_remote_code=args.trust_remote_code, ) else: logger.info("Training new model from scratch") model = AutoModelForCausalLM.from_config(config, trust_remote_code=args.trust_remote_code) # We resize the embeddings only when necessary to avoid index errors. If you are creating a model from scratch # on a small vocab and want a smaller embedding size, remove this test. embedding_size = model.get_input_embeddings().weight.shape[0] if len(tokenizer) > embedding_size: model.resize_token_embeddings(len(tokenizer)) # Preprocessing the datasets. # First we tokenize all the texts. column_names = raw_datasets["train"].column_names text_column_name = "text" if "text" in column_names else column_names[0] def tokenize_function(examples): return tokenizer(examples[text_column_name]) with accelerator.main_process_first(): tokenized_datasets = raw_datasets.map( tokenize_function, batched=True, num_proc=args.preprocessing_num_workers, remove_columns=column_names, load_from_cache_file=not args.overwrite_cache, desc="Running tokenizer on dataset", ) if args.block_size is None: block_size = tokenizer.model_max_length if block_size > config.max_position_embeddings: logger.warning( f"The tokenizer picked seems to have a very large `model_max_length` ({tokenizer.model_max_length}). " f"Using block_size={min(1024, config.max_position_embeddings)} instead. You can change that default value by passing --block_size xxx." ) block_size = min(1024, config.max_position_embeddings) else: if args.block_size > tokenizer.model_max_length: logger.warning( f"The block_size passed ({args.block_size}) is larger than the maximum length for the model " f"({tokenizer.model_max_length}). Using block_size={tokenizer.model_max_length}." ) block_size = min(args.block_size, tokenizer.model_max_length) # Main data processing function that will concatenate all texts from our dataset and generate chunks of block_size. def group_texts(examples): # Concatenate all texts. concatenated_examples = {k: list(chain(*examples[k])) for k in examples.keys()} total_length = len(concatenated_examples[list(examples.keys())[0]]) # We drop the small remainder, and if the total_length < block_size we exclude this batch and return an empty dict. # We could add padding if the model supported it instead of this drop, you can customize this part to your needs. total_length = (total_length // block_size) * block_size # Split by chunks of max_len. result = { k: [t[i : i + block_size] for i in range(0, total_length, block_size)] for k, t in concatenated_examples.items() } result["labels"] = result["input_ids"].copy() return result # Note that with `batched=True`, this map processes 1,000 texts together, so group_texts throws away a remainder # for each of those groups of 1,000 texts. You can adjust that batch_size here but a higher value might be slower # to preprocess. # # To speed up this part, we use multiprocessing. See the documentation of the map method for more information: # https://huggingface.co/docs/datasets/process#map with accelerator.main_process_first(): lm_datasets = tokenized_datasets.map( group_texts, batched=True, num_proc=args.preprocessing_num_workers, load_from_cache_file=not args.overwrite_cache, desc=f"Grouping texts in chunks of {block_size}", ) train_dataset = lm_datasets["train"] eval_dataset = lm_datasets["validation"] # Log a few random samples from the training set: for index in random.sample(range(len(train_dataset)), 3): logger.info(f"Sample {index} of the training set: {train_dataset[index]}.") # DataLoaders creation: train_dataloader = DataLoader( train_dataset, shuffle=True, collate_fn=default_data_collator, batch_size=args.per_device_train_batch_size ) eval_dataloader = DataLoader( eval_dataset, collate_fn=default_data_collator, batch_size=args.per_device_eval_batch_size ) # Optimizer # Split weights in two groups, one with weight decay and the other not. no_decay = ["bias", "layer_norm.weight"] optimizer_grouped_parameters = [ { "params": [p for n, p in model.named_parameters() if not any(nd in n for nd in no_decay)], "weight_decay": args.weight_decay, }, { "params": [p for n, p in model.named_parameters() if any(nd in n for nd in no_decay)], "weight_decay": 0.0, }, ] optimizer = torch.optim.AdamW(optimizer_grouped_parameters, lr=args.learning_rate) # Scheduler and math around the number of training steps. overrode_max_train_steps = False num_update_steps_per_epoch = math.ceil(len(train_dataloader) / args.gradient_accumulation_steps) if args.max_train_steps is None: args.max_train_steps = args.num_train_epochs * num_update_steps_per_epoch overrode_max_train_steps = True lr_scheduler = get_scheduler( name=args.lr_scheduler_type, optimizer=optimizer, num_warmup_steps=args.num_warmup_steps * accelerator.num_processes, num_training_steps=args.max_train_steps if overrode_max_train_steps else args.max_train_steps * accelerator.num_processes, ) # Prepare everything with our `accelerator`. model, optimizer, train_dataloader, eval_dataloader, lr_scheduler = accelerator.prepare( model, optimizer, train_dataloader, eval_dataloader, lr_scheduler ) # On TPU, the tie weights in our model have been disconnected, so we need to restore the ties. if accelerator.distributed_type == DistributedType.TPU: model.tie_weights() # We need to recalculate our total training steps as the size of the training dataloader may have changed. num_update_steps_per_epoch = math.ceil(len(train_dataloader) / args.gradient_accumulation_steps) if overrode_max_train_steps: args.max_train_steps = args.num_train_epochs * num_update_steps_per_epoch # Afterwards we recalculate our number of training epochs args.num_train_epochs = math.ceil(args.max_train_steps / num_update_steps_per_epoch) # Figure out how many steps we should save the Accelerator states checkpointing_steps = args.checkpointing_steps if checkpointing_steps is not None and checkpointing_steps.isdigit(): checkpointing_steps = int(checkpointing_steps) # We need to initialize the trackers we use, and also store our configuration. # The trackers initializes automatically on the main process. if args.with_tracking: experiment_config = vars(args) # TensorBoard cannot log Enums, need the raw value experiment_config["lr_scheduler_type"] = experiment_config["lr_scheduler_type"].value accelerator.init_trackers("clm_no_trainer", experiment_config) # Train! total_batch_size = args.per_device_train_batch_size * accelerator.num_processes * args.gradient_accumulation_steps logger.info("***** Running training *****") logger.info(f" Num examples = {len(train_dataset)}") logger.info(f" Num Epochs = {args.num_train_epochs}") logger.info(f" Instantaneous batch size per device = {args.per_device_train_batch_size}") logger.info(f" Total train batch size (w. parallel, distributed & accumulation) = {total_batch_size}") logger.info(f" Gradient Accumulation steps = {args.gradient_accumulation_steps}") logger.info(f" Total optimization steps = {args.max_train_steps}") # Only show the progress bar once on each machine. progress_bar = tqdm(range(args.max_train_steps), disable=not accelerator.is_local_main_process) completed_steps = 0 starting_epoch = 0 # Potentially load in the weights and states from a previous save if args.resume_from_checkpoint: if args.resume_from_checkpoint is not None or args.resume_from_checkpoint != "": checkpoint_path = args.resume_from_checkpoint path = os.path.basename(args.resume_from_checkpoint) else: # Get the most recent checkpoint dirs = [f.name for f in os.scandir(os.getcwd()) if f.is_dir()] dirs.sort(key=os.path.getctime) path = dirs[-1] # Sorts folders by date modified, most recent checkpoint is the last checkpoint_path = path path = os.path.basename(checkpoint_path) accelerator.print(f"Resumed from checkpoint: {checkpoint_path}") accelerator.load_state(checkpoint_path) # Extract `epoch_{i}` or `step_{i}` training_difference = os.path.splitext(path)[0] if "epoch" in training_difference: starting_epoch = int(training_difference.replace("epoch_", "")) + 1 resume_step = None completed_steps = starting_epoch * num_update_steps_per_epoch else: # need to multiply `gradient_accumulation_steps` to reflect real steps resume_step = int(training_difference.replace("step_", "")) * args.gradient_accumulation_steps starting_epoch = resume_step // len(train_dataloader) completed_steps = resume_step // args.gradient_accumulation_steps resume_step -= starting_epoch * len(train_dataloader) # update the progress_bar if load from checkpoint progress_bar.update(completed_steps) for epoch in range(starting_epoch, args.num_train_epochs): model.train() if args.with_tracking: total_loss = 0 if args.resume_from_checkpoint and epoch == starting_epoch and resume_step is not None: # We skip the first `n` batches in the dataloader when resuming from a checkpoint active_dataloader = accelerator.skip_first_batches(train_dataloader, resume_step) else: active_dataloader = train_dataloader for step, batch in enumerate(active_dataloader): with accelerator.accumulate(model): outputs = model(**batch) loss = outputs.loss # We keep track of the loss at each epoch if args.with_tracking: total_loss += loss.detach().float() accelerator.backward(loss) optimizer.step() lr_scheduler.step() optimizer.zero_grad() # Checks if the accelerator has performed an optimization step behind the scenes if accelerator.sync_gradients: progress_bar.update(1) completed_steps += 1 if isinstance(checkpointing_steps, int): if completed_steps % checkpointing_steps == 0: output_dir = f"step_{completed_steps}" if args.output_dir is not None: output_dir = os.path.join(args.output_dir, output_dir) accelerator.save_state(output_dir) if completed_steps >= args.max_train_steps: break model.eval() losses = [] for step, batch in enumerate(eval_dataloader): with torch.no_grad(): outputs = model(**batch) loss = outputs.loss losses.append(accelerator.gather_for_metrics(loss.repeat(args.per_device_eval_batch_size))) losses = torch.cat(losses) try: eval_loss = torch.mean(losses) perplexity = math.exp(eval_loss) except OverflowError: perplexity = float("inf") logger.info(f"epoch {epoch}: perplexity: {perplexity} eval_loss: {eval_loss}") if args.with_tracking: accelerator.log( { "perplexity": perplexity, "eval_loss": eval_loss, "train_loss": total_loss.item() / len(train_dataloader), "epoch": epoch, "step": completed_steps, }, step=completed_steps, ) if args.push_to_hub and epoch < args.num_train_epochs - 1: accelerator.wait_for_everyone() unwrapped_model = accelerator.unwrap_model(model) unwrapped_model.save_pretrained( args.output_dir, is_main_process=accelerator.is_main_process, save_function=accelerator.save ) if accelerator.is_main_process: tokenizer.save_pretrained(args.output_dir) repo.push_to_hub( commit_message=f"Training in progress epoch {epoch}", blocking=False, auto_lfs_prune=True ) if args.checkpointing_steps == "epoch": output_dir = f"epoch_{epoch}" if args.output_dir is not None: output_dir = os.path.join(args.output_dir, output_dir) accelerator.save_state(output_dir) if args.with_tracking: accelerator.end_training() if args.output_dir is not None: accelerator.wait_for_everyone() unwrapped_model = accelerator.unwrap_model(model) unwrapped_model.save_pretrained( args.output_dir, is_main_process=accelerator.is_main_process, save_function=accelerator.save ) if accelerator.is_main_process: tokenizer.save_pretrained(args.output_dir) if args.push_to_hub: repo.push_to_hub(commit_message="End of training", auto_lfs_prune=True) with open(os.path.join(args.output_dir, "all_results.json"), "w") as f: json.dump({"perplexity": perplexity}, f) if __name__ == "__main__": main()

transformers/examples/pytorch/language-modeling/run_clm_no_trainer.py/0

{ "file_path": "transformers/examples/pytorch/language-modeling/run_clm_no_trainer.py", "repo_id": "transformers", "token_count": 12573 }

46

#!/usr/bin/env python # coding=utf-8 # Copyright 2021 The HuggingFace Team All rights reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. """ Fine-tuning the library's seq2seq models for question answering using the 🤗 Seq2SeqTrainer. """ # You can also adapt this script on your own question answering task. Pointers for this are left as comments. import logging import os import sys import warnings from dataclasses import dataclass, field from typing import List, Optional, Tuple import datasets import evaluate import numpy as np from datasets import load_dataset from trainer_seq2seq_qa import QuestionAnsweringSeq2SeqTrainer import transformers from transformers import ( AutoConfig, AutoModelForSeq2SeqLM, AutoTokenizer, DataCollatorForSeq2Seq, HfArgumentParser, Seq2SeqTrainingArguments, set_seed, ) from transformers.trainer_utils import EvalLoopOutput, EvalPrediction, get_last_checkpoint from transformers.utils import check_min_version, send_example_telemetry from transformers.utils.versions import require_version # Will error if the minimal version of Transformers is not installed. Remove at your own risks. check_min_version("4.39.0.dev0") require_version("datasets>=1.8.0", "To fix: pip install -r examples/pytorch/question-answering/requirements.txt") logger = logging.getLogger(__name__) @dataclass class ModelArguments: """ Arguments pertaining to which model/config/tokenizer we are going to fine-tune from. """ model_name_or_path: str = field( metadata={"help": "Path to pretrained model or model identifier from huggingface.co/models"} ) config_name: Optional[str] = field( default=None, metadata={"help": "Pretrained config name or path if not the same as model_name"} ) tokenizer_name: Optional[str] = field( default=None, metadata={"help": "Pretrained tokenizer name or path if not the same as model_name"} ) cache_dir: Optional[str] = field( default=None, metadata={"help": "Path to directory to store the pretrained models downloaded from huggingface.co"}, ) use_fast_tokenizer: bool = field( default=True, metadata={"help": "Whether to use one of the fast tokenizer (backed by the tokenizers library) or not."}, ) model_revision: str = field( default="main", metadata={"help": "The specific model version to use (can be a branch name, tag name or commit id)."}, ) token: str = field( default=None, metadata={ "help": ( "The token to use as HTTP bearer authorization for remote files. If not specified, will use the token " "generated when running `huggingface-cli login` (stored in `~/.huggingface`)." ) }, ) use_auth_token: bool = field( default=None, metadata={ "help": "The `use_auth_token` argument is deprecated and will be removed in v4.34. Please use `token` instead." }, ) trust_remote_code: bool = field( default=False, metadata={ "help": ( "Whether or not to allow for custom models defined on the Hub in their own modeling files. This option " "should only be set to `True` for repositories you trust and in which you have read the code, as it will " "execute code present on the Hub on your local machine." ) }, ) @dataclass class DataTrainingArguments: """ Arguments pertaining to what data we are going to input our model for training and eval. """ dataset_name: Optional[str] = field( default=None, metadata={"help": "The name of the dataset to use (via the datasets library)."} ) dataset_config_name: Optional[str] = field( default=None, metadata={"help": "The configuration name of the dataset to use (via the datasets library)."} ) context_column: Optional[str] = field( default="context", metadata={"help": "The name of the column in the datasets containing the contexts (for question answering)."}, ) question_column: Optional[str] = field( default="question", metadata={"help": "The name of the column in the datasets containing the questions (for question answering)."}, ) answer_column: Optional[str] = field( default="answers", metadata={"help": "The name of the column in the datasets containing the answers (for question answering)."}, ) train_file: Optional[str] = field(default=None, metadata={"help": "The input training data file (a text file)."}) validation_file: Optional[str] = field( default=None, metadata={"help": "An optional input evaluation data file to evaluate the perplexity on (a text file)."}, ) test_file: Optional[str] = field( default=None, metadata={"help": "An optional input test data file to evaluate the perplexity on (a text file)."}, ) overwrite_cache: bool = field( default=False, metadata={"help": "Overwrite the cached training and evaluation sets"} ) preprocessing_num_workers: Optional[int] = field( default=None, metadata={"help": "The number of processes to use for the preprocessing."}, ) max_seq_length: int = field( default=384, metadata={ "help": ( "The maximum total input sequence length after tokenization. Sequences longer " "than this will be truncated, sequences shorter will be padded." ) }, ) max_answer_length: int = field( default=30, metadata={ "help": ( "The maximum length of an answer that can be generated. This is needed because the start " "and end predictions are not conditioned on one another." ) }, ) val_max_answer_length: Optional[int] = field( default=None, metadata={ "help": ( "The maximum total sequence length for validation target text after tokenization. Sequences longer " "than this will be truncated, sequences shorter will be padded. Will default to `max_answer_length`. " "This argument is also used to override the ``max_length`` param of ``model.generate``, which is used " "during ``evaluate`` and ``predict``." ) }, ) pad_to_max_length: bool = field( default=True, metadata={ "help": ( "Whether to pad all samples to `max_seq_length`. If False, will pad the samples dynamically when" " batching to the maximum length in the batch (which can be faster on GPU but will be slower on TPU)." ) }, ) max_train_samples: Optional[int] = field( default=None, metadata={ "help": ( "For debugging purposes or quicker training, truncate the number of training examples to this " "value if set." ) }, ) max_eval_samples: Optional[int] = field( default=None, metadata={ "help": ( "For debugging purposes or quicker training, truncate the number of evaluation examples to this " "value if set." ) }, ) max_predict_samples: Optional[int] = field( default=None, metadata={ "help": ( "For debugging purposes or quicker training, truncate the number of prediction examples to this " "value if set." ) }, ) version_2_with_negative: bool = field( default=False, metadata={"help": "If true, some of the examples do not have an answer."} ) null_score_diff_threshold: float = field( default=0.0, metadata={ "help": ( "The threshold used to select the null answer: if the best answer has a score that is less than " "the score of the null answer minus this threshold, the null answer is selected for this example. " "Only useful when `version_2_with_negative=True`." ) }, ) doc_stride: int = field( default=128, metadata={"help": "When splitting up a long document into chunks, how much stride to take between chunks."}, ) n_best_size: int = field( default=20, metadata={"help": "The total number of n-best predictions to generate when looking for an answer."}, ) num_beams: Optional[int] = field( default=None, metadata={ "help": ( "Number of beams to use for evaluation. This argument will be passed to ``model.generate``, " "which is used during ``evaluate`` and ``predict``." ) }, ) ignore_pad_token_for_loss: bool = field( default=True, metadata={ "help": "Whether to ignore the tokens corresponding to padded labels in the loss computation or not." }, ) def __post_init__(self): if ( self.dataset_name is None and self.train_file is None and self.validation_file is None and self.test_file is None ): raise ValueError("Need either a dataset name or a training/validation file/test_file.") else: if self.train_file is not None: extension = self.train_file.split(".")[-1] assert extension in ["csv", "json"], "`train_file` should be a csv or a json file." if self.validation_file is not None: extension = self.validation_file.split(".")[-1] assert extension in ["csv", "json"], "`validation_file` should be a csv or a json file." if self.test_file is not None: extension = self.test_file.split(".")[-1] assert extension in ["csv", "json"], "`test_file` should be a csv or a json file." if self.val_max_answer_length is None: self.val_max_answer_length = self.max_answer_length question_answering_column_name_mapping = { "squad_v2": ("question", "context", "answer"), } def main(): # See all possible arguments in src/transformers/training_args.py # or by passing the --help flag to this script. # We now keep distinct sets of args, for a cleaner separation of concerns. parser = HfArgumentParser((ModelArguments, DataTrainingArguments, Seq2SeqTrainingArguments)) if len(sys.argv) == 2 and sys.argv[1].endswith(".json"): # If we pass only one argument to the script and it's the path to a json file, # let's parse it to get our arguments. model_args, data_args, training_args = parser.parse_json_file(json_file=os.path.abspath(sys.argv[1])) else: model_args, data_args, training_args = parser.parse_args_into_dataclasses() if model_args.use_auth_token is not None: warnings.warn( "The `use_auth_token` argument is deprecated and will be removed in v4.34. Please use `token` instead.", FutureWarning, ) if model_args.token is not None: raise ValueError("`token` and `use_auth_token` are both specified. Please set only the argument `token`.") model_args.token = model_args.use_auth_token # Sending telemetry. Tracking the example usage helps us better allocate resources to maintain them. The # information sent is the one passed as arguments along with your Python/PyTorch versions. send_example_telemetry("run_seq2seq_qa", model_args, data_args) # Setup logging logging.basicConfig( format="%(asctime)s - %(levelname)s - %(name)s - %(message)s", datefmt="%m/%d/%Y %H:%M:%S", handlers=[logging.StreamHandler(sys.stdout)], ) if training_args.should_log: # The default of training_args.log_level is passive, so we set log level at info here to have that default. transformers.utils.logging.set_verbosity_info() log_level = training_args.get_process_log_level() logger.setLevel(log_level) datasets.utils.logging.set_verbosity(log_level) transformers.utils.logging.set_verbosity(log_level) transformers.utils.logging.enable_default_handler() transformers.utils.logging.enable_explicit_format() # Log on each process the small summary: logger.warning( f"Process rank: {training_args.local_rank}, device: {training_args.device}, n_gpu: {training_args.n_gpu}, " + f"distributed training: {training_args.parallel_mode.value == 'distributed'}, 16-bits training: {training_args.fp16}" ) logger.info(f"Training/evaluation parameters {training_args}") # Detecting last checkpoint. last_checkpoint = None if os.path.isdir(training_args.output_dir) and training_args.do_train and not training_args.overwrite_output_dir: last_checkpoint = get_last_checkpoint(training_args.output_dir) if last_checkpoint is None and len(os.listdir(training_args.output_dir)) > 0: raise ValueError( f"Output directory ({training_args.output_dir}) already exists and is not empty. " "Use --overwrite_output_dir to overcome." ) elif last_checkpoint is not None and training_args.resume_from_checkpoint is None: logger.info( f"Checkpoint detected, resuming training at {last_checkpoint}. To avoid this behavior, change " "the `--output_dir` or add `--overwrite_output_dir` to train from scratch." ) # Set seed before initializing model. set_seed(training_args.seed) # Get the datasets: you can either provide your own CSV/JSON/TXT training and evaluation files (see below) # or just provide the name of one of the public datasets available on the hub at https://huggingface.co/datasets/ # (the dataset will be downloaded automatically from the datasets Hub). # # For CSV/JSON files, this script will use the column called 'text' or the first column if no column called # 'text' is found. You can easily tweak this behavior (see below). # # In distributed training, the load_dataset function guarantee that only one local process can concurrently # download the dataset. if data_args.dataset_name is not None: # Downloading and loading a dataset from the hub. raw_datasets = load_dataset( data_args.dataset_name, data_args.dataset_config_name, cache_dir=model_args.cache_dir, token=model_args.token, ) else: data_files = {} if data_args.train_file is not None: data_files["train"] = data_args.train_file extension = data_args.train_file.split(".")[-1] if data_args.validation_file is not None: data_files["validation"] = data_args.validation_file extension = data_args.validation_file.split(".")[-1] if data_args.test_file is not None: data_files["test"] = data_args.test_file extension = data_args.test_file.split(".")[-1] raw_datasets = load_dataset( extension, data_files=data_files, field="data", cache_dir=model_args.cache_dir, token=model_args.token, ) # See more about loading any type of standard or custom dataset (from files, python dict, pandas DataFrame, etc) at # https://huggingface.co/docs/datasets/loading_datasets. # Load pretrained model and tokenizer # # Distributed training: # The .from_pretrained methods guarantee that only one local process can concurrently # download model & vocab. config = AutoConfig.from_pretrained( model_args.config_name if model_args.config_name else model_args.model_name_or_path, cache_dir=model_args.cache_dir, revision=model_args.model_revision, token=model_args.token, trust_remote_code=model_args.trust_remote_code, ) tokenizer = AutoTokenizer.from_pretrained( model_args.tokenizer_name if model_args.tokenizer_name else model_args.model_name_or_path, cache_dir=model_args.cache_dir, use_fast=model_args.use_fast_tokenizer, revision=model_args.model_revision, token=model_args.token, trust_remote_code=model_args.trust_remote_code, ) model = AutoModelForSeq2SeqLM.from_pretrained( model_args.model_name_or_path, from_tf=bool(".ckpt" in model_args.model_name_or_path), config=config, cache_dir=model_args.cache_dir, revision=model_args.model_revision, token=model_args.token, trust_remote_code=model_args.trust_remote_code, ) # We resize the embeddings only when necessary to avoid index errors. If you are creating a model from scratch # on a small vocab and want a smaller embedding size, remove this test. embedding_size = model.get_input_embeddings().weight.shape[0] if len(tokenizer) > embedding_size: model.resize_token_embeddings(len(tokenizer)) if model.config.decoder_start_token_id is None: raise ValueError("Make sure that `config.decoder_start_token_id` is correctly defined") # Preprocessing the datasets. # We need to generate and tokenize inputs and targets. if training_args.do_train: column_names = raw_datasets["train"].column_names elif training_args.do_eval: column_names = raw_datasets["validation"].column_names elif training_args.do_predict: column_names = raw_datasets["test"].column_names else: logger.info("There is nothing to do. Please pass `do_train`, `do_eval` and/or `do_predict`.") return # Get the column names for input/target. dataset_columns = question_answering_column_name_mapping.get(data_args.dataset_name, None) if data_args.question_column is None: question_column = dataset_columns[0] if dataset_columns is not None else column_names[0] else: question_column = data_args.question_column if question_column not in column_names: raise ValueError( f"--question_column' value '{data_args.question_column}' needs to be one of: {', '.join(column_names)}" ) if data_args.context_column is None: context_column = dataset_columns[1] if dataset_columns is not None else column_names[1] else: context_column = data_args.context_column if context_column not in column_names: raise ValueError( f"--context_column' value '{data_args.context_column}' needs to be one of: {', '.join(column_names)}" ) if data_args.answer_column is None: answer_column = dataset_columns[2] if dataset_columns is not None else column_names[2] else: answer_column = data_args.answer_column if answer_column not in column_names: raise ValueError( f"--answer_column' value '{data_args.answer_column}' needs to be one of: {', '.join(column_names)}" ) # Temporarily set max_answer_length for training. max_answer_length = data_args.max_answer_length padding = "max_length" if data_args.pad_to_max_length else False if training_args.label_smoothing_factor > 0 and not hasattr(model, "prepare_decoder_input_ids_from_labels"): logger.warning( "label_smoothing is enabled but the `prepare_decoder_input_ids_from_labels` method is not defined for " f"`{model.__class__.__name__}`. This will lead to loss being calculated twice and will take up more memory" ) if data_args.max_seq_length > tokenizer.model_max_length: logger.warning( f"The max_seq_length passed ({data_args.max_seq_length}) is larger than the maximum length for the " f"model ({tokenizer.model_max_length}). Using max_seq_length={tokenizer.model_max_length}." ) max_seq_length = min(data_args.max_seq_length, tokenizer.model_max_length) def preprocess_squad_batch( examples, question_column: str, context_column: str, answer_column: str, ) -> Tuple[List[str], List[str]]: questions = examples[question_column] contexts = examples[context_column] answers = examples[answer_column] def generate_input(_question, _context): return " ".join(["question:", _question.lstrip(), "context:", _context.lstrip()]) inputs = [generate_input(question, context) for question, context in zip(questions, contexts)] targets = [answer["text"][0] if len(answer["text"]) > 0 else "" for answer in answers] return inputs, targets def preprocess_function(examples): inputs, targets = preprocess_squad_batch(examples, question_column, context_column, answer_column) model_inputs = tokenizer(inputs, max_length=max_seq_length, padding=padding, truncation=True) # Tokenize targets with text_target=... labels = tokenizer(text_target=targets, max_length=max_answer_length, padding=padding, truncation=True) # If we are padding here, replace all tokenizer.pad_token_id in the labels by -100 when we want to ignore # padding in the loss. if padding == "max_length" and data_args.ignore_pad_token_for_loss: labels["input_ids"] = [ [(l if l != tokenizer.pad_token_id else -100) for l in label] for label in labels["input_ids"] ] model_inputs["labels"] = labels["input_ids"] return model_inputs # Validation preprocessing def preprocess_validation_function(examples): inputs, targets = preprocess_squad_batch(examples, question_column, context_column, answer_column) model_inputs = tokenizer( inputs, max_length=max_seq_length, padding=padding, truncation=True, return_overflowing_tokens=True, return_offsets_mapping=True, ) # Tokenize targets with the `text_target` keyword argument labels = tokenizer(text_target=targets, max_length=max_answer_length, padding=padding, truncation=True) # If we are padding here, replace all tokenizer.pad_token_id in the labels by -100 when we want to ignore # padding in the loss. if padding == "max_length" and data_args.ignore_pad_token_for_loss: labels["input_ids"] = [ [(l if l != tokenizer.pad_token_id else -100) for l in label] for label in labels["input_ids"] ] # Since one example might give us several features if it has a long context, we need a map from a feature to # its corresponding example. This key gives us just that. sample_mapping = model_inputs.pop("overflow_to_sample_mapping") # For evaluation, we will need to convert our predictions to substrings of the context, so we keep the # corresponding example_id and we will store the offset mappings. model_inputs["example_id"] = [] # Augment the overflowing tokens to the labels labels_out = [] for i in range(len(model_inputs["input_ids"])): # One example can give several spans, this is the index of the example containing this span of text. sample_index = sample_mapping[i] model_inputs["example_id"].append(examples["id"][sample_index]) labels_out.append(labels["input_ids"][sample_index]) model_inputs["labels"] = labels_out return model_inputs if training_args.do_train: if "train" not in raw_datasets: raise ValueError("--do_train requires a train dataset") train_dataset = raw_datasets["train"] if data_args.max_train_samples is not None: # We will select sample from whole data if argument is specified max_train_samples = min(len(train_dataset), data_args.max_train_samples) train_dataset = train_dataset.select(range(max_train_samples)) # Create train feature from dataset with training_args.main_process_first(desc="train dataset map pre-processing"): train_dataset = train_dataset.map( preprocess_function, batched=True, num_proc=data_args.preprocessing_num_workers, remove_columns=column_names, load_from_cache_file=not data_args.overwrite_cache, desc="Running tokenizer on train dataset", ) if data_args.max_train_samples is not None: # Number of samples might increase during Feature Creation, We select only specified max samples max_train_samples = min(len(train_dataset), data_args.max_train_samples) train_dataset = train_dataset.select(range(max_train_samples)) if training_args.do_eval: if "validation" not in raw_datasets: raise ValueError("--do_eval requires a validation dataset") eval_examples = raw_datasets["validation"] if data_args.max_eval_samples is not None: # We will select sample from whole data max_eval_samples = min(len(eval_examples), data_args.max_eval_samples) eval_examples = eval_examples.select(range(max_eval_samples)) # Validation Feature Creation with training_args.main_process_first(desc="validation dataset map pre-processing"): eval_dataset = eval_examples.map( preprocess_validation_function, batched=True, num_proc=data_args.preprocessing_num_workers, remove_columns=column_names, load_from_cache_file=not data_args.overwrite_cache, desc="Running tokenizer on validation dataset", ) if data_args.max_eval_samples is not None: # During Feature creation dataset samples might increase, we will select required samples again max_eval_samples = min(len(eval_dataset), data_args.max_eval_samples) eval_dataset = eval_dataset.select(range(max_eval_samples)) if training_args.do_predict: if "test" not in raw_datasets: raise ValueError("--do_predict requires a test dataset") predict_examples = raw_datasets["test"] if data_args.max_predict_samples is not None: # We will select sample from whole data predict_examples = predict_examples.select(range(data_args.max_predict_samples)) # Predict Feature Creation with training_args.main_process_first(desc="prediction dataset map pre-processing"): predict_dataset = predict_examples.map( preprocess_validation_function, batched=True, num_proc=data_args.preprocessing_num_workers, remove_columns=column_names, load_from_cache_file=not data_args.overwrite_cache, desc="Running tokenizer on prediction dataset", ) if data_args.max_predict_samples is not None: # During Feature creation dataset samples might increase, we will select required samples again max_predict_samples = min(len(predict_dataset), data_args.max_predict_samples) predict_dataset = predict_dataset.select(range(max_predict_samples)) # Data collator label_pad_token_id = -100 if data_args.ignore_pad_token_for_loss else tokenizer.pad_token_id data_collator = DataCollatorForSeq2Seq( tokenizer, model=model, label_pad_token_id=label_pad_token_id, pad_to_multiple_of=8 if training_args.fp16 else None, ) metric = evaluate.load( "squad_v2" if data_args.version_2_with_negative else "squad", cache_dir=model_args.cache_dir ) def compute_metrics(p: EvalPrediction): return metric.compute(predictions=p.predictions, references=p.label_ids) # Post-processing: def post_processing_function( examples: datasets.Dataset, features: datasets.Dataset, outputs: EvalLoopOutput, stage="eval" ): # Decode the predicted tokens. preds = outputs.predictions if isinstance(preds, tuple): preds = preds[0] # Replace -100s used for padding as we can't decode them preds = np.where(preds != -100, preds, tokenizer.pad_token_id) decoded_preds = tokenizer.batch_decode(preds, skip_special_tokens=True) # Build a map example to its corresponding features. example_id_to_index = {k: i for i, k in enumerate(examples["id"])} feature_per_example = {example_id_to_index[feature["example_id"]]: i for i, feature in enumerate(features)} predictions = {} # Let's loop over all the examples! for example_index, example in enumerate(examples): # This is the index of the feature associated to the current example. feature_index = feature_per_example[example_index] predictions[example["id"]] = decoded_preds[feature_index] # Format the result to the format the metric expects. if data_args.version_2_with_negative: formatted_predictions = [ {"id": k, "prediction_text": v, "no_answer_probability": 0.0} for k, v in predictions.items() ] else: formatted_predictions = [{"id": k, "prediction_text": v} for k, v in predictions.items()] references = [{"id": ex["id"], "answers": ex[answer_column]} for ex in examples] return EvalPrediction(predictions=formatted_predictions, label_ids=references) # Initialize our Trainer trainer = QuestionAnsweringSeq2SeqTrainer( model=model, args=training_args, train_dataset=train_dataset if training_args.do_train else None, eval_dataset=eval_dataset if training_args.do_eval else None, eval_examples=eval_examples if training_args.do_eval else None, tokenizer=tokenizer, data_collator=data_collator, compute_metrics=compute_metrics if training_args.predict_with_generate else None, post_process_function=post_processing_function, ) # Training if training_args.do_train: checkpoint = None if training_args.resume_from_checkpoint is not None: checkpoint = training_args.resume_from_checkpoint elif last_checkpoint is not None: checkpoint = last_checkpoint train_result = trainer.train(resume_from_checkpoint=checkpoint) trainer.save_model() # Saves the tokenizer too for easy upload metrics = train_result.metrics max_train_samples = ( data_args.max_train_samples if data_args.max_train_samples is not None else len(train_dataset) ) metrics["train_samples"] = min(max_train_samples, len(train_dataset)) trainer.log_metrics("train", metrics) trainer.save_metrics("train", metrics) trainer.save_state() # Evaluation results = {} max_length = ( training_args.generation_max_length if training_args.generation_max_length is not None else data_args.val_max_answer_length ) num_beams = data_args.num_beams if data_args.num_beams is not None else training_args.generation_num_beams if training_args.do_eval: logger.info("*** Evaluate ***") metrics = trainer.evaluate(max_length=max_length, num_beams=num_beams, metric_key_prefix="eval") max_eval_samples = data_args.max_eval_samples if data_args.max_eval_samples is not None else len(eval_dataset) metrics["eval_samples"] = min(max_eval_samples, len(eval_dataset)) trainer.log_metrics("eval", metrics) trainer.save_metrics("eval", metrics) # Prediction if training_args.do_predict: logger.info("*** Predict ***") results = trainer.predict(predict_dataset, predict_examples) metrics = results.metrics max_predict_samples = ( data_args.max_predict_samples if data_args.max_predict_samples is not None else len(predict_dataset) ) metrics["predict_samples"] = min(max_predict_samples, len(predict_dataset)) trainer.log_metrics("predict", metrics) trainer.save_metrics("predict", metrics) if training_args.push_to_hub: kwargs = {"finetuned_from": model_args.model_name_or_path, "tasks": "question-answering"} if data_args.dataset_name is not None: kwargs["dataset_tags"] = data_args.dataset_name if data_args.dataset_config_name is not None: kwargs["dataset_args"] = data_args.dataset_config_name kwargs["dataset"] = f"{data_args.dataset_name} {data_args.dataset_config_name}" else: kwargs["dataset"] = data_args.dataset_name trainer.push_to_hub(**kwargs) def _mp_fn(index): # For xla_spawn (TPUs) main() if __name__ == "__main__": main()

transformers/examples/pytorch/question-answering/run_seq2seq_qa.py/0

{ "file_path": "transformers/examples/pytorch/question-answering/run_seq2seq_qa.py", "repo_id": "transformers", "token_count": 13528 }

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## Summarization This directory contains examples for finetuning and evaluating transformers on summarization tasks. Please tag @patil-suraj with any issues/unexpected behaviors, or send a PR! For deprecated `bertabs` instructions, see [`bertabs/README.md`](https://github.com/huggingface/transformers/blob/main/examples/research_projects/bertabs/README.md). For the old `finetune_trainer.py` and related utils, see [`examples/legacy/seq2seq`](https://github.com/huggingface/transformers/blob/main/examples/legacy/seq2seq). ### Supported Architectures - `BartForConditionalGeneration` - `FSMTForConditionalGeneration` (translation only) - `MBartForConditionalGeneration` - `MarianMTModel` - `PegasusForConditionalGeneration` - `T5ForConditionalGeneration` - `MT5ForConditionalGeneration` `run_summarization.py` is a lightweight example of how to download and preprocess a dataset from the [🤗 Datasets](https://github.com/huggingface/datasets) library or use your own files (jsonlines or csv), then fine-tune one of the architectures above on it. For custom datasets in `jsonlines` format please see: https://huggingface.co/docs/datasets/loading_datasets#json-files and you also will find examples of these below. ## With Trainer Here is an example on a summarization task: ```bash python examples/pytorch/summarization/run_summarization.py \ --model_name_or_path google-t5/t5-small \ --do_train \ --do_eval \ --dataset_name cnn_dailymail \ --dataset_config "3.0.0" \ --source_prefix "summarize: " \ --output_dir /tmp/tst-summarization \ --per_device_train_batch_size=4 \ --per_device_eval_batch_size=4 \ --overwrite_output_dir \ --predict_with_generate ``` Only T5 models `google-t5/t5-small`, `google-t5/t5-base`, `google-t5/t5-large`, `google-t5/t5-3b` and `google-t5/t5-11b` must use an additional argument: `--source_prefix "summarize: "`. We used CNN/DailyMail dataset in this example as `google-t5/t5-small` was trained on it and one can get good scores even when pre-training with a very small sample. Extreme Summarization (XSum) Dataset is another commonly used dataset for the task of summarization. To use it replace `--dataset_name cnn_dailymail --dataset_config "3.0.0"` with `--dataset_name xsum`. And here is how you would use it on your own files, after adjusting the values for the arguments `--train_file`, `--validation_file`, `--text_column` and `--summary_column` to match your setup: ```bash python examples/pytorch/summarization/run_summarization.py \ --model_name_or_path google-t5/t5-small \ --do_train \ --do_eval \ --train_file path_to_csv_or_jsonlines_file \ --validation_file path_to_csv_or_jsonlines_file \ --source_prefix "summarize: " \ --output_dir /tmp/tst-summarization \ --overwrite_output_dir \ --per_device_train_batch_size=4 \ --per_device_eval_batch_size=4 \ --predict_with_generate ``` The task of summarization supports custom CSV and JSONLINES formats. #### Custom CSV Files If it's a csv file the training and validation files should have a column for the inputs texts and a column for the summaries. If the csv file has just two columns as in the following example: ```csv text,summary "I'm sitting here in a boring room. It's just another rainy Sunday afternoon. I'm wasting my time I got nothing to do. I'm hanging around I'm waiting for you. But nothing ever happens. And I wonder","I'm sitting in a room where I'm waiting for something to happen" "I see trees so green, red roses too. I see them bloom for me and you. And I think to myself what a wonderful world. I see skies so blue and clouds so white. The bright blessed day, the dark sacred night. And I think to myself what a wonderful world.","I'm a gardener and I'm a big fan of flowers." "Christmas time is here. Happiness and cheer. Fun for all that children call. Their favorite time of the year. Snowflakes in the air. Carols everywhere. Olden times and ancient rhymes. Of love and dreams to share","It's that time of year again." ``` The first column is assumed to be for `text` and the second is for summary. If the csv file has multiple columns, you can then specify the names of the columns to use: ```bash --text_column text_column_name \ --summary_column summary_column_name \ ``` For example if the columns were: ```csv id,date,text,summary ``` and you wanted to select only `text` and `summary`, then you'd pass these additional arguments: ```bash --text_column text \ --summary_column summary \ ``` #### Custom JSONLINES Files The second supported format is jsonlines. Here is an example of a jsonlines custom data file. ```json {"text": "I'm sitting here in a boring room. It's just another rainy Sunday afternoon. I'm wasting my time I got nothing to do. I'm hanging around I'm waiting for you. But nothing ever happens. And I wonder", "summary": "I'm sitting in a room where I'm waiting for something to happen"} {"text": "I see trees so green, red roses too. I see them bloom for me and you. And I think to myself what a wonderful world. I see skies so blue and clouds so white. The bright blessed day, the dark sacred night. And I think to myself what a wonderful world.", "summary": "I'm a gardener and I'm a big fan of flowers."} {"text": "Christmas time is here. Happiness and cheer. Fun for all that children call. Their favorite time of the year. Snowflakes in the air. Carols everywhere. Olden times and ancient rhymes. Of love and dreams to share", "summary": "It's that time of year again."} ``` Same as with the CSV files, by default the first value will be used as the text record and the second as the summary record. Therefore you can use any key names for the entries, in this example `text` and `summary` were used. And as with the CSV files, you can specify which values to select from the file, by explicitly specifying the corresponding key names. In our example this again would be: ```bash --text_column text \ --summary_column summary \ ``` ## With Accelerate Based on the script [`run_summarization_no_trainer.py`](https://github.com/huggingface/transformers/blob/main/examples/pytorch/summarization/run_summarization_no_trainer.py). Like `run_summarization.py`, this script allows you to fine-tune any of the models supported on a summarization task, the main difference is that this script exposes the bare training loop, to allow you to quickly experiment and add any customization you would like. It offers less options than the script with `Trainer` (for instance you can easily change the options for the optimizer or the dataloaders directly in the script) but still run in a distributed setup, on TPU and supports mixed precision by the mean of the [🤗 `Accelerate`](https://github.com/huggingface/accelerate) library. You can use the script normally after installing it: ```bash pip install git+https://github.com/huggingface/accelerate ``` then ```bash python run_summarization_no_trainer.py \ --model_name_or_path google-t5/t5-small \ --dataset_name cnn_dailymail \ --dataset_config "3.0.0" \ --source_prefix "summarize: " \ --output_dir ~/tmp/tst-summarization ``` You can then use your usual launchers to run in it in a distributed environment, but the easiest way is to run ```bash accelerate config ``` and reply to the questions asked. Then ```bash accelerate test ``` that will check everything is ready for training. Finally, you can launch training with ```bash accelerate launch run_summarization_no_trainer.py \ --model_name_or_path google-t5/t5-small \ --dataset_name cnn_dailymail \ --dataset_config "3.0.0" \ --source_prefix "summarize: " \ --output_dir ~/tmp/tst-summarization ``` This command is the same and will work for: - a CPU-only setup - a setup with one GPU - a distributed training with several GPUs (single or multi node) - a training on TPUs Note that this library is in alpha release so your feedback is more than welcome if you encounter any problem using it.

transformers/examples/pytorch/summarization/README.md/0

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# Token classification ## PyTorch version Fine-tuning the library models for token classification task such as Named Entity Recognition (NER), Parts-of-speech tagging (POS) or phrase extraction (CHUNKS). The main scrip `run_ner.py` leverages the 🤗 Datasets library and the Trainer API. You can easily customize it to your needs if you need extra processing on your datasets. It will either run on a datasets hosted on our [hub](https://huggingface.co/datasets) or with your own text files for training and validation, you might just need to add some tweaks in the data preprocessing. The following example fine-tunes BERT on CoNLL-2003: ```bash python run_ner.py \ --model_name_or_path google-bert/bert-base-uncased \ --dataset_name conll2003 \ --output_dir /tmp/test-ner \ --do_train \ --do_eval ``` or just can just run the bash script `run.sh`. To run on your own training and validation files, use the following command: ```bash python run_ner.py \ --model_name_or_path google-bert/bert-base-uncased \ --train_file path_to_train_file \ --validation_file path_to_validation_file \ --output_dir /tmp/test-ner \ --do_train \ --do_eval ``` **Note:** This script only works with models that have a fast tokenizer (backed by the 🤗 Tokenizers library) as it uses special features of those tokenizers. You can check if your favorite model has a fast tokenizer in [this table](https://huggingface.co/transformers/index.html#supported-frameworks), if it doesn't you can still use the old version of the script. > If your model classification head dimensions do not fit the number of labels in the dataset, you can specify `--ignore_mismatched_sizes` to adapt it. ## Old version of the script You can find the old version of the PyTorch script [here](https://github.com/huggingface/transformers/blob/main/examples/legacy/token-classification/run_ner.py). ## Pytorch version, no Trainer Based on the script [run_ner_no_trainer.py](https://github.com/huggingface/transformers/blob/main/examples/pytorch/token-classification/run_ner_no_trainer.py). Like `run_ner.py`, this script allows you to fine-tune any of the models on the [hub](https://huggingface.co/models) on a token classification task, either NER, POS or CHUNKS tasks or your own data in a csv or a JSON file. The main difference is that this script exposes the bare training loop, to allow you to quickly experiment and add any customization you would like. It offers less options than the script with `Trainer` (for instance you can easily change the options for the optimizer or the dataloaders directly in the script) but still run in a distributed setup, on TPU and supports mixed precision by the mean of the [🤗 `Accelerate`](https://github.com/huggingface/accelerate) library. You can use the script normally after installing it: ```bash pip install git+https://github.com/huggingface/accelerate ``` then ```bash export TASK_NAME=ner python run_ner_no_trainer.py \ --model_name_or_path google-bert/bert-base-cased \ --dataset_name conll2003 \ --task_name $TASK_NAME \ --max_length 128 \ --per_device_train_batch_size 32 \ --learning_rate 2e-5 \ --num_train_epochs 3 \ --output_dir /tmp/$TASK_NAME/ ``` You can then use your usual launchers to run in it in a distributed environment, but the easiest way is to run ```bash accelerate config ``` and reply to the questions asked. Then ```bash accelerate test ``` that will check everything is ready for training. Finally, you can launch training with ```bash export TASK_NAME=ner accelerate launch run_ner_no_trainer.py \ --model_name_or_path google-bert/bert-base-cased \ --dataset_name conll2003 \ --task_name $TASK_NAME \ --max_length 128 \ --per_device_train_batch_size 32 \ --learning_rate 2e-5 \ --num_train_epochs 3 \ --output_dir /tmp/$TASK_NAME/ ``` This command is the same and will work for: - a CPU-only setup - a setup with one GPU - a distributed training with several GPUs (single or multi node) - a training on TPUs Note that this library is in alpha release so your feedback is more than welcome if you encounter any problem using it.

transformers/examples/pytorch/token-classification/README.md/0

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# Patience-based Early Exit Patience-based Early Exit (PABEE) is a plug-and-play inference method for pretrained language models. We have already implemented it on BERT and ALBERT. Basically, you can make your LM faster and more robust with PABEE. It can even improve the performance of ALBERT on GLUE. The only sacrifice is that the batch size can only be 1. Learn more in the paper ["BERT Loses Patience: Fast and Robust Inference with Early Exit"](https://arxiv.org/abs/2006.04152) and the official [GitHub repo](https://github.com/JetRunner/PABEE). ![PABEE](https://github.com/JetRunner/PABEE/raw/master/bert-loses-patience.png) ## Training You can fine-tune a pretrained language model (you can choose from BERT and ALBERT) and train the internal classifiers by: ```bash export GLUE_DIR=/path/to/glue_data export TASK_NAME=MRPC python ./run_glue_with_pabee.py \ --model_type albert \ --model_name_or_path google-bert/bert-base-uncased/albert/albert-base-v2 \ --task_name $TASK_NAME \ --do_train \ --do_eval \ --do_lower_case \ --data_dir "$GLUE_DIR/$TASK_NAME" \ --max_seq_length 128 \ --per_gpu_train_batch_size 32 \ --per_gpu_eval_batch_size 32 \ --learning_rate 2e-5 \ --save_steps 50 \ --logging_steps 50 \ --num_train_epochs 5 \ --output_dir /path/to/save/ \ --evaluate_during_training ``` ## Inference You can inference with different patience settings by: ```bash export GLUE_DIR=/path/to/glue_data export TASK_NAME=MRPC python ./run_glue_with_pabee.py \ --model_type albert \ --model_name_or_path /path/to/save/ \ --task_name $TASK_NAME \ --do_eval \ --do_lower_case \ --data_dir "$GLUE_DIR/$TASK_NAME" \ --max_seq_length 128 \ --per_gpu_eval_batch_size 1 \ --learning_rate 2e-5 \ --logging_steps 50 \ --num_train_epochs 15 \ --output_dir /path/to/save/ \ --eval_all_checkpoints \ --patience 3,4,5,6,7,8 ``` where `patience` can be a list of patience settings, separated by a comma. It will help determine which patience works best. When evaluating on a regression task (STS-B), you may add `--regression_threshold 0.1` to define the regression threshold. ## Results On the GLUE dev set: | Model | \#Param | Speed | CoLA | MNLI | MRPC | QNLI | QQP | RTE | SST\-2 | STS\-B | |--------------|---------|--------|-------|-------|-------|-------|-------|-------|--------|--------| | ALBERT\-base | 12M | | 58\.9 | 84\.6 | 89\.5 | 91\.7 | 89\.6 | 78\.6 | 92\.8 | 89\.5 | | \+PABEE | 12M | 1\.57x | 61\.2 | 85\.1 | 90\.0 | 91\.8 | 89\.6 | 80\.1 | 93\.0 | 90\.1 | | Model | \#Param | Speed\-up | MNLI | SST\-2 | STS\-B | |---------------|---------|-----------|-------|--------|--------| | BERT\-base | 108M | | 84\.5 | 92\.1 | 88\.9 | | \+PABEE | 108M | 1\.62x | 83\.6 | 92\.0 | 88\.7 | | ALBERT\-large | 18M | | 86\.4 | 94\.9 | 90\.4 | | \+PABEE | 18M | 2\.42x | 86\.8 | 95\.2 | 90\.6 | ## Citation If you find this resource useful, please consider citing the following paper: ```bibtex @misc{zhou2020bert, title={BERT Loses Patience: Fast and Robust Inference with Early Exit}, author={Wangchunshu Zhou and Canwen Xu and Tao Ge and Julian McAuley and Ke Xu and Furu Wei}, year={2020}, eprint={2006.04152}, archivePrefix={arXiv}, primaryClass={cs.CL} } ```

transformers/examples/research_projects/bert-loses-patience/README.md/0

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# coding=utf-8 # Copyright 2019-present, the HuggingFace Inc. team and Facebook, Inc. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. """ The distiller to distil the student. Adapted in part from Facebook, Inc XLM model (https://github.com/facebookresearch/XLM) """ import math import os import time import psutil import torch from grouped_batch_sampler import GroupedBatchSampler, create_lengths_groups from lm_seqs_dataset import LmSeqsDataset from torch import nn from torch.optim import AdamW from torch.utils.data import BatchSampler, DataLoader, RandomSampler from torch.utils.data.distributed import DistributedSampler from tqdm import tqdm from transformers import get_linear_schedule_with_warmup from utils import logger try: from torch.utils.tensorboard import SummaryWriter except ImportError: from tensorboardX import SummaryWriter class Distiller: def __init__( self, params: dict, dataset: LmSeqsDataset, token_probs: torch.tensor, student: nn.Module, teacher: nn.Module ): logger.info("Initializing Distiller") self.params = params self.dump_path = params.dump_path self.multi_gpu = params.multi_gpu self.fp16 = params.fp16 self.student = student self.teacher = teacher self.student_config = student.config self.vocab_size = student.config.vocab_size if params.n_gpu <= 1: sampler = RandomSampler(dataset) else: sampler = DistributedSampler(dataset) if params.group_by_size: groups = create_lengths_groups(lengths=dataset.lengths, k=params.max_model_input_size) sampler = GroupedBatchSampler(sampler=sampler, group_ids=groups, batch_size=params.batch_size) else: sampler = BatchSampler(sampler=sampler, batch_size=params.batch_size, drop_last=False) self.dataloader = DataLoader(dataset=dataset, batch_sampler=sampler, collate_fn=dataset.batch_sequences) self.temperature = params.temperature assert self.temperature > 0.0 self.alpha_ce = params.alpha_ce self.alpha_mlm = params.alpha_mlm self.alpha_clm = params.alpha_clm self.alpha_mse = params.alpha_mse self.alpha_cos = params.alpha_cos self.mlm = params.mlm if self.mlm: logger.info("Using MLM loss for LM step.") self.mlm_mask_prop = params.mlm_mask_prop assert 0.0 <= self.mlm_mask_prop <= 1.0 assert params.word_mask + params.word_keep + params.word_rand == 1.0 self.pred_probs = torch.FloatTensor([params.word_mask, params.word_keep, params.word_rand]) self.pred_probs = self.pred_probs.to(f"cuda:{params.local_rank}") if params.n_gpu > 0 else self.pred_probs self.token_probs = token_probs.to(f"cuda:{params.local_rank}") if params.n_gpu > 0 else token_probs if self.fp16: self.pred_probs = self.pred_probs.half() self.token_probs = self.token_probs.half() else: logger.info("Using CLM loss for LM step.") self.epoch = 0 self.n_iter = 0 self.n_total_iter = 0 self.n_sequences_epoch = 0 self.total_loss_epoch = 0 self.last_loss = 0 self.last_loss_ce = 0 self.last_loss_mlm = 0 self.last_loss_clm = 0 if self.alpha_mse > 0.0: self.last_loss_mse = 0 if self.alpha_cos > 0.0: self.last_loss_cos = 0 self.last_log = 0 self.ce_loss_fct = nn.KLDivLoss(reduction="batchmean") self.lm_loss_fct = nn.CrossEntropyLoss(ignore_index=-100) if self.alpha_mse > 0.0: self.mse_loss_fct = nn.MSELoss(reduction="sum") if self.alpha_cos > 0.0: self.cosine_loss_fct = nn.CosineEmbeddingLoss(reduction="mean") logger.info("--- Initializing model optimizer") assert params.gradient_accumulation_steps >= 1 self.num_steps_epoch = len(self.dataloader) num_train_optimization_steps = ( int(self.num_steps_epoch / params.gradient_accumulation_steps * params.n_epoch) + 1 ) no_decay = ["bias", "LayerNorm.weight"] optimizer_grouped_parameters = [ { "params": [ p for n, p in student.named_parameters() if not any(nd in n for nd in no_decay) and p.requires_grad ], "weight_decay": params.weight_decay, }, { "params": [ p for n, p in student.named_parameters() if any(nd in n for nd in no_decay) and p.requires_grad ], "weight_decay": 0.0, }, ] logger.info( "------ Number of trainable parameters (student): %i" % sum([p.numel() for p in self.student.parameters() if p.requires_grad]) ) logger.info("------ Number of parameters (student): %i" % sum([p.numel() for p in self.student.parameters()])) self.optimizer = AdamW( optimizer_grouped_parameters, lr=params.learning_rate, eps=params.adam_epsilon, betas=(0.9, 0.98) ) warmup_steps = math.ceil(num_train_optimization_steps * params.warmup_prop) self.scheduler = get_linear_schedule_with_warmup( self.optimizer, num_warmup_steps=warmup_steps, num_training_steps=num_train_optimization_steps ) if self.fp16: try: from apex import amp except ImportError: raise ImportError("Please install apex from https://www.github.com/nvidia/apex to use fp16 training.") logger.info(f"Using fp16 training: {self.params.fp16_opt_level} level") self.student, self.optimizer = amp.initialize( self.student, self.optimizer, opt_level=self.params.fp16_opt_level ) self.teacher = self.teacher.half() if self.multi_gpu: if self.fp16: from apex.parallel import DistributedDataParallel logger.info("Using apex.parallel.DistributedDataParallel for distributed training.") self.student = DistributedDataParallel(self.student) else: from torch.nn.parallel import DistributedDataParallel logger.info("Using nn.parallel.DistributedDataParallel for distributed training.") self.student = DistributedDataParallel( self.student, device_ids=[params.local_rank], output_device=params.local_rank, find_unused_parameters=True, ) self.is_master = params.is_master if self.is_master: logger.info("--- Initializing Tensorboard") self.tensorboard = SummaryWriter(log_dir=os.path.join(self.dump_path, "log", "train")) self.tensorboard.add_text(tag="config/training", text_string=str(self.params), global_step=0) self.tensorboard.add_text(tag="config/student", text_string=str(self.student_config), global_step=0) def prepare_batch_mlm(self, batch): """ Prepare the batch: from the token_ids and the lengths, compute the attention mask and the masked label for MLM. Input: ------ batch: `Tuple` token_ids: `torch.tensor(bs, seq_length)` - The token ids for each of the sequence. It is padded. lengths: `torch.tensor(bs)` - The lengths of each of the sequences in the batch. Output: ------- token_ids: `torch.tensor(bs, seq_length)` - The token ids after the modifications for MLM. attn_mask: `torch.tensor(bs, seq_length)` - The attention mask for the self-attention. mlm_labels: `torch.tensor(bs, seq_length)` - The masked language modeling labels. There is a -100 where there is nothing to predict. """ token_ids, lengths = batch token_ids, lengths = self.round_batch(x=token_ids, lengths=lengths) assert token_ids.size(0) == lengths.size(0) attn_mask = torch.arange(token_ids.size(1), dtype=torch.long, device=lengths.device) < lengths[:, None] bs, max_seq_len = token_ids.size() mlm_labels = token_ids.new(token_ids.size()).copy_(token_ids) x_prob = self.token_probs[token_ids.flatten()] n_tgt = math.ceil(self.mlm_mask_prop * lengths.sum().item()) tgt_ids = torch.multinomial(x_prob / x_prob.sum(), n_tgt, replacement=False) pred_mask = torch.zeros( bs * max_seq_len, dtype=torch.bool, device=token_ids.device ) # previously `dtype=torch.uint8`, cf pytorch 1.2.0 compatibility pred_mask[tgt_ids] = 1 pred_mask = pred_mask.view(bs, max_seq_len) pred_mask[token_ids == self.params.special_tok_ids["pad_token"]] = 0 # mask a number of words == 0 [8] (faster with fp16) if self.fp16: n1 = pred_mask.sum().item() if n1 > 8: pred_mask = pred_mask.view(-1) n2 = max(n1 % 8, 8 * (n1 // 8)) if n2 != n1: pred_mask[torch.nonzero(pred_mask).view(-1)[: n1 - n2]] = 0 pred_mask = pred_mask.view(bs, max_seq_len) assert pred_mask.sum().item() % 8 == 0, pred_mask.sum().item() _token_ids_real = token_ids[pred_mask] _token_ids_rand = _token_ids_real.clone().random_(self.vocab_size) _token_ids_mask = _token_ids_real.clone().fill_(self.params.special_tok_ids["mask_token"]) probs = torch.multinomial(self.pred_probs, len(_token_ids_real), replacement=True) _token_ids = ( _token_ids_mask * (probs == 0).long() + _token_ids_real * (probs == 1).long() + _token_ids_rand * (probs == 2).long() ) token_ids = token_ids.masked_scatter(pred_mask, _token_ids) mlm_labels[~pred_mask] = -100 # previously `mlm_labels[1-pred_mask] = -1`, cf pytorch 1.2.0 compatibility # sanity checks assert 0 <= token_ids.min() <= token_ids.max() < self.vocab_size return token_ids, attn_mask, mlm_labels def prepare_batch_clm(self, batch): """ Prepare the batch: from the token_ids and the lengths, compute the attention mask and the labels for CLM. Input: ------ batch: `Tuple` token_ids: `torch.tensor(bs, seq_length)` - The token ids for each of the sequence. It is padded. lengths: `torch.tensor(bs)` - The lengths of each of the sequences in the batch. Output: ------- token_ids: `torch.tensor(bs, seq_length)` - The token ids after the modifications for MLM. attn_mask: `torch.tensor(bs, seq_length)` - The attention mask for the self-attention. clm_labels: `torch.tensor(bs, seq_length)` - The causal language modeling labels. There is a -100 where there is nothing to predict. """ token_ids, lengths = batch token_ids, lengths = self.round_batch(x=token_ids, lengths=lengths) assert token_ids.size(0) == lengths.size(0) attn_mask = torch.arange(token_ids.size(1), dtype=torch.long, device=lengths.device) < lengths[:, None] clm_labels = token_ids.new(token_ids.size()).copy_(token_ids) clm_labels[~attn_mask] = -100 # previously `clm_labels[1-attn_mask] = -1`, cf pytorch 1.2.0 compatibility # sanity checks assert 0 <= token_ids.min() <= token_ids.max() < self.vocab_size return token_ids, attn_mask, clm_labels def round_batch(self, x: torch.tensor, lengths: torch.tensor): """ For float16 only. Sub-sample sentences in a batch, and add padding, so that each dimension is a multiple of 8. Input: ------ x: `torch.tensor(bs, seq_length)` - The token ids. lengths: `torch.tensor(bs, seq_length)` - The lengths of each of the sequence in the batch. Output: ------- x: `torch.tensor(new_bs, new_seq_length)` - The updated token ids. lengths: `torch.tensor(new_bs, new_seq_length)` - The updated lengths. """ if not self.fp16 or len(lengths) < 8: return x, lengths # number of sentences == 0 [8] bs1 = len(lengths) bs2 = 8 * (bs1 // 8) assert bs2 > 0 and bs2 % 8 == 0 if bs1 != bs2: idx = torch.randperm(bs1)[:bs2] lengths = lengths[idx] slen = lengths.max().item() x = x[idx, :slen] else: idx = None # sequence length == 0 [8] ml1 = x.size(1) if ml1 % 8 != 0: pad = 8 - (ml1 % 8) ml2 = ml1 + pad if self.mlm: pad_id = self.params.special_tok_ids["pad_token"] else: pad_id = self.params.special_tok_ids["unk_token"] padding_tensor = torch.zeros(bs2, pad, dtype=torch.long, device=x.device).fill_(pad_id) x = torch.cat([x, padding_tensor], 1) assert x.size() == (bs2, ml2) assert x.size(0) % 8 == 0 assert x.size(1) % 8 == 0 return x, lengths def train(self): """ The real training loop. """ if self.is_master: logger.info("Starting training") self.last_log = time.time() self.student.train() self.teacher.eval() for _ in range(self.params.n_epoch): if self.is_master: logger.info(f"--- Starting epoch {self.epoch}/{self.params.n_epoch-1}") if self.multi_gpu: torch.distributed.barrier() iter_bar = tqdm(self.dataloader, desc="-Iter", disable=self.params.local_rank not in [-1, 0]) for batch in iter_bar: if self.params.n_gpu > 0: batch = tuple(t.to(f"cuda:{self.params.local_rank}") for t in batch) if self.mlm: token_ids, attn_mask, lm_labels = self.prepare_batch_mlm(batch=batch) else: token_ids, attn_mask, lm_labels = self.prepare_batch_clm(batch=batch) self.step(input_ids=token_ids, attention_mask=attn_mask, lm_labels=lm_labels) iter_bar.update() iter_bar.set_postfix( {"Last_loss": f"{self.last_loss:.2f}", "Avg_cum_loss": f"{self.total_loss_epoch/self.n_iter:.2f}"} ) iter_bar.close() if self.is_master: logger.info(f"--- Ending epoch {self.epoch}/{self.params.n_epoch-1}") self.end_epoch() if self.is_master: logger.info("Save very last checkpoint as `pytorch_model.bin`.") self.save_checkpoint(checkpoint_name="pytorch_model.bin") logger.info("Training is finished") def step(self, input_ids: torch.tensor, attention_mask: torch.tensor, lm_labels: torch.tensor): """ One optimization step: forward of student AND teacher, backward on the loss (for gradient accumulation), and possibly a parameter update (depending on the gradient accumulation). Input: ------ input_ids: `torch.tensor(bs, seq_length)` - The token ids. attention_mask: `torch.tensor(bs, seq_length)` - The attention mask for self attention. lm_labels: `torch.tensor(bs, seq_length)` - The language modeling labels (mlm labels for MLM and clm labels for CLM). """ if self.mlm: student_outputs = self.student( input_ids=input_ids, attention_mask=attention_mask ) # (bs, seq_length, voc_size) with torch.no_grad(): teacher_outputs = self.teacher( input_ids=input_ids, attention_mask=attention_mask ) # (bs, seq_length, voc_size) else: student_outputs = self.student(input_ids=input_ids, attention_mask=None) # (bs, seq_length, voc_size) with torch.no_grad(): teacher_outputs = self.teacher(input_ids=input_ids, attention_mask=None) # (bs, seq_length, voc_size) s_logits, s_hidden_states = student_outputs["logits"], student_outputs["hidden_states"] t_logits, t_hidden_states = teacher_outputs["logits"], teacher_outputs["hidden_states"] assert s_logits.size() == t_logits.size() # https://github.com/peterliht/knowledge-distillation-pytorch/blob/master/model/net.py#L100 # https://github.com/peterliht/knowledge-distillation-pytorch/issues/2 if self.params.restrict_ce_to_mask: mask = (lm_labels > -1).unsqueeze(-1).expand_as(s_logits) # (bs, seq_length, voc_size) else: mask = attention_mask.unsqueeze(-1).expand_as(s_logits) # (bs, seq_length, voc_size) s_logits_slct = torch.masked_select(s_logits, mask) # (bs * seq_length * voc_size) modulo the 1s in mask s_logits_slct = s_logits_slct.view(-1, s_logits.size(-1)) # (bs * seq_length, voc_size) modulo the 1s in mask t_logits_slct = torch.masked_select(t_logits, mask) # (bs * seq_length * voc_size) modulo the 1s in mask t_logits_slct = t_logits_slct.view(-1, s_logits.size(-1)) # (bs * seq_length, voc_size) modulo the 1s in mask assert t_logits_slct.size() == s_logits_slct.size() loss_ce = ( self.ce_loss_fct( nn.functional.log_softmax(s_logits_slct / self.temperature, dim=-1), nn.functional.softmax(t_logits_slct / self.temperature, dim=-1), ) * (self.temperature) ** 2 ) loss = self.alpha_ce * loss_ce if self.alpha_mlm > 0.0: loss_mlm = self.lm_loss_fct(s_logits.view(-1, s_logits.size(-1)), lm_labels.view(-1)) loss += self.alpha_mlm * loss_mlm if self.alpha_clm > 0.0: shift_logits = s_logits[..., :-1, :].contiguous() shift_labels = lm_labels[..., 1:].contiguous() loss_clm = self.lm_loss_fct(shift_logits.view(-1, shift_logits.size(-1)), shift_labels.view(-1)) loss += self.alpha_clm * loss_clm if self.alpha_mse > 0.0: loss_mse = self.mse_loss_fct(s_logits_slct, t_logits_slct) / s_logits_slct.size( 0 ) # Reproducing batchmean reduction loss += self.alpha_mse * loss_mse if self.alpha_cos > 0.0: s_hidden_states = s_hidden_states[-1] # (bs, seq_length, dim) t_hidden_states = t_hidden_states[-1] # (bs, seq_length, dim) mask = attention_mask.unsqueeze(-1).expand_as(s_hidden_states) # (bs, seq_length, dim) assert s_hidden_states.size() == t_hidden_states.size() dim = s_hidden_states.size(-1) s_hidden_states_slct = torch.masked_select(s_hidden_states, mask) # (bs * seq_length * dim) s_hidden_states_slct = s_hidden_states_slct.view(-1, dim) # (bs * seq_length, dim) t_hidden_states_slct = torch.masked_select(t_hidden_states, mask) # (bs * seq_length * dim) t_hidden_states_slct = t_hidden_states_slct.view(-1, dim) # (bs * seq_length, dim) target = s_hidden_states_slct.new(s_hidden_states_slct.size(0)).fill_(1) # (bs * seq_length,) loss_cos = self.cosine_loss_fct(s_hidden_states_slct, t_hidden_states_slct, target) loss += self.alpha_cos * loss_cos self.total_loss_epoch += loss.item() self.last_loss = loss.item() self.last_loss_ce = loss_ce.item() if self.alpha_mlm > 0.0: self.last_loss_mlm = loss_mlm.item() if self.alpha_clm > 0.0: self.last_loss_clm = loss_clm.item() if self.alpha_mse > 0.0: self.last_loss_mse = loss_mse.item() if self.alpha_cos > 0.0: self.last_loss_cos = loss_cos.item() self.optimize(loss) self.n_sequences_epoch += input_ids.size(0) def optimize(self, loss): """ Normalization on the loss (gradient accumulation or distributed training), followed by backward pass on the loss, possibly followed by a parameter update (depending on the gradient accumulation). Also update the metrics for tensorboard. """ # Check for NaN if (loss != loss).data.any(): logger.error("NaN detected") exit() if self.multi_gpu: loss = loss.mean() if self.params.gradient_accumulation_steps > 1: loss = loss / self.params.gradient_accumulation_steps if self.fp16: from apex import amp with amp.scale_loss(loss, self.optimizer) as scaled_loss: scaled_loss.backward() else: loss.backward() self.iter() if self.n_iter % self.params.gradient_accumulation_steps == 0: if self.fp16: nn.utils.clip_grad_norm_(amp.master_params(self.optimizer), self.params.max_grad_norm) else: nn.utils.clip_grad_norm_(self.student.parameters(), self.params.max_grad_norm) self.optimizer.step() self.optimizer.zero_grad() self.scheduler.step() def iter(self): """ Update global counts, write to tensorboard and save checkpoint. """ self.n_iter += 1 self.n_total_iter += 1 if self.n_total_iter % self.params.log_interval == 0: self.log_tensorboard() self.last_log = time.time() if self.n_total_iter % self.params.checkpoint_interval == 0: self.save_checkpoint() def log_tensorboard(self): """ Log into tensorboard. Only by the master process. """ if not self.is_master: return for param_name, param in self.student.named_parameters(): self.tensorboard.add_scalar( tag="parameter_mean/" + param_name, scalar_value=param.data.mean(), global_step=self.n_total_iter ) self.tensorboard.add_scalar( tag="parameter_std/" + param_name, scalar_value=param.data.std(), global_step=self.n_total_iter ) if param.grad is None: continue self.tensorboard.add_scalar( tag="grad_mean/" + param_name, scalar_value=param.grad.data.mean(), global_step=self.n_total_iter ) self.tensorboard.add_scalar( tag="grad_std/" + param_name, scalar_value=param.grad.data.std(), global_step=self.n_total_iter ) self.tensorboard.add_scalar( tag="losses/cum_avg_loss_epoch", scalar_value=self.total_loss_epoch / self.n_iter, global_step=self.n_total_iter, ) self.tensorboard.add_scalar(tag="losses/loss", scalar_value=self.last_loss, global_step=self.n_total_iter) self.tensorboard.add_scalar( tag="losses/loss_ce", scalar_value=self.last_loss_ce, global_step=self.n_total_iter ) if self.alpha_mlm > 0.0: self.tensorboard.add_scalar( tag="losses/loss_mlm", scalar_value=self.last_loss_mlm, global_step=self.n_total_iter ) if self.alpha_clm > 0.0: self.tensorboard.add_scalar( tag="losses/loss_clm", scalar_value=self.last_loss_clm, global_step=self.n_total_iter ) if self.alpha_mse > 0.0: self.tensorboard.add_scalar( tag="losses/loss_mse", scalar_value=self.last_loss_mse, global_step=self.n_total_iter ) if self.alpha_cos > 0.0: self.tensorboard.add_scalar( tag="losses/loss_cos", scalar_value=self.last_loss_cos, global_step=self.n_total_iter ) self.tensorboard.add_scalar( tag="learning_rate/lr", scalar_value=self.scheduler.get_lr()[0], global_step=self.n_total_iter ) self.tensorboard.add_scalar( tag="global/memory_usage", scalar_value=psutil.virtual_memory()._asdict()["used"] / 1_000_000, global_step=self.n_total_iter, ) self.tensorboard.add_scalar( tag="global/speed", scalar_value=time.time() - self.last_log, global_step=self.n_total_iter ) def end_epoch(self): """ Finally arrived at the end of epoch (full pass on dataset). Do some tensorboard logging and checkpoint saving. """ logger.info(f"{self.n_sequences_epoch} sequences have been trained during this epoch.") if self.is_master: self.save_checkpoint(checkpoint_name=f"model_epoch_{self.epoch}.pth") self.tensorboard.add_scalar( tag="epoch/loss", scalar_value=self.total_loss_epoch / self.n_iter, global_step=self.epoch ) self.epoch += 1 self.n_sequences_epoch = 0 self.n_iter = 0 self.total_loss_epoch = 0 def save_checkpoint(self, checkpoint_name: str = "checkpoint.pth"): """ Save the current state. Only by the master process. """ if not self.is_master: return mdl_to_save = self.student.module if hasattr(self.student, "module") else self.student mdl_to_save.config.save_pretrained(self.dump_path) state_dict = mdl_to_save.state_dict() torch.save(state_dict, os.path.join(self.dump_path, checkpoint_name))

transformers/examples/research_projects/distillation/distiller.py/0

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<p align="center"> <img src="http://sayef.tech:8082/uploads/FSNER-LOGO-2.png" alt="FSNER LOGO"> </p> <p align="center"> Implemented by <a href="https://huggingface.co/sayef"> sayef </a>. </p> ## Overview The FSNER model was proposed in [Example-Based Named Entity Recognition](https://arxiv.org/abs/2008.10570) by Morteza Ziyadi, Yuting Sun, Abhishek Goswami, Jade Huang, Weizhu Chen. To identify entity spans in a new domain, it uses a train-free few-shot learning approach inspired by question-answering. ## Abstract ---- > We present a novel approach to named entity recognition (NER) in the presence of scarce data that we call example-based NER. Our train-free few-shot learning approach takes inspiration from question-answering to identify entity spans in a new and unseen domain. In comparison with the current state-of-the-art, the proposed method performs significantly better, especially when using a low number of support examples. ## Model Training Details ----- | identifier | epochs | datasets | | ---------- |:----------:| :-----:| | [sayef/fsner-bert-base-uncased](https://huggingface.co/sayef/fsner-bert-base-uncased) | 10 | ontonotes5, conll2003, wnut2017, and fin (Alvarado et al.). | ## Installation and Example Usage ------ You can use the FSNER model in 3 ways: 1. Install directly from PyPI: `pip install fsner` and import the model as shown in the code example below or 2. Install from source: `python setup.py install` and import the model as shown in the code example below or 3. Clone repo and change directory to `src` and import the model as shown in the code example below ```python from fsner import FSNERModel, FSNERTokenizerUtils model = FSNERModel("sayef/fsner-bert-base-uncased") tokenizer = FSNERTokenizerUtils("sayef/fsner-bert-base-uncased") # size of query and supports must be the same. If you want to find all the entitites in one particular query, just repeat the same query n times where n is equal to the number of supports (or entities). query = [ 'KWE 4000 can reach with a maximum speed from up to 450 P/min an accuracy from 50 mg', 'I would like to order a computer from eBay.', ] # each list in supports are the examples of one entity type # wrap entities around with [E] and [/E] in the examples supports = [ [ 'Horizontal flow wrapper [E] Pack 403 [/E] features the new retrofit-kit „paper-ON-form“', '[E] Paloma Pick-and-Place-Roboter [/E] arranges the bakery products for the downstream tray-forming equipment', 'Finally, the new [E] Kliklok ACE [/E] carton former forms cartons and trays without the use of glue', 'We set up our pilot plant with the right [E] FibreForm® [/E] configuration to make prototypes for your marketing tests and package validation', 'The [E] CAR-T5 [/E] is a reliable, purely mechanically driven cartoning machine for versatile application fields' ], [ "[E] Walmart [/E] is a leading e-commerce company", "I recently ordered a book from [E] Amazon [/E]", "I ordered this from [E] ShopClues [/E]", "[E] Flipkart [/E] started it's journey from zero" ] ] device = 'cpu' W_query = tokenizer.tokenize(query).to(device) W_supports = tokenizer.tokenize(supports).to(device) start_prob, end_prob = model(W_query, W_supports) output = tokenizer.extract_entity_from_scores(query, W_query, start_prob, end_prob, thresh=0.50) print(output) ```

transformers/examples/research_projects/fsner/README.md/0

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import json import os from dataclasses import dataclass from functools import partial from typing import Callable import flax.linen as nn import jax import jax.numpy as jnp import joblib import optax import wandb from flax import jax_utils, struct, traverse_util from flax.serialization import from_bytes, to_bytes from flax.training import train_state from flax.training.common_utils import shard from tqdm.auto import tqdm from transformers import BigBirdConfig, FlaxBigBirdForQuestionAnswering from transformers.models.big_bird.modeling_flax_big_bird import FlaxBigBirdForQuestionAnsweringModule class FlaxBigBirdForNaturalQuestionsModule(FlaxBigBirdForQuestionAnsweringModule): """ BigBirdForQuestionAnswering with CLS Head over the top for predicting category This way we can load its weights with FlaxBigBirdForQuestionAnswering """ config: BigBirdConfig dtype: jnp.dtype = jnp.float32 add_pooling_layer: bool = True def setup(self): super().setup() self.cls = nn.Dense(5, dtype=self.dtype) def __call__(self, *args, **kwargs): outputs = super().__call__(*args, **kwargs) cls_out = self.cls(outputs[2]) return outputs[:2] + (cls_out,) class FlaxBigBirdForNaturalQuestions(FlaxBigBirdForQuestionAnswering): module_class = FlaxBigBirdForNaturalQuestionsModule def calculate_loss_for_nq(start_logits, start_labels, end_logits, end_labels, pooled_logits, pooler_labels): def cross_entropy(logits, labels, reduction=None): """ Args: logits: bsz, seqlen, vocab_size labels: bsz, seqlen """ vocab_size = logits.shape[-1] labels = (labels[..., None] == jnp.arange(vocab_size)[None]).astype("f4") logits = jax.nn.log_softmax(logits, axis=-1) loss = -jnp.sum(labels * logits, axis=-1) if reduction is not None: loss = reduction(loss) return loss cross_entropy = partial(cross_entropy, reduction=jnp.mean) start_loss = cross_entropy(start_logits, start_labels) end_loss = cross_entropy(end_logits, end_labels) pooled_loss = cross_entropy(pooled_logits, pooler_labels) return (start_loss + end_loss + pooled_loss) / 3 @dataclass class Args: model_id: str = "google/bigbird-roberta-base" logging_steps: int = 3000 save_steps: int = 10500 block_size: int = 128 num_random_blocks: int = 3 batch_size_per_device: int = 1 max_epochs: int = 5 # tx_args lr: float = 3e-5 init_lr: float = 0.0 warmup_steps: int = 20000 weight_decay: float = 0.0095 save_dir: str = "bigbird-roberta-natural-questions" base_dir: str = "training-expt" tr_data_path: str = "data/nq-training.jsonl" val_data_path: str = "data/nq-validation.jsonl" def __post_init__(self): os.makedirs(self.base_dir, exist_ok=True) self.save_dir = os.path.join(self.base_dir, self.save_dir) self.batch_size = self.batch_size_per_device * jax.device_count() @dataclass class DataCollator: pad_id: int max_length: int = 4096 # no dynamic padding on TPUs def __call__(self, batch): batch = self.collate_fn(batch) batch = jax.tree_util.tree_map(shard, batch) return batch def collate_fn(self, features): input_ids, attention_mask = self.fetch_inputs(features["input_ids"]) batch = { "input_ids": jnp.array(input_ids, dtype=jnp.int32), "attention_mask": jnp.array(attention_mask, dtype=jnp.int32), "start_labels": jnp.array(features["start_token"], dtype=jnp.int32), "end_labels": jnp.array(features["end_token"], dtype=jnp.int32), "pooled_labels": jnp.array(features["category"], dtype=jnp.int32), } return batch def fetch_inputs(self, input_ids: list): inputs = [self._fetch_inputs(ids) for ids in input_ids] return zip(*inputs) def _fetch_inputs(self, input_ids: list): attention_mask = [1 for _ in range(len(input_ids))] while len(input_ids) < self.max_length: input_ids.append(self.pad_id) attention_mask.append(0) return input_ids, attention_mask def get_batched_dataset(dataset, batch_size, seed=None): if seed is not None: dataset = dataset.shuffle(seed=seed) for i in range(len(dataset) // batch_size): batch = dataset[i * batch_size : (i + 1) * batch_size] yield dict(batch) @partial(jax.pmap, axis_name="batch") def train_step(state, drp_rng, **model_inputs): def loss_fn(params): start_labels = model_inputs.pop("start_labels") end_labels = model_inputs.pop("end_labels") pooled_labels = model_inputs.pop("pooled_labels") outputs = state.apply_fn(**model_inputs, params=params, dropout_rng=drp_rng, train=True) start_logits, end_logits, pooled_logits = outputs return state.loss_fn( start_logits, start_labels, end_logits, end_labels, pooled_logits, pooled_labels, ) drp_rng, new_drp_rng = jax.random.split(drp_rng) grad_fn = jax.value_and_grad(loss_fn) loss, grads = grad_fn(state.params) metrics = jax.lax.pmean({"loss": loss}, axis_name="batch") grads = jax.lax.pmean(grads, "batch") state = state.apply_gradients(grads=grads) return state, metrics, new_drp_rng @partial(jax.pmap, axis_name="batch") def val_step(state, **model_inputs): start_labels = model_inputs.pop("start_labels") end_labels = model_inputs.pop("end_labels") pooled_labels = model_inputs.pop("pooled_labels") outputs = state.apply_fn(**model_inputs, params=state.params, train=False) start_logits, end_logits, pooled_logits = outputs loss = state.loss_fn(start_logits, start_labels, end_logits, end_labels, pooled_logits, pooled_labels) metrics = jax.lax.pmean({"loss": loss}, axis_name="batch") return metrics class TrainState(train_state.TrainState): loss_fn: Callable = struct.field(pytree_node=False) @dataclass class Trainer: args: Args data_collator: Callable train_step_fn: Callable val_step_fn: Callable model_save_fn: Callable logger: wandb scheduler_fn: Callable = None def create_state(self, model, tx, num_train_steps, ckpt_dir=None): params = model.params state = TrainState.create( apply_fn=model.__call__, params=params, tx=tx, loss_fn=calculate_loss_for_nq, ) if ckpt_dir is not None: params, opt_state, step, args, data_collator = restore_checkpoint(ckpt_dir, state) tx_args = { "lr": args.lr, "init_lr": args.init_lr, "warmup_steps": args.warmup_steps, "num_train_steps": num_train_steps, "weight_decay": args.weight_decay, } tx, lr = build_tx(**tx_args) state = train_state.TrainState( step=step, apply_fn=model.__call__, params=params, tx=tx, opt_state=opt_state, ) self.args = args self.data_collator = data_collator self.scheduler_fn = lr model.params = params state = jax_utils.replicate(state) return state def train(self, state, tr_dataset, val_dataset): args = self.args total = len(tr_dataset) // args.batch_size rng = jax.random.PRNGKey(0) drp_rng = jax.random.split(rng, jax.device_count()) for epoch in range(args.max_epochs): running_loss = jnp.array(0, dtype=jnp.float32) tr_dataloader = get_batched_dataset(tr_dataset, args.batch_size, seed=epoch) i = 0 for batch in tqdm(tr_dataloader, total=total, desc=f"Running EPOCH-{epoch}"): batch = self.data_collator(batch) state, metrics, drp_rng = self.train_step_fn(state, drp_rng, **batch) running_loss += jax_utils.unreplicate(metrics["loss"]) i += 1 if i % args.logging_steps == 0: state_step = jax_utils.unreplicate(state.step) tr_loss = running_loss.item() / i lr = self.scheduler_fn(state_step - 1) eval_loss = self.evaluate(state, val_dataset) logging_dict = { "step": state_step.item(), "eval_loss": eval_loss.item(), "tr_loss": tr_loss, "lr": lr.item(), } tqdm.write(str(logging_dict)) self.logger.log(logging_dict, commit=True) if i % args.save_steps == 0: self.save_checkpoint(args.save_dir + f"-e{epoch}-s{i}", state=state) def evaluate(self, state, dataset): dataloader = get_batched_dataset(dataset, self.args.batch_size) total = len(dataset) // self.args.batch_size running_loss = jnp.array(0, dtype=jnp.float32) i = 0 for batch in tqdm(dataloader, total=total, desc="Evaluating ... "): batch = self.data_collator(batch) metrics = self.val_step_fn(state, **batch) running_loss += jax_utils.unreplicate(metrics["loss"]) i += 1 return running_loss / i def save_checkpoint(self, save_dir, state): state = jax_utils.unreplicate(state) print(f"SAVING CHECKPOINT IN {save_dir}", end=" ... ") self.model_save_fn(save_dir, params=state.params) with open(os.path.join(save_dir, "opt_state.msgpack"), "wb") as f: f.write(to_bytes(state.opt_state)) joblib.dump(self.args, os.path.join(save_dir, "args.joblib")) joblib.dump(self.data_collator, os.path.join(save_dir, "data_collator.joblib")) with open(os.path.join(save_dir, "training_state.json"), "w") as f: json.dump({"step": state.step.item()}, f) print("DONE") def restore_checkpoint(save_dir, state): print(f"RESTORING CHECKPOINT FROM {save_dir}", end=" ... ") with open(os.path.join(save_dir, "flax_model.msgpack"), "rb") as f: params = from_bytes(state.params, f.read()) with open(os.path.join(save_dir, "opt_state.msgpack"), "rb") as f: opt_state = from_bytes(state.opt_state, f.read()) args = joblib.load(os.path.join(save_dir, "args.joblib")) data_collator = joblib.load(os.path.join(save_dir, "data_collator.joblib")) with open(os.path.join(save_dir, "training_state.json"), "r") as f: training_state = json.load(f) step = training_state["step"] print("DONE") return params, opt_state, step, args, data_collator def scheduler_fn(lr, init_lr, warmup_steps, num_train_steps): decay_steps = num_train_steps - warmup_steps warmup_fn = optax.linear_schedule(init_value=init_lr, end_value=lr, transition_steps=warmup_steps) decay_fn = optax.linear_schedule(init_value=lr, end_value=1e-7, transition_steps=decay_steps) lr = optax.join_schedules(schedules=[warmup_fn, decay_fn], boundaries=[warmup_steps]) return lr def build_tx(lr, init_lr, warmup_steps, num_train_steps, weight_decay): def weight_decay_mask(params): params = traverse_util.flatten_dict(params) mask = {k: (v[-1] != "bias" and v[-2:] != ("LayerNorm", "scale")) for k, v in params.items()} return traverse_util.unflatten_dict(mask) lr = scheduler_fn(lr, init_lr, warmup_steps, num_train_steps) tx = optax.adamw(learning_rate=lr, weight_decay=weight_decay, mask=weight_decay_mask) return tx, lr

transformers/examples/research_projects/jax-projects/big_bird/bigbird_flax.py/0

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# Wav2Vec2 Contrastive Loss PreTraining examples The following example showcases how to pretrain a wav2vec2 model using the JAX/Flax backend. Pretraining Wav2Vec2 is rather complex, so it is highly recommended to read the [official paper](https://arxiv.org/abs/2006.11477). JAX/Flax allows you to trace pure functions and compile them into efficient, fused accelerator code on both GPU and TPU. Models written in JAX/Flax are **immutable** and updated in a purely functional way which enables simple and efficient model parallelism. `run_wav2vec2_pretrain_flax.py` is a lightweight example of how to download and preprocess a dataset from the 🤗 Datasets library or use your own files (jsonlines or csv), then pretrain the wav2vec2 architectures above on it. For custom datasets in `jsonlines` format please see: [the Datasets documentation](https://huggingface.co/docs/datasets/loading_datasets#json-files) and you also will find examples of these below. Let's start by creating a model repository to save the trained model and logs. Here we call the model `"wav2vec2-base-robust"`, but you can change the model name as you like. You can do this either directly on [huggingface.co](https://huggingface.co/new) (assuming that you are logged in) or via the command line: ```bash huggingface-cli repo create wav2vec2-base-robust ``` Next we clone the model repository to add the tokenizer and model files. ```bash git clone https://huggingface.co/<your-username>/wav2vec2-base-robust ``` To ensure that all tensorboard traces will be uploaded correctly, we need to track them. You can run the following command inside your model repo to do so. ```bash cd wav2vec2-base-robust git lfs track "*tfevents*" ``` Great, we have set up our model repository. During training, we will automatically push the training logs and model weights to the repo. Next, let's add a symbolic link to the `run_wav2vec2_pretrain_flax`. ```bash export MODEL_DIR="./wav2vec2-base-robust" ln -s ~/transformers/examples/research_projects/jax-projects/wav2vec2/run_wav2vec2_pretrain_flax.py ./ ``` ### Create the model configuration Let's first create the model configuration and store it in the model repository. Note that many training parameters can be set in the model configuration including the configuration about the masking distribution (`mask_time_length`, `mask_time_prob`), dropout (`attention_dropout`, ...), the trade-off between the contrastive loss and the diversity loss, etc... Mostly likely you will need to change these parameters depending on your use case. Again, we highly recommend to read the [official paper](https://arxiv.org/abs/2006.11477) to better understand which parameters can be set for pretraining. For this example, we will be using a `"base"`-sized model of Wav2Vec2 with robust layer norm and keep most of the default settings. ```python model_dir="./wav2vec2-base-robust" from transformers import Wav2Vec2Config config = Wav2Vec2Config.from_pretrained( "facebook/wav2vec2-base", mask_time_length=10, mask_time_prob=0.05, diversity_loss_weight=0.1, num_negatives=100, do_stable_layer_norm=True, feat_extract_norm="layer", ) config.save_pretrained(model_dir) ``` ### Create a feature extractor configuration Before we can start the training, we need to define a feature extractor that takes care of normalization, etc... Here we can also re-use the feature extractor of [wav2vec2-base-960h](https://huggingface.co/facebook/wav2vec2-base) while making sure that padding is allowed. ```python model_dir="./wav2vec2-base-robust" from transformers import Wav2Vec2FeatureExtractor config = Wav2Vec2FeatureExtractor.from_pretrained("facebook/wav2vec2-base", return_attention_mask=True) config.save_pretrained(model_dir) ``` ### Train the model Finally, we can run the example script to train the model: ```bash ./run_wav2vec2_pretrain_flax.py \ --output_dir=${MODEL_DIR} \ --num_train_epochs="5" \ --per_device_train_batch_size="32" \ --per_device_eval_batch_size="32" \ --learning_rate="5e-4" \ --weight_decay="0.01" \ --warmup_steps="2000" \ --model_name_or_path=${MODEL_DIR} \ --dataset_name="librispeech_asr" \ --dataset_config_name="clean" \ --train_split_name="train.100" \ --preprocessing_num_workers="4" \ --max_duration_in_seconds="10.0" \ --adam_beta1="0.9" \ --adam_beta2="0.98" \ --pad_to_multiple_of="16384" \ --push_to_hub ``` Note that this script is not fully tested yet, so we cannot ensure that the above script leads to satisfying results.

transformers/examples/research_projects/jax-projects/wav2vec2/README.md/0

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""" coding=utf-8 Copyright 2018, Antonio Mendoza Hao Tan, Mohit Bansal Adapted From Facebook Inc, Detectron2 Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.import copy """ import sys from typing import Tuple import numpy as np import torch from PIL import Image from torch import nn from transformers.image_utils import PILImageResampling from utils import img_tensorize class ResizeShortestEdge: def __init__(self, short_edge_length, max_size=sys.maxsize): """ Args: short_edge_length (list[min, max]) max_size (int): maximum allowed longest edge length. """ self.interp_method = "bilinear" self.max_size = max_size self.short_edge_length = short_edge_length def __call__(self, imgs): img_augs = [] for img in imgs: h, w = img.shape[:2] # later: provide list and randomly choose index for resize size = np.random.randint(self.short_edge_length[0], self.short_edge_length[1] + 1) if size == 0: return img scale = size * 1.0 / min(h, w) if h < w: newh, neww = size, scale * w else: newh, neww = scale * h, size if max(newh, neww) > self.max_size: scale = self.max_size * 1.0 / max(newh, neww) newh = newh * scale neww = neww * scale neww = int(neww + 0.5) newh = int(newh + 0.5) if img.dtype == np.uint8: pil_image = Image.fromarray(img) pil_image = pil_image.resize((neww, newh), PILImageResampling.BILINEAR) img = np.asarray(pil_image) else: img = img.permute(2, 0, 1).unsqueeze(0) # 3, 0, 1) # hw(c) -> nchw img = nn.functional.interpolate( img, (newh, neww), mode=self.interp_method, align_corners=False ).squeeze(0) img_augs.append(img) return img_augs class Preprocess: def __init__(self, cfg): self.aug = ResizeShortestEdge([cfg.INPUT.MIN_SIZE_TEST, cfg.INPUT.MIN_SIZE_TEST], cfg.INPUT.MAX_SIZE_TEST) self.input_format = cfg.INPUT.FORMAT self.size_divisibility = cfg.SIZE_DIVISIBILITY self.pad_value = cfg.PAD_VALUE self.max_image_size = cfg.INPUT.MAX_SIZE_TEST self.device = cfg.MODEL.DEVICE self.pixel_std = torch.tensor(cfg.MODEL.PIXEL_STD).to(self.device).view(len(cfg.MODEL.PIXEL_STD), 1, 1) self.pixel_mean = torch.tensor(cfg.MODEL.PIXEL_MEAN).to(self.device).view(len(cfg.MODEL.PIXEL_STD), 1, 1) self.normalizer = lambda x: (x - self.pixel_mean) / self.pixel_std def pad(self, images): max_size = tuple(max(s) for s in zip(*[img.shape for img in images])) image_sizes = [im.shape[-2:] for im in images] images = [ nn.functional.pad( im, [0, max_size[-1] - size[1], 0, max_size[-2] - size[0]], value=self.pad_value, ) for size, im in zip(image_sizes, images) ] return torch.stack(images), torch.tensor(image_sizes) def __call__(self, images, single_image=False): with torch.no_grad(): if not isinstance(images, list): images = [images] if single_image: assert len(images) == 1 for i in range(len(images)): if isinstance(images[i], torch.Tensor): images.insert(i, images.pop(i).to(self.device).float()) elif not isinstance(images[i], torch.Tensor): images.insert( i, torch.as_tensor(img_tensorize(images.pop(i), input_format=self.input_format)) .to(self.device) .float(), ) # resize smallest edge raw_sizes = torch.tensor([im.shape[:2] for im in images]) images = self.aug(images) # transpose images and convert to torch tensors # images = [torch.as_tensor(i.astype("float32")).permute(2, 0, 1).to(self.device) for i in images] # now normalize before pad to avoid useless arithmetic images = [self.normalizer(x) for x in images] # now pad them to do the following operations images, sizes = self.pad(images) # Normalize if self.size_divisibility > 0: raise NotImplementedError() # pad scales_yx = torch.true_divide(raw_sizes, sizes) if single_image: return images[0], sizes[0], scales_yx[0] else: return images, sizes, scales_yx def _scale_box(boxes, scale_yx): boxes[:, 0::2] *= scale_yx[:, 1] boxes[:, 1::2] *= scale_yx[:, 0] return boxes def _clip_box(tensor, box_size: Tuple[int, int]): assert torch.isfinite(tensor).all(), "Box tensor contains infinite or NaN!" h, w = box_size tensor[:, 0].clamp_(min=0, max=w) tensor[:, 1].clamp_(min=0, max=h) tensor[:, 2].clamp_(min=0, max=w) tensor[:, 3].clamp_(min=0, max=h)

transformers/examples/research_projects/lxmert/processing_image.py/0

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# coding=utf-8 # Copyright 2018 The Google AI Language Team Authors and The HuggingFace Inc. team. # Copyright (c) 2018, NVIDIA CORPORATION. All rights reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. """ Masked BERT model configuration. It replicates the class `~transformers.BertConfig` and adapts it to the specificities of MaskedBert (`pruning_method`, `mask_init` and `mask_scale`.""" import logging from transformers.configuration_utils import PretrainedConfig logger = logging.getLogger(__name__) class MaskedBertConfig(PretrainedConfig): """ A class replicating the `~transformers.BertConfig` with additional parameters for pruning/masking configuration. """ model_type = "masked_bert" def __init__( self, vocab_size=30522, hidden_size=768, num_hidden_layers=12, num_attention_heads=12, intermediate_size=3072, hidden_act="gelu", hidden_dropout_prob=0.1, attention_probs_dropout_prob=0.1, max_position_embeddings=512, type_vocab_size=2, initializer_range=0.02, layer_norm_eps=1e-12, pad_token_id=0, pruning_method="topK", mask_init="constant", mask_scale=0.0, **kwargs, ): super().__init__(pad_token_id=pad_token_id, **kwargs) self.vocab_size = vocab_size self.hidden_size = hidden_size self.num_hidden_layers = num_hidden_layers self.num_attention_heads = num_attention_heads self.hidden_act = hidden_act self.intermediate_size = intermediate_size self.hidden_dropout_prob = hidden_dropout_prob self.attention_probs_dropout_prob = attention_probs_dropout_prob self.max_position_embeddings = max_position_embeddings self.type_vocab_size = type_vocab_size self.initializer_range = initializer_range self.layer_norm_eps = layer_norm_eps self.pruning_method = pruning_method self.mask_init = mask_init self.mask_scale = mask_scale

transformers/examples/research_projects/movement-pruning/emmental/configuration_bert_masked.py/0

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# coding=utf-8 # Copyright 2020 The Google Research Authors. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. """ IMPORTANT: This code was copied from https://github.com/google-research/google-research/blob/master/performer/fast_self_attention/fast_self_attention.py on 6/11/2020. This is very new code, so it might be prone to change soon -> make sure to check the original code and update accordingly Core Fast Attention Module for Flax. Implementation of the approximate fast softmax and generalized attention mechanism leveraging structured random feature maps [RFM] techniques and low rank decomposition of the attention matrix. """ # pylint: disable=invalid-name, missing-function-docstring, line-too-long import abc import functools from collections.abc import Iterable # pylint: disable=g-importing-member import jax import jax.numpy as jnp import numpy as onp from absl import logging from jax import lax, random def nonnegative_softmax_kernel_feature_creator( data, projection_matrix, attention_dims_t, batch_dims_t, precision, is_query, normalize_data=True, eps=0.0001 ): """ Constructs nonnegative kernel features for fast softmax attention Args: data: input for which features are computes projection_matrix: random matrix used to compute features attention_dims_t: tuple of attention dimensions batch_dims_t: tuple of batch dimensions precision: precision parameter is_query: predicate indicating whether input data corresponds to queries or keys normalize_data: predicate indicating whether data should be normalized, eps: numerical stabilizer Returns: Random features for fast softmax attention. """ del attention_dims_t if normalize_data: # We have e^{qk^T/sqrt{d}} = e^{q_norm k_norm^T}, where # w_norm = w * data_normalizer for w in {q,k}. data_normalizer = 1.0 / (jnp.sqrt(jnp.sqrt(data.shape[-1]))) else: data_normalizer = 1.0 ratio = 1.0 / jnp.sqrt(projection_matrix.shape[0]) data_mod_shape = data.shape[0 : len(batch_dims_t)] + projection_matrix.shape data_thick_random_matrix = jnp.zeros(data_mod_shape) + projection_matrix data_dash = lax.dot_general( data_normalizer * data, data_thick_random_matrix, (((data.ndim - 1,), (data_thick_random_matrix.ndim - 1,)), (batch_dims_t, batch_dims_t)), precision=precision, ) diag_data = jnp.square(data) diag_data = jnp.sum(diag_data, axis=data.ndim - 1) diag_data = (diag_data / 2.0) * data_normalizer * data_normalizer diag_data = jnp.expand_dims(diag_data, axis=data.ndim - 1) if is_query: last_dims_t = (len(data_dash.shape) - 1,) data_dash = ratio * ( jnp.exp(data_dash - diag_data - jnp.max(data_dash, axis=last_dims_t, keepdims=True)) + eps ) else: data_dash = ratio * (jnp.exp(data_dash - diag_data - jnp.max(data_dash)) + eps) return data_dash def sincos_softmax_kernel_feature_creator( data, projection_matrix, attention_dims_t, batch_dims_t, precision, normalize_data=True ): """ Constructs kernel sin-cos features for fast softmax attention Args: data: input for which features are computes projection_matrix: random matrix used to compute features attention_dims_t: tuple of attention dimensions batch_dims_t: tuple of batch dimensions precision: precision parameter normalize_data: predicate indicating whether data should be normalized Returns: Random features for fast softmax attention. """ if normalize_data: # We have: exp(qk^T/sqrt{d}) = exp(|q|^2/2sqrt{d}) * exp(|k|^2/2sqrt{d}) * # exp(-(|q*c-k*c|^2)/2), where c = 1.0 / sqrt{sqrt{d}}. data_normalizer = 1.0 / (jnp.sqrt(jnp.sqrt(data.shape[-1]))) else: data_normalizer = 1.0 ratio = 1.0 / jnp.sqrt(projection_matrix.shape[0]) data_mod_shape = data.shape[0 : len(batch_dims_t)] + projection_matrix.shape data_thick_random_matrix = jnp.zeros(data_mod_shape) + projection_matrix data_dash = lax.dot_general( data_normalizer * data, data_thick_random_matrix, (((data.ndim - 1,), (data_thick_random_matrix.ndim - 1,)), (batch_dims_t, batch_dims_t)), precision=precision, ) data_dash_cos = ratio * jnp.cos(data_dash) data_dash_sin = ratio * jnp.sin(data_dash) data_dash = jnp.concatenate((data_dash_cos, data_dash_sin), axis=-1) # Constructing D_data and data^{'} diag_data = jnp.square(data) diag_data = jnp.sum(diag_data, axis=data.ndim - 1) diag_data = (diag_data / 2.0) * data_normalizer * data_normalizer diag_data = jnp.expand_dims(diag_data, axis=data.ndim - 1) # Additional renormalization for numerical stability data_renormalizer = jnp.max(diag_data, attention_dims_t, keepdims=True) diag_data -= data_renormalizer diag_data = jnp.exp(diag_data) data_prime = data_dash * diag_data return data_prime def generalized_kernel_feature_creator( data, projection_matrix, batch_dims_t, precision, kernel_fn, kernel_epsilon, normalize_data ): """ Constructs kernel features for fast generalized attention Args: data: input for which features are computes projection_matrix: matrix used to compute features batch_dims_t: tuple of batch dimensions precision: precision parameter kernel_fn: kernel function used kernel_epsilon: additive positive term added to every feature for numerical stability normalize_data: predicate indicating whether data should be normalized Returns: Random features for fast generalized attention. """ if normalize_data: data_normalizer = 1.0 / (jnp.sqrt(jnp.sqrt(data.shape[-1]))) else: data_normalizer = 1.0 if projection_matrix is None: return kernel_fn(data_normalizer * data) + kernel_epsilon else: data_mod_shape = data.shape[0 : len(batch_dims_t)] + projection_matrix.shape data_thick_random_matrix = jnp.zeros(data_mod_shape) + projection_matrix data_dash = lax.dot_general( data_normalizer * data, data_thick_random_matrix, (((data.ndim - 1,), (data_thick_random_matrix.ndim - 1,)), (batch_dims_t, batch_dims_t)), precision=precision, ) data_prime = kernel_fn(data_dash) + kernel_epsilon return data_prime def make_fast_softmax_attention( qkv_dim, renormalize_attention=True, numerical_stabilizer=0.000001, nb_features=256, ortho_features=True, ortho_scaling=0.0, redraw_features=True, unidirectional=False, nonnegative_features=True, lax_scan_unroll=1, ): """Construct a fast softmax attention method.""" logging.info( "Fast softmax attention: %s features and orthogonal=%s, renormalize=%s", nb_features, ortho_features, renormalize_attention, ) if ortho_features: matrix_creator = functools.partial(GaussianOrthogonalRandomMatrix, nb_features, qkv_dim, scaling=ortho_scaling) else: matrix_creator = functools.partial(GaussianUnstructuredRandomMatrix, nb_features, qkv_dim) if nonnegative_features: def kernel_feature_creator( data, projection_matrix, attention_dims_t, batch_dims_t, precision, is_query, normalize_data=True ): return nonnegative_softmax_kernel_feature_creator( data, projection_matrix, attention_dims_t, batch_dims_t, precision, is_query, normalize_data, numerical_stabilizer, ) else: def kernel_feature_creator( data, projection_matrix, attention_dims_t, batch_dims_t, precision, is_query, normalize_data=True ): del is_query return sincos_softmax_kernel_feature_creator( data, projection_matrix, attention_dims_t, batch_dims_t, precision, normalize_data ) attention_fn = FastAttentionviaLowRankDecomposition( matrix_creator, kernel_feature_creator, renormalize_attention=renormalize_attention, numerical_stabilizer=numerical_stabilizer, redraw_features=redraw_features, unidirectional=unidirectional, lax_scan_unroll=lax_scan_unroll, ).dot_product_attention return attention_fn def make_fast_generalized_attention( qkv_dim, renormalize_attention=True, numerical_stabilizer=0.0, nb_features=256, features_type="deterministic", kernel_fn=jax.nn.relu, kernel_epsilon=0.001, redraw_features=False, unidirectional=False, lax_scan_unroll=1, ): """Construct a fast generalized attention menthod.""" logging.info("Fast generalized attention.: %s features and renormalize=%s", nb_features, renormalize_attention) if features_type == "ortho": matrix_creator = functools.partial(GaussianOrthogonalRandomMatrix, nb_features, qkv_dim, scaling=False) elif features_type == "iid": matrix_creator = functools.partial(GaussianUnstructuredRandomMatrix, nb_features, qkv_dim) elif features_type == "deterministic": matrix_creator = None else: raise ValueError("Unknown feature value type") def kernel_feature_creator( data, projection_matrix, attention_dims_t, batch_dims_t, precision, is_query, normalize_data=False ): del attention_dims_t del is_query return generalized_kernel_feature_creator( data, projection_matrix, batch_dims_t, precision, kernel_fn, kernel_epsilon, normalize_data ) attention_fn = FastAttentionviaLowRankDecomposition( matrix_creator, kernel_feature_creator, renormalize_attention=renormalize_attention, numerical_stabilizer=numerical_stabilizer, redraw_features=redraw_features, unidirectional=unidirectional, lax_scan_unroll=lax_scan_unroll, ).dot_product_attention return attention_fn class RandomMatrix(object): r""" Abstract class providing a method for constructing 2D random arrays. Class is responsible for constructing 2D random arrays. """ __metaclass__ = abc.ABCMeta @abc.abstractmethod def get_2d_array(self): raise NotImplementedError("Abstract method") class GaussianUnstructuredRandomMatrix(RandomMatrix): def __init__(self, nb_rows, nb_columns, key): self.nb_rows = nb_rows self.nb_columns = nb_columns self.key = key def get_2d_array(self): return random.normal(self.key, (self.nb_rows, self.nb_columns)) class GaussianOrthogonalRandomMatrix(RandomMatrix): r""" Class providing a method to create Gaussian orthogonal matrix. Class is responsible for constructing 2D Gaussian orthogonal arrays. """ def __init__(self, nb_rows, nb_columns, key, scaling=0): self.nb_rows = nb_rows self.nb_columns = nb_columns self.key = key self.scaling = scaling def get_2d_array(self): nb_full_blocks = int(self.nb_rows / self.nb_columns) block_list = [] rng = self.key for _ in range(nb_full_blocks): rng, rng_input = jax.random.split(rng) unstructured_block = random.normal(rng_input, (self.nb_columns, self.nb_columns)) q, _ = jnp.linalg.qr(unstructured_block) q = jnp.transpose(q) block_list.append(q) remaining_rows = self.nb_rows - nb_full_blocks * self.nb_columns if remaining_rows > 0: rng, rng_input = jax.random.split(rng) unstructured_block = random.normal(rng_input, (self.nb_columns, self.nb_columns)) q, _ = jnp.linalg.qr(unstructured_block) q = jnp.transpose(q) block_list.append(q[0:remaining_rows]) final_matrix = jnp.vstack(block_list) if self.scaling == 0: multiplier = jnp.linalg.norm(random.normal(self.key, (self.nb_rows, self.nb_columns)), axis=1) elif self.scaling == 1: multiplier = jnp.sqrt(float(self.nb_columns)) * jnp.ones((self.nb_rows)) else: raise ValueError("Scaling must be one of {0, 1}. Was %s" % self._scaling) return jnp.matmul(jnp.diag(multiplier), final_matrix) class FastAttention(object): r""" Abstract class providing a method for fast attention. Class is responsible for providing a method <dot_product_attention> for fast approximate attention. """ __metaclass__ = abc.ABCMeta @abc.abstractmethod def dot_product_attention( self, query, key, value, dtype=jnp.float32, bias=None, axis=None, broadcast_dropout=True, dropout_rng=None, dropout_rate=0.0, deterministic=False, precision=None, ): """ Computes dot-product attention given query, key, and value. This is the core function for applying fast approximate dot-product attention. It calculates the attention weights given query and key and combines the values using the attention weights. This function supports multi-dimensional inputs Args: query: queries for calculating attention with shape of [batch_size, dim1, dim2, ..., dimN, num_heads, mem_channels]. key: keys for calculating attention with shape of [batch_size, dim1, dim2, ..., dimN, num_heads, mem_channels]. value: values to be used in attention with shape of [batch_size, dim1, dim2,..., dimN, num_heads, value_channels]. dtype: the dtype of the computation (default: float32) bias: bias for the attention weights. This can be used for incorporating autoregressive mask, padding mask, proximity bias. axis: axises over which the attention is applied. broadcast_dropout: bool: use a broadcasted dropout along batch dims. dropout_rng: JAX PRNGKey: to be used for dropout. dropout_rate: dropout rate. deterministic: bool, deterministic or not (to apply dropout). precision: numerical precision of the computation see `jax.lax.Precision` for details Returns: Output of shape [bs, dim1, dim2, ..., dimN,, num_heads, value_channels]. """ raise NotImplementedError("Abstract method") def _numerator(z_slice_shape, precision, unroll=1): def fwd(qs, ks, vs): def body(p, qkv): (q, k, v) = qkv p += jnp.einsum("...m,...d->...md", k, v, precision=precision) X_slice = jnp.einsum("...m,...md->...d", q, p, precision=precision) return p, X_slice init_value = jnp.zeros(z_slice_shape) p, W = lax.scan(body, init_value, (qs, ks, vs), unroll=unroll) return W, (p, qs, ks, vs) def bwd(pqkv, W_ct): def body(carry, qkv_xct): p, p_ct = carry q, k, v, x_ct = qkv_xct q_ct = jnp.einsum("...d,...md->...m", x_ct, p, precision=precision) p_ct += jnp.einsum("...d,...m->...md", x_ct, q, precision=precision) k_ct = jnp.einsum("...md,...d->...m", p_ct, v, precision=precision) v_ct = jnp.einsum("...md,...m->...d", p_ct, k, precision=precision) p -= jnp.einsum("...m,...d->...md", k, v, precision=precision) return (p, p_ct), (q_ct, k_ct, v_ct) p, qs, ks, vs = pqkv _, (qs_ct, ks_ct, vs_ct) = lax.scan( body, (p, jnp.zeros_like(p)), (qs, ks, vs, W_ct), reverse=True, unroll=unroll ) return qs_ct, ks_ct, vs_ct @jax.custom_vjp def _numerator_impl(qs, ks, vs): W, _ = fwd(qs, ks, vs) return W _numerator_impl.defvjp(fwd, bwd) return _numerator_impl def _denominator(t_slice_shape, precision, unroll=1): def fwd(qs, ks): def body(p, qk): q, k = qk p += k x = jnp.einsum("...m,...m->...", q, p, precision=precision) return p, x p = jnp.zeros(t_slice_shape) p, R = lax.scan(body, p, (qs, ks), unroll=unroll) return R, (qs, ks, p) def bwd(qkp, R_ct): def body(carry, qkx): p, p_ct = carry q, k, x_ct = qkx q_ct = jnp.einsum("...,...m->...m", x_ct, p, precision=precision) p_ct += jnp.einsum("...,...m->...m", x_ct, q, precision=precision) k_ct = p_ct p -= k return (p, p_ct), (q_ct, k_ct) qs, ks, p = qkp _, (qs_ct, ks_ct) = lax.scan(body, (p, jnp.zeros_like(p)), (qs, ks, R_ct), reverse=True, unroll=unroll) return (qs_ct, ks_ct) @jax.custom_vjp def _denominator_impl(qs, ks): R, _ = fwd(qs, ks) return R _denominator_impl.defvjp(fwd, bwd) return _denominator_impl class FastAttentionviaLowRankDecomposition(FastAttention): r""" Class providing a method for fast attention via low rank decomposition. Class is responsible for providing a method <dot_product_attention> for fast dot-product attention with the use of low rank decomposition (e.g. with random feature maps). """ def __init__( self, matrix_creator, kernel_feature_creator, renormalize_attention, numerical_stabilizer, redraw_features, unidirectional, lax_scan_unroll=1, ): # For optimal GPU performance, set to 16. rng = random.PRNGKey(0) self.matrix_creator = matrix_creator self.projection_matrix = self.draw_weights(rng) self.kernel_feature_creator = kernel_feature_creator self.renormalize_attention = renormalize_attention self.numerical_stabilizer = numerical_stabilizer self.redraw_features = redraw_features self.unidirectional = unidirectional self.lax_scan_unroll = lax_scan_unroll def draw_weights(self, key): if self.matrix_creator is None: return None matrixrng, _ = random.split(key) projection_matrix = self.matrix_creator(key=matrixrng).get_2d_array() return projection_matrix def dot_product_attention( self, query, key, value, dtype=jnp.float32, bias=None, axis=None, broadcast_dropout=True, dropout_rng=None, dropout_rate=0.0, deterministic=False, precision=None, ): assert key.shape[:-1] == value.shape[:-1] assert query.shape[0:1] == key.shape[0:1] and query.shape[-1] == key.shape[-1] if axis is None: axis = tuple(range(1, key.ndim - 2)) if not isinstance(axis, Iterable): axis = (axis,) assert key.ndim == query.ndim assert key.ndim == value.ndim for ax in axis: if not (query.ndim >= 3 and 1 <= ax < query.ndim - 2): raise ValueError("Attention axis must be between the batch axis and the last-two axes.") n = key.ndim # Constructing projection tensor. if self.redraw_features: # TODO(kchoro): Get rid of the constant below. query_seed = lax.convert_element_type(jnp.ceil(jnp.sum(query) * 10000000.0), jnp.int32) rng = random.PRNGKey(query_seed) self.projection_matrix = self.draw_weights(rng) # batch_dims is <bs, <non-attention dims>, num_heads> batch_dims = tuple(onp.delete(range(n), axis + (n - 1,))) # q & k -> (bs, <non-attention dims>, num_heads, <attention dims>, channels) qk_perm = batch_dims + axis + (n - 1,) k_extra_perm = axis + batch_dims + (n - 1,) key_extra = key.transpose(k_extra_perm) key = key.transpose(qk_perm) query = query.transpose(qk_perm) # v -> (bs, <non-attention dims>, num_heads, <attention dims>, channels) v_perm = batch_dims + axis + (n - 1,) value = value.transpose(v_perm) batch_dims_t = tuple(range(len(batch_dims))) attention_dims_t = tuple(range(len(batch_dims), len(batch_dims) + len(axis))) # Constructing tensors Q^{'} and K^{'}. query_prime = self.kernel_feature_creator( query, self.projection_matrix, attention_dims_t, batch_dims_t, precision, True ) key_prime = self.kernel_feature_creator( key, self.projection_matrix, attention_dims_t, batch_dims_t, precision, False ) if self.unidirectional: index = attention_dims_t[0] z_slice_shape = key_prime.shape[0 : len(batch_dims_t)] + (key_prime.shape[-1],) + (value.shape[-1],) numerator_fn = _numerator(z_slice_shape, precision, self.lax_scan_unroll) W = numerator_fn( jnp.moveaxis(query_prime, index, 0), jnp.moveaxis(key_prime, index, 0), jnp.moveaxis(value, index, 0) ) # Constructing W = (Q^{'}(K^{'})^{T})_{masked}V W = jnp.moveaxis(W, 0, index) if not self.renormalize_attention: # Unidirectional, not-normalized attention. perm_inv = _invert_perm(qk_perm) result = W.transpose(perm_inv) return result else: # Unidirectional, normalized attention. thick_all_ones = jnp.zeros(key.shape[0:-1]) + jnp.ones(key_extra.shape[0 : len(axis)]) index = attention_dims_t[0] t_slice_shape = key_prime.shape[0 : len(batch_dims_t)] + (key_prime.shape[-1],) denominator_fn = _denominator(t_slice_shape, precision, self.lax_scan_unroll) R = denominator_fn(jnp.moveaxis(query_prime, index, 0), jnp.moveaxis(key_prime, index, 0)) R = jnp.moveaxis(R, 0, index) else: contract_query = tuple(range(len(batch_dims) + len(axis), len(batch_dims) + len(axis) + 1)) contract_z = tuple(range(len(batch_dims), len(batch_dims) + 1)) # Constructing Z = (K^{'})^{T}V # Z (bs, <non-attention dims>, num_heads, channels_m, channels_v) Z = lax.dot_general( key_prime, value, ((attention_dims_t, attention_dims_t), (batch_dims_t, batch_dims_t)), precision=precision, ) # Constructing W = Q^{'}Z = Q^{'}(K^{'})^{T}V # q (bs, <non-attention dims>, num_heads, <attention dims>, channels_m) # Z (bs, <non-attention dims>, num_heads, channels_m, channels_v) # W (bs, <non-attention dims>, num_heads, <attention dims>, channels_v) W = lax.dot_general( query_prime, Z, ((contract_query, contract_z), (batch_dims_t, batch_dims_t)), precision=precision ) if not self.renormalize_attention: # Bidirectional, not-normalized attention. perm_inv = _invert_perm(qk_perm) result = W.transpose(perm_inv) return result else: # Bidirectional, normalized attention. thick_all_ones = jnp.zeros(key.shape[0:-1]) + jnp.ones(key_extra.shape[0 : len(axis)]) contract_key = tuple(range(len(batch_dims), len(batch_dims) + len(axis))) contract_thick_all_ones = tuple(range(thick_all_ones.ndim - len(axis), thick_all_ones.ndim)) # Construct T = (K^{'})^{T} 1_L # k (bs, <non-attention dims>, num_heads, <attention dims>, channels) T = lax.dot_general( key_prime, thick_all_ones, ((contract_key, contract_thick_all_ones), (batch_dims_t, batch_dims_t)), precision=precision, ) # Construct partition function: R = Q^{'} T = Q^{'}(K^{'})^{T} 1_L # q_p (bs, <non-attention dims>, num_heads, <attention dims>, channs_m) # T (bs, <non-attention dims>, num_heads, channels_m) R = lax.dot_general( query_prime, T, (((query_prime.ndim - 1,), (T.ndim - 1,)), (batch_dims_t, range(0, len(T.shape) - 1))), precision=precision, ) R = R + 2 * self.numerical_stabilizer * (jnp.abs(R) <= self.numerical_stabilizer) R = jnp.reciprocal(R) R = jnp.expand_dims(R, len(R.shape)) # W (bs, <non-attention dims>, num_heads, <attention dims>, channels_v) # R (bs, <non-attention dims>, num_heads, <attention dims>, extra_channel) result = W * R # back to (bs, dim1, dim2, ..., dimN, num_heads, channels) perm_inv = _invert_perm(qk_perm) result = result.transpose(perm_inv) return result def _invert_perm(perm): perm_inv = [0] * len(perm) for i, j in enumerate(perm): perm_inv[j] = i return tuple(perm_inv)

transformers/examples/research_projects/performer/modeling_flax_performer_utils.py/0

{ "file_path": "transformers/examples/research_projects/performer/modeling_flax_performer_utils.py", "repo_id": "transformers", "token_count": 11671 }

57

# coding=utf-8 # Copyright 2020 The HuggingFace Team All rights reserved. # Copyright 2021 NVIDIA Corporation. All rights reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. """ A subclass of `Trainer` specific to Question-Answering tasks """ import logging import os import quant_trainer import torch from torch.utils.data import DataLoader from transformers import Trainer, is_torch_tpu_available from transformers.trainer_utils import PredictionOutput logger = logging.getLogger(__name__) if is_torch_tpu_available(check_device=False): import torch_xla.core.xla_model as xm import torch_xla.debug.metrics as met class QuestionAnsweringTrainer(Trainer): def __init__(self, *args, eval_examples=None, post_process_function=None, quant_trainer_args=None, **kwargs): super().__init__(*args, **kwargs) self.eval_examples = eval_examples self.post_process_function = post_process_function self.quant_trainer_args = quant_trainer_args self.calib_num = 128 # default number of calibration samples def get_calib_dataloader(self, calib_dataset=None): """ Returns the calibration dataloader :class:`~torch.utils.data.DataLoader`. Args: calib_dataset (:obj:`torch.utils.data.Dataset`, `optional`) """ if calib_dataset is None and self.calib_dataset is None: raise ValueError("Trainer: calibration requires an calib_dataset.") calib_dataset = calib_dataset if calib_dataset is not None else self.calib_dataset calib_dataset = self._remove_unused_columns(calib_dataset, description="Calibration") return DataLoader( calib_dataset, batch_size=self.args.eval_batch_size, collate_fn=self.data_collator, drop_last=self.args.dataloader_drop_last, num_workers=self.args.dataloader_num_workers, pin_memory=self.args.dataloader_pin_memory, shuffle=True, ) def calibrate(self, calib_dataset=None): calib_dataset = self.train_dataset if calib_dataset is None else calib_dataset calib_dataloader = self.get_calib_dataloader(calib_dataset) model = self.model quant_trainer.configure_model(model, self.quant_trainer_args, calib=True) model.eval() quant_trainer.enable_calibration(model) logger.info("***** Running calibration *****") logger.info(f" Num examples = {self.calib_num}") logger.info(f" Batch size = {calib_dataloader.batch_size}") for step, inputs in enumerate(calib_dataloader): # Prediction step loss, logits, labels = self.prediction_step(model, inputs, prediction_loss_only=True) if (step + 1) * calib_dataloader.batch_size >= self.calib_num: break quant_trainer.finish_calibration(model, self.quant_trainer_args) self.model = model def evaluate(self, eval_dataset=None, eval_examples=None, ignore_keys=None, metric_key_prefix: str = "eval"): eval_dataset = self.eval_dataset if eval_dataset is None else eval_dataset eval_dataloader = self.get_eval_dataloader(eval_dataset) eval_examples = self.eval_examples if eval_examples is None else eval_examples # Temporarily disable metric computation, we will do it in the loop here. compute_metrics = self.compute_metrics self.compute_metrics = None eval_loop = self.prediction_loop if self.args.use_legacy_prediction_loop else self.evaluation_loop try: output = eval_loop( eval_dataloader, description="Evaluation", # No point gathering the predictions if there are no metrics, otherwise we defer to # self.args.prediction_loss_only prediction_loss_only=True if compute_metrics is None else None, ignore_keys=ignore_keys, ) finally: self.compute_metrics = compute_metrics if self.post_process_function is not None and self.compute_metrics is not None: eval_preds = self.post_process_function(eval_examples, eval_dataset, output.predictions) metrics = self.compute_metrics(eval_preds) # Prefix all keys with metric_key_prefix + '_' for key in list(metrics.keys()): if not key.startswith(f"{metric_key_prefix}_"): metrics[f"{metric_key_prefix}_{key}"] = metrics.pop(key) self.log(metrics) else: metrics = {} if self.args.tpu_metrics_debug or self.args.debug: # tpu-comment: Logging debug metrics for PyTorch/XLA (compile, execute times, ops, etc.) xm.master_print(met.metrics_report()) self.control = self.callback_handler.on_evaluate(self.args, self.state, self.control, metrics) return metrics def predict(self, predict_dataset, predict_examples, ignore_keys=None, metric_key_prefix: str = "test"): predict_dataloader = self.get_test_dataloader(predict_dataset) # Temporarily disable metric computation, we will do it in the loop here. compute_metrics = self.compute_metrics self.compute_metrics = None eval_loop = self.prediction_loop if self.args.use_legacy_prediction_loop else self.evaluation_loop try: output = eval_loop( predict_dataloader, description="Prediction", # No point gathering the predictions if there are no metrics, otherwise we defer to # self.args.prediction_loss_only prediction_loss_only=True if compute_metrics is None else None, ignore_keys=ignore_keys, ) finally: self.compute_metrics = compute_metrics if self.post_process_function is None or self.compute_metrics is None: return output predictions = self.post_process_function(predict_examples, predict_dataset, output.predictions, "predict") metrics = self.compute_metrics(predictions) # Prefix all keys with metric_key_prefix + '_' for key in list(metrics.keys()): if not key.startswith(f"{metric_key_prefix}_"): metrics[f"{metric_key_prefix}_{key}"] = metrics.pop(key) return PredictionOutput(predictions=predictions.predictions, label_ids=predictions.label_ids, metrics=metrics) def save_onnx(self, output_dir="./"): eval_dataset = self.eval_dataset eval_dataloader = self.get_eval_dataloader(eval_dataset) batch = next(iter(eval_dataloader)) # saving device - to make it consistent device = torch.device("cuda" if torch.cuda.is_available() else "cpu") # convert to tuple input_tuple = tuple(v.to(device) for k, v in batch.items()) logger.info("Converting model to be onnx compatible") from pytorch_quantization.nn import TensorQuantizer TensorQuantizer.use_fb_fake_quant = True model = self.model.to(device) model.eval() model.float() model_to_save = model.module if hasattr(model, "module") else model quant_trainer.configure_model(model_to_save, self.quant_trainer_args) output_model_file = os.path.join(output_dir, "model.onnx") logger.info(f"exporting model to {output_model_file}") axes = {0: "batch_size", 1: "seq_len"} torch.onnx.export( model_to_save, input_tuple, output_model_file, export_params=True, opset_version=13, do_constant_folding=True, input_names=["input_ids", "attention_mask", "token_type_ids"], output_names=["output_start_logits", "output_end_logits"], dynamic_axes={ "input_ids": axes, "attention_mask": axes, "token_type_ids": axes, "output_start_logits": axes, "output_end_logits": axes, }, verbose=True, ) logger.info("onnx export finished")

transformers/examples/research_projects/quantization-qdqbert/trainer_quant_qa.py/0

{ "file_path": "transformers/examples/research_projects/quantization-qdqbert/trainer_quant_qa.py", "repo_id": "transformers", "token_count": 3717 }

58

# coding=utf-8 # Copyright 2022 The Google Research Authors. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. """Self-training for sequence classification.""" import argparse import dataclasses import json import logging import os import shutil from typing import List, Optional import datasets from accelerate import Accelerator from datasets import load_dataset from finetuning import finetune from tqdm.auto import tqdm import transformers from transformers import AutoConfig, set_seed from transformers.trainer_utils import IntervalStrategy logger = logging.getLogger(__name__) MODEL_BIN_FILE = "pytorch_model.bin" @dataclasses.dataclass class STModelArguments: """Arguments pertaining to which config/tokenizer/model we are going to fine-tune from.""" model_name_or_path: str = dataclasses.field( metadata={"help": "Path to pretrained model or model identifier from huggingface.co/models."} ) cache_dir: Optional[str] = dataclasses.field( default=None, metadata={"help": "Where do you want to store the pretrained models downloaded from huggingface.co."}, ) @dataclasses.dataclass class STDataArguments: """Arguments pertaining to what data we are going to input our model for training and evaluation.""" train_file: str = dataclasses.field(metadata={"help": "A csv or a json file containing the training data."}) infer_file: str = dataclasses.field(metadata={"help": "A csv or a json file containing the data to predict on."}) eval_file: Optional[str] = dataclasses.field( default=None, metadata={"help": "A csv or a json file containing the validation data."} ) task_name: Optional[str] = dataclasses.field( default=None, metadata={"help": "The name of the task to train on."}, ) label_list: Optional[List[str]] = dataclasses.field( default=None, metadata={"help": "The list of labels for the task."} ) @dataclasses.dataclass class STTrainingArguments: """Training arguments pertaining to the training loop itself.""" output_dir: str = dataclasses.field( metadata={"help": "The output directory where the model predictions and checkpoints will be written."} ) eval_metric: Optional[str] = dataclasses.field( default="accuracy", metadata={"help": "The evaluation metric used for the task."} ) evaluation_strategy: Optional[str] = dataclasses.field( default="no", metadata={ "help": 'The evaluation strategy to adopt during training. Possible values are: ["no", "step", "epoch]' }, ) early_stopping_patience: Optional[int] = dataclasses.field( default=10, metadata={"help": "Number of evaluation calls with no improvement after which training will be stopped."}, ) early_stopping_threshold: Optional[float] = dataclasses.field( default=0.0, metadata={ "help": "How much the specified evaluation metric must improve to satisfy early stopping conditions." }, ) do_filter_by_confidence: Optional[bool] = dataclasses.field( default=False, metadata={"help": "Whether to filter the pseudo-labeled data based on the confidence score."}, ) do_filter_by_val_performance: Optional[bool] = dataclasses.field( default=False, metadata={"help": "Whether to filter the pseudo-labeled data based on the validation performance."}, ) finetune_on_labeled_data: Optional[bool] = dataclasses.field( default=False, metadata={"help": "Whether to fine-tune on labeled data after pseudo training."}, ) confidence_threshold: Optional[float] = dataclasses.field( default=0.0, metadata={"help": "Confidence threshold for pseudo-labeled data filtering."}, ) max_selftrain_iterations: Optional[int] = dataclasses.field( default=100, metadata={"help": "Number of evaluation calls with no improvement after which training will be stopped."}, ) seed: Optional[int] = dataclasses.field( default=None, metadata={"help": "Random seed for initialization."}, ) def create_pseudo_labeled_data(args, infer_input, infer_output, eval_result, id2label, next_data_dir): """Create pseudeo labeled data for the next self-training iteration.""" dataset = datasets.concatenate_datasets([infer_input, infer_output], axis=1) if args.do_filter_by_confidence: dataset = dataset.filter(lambda example: example["probability"] > args.confidence_threshold) if args.do_filter_by_val_performance: assert eval_result >= 0.0 and eval_result <= 1.0 num_selected_rows = int(eval_result * len(dataset)) print(num_selected_rows) dataset = dataset.sort("probability", reverse=True) dataset = dataset.select(range(num_selected_rows)) dataset = dataset.remove_columns(["label", "probability"]) dataset = dataset.rename_column("prediction", "label") dataset = dataset.map(lambda example: {"label": id2label[example["label"]]}) dataset = dataset.shuffle(seed=args.seed) pseudo_labeled_data_file = os.path.join(next_data_dir, f"train_pseudo.{args.data_file_extension}") if args.data_file_extension == "csv": dataset.to_csv(pseudo_labeled_data_file, index=False) else: dataset.to_json(pseudo_labeled_data_file) def selftrain(model_name_or_path, train_file, infer_file, output_dir, **kwargs): """Self-training a pre-trained model on a downstream task. Args: model_name_or_path: Path to pretrained model or model identifier from huggingface.co/models. train_file: A csv or a json file containing the training data. infer_file: A csv or a json file containing the data to predict on. output_dir: The output directory where the model predictions and checkpoints will be written. **kwargs: Dictionary of key/value pairs with which to update the configuration object after loading. The values in kwargs of any keys which are configuration attributes will be used to override the loaded values. """ # Initialize the accelerator. We will let the accelerator handle device # placement for us. accelerator = Accelerator() # Make one log on every process with the configuration for debugging. logging.basicConfig( format="%(asctime)s - %(levelname)s - %(name)s - %(message)s", datefmt="%m/%d/%Y %H:%M:%S", level=logging.INFO, ) logger.info(accelerator.state) # Setup logging, we only want one process per machine to log things on the # screen. accelerator.is_local_main_process is only True for one process per # machine. logger.setLevel(logging.INFO if accelerator.is_local_main_process else logging.ERROR) if accelerator.is_local_main_process: datasets.utils.logging.set_verbosity_warning() transformers.utils.logging.set_verbosity_info() else: datasets.utils.logging.set_verbosity_error() transformers.utils.logging.set_verbosity_error() model_args = STModelArguments(model_name_or_path=model_name_or_path) data_args = STDataArguments(train_file=train_file, infer_file=infer_file) training_args = STTrainingArguments(output_dir=output_dir) args = argparse.Namespace() for arg_class in (model_args, data_args, training_args): for key, value in vars(arg_class).items(): setattr(args, key, value) for key, value in kwargs.items(): if hasattr(args, key): setattr(args, key, value) # Sanity checks data_files = {} args.data_file_extension = None # You need to provide the training data and the data to predict on assert args.train_file is not None assert args.infer_file is not None data_files["train"] = args.train_file data_files["infer"] = args.infer_file if args.evaluation_strategy != IntervalStrategy.NO.value: assert args.eval_file is not None data_files["eval"] = args.eval_file for key in data_files: extension = data_files[key].split(".")[-1] assert extension in ["csv", "json"], f"`{key}_file` should be a csv or a json file." if args.data_file_extension is None: args.data_file_extension = extension else: assert extension == args.data_file_extension, f"`{key}_file` should be a {args.data_file_extension} file`." assert ( args.eval_metric in datasets.list_metrics() ), f"{args.eval_metric} not in the list of supported metrics {datasets.list_metrics()}." # If passed along, set the training seed now. if args.seed is not None: set_seed(args.seed) logger.info("Creating the initial data directory for self-training...") data_dir_format = f"{args.output_dir}/self-train_iter-{{}}".format initial_data_dir = data_dir_format(0) if accelerator.is_main_process: if args.output_dir is not None: os.makedirs(args.output_dir, exist_ok=True) os.makedirs(initial_data_dir, exist_ok=True) accelerator.wait_for_everyone() best_iteration = None best_eval_result = None early_stopping_patience_counter = 0 should_training_stop = False # Show the progress bar progress_bar = tqdm(range(args.max_selftrain_iterations), disable=not accelerator.is_local_main_process) # Self-train for iteration in range(0, int(args.max_selftrain_iterations)): current_data_dir = data_dir_format(iteration) assert os.path.exists(current_data_dir) # Stage 1: initial fine-tuning for iteration = 0 or pseudo-training for # iteration > 0 current_output_dir = os.path.join(current_data_dir, "stage-1") arguments_dict = { "accelerator": accelerator, "model_name_or_path": args.model_name_or_path, "cache_dir": args.cache_dir, "do_train": True, "train_file": data_files["train"] if iteration == 0 else data_files["train_pseudo"], "do_eval": True if args.eval_file is not None else False, "eval_file": data_files["eval"], "do_predict": True, "infer_file": data_files["infer"], "task_name": args.task_name, "label_list": args.label_list, "output_dir": current_output_dir, "eval_metric": args.eval_metric, "evaluation_strategy": args.evaluation_strategy, "early_stopping_patience": args.early_stopping_patience, "early_stopping_threshold": args.early_stopping_threshold, "seed": args.seed, } # Add additional training arguments for key, value in kwargs.items(): if key not in arguments_dict and not hasattr(training_args, key): arguments_dict.update({key: value}) model_bin_file_path = os.path.join(current_output_dir, "best-checkpoint", MODEL_BIN_FILE) if os.path.exists(model_bin_file_path): logger.info( "Found existing model checkpoint at %s. Skipping self-training: iteration: %d, stage: 1.", model_bin_file_path, iteration, ) else: logger.info("***** Running self-training: iteration: %d, stage: 1 *****", iteration) finetune(**arguments_dict) accelerator.wait_for_everyone() assert os.path.exists(model_bin_file_path) logger.info("Self-training job completed: iteration: %d, stage: 1.", iteration) if iteration > 0 and args.finetune_on_labeled_data: # Stage 2 (optional): fine-tuning on the original labeled data model_path = os.path.join(current_output_dir, "best-checkpoint") current_output_dir = os.path.join(current_data_dir, "stage-2") # Update arguments_dict arguments_dict["model_name_or_path"] = model_path arguments_dict["train_file"] = data_files["train"] arguments_dict["output_dir"] = current_output_dir model_bin_file_path = os.path.join(current_output_dir, "best-checkpoint", MODEL_BIN_FILE) if os.path.exists(model_bin_file_path): logger.info( "Found existing model checkpoint at %s. Skipping self-training: iteration: %d, stage: 2.", model_bin_file_path, iteration, ) else: logger.info("***** Running self-training: iteration: %d, stage: 2 *****", iteration) finetune(**arguments_dict) accelerator.wait_for_everyone() assert os.path.exists(model_bin_file_path) logger.info("Self-training job completed: iteration: %d, stage: 2.", iteration) new_iteration = iteration next_data_dir = data_dir_format(iteration + 1) config = AutoConfig.from_pretrained(os.path.join(current_output_dir, "best-checkpoint")) id2label = config.id2label eval_results_file = os.path.join(current_output_dir, "eval_results_best-checkpoint.json") test_results_file = os.path.join(current_output_dir, "test_results_best-checkpoint.json") assert os.path.exists(eval_results_file) with open(eval_results_file, "r") as f: eval_result = float(json.load(f)[args.eval_metric]) infer_output_file = os.path.join(current_output_dir, "infer_output_best-checkpoint.csv") assert os.path.exists(infer_output_file) # Loading the dataset from local csv or json files. infer_input = load_dataset(args.data_file_extension, data_files={"data": data_files["infer"]})["data"] infer_output = load_dataset("csv", data_files={"data": infer_output_file})["data"] if accelerator.is_main_process: os.makedirs(next_data_dir, exist_ok=True) shutil.copy(eval_results_file, os.path.join(output_dir, f"eval_results_iter-{iteration}.json")) if os.path.exists(test_results_file): shutil.copy(eval_results_file, os.path.join(output_dir, f"test_results_iter-{iteration}.json")) create_pseudo_labeled_data(args, infer_input, infer_output, eval_result, id2label, next_data_dir) accelerator.wait_for_everyone() data_files["train_pseudo"] = os.path.join(next_data_dir, f"train_pseudo.{args.data_file_extension}") if args.evaluation_strategy != IntervalStrategy.NO.value: new_eval_result = eval_result if best_iteration is None: best_iteration = new_iteration best_eval_result = new_eval_result else: if new_eval_result - best_eval_result > args.early_stopping_threshold: best_iteration = new_iteration best_eval_result = new_eval_result early_stopping_patience_counter = 0 else: if new_eval_result == best_eval_result: best_iteration = new_iteration best_eval_result = new_eval_result early_stopping_patience_counter += 1 if early_stopping_patience_counter >= args.early_stopping_patience: should_training_stop = True progress_bar.update(1) if should_training_stop: break if best_iteration is not None: # Save the best iteration logger.info("Best iteration: %d", best_iteration) logger.info("Best evaluation result: %s = %f", args.eval_metric, best_eval_result) accelerator.wait_for_everyone() if accelerator.is_main_process: shutil.copy( os.path.join(output_dir, f"eval_results_iter-{iteration}.json"), os.path.join(output_dir, "eval_results_best-iteration.json"), ) else: # Assume that the last iteration is the best logger.info("Best iteration: %d", args.max_selftrain_iterations - 1) logger.info("Best evaluation result: %s = %f", args.eval_metric, eval_result) accelerator.wait_for_everyone() if accelerator.is_main_process: shutil.copy( os.path.join(output_dir, f"eval_results_iter-{args.max_selftrain_iterations - 1}.json"), os.path.join(output_dir, "eval_results_best-iteration.json"), )

transformers/examples/research_projects/self-training-text-classification/selftraining.py/0

{ "file_path": "transformers/examples/research_projects/self-training-text-classification/selftraining.py", "repo_id": "transformers", "token_count": 6792 }

59

# Add parent directory to python path to access lightning_base.py export PYTHONPATH="../":"${PYTHONPATH}" python finetune.py \ --data_dir=$CNN_DIR \ --learning_rate=3e-5 \ --train_batch_size=$BS \ --eval_batch_size=$BS \ --output_dir=$OUTPUT_DIR \ --max_source_length=512 \ --max_target_length=56 \ --val_check_interval=0.1 --n_val=200 \ --do_train --do_predict \ "$@"

transformers/examples/research_projects/seq2seq-distillation/finetune_t5.sh/0

{ "file_path": "transformers/examples/research_projects/seq2seq-distillation/finetune_t5.sh", "repo_id": "transformers", "token_count": 148 }

60

# coding=utf-8 # Copyright 2022 The Microsoft, The Google and The HuggingFace Inc. team. All rights reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. import dataclasses import enum import functools import math import re # The following script is adapted from the script of TaPas. # Original: https://github.com/google-research/tapas/master/wikisql_utils.py from typing import Any, List, Text EMPTY_ANSWER = "none" EMPTY_ANSWER_AGG = "none" def _split_thousands(delimiter, value): split = value.split(delimiter) return len(split) > 1 and any((len(x) == 3 for x in split)) def convert_to_float(value): """Converts value to a float using a series of increasingly complex heuristics. Args: value: object that needs to be converted. Allowed types include float/int/strings. Returns: A float interpretation of value. Raises: ValueError if the float conversion of value fails. """ if isinstance(value, float): return value if isinstance(value, int): return float(value) if not isinstance(value, str): raise ValueError("Argument value is not a string. Can't parse it as float") sanitized = value try: # Example: 1,000.7 if "." in sanitized and "," in sanitized: return float(sanitized.replace(",", "")) # 1,000 if "," in sanitized and _split_thousands(",", sanitized): return float(sanitized.replace(",", "")) # 5,5556 if "," in sanitized and sanitized.count(",") == 1 and not _split_thousands(",", sanitized): return float(sanitized.replace(",", ".")) # 0.0.0.1 if sanitized.count(".") > 1: return float(sanitized.replace(".", "")) # 0,0,0,1 if sanitized.count(",") > 1: return float(sanitized.replace(",", "")) return float(sanitized) except ValueError: # Avoid adding the sanitized value in the error message. raise ValueError("Unable to convert value to float") def _normalize_float(answer): if answer is None: return None try: value = convert_to_float(answer) if isinstance(value, float) and math.isnan(value): return None return value except ValueError: return answer.lower() _TYPE_CONVERTER = { "text": lambda x: x, "real": convert_to_float, } class _Aggregation(enum.Enum): """Aggregations as defined by WikiSQL. Indexes match the data.""" NONE = 0 MAX = 1 MIN = 2 COUNT = 3 SUM = 4 AVERAGE = 5 class _Operator(enum.Enum): """The boolean operators used by WikiSQL. Indexes match the data.""" EQUALS = 0 GREATER = 1 LESSER = 2 @dataclasses.dataclass class _Condition: """Represents an SQL where clauses (e.g A = "a" or B > 5).""" column: Text operator: _Operator cmp_value: Any _TOKENIZER = re.compile(r"\w+|[^\w\s]+", re.UNICODE | re.MULTILINE | re.DOTALL) def _normalize_for_match(x): return list(_TOKENIZER.findall(x.lower())) def _compare(operator, src, tgt): if operator == _Operator.EQUALS: return src == tgt elif operator == _Operator.GREATER: return src > tgt elif operator == _Operator.LESSER: return src < tgt raise ValueError(f"Unknown operator: {operator}") def _parse_value(table, column, cell_value): """Convert numeric values to floats and keeps everything else as string.""" types = table["types"] return _TYPE_CONVERTER[types[column]](cell_value) def _is_string(x): return isinstance(x, str) def _respect_conditions(table, row, conditions): """True if 'row' satisfies all 'conditions'.""" for cond in conditions: table_value = row[cond.column] cmp_value = _parse_value(table, cond.column, cond.cmp_value) if _is_string(table_value) and _is_string(cmp_value): table_value = _normalize_for_match(table_value) cmp_value = _normalize_for_match(cmp_value) if not isinstance(table_value, type(cmp_value)): raise ValueError("Type difference {} != {}".format(type(table_value), type(cmp_value))) if not _compare(cond.operator, table_value, cmp_value): return False return True def _get_float_answer(table, answer_coordinates, aggregation_op): """Applies operation to produce reference float answer.""" if not answer_coordinates: if aggregation_op == _Aggregation.COUNT: return 0.0 else: return EMPTY_ANSWER_AGG # Count can support non numeric answers. if aggregation_op == _Aggregation.COUNT: return float(len(answer_coordinates)) # If we have just one answer, if float returns it or try a conversion. values = [table["rows"][i][j] for (i, j) in answer_coordinates] if len(answer_coordinates) == 1: try: return convert_to_float(values[0]) except ValueError as e: if aggregation_op != _Aggregation.NONE: raise e if aggregation_op == _Aggregation.NONE: return None # Other aggregation only support numeric values. Bail out if we have strings. if not all((isinstance(v, (int, float)) for v in values)): return None if aggregation_op == _Aggregation.SUM: return float(sum(values)) elif aggregation_op == _Aggregation.AVERAGE: return sum(values) / len(answer_coordinates) else: raise ValueError(f"Unknown aggregation: {aggregation_op}") def _get_answer_coordinates(table, sql_query): """Retrieves references coordinates by executing SQL.""" # MAX and MIN are automatically supported by the model. aggregation_op_index = sql_query["agg"] if aggregation_op_index >= 3: aggregation_op = _Aggregation(aggregation_op_index) else: aggregation_op = _Aggregation.NONE target_column = sql_query["sel"] conditions = [ _Condition(column, _Operator(operator), cmp_value) for column, operator, cmp_value in zip( sql_query["conds"]["column_index"], sql_query["conds"]["operator_index"], sql_query["conds"]["condition"] ) ] indices = [] for row in range(len(table["rows"])): if _respect_conditions(table, table["rows"][row], conditions): indices.append((row, target_column)) if not indices: return [], aggregation_op if len(indices) == 1: return indices, aggregation_op # Parsing of MIN/MAX. if aggregation_op_index in (1, 2): operators = {2: min, 1: max} values = [(table["rows"][i][j], index) for index, (i, j) in enumerate(indices)] reduced = functools.reduce(operators[sql_query["agg"]], values) ret = [indices[reduced[1]]] return ret, _Aggregation.NONE return indices, aggregation_op def _get_answer_text(table, answer_coordinates, float_answer): if float_answer is not None: return [str(float_answer)] return [str(table["real_rows"][r][c]) for r, c in answer_coordinates] def retrieve_wikisql_query_answer_tapas(table, example) -> List: answer_coordinates, aggregation_op = _get_answer_coordinates(table, example) float_answer = _get_float_answer(table, answer_coordinates, aggregation_op) answer_text = _get_answer_text(table, answer_coordinates, float_answer) # keep the original data the same with TaPas if len(answer_text) == 0: answer_text = [EMPTY_ANSWER] return answer_text

transformers/examples/research_projects/tapex/wikisql_utils.py/0

{ "file_path": "transformers/examples/research_projects/tapex/wikisql_utils.py", "repo_id": "transformers", "token_count": 3100 }

61

**NOTE**: This example is outdated and is not longer actively maintained. Please follow the new instructions of fine-tuning Wav2Vec2 [here](https://github.com/huggingface/transformers/blob/main/examples/pytorch/speech-recognition/README.md) ## Fine-tuning Wav2Vec2 The `run_asr.py` script allows one to fine-tune pretrained Wav2Vec2 models that can be found [here](https://huggingface.co/models?search=facebook/wav2vec2). This finetuning script can also be run as a google colab [TODO: here]( ). ### Fine-Tuning with TIMIT Let's take a look at the [script](./finetune_base_timit_asr.sh) used to fine-tune [wav2vec2-base](https://huggingface.co/facebook/wav2vec2-base) with the [TIMIT dataset](https://huggingface.co/datasets/timit_asr): ```bash #!/usr/bin/env bash python run_asr.py \ --output_dir="./wav2vec2-base-timit-asr" \ --num_train_epochs="30" \ --per_device_train_batch_size="20" \ --per_device_eval_batch_size="20" \ --evaluation_strategy="steps" \ --save_steps="500" \ --eval_steps="100" \ --logging_steps="50" \ --learning_rate="5e-4" \ --warmup_steps="3000" \ --model_name_or_path="facebook/wav2vec2-base" \ --fp16 \ --dataset_name="timit_asr" \ --train_split_name="train" \ --validation_split_name="test" \ --orthography="timit" \ --preprocessing_num_workers="$(nproc)" \ --group_by_length \ --freeze_feature_extractor \ --verbose_logging \ ``` The resulting model and inference examples can be found [here](https://huggingface.co/elgeish/wav2vec2-base-timit-asr). Some of the arguments above may look unfamiliar, let's break down what's going on: `--orthography="timit"` applies certain text preprocessing rules, for tokenization and normalization, to clean up the dataset. In this case, we use the following instance of `Orthography`: ```python Orthography( do_lower_case=True, # break compounds like "quarter-century-old" and replace pauses "--" translation_table=str.maketrans({"-": " "}), ) ``` The instance above is used as follows: * creates a tokenizer with `do_lower_case=True` (ignores casing for input and lowercases output when decoding) * replaces `"-"` with `" "` to break compounds like `"quarter-century-old"` and to clean up suspended hyphens * cleans up consecutive whitespaces (replaces them with a single space: `" "`) * removes characters not in vocabulary (lacking respective sound units) `--verbose_logging` logs text preprocessing updates and when evaluating, using the validation split every `eval_steps`, logs references and predictions. ### Fine-Tuning with Arabic Speech Corpus Other datasets, like the [Arabic Speech Corpus dataset](https://huggingface.co/datasets/arabic_speech_corpus), require more work! Let's take a look at the [script](./finetune_large_xlsr_53_arabic_speech_corpus.sh) used to fine-tune [wav2vec2-large-xlsr-53](https://huggingface.co/elgeish/wav2vec2-large-xlsr-53-arabic): ```bash #!/usr/bin/env bash python run_asr.py \ --output_dir="./wav2vec2-large-xlsr-53-arabic-speech-corpus" \ --num_train_epochs="50" \ --per_device_train_batch_size="1" \ --per_device_eval_batch_size="1" \ --gradient_accumulation_steps="8" \ --evaluation_strategy="steps" \ --save_steps="500" \ --eval_steps="100" \ --logging_steps="50" \ --learning_rate="5e-4" \ --warmup_steps="3000" \ --model_name_or_path="elgeish/wav2vec2-large-xlsr-53-arabic" \ --fp16 \ --dataset_name="arabic_speech_corpus" \ --train_split_name="train" \ --validation_split_name="test" \ --max_duration_in_seconds="15" \ --orthography="buckwalter" \ --preprocessing_num_workers="$(nproc)" \ --group_by_length \ --freeze_feature_extractor \ --target_feature_extractor_sampling_rate \ --verbose_logging \ ``` First, let's understand how this dataset represents Arabic text; it uses a format called [Buckwalter transliteration](https://en.wikipedia.org/wiki/Buckwalter_transliteration). We use the [lang-trans](https://github.com/kariminf/lang-trans) package to convert back to Arabic when logging. The Buckwalter format only includes ASCII characters, some of which are non-alpha (e.g., `">"` maps to `"أ"`). `--orthography="buckwalter"` applies certain text preprocessing rules, for tokenization and normalization, to clean up the dataset. In this case, we use the following instance of `Orthography`: ```python Orthography( vocab_file=pathlib.Path(__file__).parent.joinpath("vocab/buckwalter.json"), word_delimiter_token="/", # "|" is Arabic letter alef with madda above words_to_remove={"sil"}, # fixing "sil" in arabic_speech_corpus dataset untransliterator=arabic.buckwalter.untransliterate, translation_table=str.maketrans(translation_table = { "-": " ", # sometimes used to represent pauses "^": "v", # fixing "tha" in arabic_speech_corpus dataset }), ) ``` The instance above is used as follows: * creates a tokenizer with Buckwalter vocabulary and `word_delimiter_token="/"` * replaces `"-"` with `" "` to clean up hyphens and fixes the orthography for `"ث"` * removes words used as indicators (in this case, `"sil"` is used for silence) * cleans up consecutive whitespaces (replaces them with a single space: `" "`) * removes characters not in vocabulary (lacking respective sound units) `--verbose_logging` logs text preprocessing updates and when evaluating, using the validation split every `eval_steps`, logs references and predictions. Using the Buckwalter format, text is also logged in Arabic abjad. `--target_feature_extractor_sampling_rate` resamples audio to target feature extractor's sampling rate (16kHz). `--max_duration_in_seconds="15"` filters out examples whose audio is longer than the specified limit, which helps with capping GPU memory usage. ### DeepSpeed Integration To learn how to deploy Deepspeed Integration please refer to [this guide](https://huggingface.co/transformers/main/main_classes/deepspeed.html#deepspeed-trainer-integration). But to get started quickly all you need is to install: ```bash pip install deepspeed ``` and then use the default configuration files in this directory: * `ds_config_wav2vec2_zero2.json` * `ds_config_wav2vec2_zero3.json` Here are examples of how you can use DeepSpeed: (edit the value for `--num_gpus` to match the number of GPUs you have) ZeRO-2: ```bash PYTHONPATH=../../../src deepspeed --num_gpus 2 \ run_asr.py \ --output_dir=output_dir --num_train_epochs=2 --per_device_train_batch_size=2 \ --per_device_eval_batch_size=2 --evaluation_strategy=steps --save_steps=500 --eval_steps=100 \ --logging_steps=5 --learning_rate=5e-4 --warmup_steps=3000 \ --model_name_or_path=patrickvonplaten/wav2vec2_tiny_random_robust \ --dataset_name=hf-internal-testing/librispeech_asr_dummy --dataset_config_name=clean \ --train_split_name=validation --validation_split_name=validation --orthography=timit \ --preprocessing_num_workers=1 --group_by_length --freeze_feature_extractor --verbose_logging \ --deepspeed ds_config_wav2vec2_zero2.json ``` For ZeRO-2 with more than 1 gpu you need to use (which is already in the example configuration file): ```json "zero_optimization": { ... "find_unused_parameters": true, ... } ``` ZeRO-3: ```bash PYTHONPATH=../../../src deepspeed --num_gpus 2 \ run_asr.py \ --output_dir=output_dir --num_train_epochs=2 --per_device_train_batch_size=2 \ --per_device_eval_batch_size=2 --evaluation_strategy=steps --save_steps=500 --eval_steps=100 \ --logging_steps=5 --learning_rate=5e-4 --warmup_steps=3000 \ --model_name_or_path=patrickvonplaten/wav2vec2_tiny_random_robust \ --dataset_name=hf-internal-testing/librispeech_asr_dummy --dataset_config_name=clean \ --train_split_name=validation --validation_split_name=validation --orthography=timit \ --preprocessing_num_workers=1 --group_by_length --freeze_feature_extractor --verbose_logging \ --deepspeed ds_config_wav2vec2_zero3.json ``` ### Pretraining Wav2Vec2 The `run_pretrain.py` script allows one to pretrain a Wav2Vec2 model from scratch using Wav2Vec2's contrastive loss objective (see official [paper](https://arxiv.org/abs/2006.11477) for more information). It is recommended to pre-train Wav2Vec2 with Trainer + Deepspeed (please refer to [this guide](https://huggingface.co/transformers/main/main_classes/deepspeed.html#deepspeed-trainer-integration) for more information). Here is an example of how you can use DeepSpeed ZeRO-2 to pretrain a small Wav2Vec2 model: ```bash PYTHONPATH=../../../src deepspeed --num_gpus 4 run_pretrain.py \ --output_dir="./wav2vec2-base-libri-100h" \ --num_train_epochs="3" \ --per_device_train_batch_size="32" \ --per_device_eval_batch_size="32" \ --gradient_accumulation_steps="2" \ --save_total_limit="3" \ --save_steps="500" \ --logging_steps="10" \ --learning_rate="5e-4" \ --weight_decay="0.01" \ --warmup_steps="3000" \ --model_name_or_path="patrickvonplaten/wav2vec2-base-libri-100h" \ --dataset_name="librispeech_asr" \ --dataset_config_name="clean" \ --train_split_name="train.100" \ --preprocessing_num_workers="4" \ --max_duration_in_seconds="10.0" \ --group_by_length \ --verbose_logging \ --fp16 \ --deepspeed ds_config_wav2vec2_zero2.json \ ``` ### Forced Alignment Character level forced alignment for audio and text pairs with wav2vec2 models finetuned on ASR task for a specific language. Inspired by [this](https://pytorch.org/tutorials/intermediate/forced_alignment_with_torchaudio_tutorial.html) Pytorch tutorial. #### Input Formats Input format in script.txt Input format in wavs directroy 0000 sentence1 0000.wav 0001 sentence2 0001.wav #### Output Format Output directory will contain 0000.txt and 0001.txt. Each file will have format like below char score start_ms end_ms h 0.25 1440 1520 #### Run command ```bash python alignment.py \ --model_name="arijitx/wav2vec2-xls-r-300m-bengali" \ --wav_dir="./wavs" --text_file="script.txt" \ --input_wavs_sr=48000 \ --output_dir="./out_alignment" \ --cuda ```

transformers/examples/research_projects/wav2vec2/README.md/0

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# Image classification examples This directory contains 2 scripts that showcase how to fine-tune any model supported by the [`TFAutoModelForImageClassification` API](https://huggingface.co/docs/transformers/main/en/model_doc/auto#transformers.TFAutoModelForImageClassification) (such as [ViT](https://huggingface.co/docs/transformers/main/en/model_doc/vit), [ConvNeXT](https://huggingface.co/docs/transformers/main/en/model_doc/convnext), [ResNet](https://huggingface.co/docs/transformers/main/en/model_doc/resnet), [Swin Transformer](https://huggingface.co/docs/transformers/main/en/model_doc/swin)...) using TensorFlow. They can be used to fine-tune models on both [datasets from the hub](#using-datasets-from-hub) as well as on [your own custom data](#using-your-own-data). <img src="https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/image_classification_inference_widget.png" height="400" /> Try out the inference widget here: https://huggingface.co/google/vit-base-patch16-224 ## TensorFlow Based on the script [`run_image_classification.py`](https://github.com/huggingface/transformers/blob/main/examples/tensorflow/image-classification/run_image_classification.py). ### Using datasets from Hub Here we show how to fine-tune a Vision Transformer (`ViT`) on the [beans](https://huggingface.co/datasets/beans) dataset, to classify the disease type of bean leaves. The following will train a model and push it to the `amyeroberts/vit-base-beans` repo. ```bash python run_image_classification.py \ --dataset_name beans \ --output_dir ./beans_outputs/ \ --remove_unused_columns False \ --do_train \ --do_eval \ --push_to_hub \ --hub_model_id amyeroberts/vit-base-beans \ --learning_rate 2e-5 \ --num_train_epochs 5 \ --per_device_train_batch_size 8 \ --per_device_eval_batch_size 8 \ --logging_strategy steps \ --logging_steps 10 \ --evaluation_strategy epoch \ --save_strategy epoch \ --load_best_model_at_end True \ --save_total_limit 3 \ --seed 1337 ``` 👀 See the results here: [amyeroberts/vit-base-beans](https://huggingface.co/amyeroberts/vit-base-beans). Note that you can replace the model and dataset by simply setting the `model_name_or_path` and `dataset_name` arguments respectively, with any model or dataset from the [hub](https://huggingface.co/). For an overview of all possible arguments, we refer to the [docs](https://huggingface.co/docs/transformers/main_classes/trainer#transformers.TrainingArguments) of the `TrainingArguments`, which can be passed as flags. > If your model classification head dimensions do not fit the number of labels in the dataset, you can specify `--ignore_mismatched_sizes` to adapt it. ### Using your own data To use your own dataset, there are 2 ways: - you can either provide your own folders as `--train_dir` and/or `--validation_dir` arguments - you can upload your dataset to the hub (possibly as a private repo, if you prefer so), and simply pass the `--dataset_name` argument. Below, we explain both in more detail. #### Provide them as folders If you provide your own folders with images, the script expects the following directory structure: ```bash root/dog/xxx.png root/dog/xxy.png root/dog/[...]/xxz.png root/cat/123.png root/cat/nsdf3.png root/cat/[...]/asd932_.png ``` In other words, you need to organize your images in subfolders, based on their class. You can then run the script like this: ```bash python run_image_classification.py \ --train_dir <path-to-train-root> \ --output_dir ./outputs/ \ --remove_unused_columns False \ --do_train \ --do_eval ``` Internally, the script will use the [`ImageFolder`](https://huggingface.co/docs/datasets/v2.0.0/en/image_process#imagefolder) feature which will automatically turn the folders into 🤗 Dataset objects. ##### 💡 The above will split the train dir into training and evaluation sets - To control the split amount, use the `--train_val_split` flag. - To provide your own validation split in its own directory, you can pass the `--validation_dir <path-to-val-root>` flag. #### Upload your data to the hub, as a (possibly private) repo To upload your image dataset to the hub you can use the [`ImageFolder`](https://huggingface.co/docs/datasets/v2.0.0/en/image_process#imagefolder) feature available in 🤗 Datasets. Simply do the following: ```python from datasets import load_dataset # example 1: local folder dataset = load_dataset("imagefolder", data_dir="path_to_your_folder") # example 2: local files (supported formats are tar, gzip, zip, xz, rar, zstd) dataset = load_dataset("imagefolder", data_files="path_to_zip_file") # example 3: remote files (supported formats are tar, gzip, zip, xz, rar, zstd) dataset = load_dataset("imagefolder", data_files="https://download.microsoft.com/download/3/E/1/3E1C3F21-ECDB-4869-8368-6DEBA77B919F/kagglecatsanddogs_3367a.zip") # example 4: providing several splits dataset = load_dataset("imagefolder", data_files={"train": ["path/to/file1", "path/to/file2"], "test": ["path/to/file3", "path/to/file4"]}) ``` `ImageFolder` will create a `label` column, and the label name is based on the directory name. Next, push it to the hub! ```python # assuming you have ran the huggingface-cli login command in a terminal dataset.push_to_hub("name_of_your_dataset") # if you want to push to a private repo, simply pass private=True: dataset.push_to_hub("name_of_your_dataset", private=True) ``` and that's it! You can now train your model by simply setting the `--dataset_name` argument to the name of your dataset on the hub (as explained in [Using datasets from the 🤗 hub](#using-datasets-from-hub)). More on this can also be found in [this blog post](https://huggingface.co/blog/image-search-datasets). ### Sharing your model on 🤗 Hub 0. If you haven't already, [sign up](https://huggingface.co/join) for a 🤗 account 1. Make sure you have `git-lfs` installed and git set up. ```bash $ apt install git-lfs $ git config --global user.email "[email protected]" $ git config --global user.name "Your Name" ``` 2. Log in with your HuggingFace account credentials using `huggingface-cli`: ```bash $ huggingface-cli login # ...follow the prompts ``` 3. When running the script, pass the following arguments: ```bash python run_image_classification.py \ --push_to_hub \ --push_to_hub_model_id <name-your-model> \ ... ```

transformers/examples/tensorflow/image-classification/README.md/0

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#!/usr/bin/env python # coding=utf-8 # Copyright 2021 The HuggingFace Team. All rights reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. """ Fine-tuning the library models for translation. """ # You can also adapt this script on your own sequence to sequence task. Pointers for this are left as comments. import json import logging import os import sys import warnings from dataclasses import dataclass, field from typing import Optional import datasets import evaluate import numpy as np import tensorflow as tf from datasets import load_dataset import transformers from transformers import ( AutoConfig, AutoTokenizer, DataCollatorForSeq2Seq, HfArgumentParser, KerasMetricCallback, M2M100Tokenizer, MBart50Tokenizer, MBart50TokenizerFast, MBartTokenizer, MBartTokenizerFast, PushToHubCallback, TFAutoModelForSeq2SeqLM, TFTrainingArguments, create_optimizer, set_seed, ) from transformers.trainer_utils import get_last_checkpoint from transformers.utils import check_min_version, send_example_telemetry from transformers.utils.versions import require_version # region Dependencies and constants # Will error if the minimal version of Transformers is not installed. Remove at your own risks. check_min_version("4.39.0.dev0") require_version("datasets>=1.8.0", "To fix: pip install -r examples/pytorch/summarization/requirements.txt") logger = logging.getLogger(__name__) MULTILINGUAL_TOKENIZERS = [MBartTokenizer, MBartTokenizerFast, MBart50Tokenizer, MBart50TokenizerFast, M2M100Tokenizer] # endregion # region Arguments @dataclass class ModelArguments: """ Arguments pertaining to which model/config/tokenizer we are going to fine-tune from. """ model_name_or_path: str = field( metadata={"help": "Path to pretrained model or model identifier from huggingface.co/models"} ) config_name: Optional[str] = field( default=None, metadata={"help": "Pretrained config name or path if not the same as model_name"} ) tokenizer_name: Optional[str] = field( default=None, metadata={"help": "Pretrained tokenizer name or path if not the same as model_name"} ) cache_dir: Optional[str] = field( default=None, metadata={"help": "Where to store the pretrained models downloaded from huggingface.co"}, ) use_fast_tokenizer: bool = field( default=True, metadata={"help": "Whether to use one of the fast tokenizer (backed by the tokenizers library) or not."}, ) model_revision: str = field( default="main", metadata={"help": "The specific model version to use (can be a branch name, tag name or commit id)."}, ) token: str = field( default=None, metadata={ "help": ( "The token to use as HTTP bearer authorization for remote files. If not specified, will use the token " "generated when running `huggingface-cli login` (stored in `~/.huggingface`)." ) }, ) use_auth_token: bool = field( default=None, metadata={ "help": "The `use_auth_token` argument is deprecated and will be removed in v4.34. Please use `token` instead." }, ) trust_remote_code: bool = field( default=False, metadata={ "help": ( "Whether or not to allow for custom models defined on the Hub in their own modeling files. This option " "should only be set to `True` for repositories you trust and in which you have read the code, as it will " "execute code present on the Hub on your local machine." ) }, ) @dataclass class DataTrainingArguments: """ Arguments pertaining to what data we are going to input our model for training and eval. """ source_lang: str = field(default=None, metadata={"help": "Source language id for translation."}) target_lang: str = field(default=None, metadata={"help": "Target language id for translation."}) dataset_name: Optional[str] = field( default=None, metadata={"help": "The name of the dataset to use (via the datasets library)."} ) dataset_config_name: Optional[str] = field( default=None, metadata={"help": "The configuration name of the dataset to use (via the datasets library)."} ) train_file: Optional[str] = field( default=None, metadata={"help": "The input training data file (a jsonlines or csv file)."} ) validation_file: Optional[str] = field( default=None, metadata={ "help": ( "An optional input evaluation data file to evaluate the metrics (rouge) on (a jsonlines or csv file)." ) }, ) test_file: Optional[str] = field( default=None, metadata={ "help": "An optional input test data file to evaluate the metrics (rouge) on (a jsonlines or csv file)." }, ) overwrite_cache: bool = field( default=False, metadata={"help": "Overwrite the cached training and evaluation sets"} ) preprocessing_num_workers: Optional[int] = field( default=None, metadata={"help": "The number of processes to use for the preprocessing."}, ) max_source_length: Optional[int] = field( default=1024, metadata={ "help": ( "The maximum total input sequence length after tokenization. Sequences longer " "than this will be truncated, sequences shorter will be padded." ) }, ) max_target_length: Optional[int] = field( default=128, metadata={ "help": ( "The maximum total sequence length for target text after tokenization. Sequences longer " "than this will be truncated, sequences shorter will be padded." ) }, ) val_max_target_length: Optional[int] = field( default=None, metadata={ "help": ( "The maximum total sequence length for validation target text after tokenization. Sequences longer " "than this will be truncated, sequences shorter will be padded. Will default to `max_target_length`. " "This argument is also used to override the ``max_length`` param of ``model.generate``, which is used " "during ``evaluate`` and ``predict``." ) }, ) pad_to_max_length: bool = field( default=False, metadata={ "help": ( "Whether to pad all samples to model maximum sentence length. " "If False, will pad the samples dynamically when batching to the maximum length in the batch. More " "efficient on GPU but very bad for TPU." ) }, ) max_train_samples: Optional[int] = field( default=None, metadata={ "help": ( "For debugging purposes or quicker training, truncate the number of training examples to this " "value if set." ) }, ) max_eval_samples: Optional[int] = field( default=None, metadata={ "help": ( "For debugging purposes or quicker training, truncate the number of evaluation examples to this " "value if set." ) }, ) max_predict_samples: Optional[int] = field( default=None, metadata={ "help": ( "For debugging purposes or quicker training, truncate the number of prediction examples to this " "value if set." ) }, ) num_beams: Optional[int] = field( default=1, metadata={ "help": ( "Number of beams to use for evaluation. This argument will be passed to ``model.generate``, " "which is used during ``evaluate`` and ``predict``." ) }, ) ignore_pad_token_for_loss: bool = field( default=True, metadata={ "help": "Whether to ignore the tokens corresponding to padded labels in the loss computation or not." }, ) source_prefix: Optional[str] = field( default=None, metadata={"help": "A prefix to add before every source text (useful for T5 models)."} ) forced_bos_token: Optional[str] = field( default=None, metadata={ "help": ( "The token to force as the first generated token after the :obj:`decoder_start_token_id`.Useful for" " multilingual models like :doc:`mBART <../model_doc/mbart>` where the first generated token needs to" " be the target language token.(Usually it is the target language token)" ) }, ) def __post_init__(self): if self.dataset_name is None and self.train_file is None and self.validation_file is None: raise ValueError("Need either a dataset name or a training/validation file.") else: if self.train_file is not None: extension = self.train_file.split(".")[-1] assert extension in ["csv", "json"], "`train_file` should be a csv or a json file." if self.validation_file is not None: extension = self.validation_file.split(".")[-1] assert extension in ["csv", "json"], "`validation_file` should be a csv or a json file." if self.val_max_target_length is None: self.val_max_target_length = self.max_target_length # endregion def main(): # region Argument parsing # See all possible arguments in src/transformers/training_args.py # or by passing the --help flag to this script. # We now keep distinct sets of args, for a cleaner separation of concerns. parser = HfArgumentParser((ModelArguments, DataTrainingArguments, TFTrainingArguments)) if len(sys.argv) == 2 and sys.argv[1].endswith(".json"): # If we pass only one argument to the script and it's the path to a json file, # let's parse it to get our arguments. model_args, data_args, training_args = parser.parse_json_file(json_file=os.path.abspath(sys.argv[1])) else: model_args, data_args, training_args = parser.parse_args_into_dataclasses() if model_args.use_auth_token is not None: warnings.warn( "The `use_auth_token` argument is deprecated and will be removed in v4.34. Please use `token` instead.", FutureWarning, ) if model_args.token is not None: raise ValueError("`token` and `use_auth_token` are both specified. Please set only the argument `token`.") model_args.token = model_args.use_auth_token # Sending telemetry. Tracking the example usage helps us better allocate resources to maintain them. The # information sent is the one passed as arguments along with your Python/PyTorch versions. send_example_telemetry("run_translation", model_args, data_args, framework="tensorflow") # endregion # region Logging logging.basicConfig( format="%(asctime)s - %(levelname)s - %(name)s - %(message)s", datefmt="%m/%d/%Y %H:%M:%S", handlers=[logging.StreamHandler(sys.stdout)], ) logger.setLevel(logging.INFO) datasets.utils.logging.set_verbosity(logging.INFO) transformers.utils.logging.set_verbosity(logging.INFO) # Log on each process the small summary: logger.info(f"Training/evaluation parameters {training_args}") # endregion # region Detecting last checkpoint last_checkpoint = None if os.path.isdir(training_args.output_dir) and training_args.do_train and not training_args.overwrite_output_dir: last_checkpoint = get_last_checkpoint(training_args.output_dir) if last_checkpoint is None and len(os.listdir(training_args.output_dir)) > 0: raise ValueError( f"Output directory ({training_args.output_dir}) already exists and is not empty. " "Use --overwrite_output_dir to overcome." ) elif last_checkpoint is not None and training_args.resume_from_checkpoint is None: logger.info( f"Checkpoint detected, resuming training at {last_checkpoint}. To avoid this behavior, change " "the `--output_dir` or add `--overwrite_output_dir` to train from scratch." ) # endregion # Set seed before initializing model. set_seed(training_args.seed) # region Load datasets # Get the datasets: you can either provide your own CSV/JSON training and evaluation files (see below) # or just provide the name of one of the public datasets available on the hub at https://huggingface.co/datasets/ # (the dataset will be downloaded automatically from the datasets Hub). # # For CSV/JSON files this script will use the first column for the full texts and the second column for the # summaries (unless you specify column names for this with the `text_column` and `summary_column` arguments). # # In distributed training, the load_dataset function guarantee that only one local process can concurrently # download the dataset. if data_args.dataset_name is not None: # Downloading and loading a dataset from the hub. raw_datasets = load_dataset( data_args.dataset_name, data_args.dataset_config_name, cache_dir=model_args.cache_dir, token=model_args.token, ) else: data_files = {} if data_args.train_file is not None: data_files["train"] = data_args.train_file extension = data_args.train_file.split(".")[-1] if data_args.validation_file is not None: data_files["validation"] = data_args.validation_file extension = data_args.validation_file.split(".")[-1] raw_datasets = load_dataset( extension, data_files=data_files, cache_dir=model_args.cache_dir, token=model_args.token, ) # See more about loading any type of standard or custom dataset (from files, python dict, pandas DataFrame, etc) at # https://huggingface.co/docs/datasets/loading # endregion # region Load model config and tokenizer # # Distributed training: # The .from_pretrained methods guarantee that only one local process can concurrently # download model & vocab. config = AutoConfig.from_pretrained( model_args.config_name if model_args.config_name else model_args.model_name_or_path, cache_dir=model_args.cache_dir, revision=model_args.model_revision, token=model_args.token, trust_remote_code=model_args.trust_remote_code, ) tokenizer = AutoTokenizer.from_pretrained( model_args.tokenizer_name if model_args.tokenizer_name else model_args.model_name_or_path, cache_dir=model_args.cache_dir, use_fast=model_args.use_fast_tokenizer, revision=model_args.model_revision, token=model_args.token, trust_remote_code=model_args.trust_remote_code, ) prefix = data_args.source_prefix if data_args.source_prefix is not None else "" # endregion # region Dataset preprocessing # We need to tokenize inputs and targets. if training_args.do_train: column_names = raw_datasets["train"].column_names elif training_args.do_eval: column_names = raw_datasets["validation"].column_names else: logger.info("There is nothing to do. Please pass `do_train`, and/or `do_eval`.") return column_names = raw_datasets["train"].column_names # For translation we set the codes of our source and target languages (only useful for mBART, the others will # ignore those attributes). if isinstance(tokenizer, tuple(MULTILINGUAL_TOKENIZERS)): assert data_args.target_lang is not None and data_args.source_lang is not None, ( f"{tokenizer.__class__.__name__} is a multilingual tokenizer which requires --source_lang and " "--target_lang arguments." ) tokenizer.src_lang = data_args.source_lang tokenizer.tgt_lang = data_args.target_lang forced_bos_token_id = ( tokenizer.lang_code_to_id[data_args.forced_bos_token] if data_args.forced_bos_token is not None else None ) # Get the language codes for input/target. source_lang = data_args.source_lang.split("_")[0] target_lang = data_args.target_lang.split("_")[0] padding = "max_length" if data_args.pad_to_max_length else False # Temporarily set max_target_length for training. max_target_length = data_args.max_target_length padding = "max_length" if data_args.pad_to_max_length else False def preprocess_function(examples): inputs = [ex[source_lang] for ex in examples["translation"]] targets = [ex[target_lang] for ex in examples["translation"]] inputs = [prefix + inp for inp in inputs] model_inputs = tokenizer(inputs, max_length=data_args.max_source_length, padding=padding, truncation=True) # Tokenize targets with the `text_target` keyword argument labels = tokenizer(text_target=targets, max_length=max_target_length, padding=padding, truncation=True) # If we are padding here, replace all tokenizer.pad_token_id in the labels by -100 when we want to ignore # padding in the loss. if padding == "max_length" and data_args.ignore_pad_token_for_loss: labels["input_ids"] = [ [(l if l != tokenizer.pad_token_id else -100) for l in label] for label in labels["input_ids"] ] model_inputs["labels"] = labels["input_ids"] return model_inputs if training_args.do_train: if "train" not in raw_datasets: raise ValueError("--do_train requires a train dataset") train_dataset = raw_datasets["train"] if data_args.max_train_samples is not None: max_train_samples = min(len(train_dataset), data_args.max_train_samples) train_dataset = train_dataset.select(range(max_train_samples)) train_dataset = train_dataset.map( preprocess_function, batched=True, num_proc=data_args.preprocessing_num_workers, remove_columns=column_names, load_from_cache_file=not data_args.overwrite_cache, desc="Running tokenizer on train dataset", ) else: train_dataset = None if training_args.do_eval: max_target_length = data_args.val_max_target_length if "validation" not in raw_datasets: raise ValueError("--do_eval requires a validation dataset") eval_dataset = raw_datasets["validation"] if data_args.max_eval_samples is not None: max_eval_samples = min(len(eval_dataset), data_args.max_eval_samples) eval_dataset = eval_dataset.select(range(max_eval_samples)) eval_dataset = eval_dataset.map( preprocess_function, batched=True, num_proc=data_args.preprocessing_num_workers, remove_columns=column_names, load_from_cache_file=not data_args.overwrite_cache, desc="Running tokenizer on validation dataset", ) else: eval_dataset = None # endregion with training_args.strategy.scope(): # region Prepare model model = TFAutoModelForSeq2SeqLM.from_pretrained( model_args.model_name_or_path, config=config, cache_dir=model_args.cache_dir, revision=model_args.model_revision, token=model_args.token, trust_remote_code=model_args.trust_remote_code, ) # We resize the embeddings only when necessary to avoid index errors. If you are creating a model from scratch # on a small vocab and want a smaller embedding size, remove this test. embeddings = model.get_input_embeddings() # Matt: This is a temporary workaround as we transition our models to exclusively using Keras embeddings. # As soon as the transition is complete, all embeddings should be keras.Embeddings layers, and # the weights will always be in embeddings.embeddings. if hasattr(embeddings, "embeddings"): embedding_size = embeddings.embeddings.shape[0] else: embedding_size = embeddings.weight.shape[0] if len(tokenizer) > embedding_size: model.resize_token_embeddings(len(tokenizer)) if isinstance(tokenizer, tuple(MULTILINGUAL_TOKENIZERS)): model.config.forced_bos_token_id = forced_bos_token_id # endregion # region Set decoder_start_token_id if model.config.decoder_start_token_id is None and isinstance(tokenizer, (MBartTokenizer, MBartTokenizerFast)): assert ( data_args.target_lang is not None and data_args.source_lang is not None ), "mBart requires --target_lang and --source_lang" if isinstance(tokenizer, MBartTokenizer): model.config.decoder_start_token_id = tokenizer.lang_code_to_id[data_args.target_lang] else: model.config.decoder_start_token_id = tokenizer.convert_tokens_to_ids(data_args.target_lang) if model.config.decoder_start_token_id is None: raise ValueError("Make sure that `config.decoder_start_token_id` is correctly defined") # endregion # region Prepare TF Dataset objects label_pad_token_id = -100 if data_args.ignore_pad_token_for_loss else tokenizer.pad_token_id data_collator = DataCollatorForSeq2Seq( tokenizer, model=model, label_pad_token_id=label_pad_token_id, pad_to_multiple_of=64, # Reduce the number of unique shapes for XLA, especially for generation return_tensors="np", ) num_replicas = training_args.strategy.num_replicas_in_sync total_train_batch_size = training_args.per_device_train_batch_size * num_replicas total_eval_batch_size = training_args.per_device_eval_batch_size * num_replicas dataset_options = tf.data.Options() dataset_options.experimental_distribute.auto_shard_policy = tf.data.experimental.AutoShardPolicy.OFF # model.prepare_tf_dataset() wraps a Hugging Face dataset in a tf.data.Dataset which is ready to use in # training. This is the recommended way to use a Hugging Face dataset when training with Keras. You can also # use the lower-level dataset.to_tf_dataset() method, but you will have to specify things like column names # yourself if you use this method, whereas they are automatically inferred from the model input names when # using model.prepare_tf_dataset() # For more info see the docs: # https://huggingface.co/docs/transformers/main/en/main_classes/model#transformers.TFPreTrainedModel.prepare_tf_dataset # https://huggingface.co/docs/datasets/main/en/package_reference/main_classes#datasets.Dataset.to_tf_dataset tf_train_dataset = model.prepare_tf_dataset( train_dataset, collate_fn=data_collator, batch_size=total_train_batch_size, shuffle=True, ).with_options(dataset_options) tf_eval_dataset = model.prepare_tf_dataset( eval_dataset, collate_fn=data_collator, batch_size=total_eval_batch_size, shuffle=False ).with_options(dataset_options) # endregion # region Optimizer and LR scheduling num_train_steps = int(len(tf_train_dataset) * training_args.num_train_epochs) if training_args.warmup_steps > 0: num_warmup_steps = training_args.warmup_steps elif training_args.warmup_ratio > 0: num_warmup_steps = int(num_train_steps * training_args.warmup_ratio) else: num_warmup_steps = 0 if training_args.do_train: optimizer, lr_schedule = create_optimizer( init_lr=training_args.learning_rate, num_train_steps=num_train_steps, num_warmup_steps=num_warmup_steps, adam_beta1=training_args.adam_beta1, adam_beta2=training_args.adam_beta2, adam_epsilon=training_args.adam_epsilon, weight_decay_rate=training_args.weight_decay, adam_global_clipnorm=training_args.max_grad_norm, ) else: optimizer = None # endregion # region Metric and postprocessing if training_args.do_eval: metric = evaluate.load("sacrebleu", cache_dir=model_args.cache_dir) if data_args.val_max_target_length is None: data_args.val_max_target_length = data_args.max_target_length gen_kwargs = { "max_length": data_args.val_max_target_length, "num_beams": data_args.num_beams, "no_repeat_ngram_size": 0, # Not supported under XLA right now, and some models set it by default } def postprocess_text(preds, labels): preds = [pred.strip() for pred in preds] labels = [[label.strip()] for label in labels] return preds, labels def compute_metrics(preds): predictions, labels = preds if isinstance(predictions, tuple): predictions = predictions[0] decoded_preds = tokenizer.batch_decode(predictions, skip_special_tokens=True) labels = np.where(labels != -100, labels, tokenizer.pad_token_id) decoded_labels = tokenizer.batch_decode(labels, skip_special_tokens=True) decoded_preds, decoded_labels = postprocess_text(decoded_preds, decoded_labels) metrics = metric.compute(predictions=decoded_preds, references=decoded_labels) return {"bleu": metrics["score"]} # The KerasMetricCallback allows metrics that are too complex to write as standard Keras metrics # to be computed each epoch. Any Python code can be included in the metric_fn. This is especially # useful for metrics like BLEU and ROUGE that perform string comparisons on decoded model outputs. # For more information, see the docs at # https://huggingface.co/docs/transformers/main_classes/keras_callbacks#transformers.KerasMetricCallback metric_callback = KerasMetricCallback( metric_fn=compute_metrics, eval_dataset=tf_eval_dataset, predict_with_generate=True, use_xla_generation=True, generate_kwargs=gen_kwargs, ) callbacks = [metric_callback] else: callbacks = [] # endregion # region Preparing push_to_hub and model card push_to_hub_model_id = training_args.push_to_hub_model_id model_name = model_args.model_name_or_path.split("/")[-1] if not push_to_hub_model_id: push_to_hub_model_id = f"{model_name}-finetuned-{data_args.source_lang}-{data_args.target_lang}" model_card_kwargs = {"finetuned_from": model_args.model_name_or_path, "tasks": "translation"} if data_args.dataset_name is not None: model_card_kwargs["dataset_tags"] = data_args.dataset_name if data_args.dataset_config_name is not None: model_card_kwargs["dataset_args"] = data_args.dataset_config_name model_card_kwargs["dataset"] = f"{data_args.dataset_name} {data_args.dataset_config_name}" else: model_card_kwargs["dataset"] = data_args.dataset_name languages = [l for l in [data_args.source_lang, data_args.target_lang] if l is not None] if len(languages) > 0: model_card_kwargs["language"] = languages if training_args.push_to_hub: # Because this training can be quite long, we save once per epoch. callbacks.append( PushToHubCallback( output_dir=training_args.output_dir, hub_model_id=push_to_hub_model_id, hub_token=training_args.push_to_hub_token, tokenizer=tokenizer, **model_card_kwargs, ) ) # endregion # region Training eval_metrics = None # Transformers models compute the right loss for their task by default when labels are passed, and will # use this for training unless you specify your own loss function in compile(). model.compile(optimizer=optimizer, jit_compile=training_args.xla) if training_args.do_train: logger.info("***** Running training *****") logger.info(f" Num examples = {len(train_dataset)}") logger.info(f" Num Epochs = {training_args.num_train_epochs}") logger.info(f" Instantaneous batch size per device = {training_args.per_device_train_batch_size}") logger.info(f" Total train batch size = {total_train_batch_size}") logger.info(f" Total optimization steps = {num_train_steps}") if training_args.xla and not data_args.pad_to_max_length: logger.warning( "XLA training may be slow at first when --pad_to_max_length is not set " "until all possible shapes have been compiled." ) history = model.fit(tf_train_dataset, epochs=int(training_args.num_train_epochs), callbacks=callbacks) eval_metrics = {key: val[-1] for key, val in history.history.items()} # endregion # region Validation if training_args.do_eval and not training_args.do_train: # Compiling generation with XLA yields enormous speedups, see https://huggingface.co/blog/tf-xla-generate @tf.function(jit_compile=True) def generate(**kwargs): return model.generate(**kwargs) if training_args.do_eval: logger.info("Evaluation...") for batch, labels in tf_eval_dataset: batch.update(gen_kwargs) generated_tokens = generate(**batch) if isinstance(generated_tokens, tuple): generated_tokens = generated_tokens[0] decoded_preds = tokenizer.batch_decode(generated_tokens, skip_special_tokens=True) labels = np.where(labels != -100, labels, tokenizer.pad_token_id) decoded_labels = tokenizer.batch_decode(labels, skip_special_tokens=True) decoded_preds, decoded_labels = postprocess_text(decoded_preds, decoded_labels) metric.add_batch(predictions=decoded_preds, references=decoded_labels) eval_metrics = metric.compute() logger.info({"bleu": eval_metrics["score"]}) # endregion if training_args.output_dir is not None and eval_metrics is not None: output_eval_file = os.path.join(training_args.output_dir, "all_results.json") with open(output_eval_file, "w") as writer: writer.write(json.dumps(eval_metrics)) if training_args.output_dir is not None and not training_args.push_to_hub: # If we're not pushing to hub, at least save a local copy when we're done model.save_pretrained(training_args.output_dir) if __name__ == "__main__": main()

transformers/examples/tensorflow/translation/run_translation.py/0

{ "file_path": "transformers/examples/tensorflow/translation/run_translation.py", "repo_id": "transformers", "token_count": 13554 }

64

#!/usr/bin/env python # Copyright 2020 The HuggingFace Team. All rights reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. # Usage: # ./gen-card-allenai-wmt16.py import os from pathlib import Path def write_model_card(model_card_dir, src_lang, tgt_lang, model_name): texts = { "en": "Machine learning is great, isn't it?", "ru": "Машинное обучение - это здорово, не так ли?", "de": "Maschinelles Lernen ist großartig, nicht wahr?", } # BLUE scores as follows: # "pair": [fairseq, transformers] scores = { "wmt16-en-de-dist-12-1": [28.3, 27.52], "wmt16-en-de-dist-6-1": [27.4, 27.11], "wmt16-en-de-12-1": [26.9, 25.75], } pair = f"{src_lang}-{tgt_lang}" readme = f""" --- language: - {src_lang} - {tgt_lang} thumbnail: tags: - translation - wmt16 - allenai license: apache-2.0 datasets: - wmt16 metrics: - bleu --- # FSMT ## Model description This is a ported version of fairseq-based [wmt16 transformer](https://github.com/jungokasai/deep-shallow/) for {src_lang}-{tgt_lang}. For more details, please, see [Deep Encoder, Shallow Decoder: Reevaluating the Speed-Quality Tradeoff in Machine Translation](https://arxiv.org/abs/2006.10369). All 3 models are available: * [wmt16-en-de-dist-12-1](https://huggingface.co/allenai/wmt16-en-de-dist-12-1) * [wmt16-en-de-dist-6-1](https://huggingface.co/allenai/wmt16-en-de-dist-6-1) * [wmt16-en-de-12-1](https://huggingface.co/allenai/wmt16-en-de-12-1) ## Intended uses & limitations #### How to use ```python from transformers import FSMTForConditionalGeneration, FSMTTokenizer mname = "allenai/{model_name}" tokenizer = FSMTTokenizer.from_pretrained(mname) model = FSMTForConditionalGeneration.from_pretrained(mname) input = "{texts[src_lang]}" input_ids = tokenizer.encode(input, return_tensors="pt") outputs = model.generate(input_ids) decoded = tokenizer.decode(outputs[0], skip_special_tokens=True) print(decoded) # {texts[tgt_lang]} ``` #### Limitations and bias ## Training data Pretrained weights were left identical to the original model released by allenai. For more details, please, see the [paper](https://arxiv.org/abs/2006.10369). ## Eval results Here are the BLEU scores: model | fairseq | transformers -------|---------|---------- {model_name} | {scores[model_name][0]} | {scores[model_name][1]} The score is slightly below the score reported in the paper, as the researchers don't use `sacrebleu` and measure the score on tokenized outputs. `transformers` score was measured using `sacrebleu` on detokenized outputs. The score was calculated using this code: ```bash git clone https://github.com/huggingface/transformers cd transformers export PAIR={pair} export DATA_DIR=data/$PAIR export SAVE_DIR=data/$PAIR export BS=8 export NUM_BEAMS=5 mkdir -p $DATA_DIR sacrebleu -t wmt16 -l $PAIR --echo src > $DATA_DIR/val.source sacrebleu -t wmt16 -l $PAIR --echo ref > $DATA_DIR/val.target echo $PAIR PYTHONPATH="src:examples/seq2seq" python examples/seq2seq/run_eval.py allenai/{model_name} $DATA_DIR/val.source $SAVE_DIR/test_translations.txt --reference_path $DATA_DIR/val.target --score_path $SAVE_DIR/test_bleu.json --bs $BS --task translation --num_beams $NUM_BEAMS ``` ## Data Sources - [training, etc.](http://www.statmt.org/wmt16/) - [test set](http://matrix.statmt.org/test_sets/newstest2016.tgz?1504722372) ### BibTeX entry and citation info ``` @misc{{kasai2020deep, title={{Deep Encoder, Shallow Decoder: Reevaluating the Speed-Quality Tradeoff in Machine Translation}}, author={{Jungo Kasai and Nikolaos Pappas and Hao Peng and James Cross and Noah A. Smith}}, year={{2020}}, eprint={{2006.10369}}, archivePrefix={{arXiv}}, primaryClass={{cs.CL}} }} ``` """ model_card_dir.mkdir(parents=True, exist_ok=True) path = os.path.join(model_card_dir, "README.md") print(f"Generating {path}") with open(path, "w", encoding="utf-8") as f: f.write(readme) # make sure we are under the root of the project repo_dir = Path(__file__).resolve().parent.parent.parent model_cards_dir = repo_dir / "model_cards" for model_name in ["wmt16-en-de-dist-12-1", "wmt16-en-de-dist-6-1", "wmt16-en-de-12-1"]: model_card_dir = model_cards_dir / "allenai" / model_name write_model_card(model_card_dir, src_lang="en", tgt_lang="de", model_name=model_name)

transformers/scripts/fsmt/gen-card-allenai-wmt16.py/0

{ "file_path": "transformers/scripts/fsmt/gen-card-allenai-wmt16.py", "repo_id": "transformers", "token_count": 1885 }

65

# coding=utf-8 # Copyright 2018 The HuggingFace Inc. team. # Copyright (c) 2018, NVIDIA CORPORATION. All rights reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. from dataclasses import dataclass, field from typing import Tuple from ..utils import cached_property, is_torch_available, is_torch_tpu_available, logging, requires_backends from .benchmark_args_utils import BenchmarkArguments if is_torch_available(): import torch if is_torch_tpu_available(check_device=False): import torch_xla.core.xla_model as xm logger = logging.get_logger(__name__) @dataclass class PyTorchBenchmarkArguments(BenchmarkArguments): deprecated_args = [ "no_inference", "no_cuda", "no_tpu", "no_speed", "no_memory", "no_env_print", "no_multi_process", ] def __init__(self, **kwargs): """ This __init__ is there for legacy code. When removing deprecated args completely, the class can simply be deleted """ for deprecated_arg in self.deprecated_args: if deprecated_arg in kwargs: positive_arg = deprecated_arg[3:] setattr(self, positive_arg, not kwargs.pop(deprecated_arg)) logger.warning( f"{deprecated_arg} is depreciated. Please use --no_{positive_arg} or" f" {positive_arg}={kwargs[positive_arg]}" ) self.torchscript = kwargs.pop("torchscript", self.torchscript) self.torch_xla_tpu_print_metrics = kwargs.pop("torch_xla_tpu_print_metrics", self.torch_xla_tpu_print_metrics) self.fp16_opt_level = kwargs.pop("fp16_opt_level", self.fp16_opt_level) super().__init__(**kwargs) torchscript: bool = field(default=False, metadata={"help": "Trace the models using torchscript"}) torch_xla_tpu_print_metrics: bool = field(default=False, metadata={"help": "Print Xla/PyTorch tpu metrics"}) fp16_opt_level: str = field( default="O1", metadata={ "help": ( "For fp16: Apex AMP optimization level selected in ['O0', 'O1', 'O2', and 'O3']. " "See details at https://nvidia.github.io/apex/amp.html" ) }, ) @cached_property def _setup_devices(self) -> Tuple["torch.device", int]: requires_backends(self, ["torch"]) logger.info("PyTorch: setting up devices") if not self.cuda: device = torch.device("cpu") n_gpu = 0 elif is_torch_tpu_available(): device = xm.xla_device() n_gpu = 0 else: device = torch.device("cuda" if torch.cuda.is_available() else "cpu") n_gpu = torch.cuda.device_count() return device, n_gpu @property def is_tpu(self): return is_torch_tpu_available() and self.tpu @property def device_idx(self) -> int: requires_backends(self, ["torch"]) # TODO(PVP): currently only single GPU is supported return torch.cuda.current_device() @property def device(self) -> "torch.device": requires_backends(self, ["torch"]) return self._setup_devices[0] @property def n_gpu(self): requires_backends(self, ["torch"]) return self._setup_devices[1] @property def is_gpu(self): return self.n_gpu > 0

transformers/src/transformers/benchmark/benchmark_args.py/0

{ "file_path": "transformers/src/transformers/benchmark/benchmark_args.py", "repo_id": "transformers", "token_count": 1660 }

66

# Copyright 2020 The HuggingFace Team. All rights reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. import os from argparse import ArgumentParser, Namespace from ..data import SingleSentenceClassificationProcessor as Processor from ..pipelines import TextClassificationPipeline from ..utils import is_tf_available, is_torch_available, logging from . import BaseTransformersCLICommand if not is_tf_available() and not is_torch_available(): raise RuntimeError("At least one of PyTorch or TensorFlow 2.0+ should be installed to use CLI training") # TF training parameters USE_XLA = False USE_AMP = False def train_command_factory(args: Namespace): """ Factory function used to instantiate training command from provided command line arguments. Returns: TrainCommand """ return TrainCommand(args) class TrainCommand(BaseTransformersCLICommand): @staticmethod def register_subcommand(parser: ArgumentParser): """ Register this command to argparse so it's available for the transformer-cli Args: parser: Root parser to register command-specific arguments """ train_parser = parser.add_parser("train", help="CLI tool to train a model on a task.") train_parser.add_argument( "--train_data", type=str, required=True, help="path to train (and optionally evaluation) dataset as a csv with tab separated labels and sentences.", ) train_parser.add_argument( "--column_label", type=int, default=0, help="Column of the dataset csv file with example labels." ) train_parser.add_argument( "--column_text", type=int, default=1, help="Column of the dataset csv file with example texts." ) train_parser.add_argument( "--column_id", type=int, default=2, help="Column of the dataset csv file with example ids." ) train_parser.add_argument( "--skip_first_row", action="store_true", help="Skip the first row of the csv file (headers)." ) train_parser.add_argument("--validation_data", type=str, default="", help="path to validation dataset.") train_parser.add_argument( "--validation_split", type=float, default=0.1, help="if validation dataset is not provided, fraction of train dataset to use as validation dataset.", ) train_parser.add_argument("--output", type=str, default="./", help="path to saved the trained model.") train_parser.add_argument( "--task", type=str, default="text_classification", help="Task to train the model on." ) train_parser.add_argument( "--model", type=str, default="google-bert/bert-base-uncased", help="Model's name or path to stored model." ) train_parser.add_argument("--train_batch_size", type=int, default=32, help="Batch size for training.") train_parser.add_argument("--valid_batch_size", type=int, default=64, help="Batch size for validation.") train_parser.add_argument("--learning_rate", type=float, default=3e-5, help="Learning rate.") train_parser.add_argument("--adam_epsilon", type=float, default=1e-08, help="Epsilon for Adam optimizer.") train_parser.set_defaults(func=train_command_factory) def __init__(self, args: Namespace): self.logger = logging.get_logger("transformers-cli/training") self.framework = "tf" if is_tf_available() else "torch" os.makedirs(args.output, exist_ok=True) self.output = args.output self.column_label = args.column_label self.column_text = args.column_text self.column_id = args.column_id self.logger.info(f"Loading {args.task} pipeline for {args.model}") if args.task == "text_classification": self.pipeline = TextClassificationPipeline.from_pretrained(args.model) elif args.task == "token_classification": raise NotImplementedError elif args.task == "question_answering": raise NotImplementedError self.logger.info(f"Loading dataset from {args.train_data}") self.train_dataset = Processor.create_from_csv( args.train_data, column_label=args.column_label, column_text=args.column_text, column_id=args.column_id, skip_first_row=args.skip_first_row, ) self.valid_dataset = None if args.validation_data: self.logger.info(f"Loading validation dataset from {args.validation_data}") self.valid_dataset = Processor.create_from_csv( args.validation_data, column_label=args.column_label, column_text=args.column_text, column_id=args.column_id, skip_first_row=args.skip_first_row, ) self.validation_split = args.validation_split self.train_batch_size = args.train_batch_size self.valid_batch_size = args.valid_batch_size self.learning_rate = args.learning_rate self.adam_epsilon = args.adam_epsilon def run(self): if self.framework == "tf": return self.run_tf() return self.run_torch() def run_torch(self): raise NotImplementedError def run_tf(self): self.pipeline.fit( self.train_dataset, validation_data=self.valid_dataset, validation_split=self.validation_split, learning_rate=self.learning_rate, adam_epsilon=self.adam_epsilon, train_batch_size=self.train_batch_size, valid_batch_size=self.valid_batch_size, ) # Save trained pipeline self.pipeline.save_pretrained(self.output)

transformers/src/transformers/commands/train.py/0

{ "file_path": "transformers/src/transformers/commands/train.py", "repo_id": "transformers", "token_count": 2539 }

67

# Copyright 2020 The HuggingFace Team. All rights reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. """ Very heavily inspired by the official evaluation script for SQuAD version 2.0 which was modified by XLNet authors to update `find_best_threshold` scripts for SQuAD V2.0 In addition to basic functionality, we also compute additional statistics and plot precision-recall curves if an additional na_prob.json file is provided. This file is expected to map question ID's to the model's predicted probability that a question is unanswerable. """ import collections import json import math import re import string from ...models.bert import BasicTokenizer from ...utils import logging logger = logging.get_logger(__name__) def normalize_answer(s): """Lower text and remove punctuation, articles and extra whitespace.""" def remove_articles(text): regex = re.compile(r"\b(a|an|the)\b", re.UNICODE) return re.sub(regex, " ", text) def white_space_fix(text): return " ".join(text.split()) def remove_punc(text): exclude = set(string.punctuation) return "".join(ch for ch in text if ch not in exclude) def lower(text): return text.lower() return white_space_fix(remove_articles(remove_punc(lower(s)))) def get_tokens(s): if not s: return [] return normalize_answer(s).split() def compute_exact(a_gold, a_pred): return int(normalize_answer(a_gold) == normalize_answer(a_pred)) def compute_f1(a_gold, a_pred): gold_toks = get_tokens(a_gold) pred_toks = get_tokens(a_pred) common = collections.Counter(gold_toks) & collections.Counter(pred_toks) num_same = sum(common.values()) if len(gold_toks) == 0 or len(pred_toks) == 0: # If either is no-answer, then F1 is 1 if they agree, 0 otherwise return int(gold_toks == pred_toks) if num_same == 0: return 0 precision = 1.0 * num_same / len(pred_toks) recall = 1.0 * num_same / len(gold_toks) f1 = (2 * precision * recall) / (precision + recall) return f1 def get_raw_scores(examples, preds): """ Computes the exact and f1 scores from the examples and the model predictions """ exact_scores = {} f1_scores = {} for example in examples: qas_id = example.qas_id gold_answers = [answer["text"] for answer in example.answers if normalize_answer(answer["text"])] if not gold_answers: # For unanswerable questions, only correct answer is empty string gold_answers = [""] if qas_id not in preds: print(f"Missing prediction for {qas_id}") continue prediction = preds[qas_id] exact_scores[qas_id] = max(compute_exact(a, prediction) for a in gold_answers) f1_scores[qas_id] = max(compute_f1(a, prediction) for a in gold_answers) return exact_scores, f1_scores def apply_no_ans_threshold(scores, na_probs, qid_to_has_ans, na_prob_thresh): new_scores = {} for qid, s in scores.items(): pred_na = na_probs[qid] > na_prob_thresh if pred_na: new_scores[qid] = float(not qid_to_has_ans[qid]) else: new_scores[qid] = s return new_scores def make_eval_dict(exact_scores, f1_scores, qid_list=None): if not qid_list: total = len(exact_scores) return collections.OrderedDict( [ ("exact", 100.0 * sum(exact_scores.values()) / total), ("f1", 100.0 * sum(f1_scores.values()) / total), ("total", total), ] ) else: total = len(qid_list) return collections.OrderedDict( [ ("exact", 100.0 * sum(exact_scores[k] for k in qid_list) / total), ("f1", 100.0 * sum(f1_scores[k] for k in qid_list) / total), ("total", total), ] ) def merge_eval(main_eval, new_eval, prefix): for k in new_eval: main_eval[f"{prefix}_{k}"] = new_eval[k] def find_best_thresh_v2(preds, scores, na_probs, qid_to_has_ans): num_no_ans = sum(1 for k in qid_to_has_ans if not qid_to_has_ans[k]) cur_score = num_no_ans best_score = cur_score best_thresh = 0.0 qid_list = sorted(na_probs, key=lambda k: na_probs[k]) for i, qid in enumerate(qid_list): if qid not in scores: continue if qid_to_has_ans[qid]: diff = scores[qid] else: if preds[qid]: diff = -1 else: diff = 0 cur_score += diff if cur_score > best_score: best_score = cur_score best_thresh = na_probs[qid] has_ans_score, has_ans_cnt = 0, 0 for qid in qid_list: if not qid_to_has_ans[qid]: continue has_ans_cnt += 1 if qid not in scores: continue has_ans_score += scores[qid] return 100.0 * best_score / len(scores), best_thresh, 1.0 * has_ans_score / has_ans_cnt def find_all_best_thresh_v2(main_eval, preds, exact_raw, f1_raw, na_probs, qid_to_has_ans): best_exact, exact_thresh, has_ans_exact = find_best_thresh_v2(preds, exact_raw, na_probs, qid_to_has_ans) best_f1, f1_thresh, has_ans_f1 = find_best_thresh_v2(preds, f1_raw, na_probs, qid_to_has_ans) main_eval["best_exact"] = best_exact main_eval["best_exact_thresh"] = exact_thresh main_eval["best_f1"] = best_f1 main_eval["best_f1_thresh"] = f1_thresh main_eval["has_ans_exact"] = has_ans_exact main_eval["has_ans_f1"] = has_ans_f1 def find_best_thresh(preds, scores, na_probs, qid_to_has_ans): num_no_ans = sum(1 for k in qid_to_has_ans if not qid_to_has_ans[k]) cur_score = num_no_ans best_score = cur_score best_thresh = 0.0 qid_list = sorted(na_probs, key=lambda k: na_probs[k]) for _, qid in enumerate(qid_list): if qid not in scores: continue if qid_to_has_ans[qid]: diff = scores[qid] else: if preds[qid]: diff = -1 else: diff = 0 cur_score += diff if cur_score > best_score: best_score = cur_score best_thresh = na_probs[qid] return 100.0 * best_score / len(scores), best_thresh def find_all_best_thresh(main_eval, preds, exact_raw, f1_raw, na_probs, qid_to_has_ans): best_exact, exact_thresh = find_best_thresh(preds, exact_raw, na_probs, qid_to_has_ans) best_f1, f1_thresh = find_best_thresh(preds, f1_raw, na_probs, qid_to_has_ans) main_eval["best_exact"] = best_exact main_eval["best_exact_thresh"] = exact_thresh main_eval["best_f1"] = best_f1 main_eval["best_f1_thresh"] = f1_thresh def squad_evaluate(examples, preds, no_answer_probs=None, no_answer_probability_threshold=1.0): qas_id_to_has_answer = {example.qas_id: bool(example.answers) for example in examples} has_answer_qids = [qas_id for qas_id, has_answer in qas_id_to_has_answer.items() if has_answer] no_answer_qids = [qas_id for qas_id, has_answer in qas_id_to_has_answer.items() if not has_answer] if no_answer_probs is None: no_answer_probs = {k: 0.0 for k in preds} exact, f1 = get_raw_scores(examples, preds) exact_threshold = apply_no_ans_threshold( exact, no_answer_probs, qas_id_to_has_answer, no_answer_probability_threshold ) f1_threshold = apply_no_ans_threshold(f1, no_answer_probs, qas_id_to_has_answer, no_answer_probability_threshold) evaluation = make_eval_dict(exact_threshold, f1_threshold) if has_answer_qids: has_ans_eval = make_eval_dict(exact_threshold, f1_threshold, qid_list=has_answer_qids) merge_eval(evaluation, has_ans_eval, "HasAns") if no_answer_qids: no_ans_eval = make_eval_dict(exact_threshold, f1_threshold, qid_list=no_answer_qids) merge_eval(evaluation, no_ans_eval, "NoAns") if no_answer_probs: find_all_best_thresh(evaluation, preds, exact, f1, no_answer_probs, qas_id_to_has_answer) return evaluation def get_final_text(pred_text, orig_text, do_lower_case, verbose_logging=False): """Project the tokenized prediction back to the original text.""" # When we created the data, we kept track of the alignment between original # (whitespace tokenized) tokens and our WordPiece tokenized tokens. So # now `orig_text` contains the span of our original text corresponding to the # span that we predicted. # # However, `orig_text` may contain extra characters that we don't want in # our prediction. # # For example, let's say: # pred_text = steve smith # orig_text = Steve Smith's # # We don't want to return `orig_text` because it contains the extra "'s". # # We don't want to return `pred_text` because it's already been normalized # (the SQuAD eval script also does punctuation stripping/lower casing but # our tokenizer does additional normalization like stripping accent # characters). # # What we really want to return is "Steve Smith". # # Therefore, we have to apply a semi-complicated alignment heuristic between # `pred_text` and `orig_text` to get a character-to-character alignment. This # can fail in certain cases in which case we just return `orig_text`. def _strip_spaces(text): ns_chars = [] ns_to_s_map = collections.OrderedDict() for i, c in enumerate(text): if c == " ": continue ns_to_s_map[len(ns_chars)] = i ns_chars.append(c) ns_text = "".join(ns_chars) return (ns_text, ns_to_s_map) # We first tokenize `orig_text`, strip whitespace from the result # and `pred_text`, and check if they are the same length. If they are # NOT the same length, the heuristic has failed. If they are the same # length, we assume the characters are one-to-one aligned. tokenizer = BasicTokenizer(do_lower_case=do_lower_case) tok_text = " ".join(tokenizer.tokenize(orig_text)) start_position = tok_text.find(pred_text) if start_position == -1: if verbose_logging: logger.info(f"Unable to find text: '{pred_text}' in '{orig_text}'") return orig_text end_position = start_position + len(pred_text) - 1 (orig_ns_text, orig_ns_to_s_map) = _strip_spaces(orig_text) (tok_ns_text, tok_ns_to_s_map) = _strip_spaces(tok_text) if len(orig_ns_text) != len(tok_ns_text): if verbose_logging: logger.info(f"Length not equal after stripping spaces: '{orig_ns_text}' vs '{tok_ns_text}'") return orig_text # We then project the characters in `pred_text` back to `orig_text` using # the character-to-character alignment. tok_s_to_ns_map = {} for i, tok_index in tok_ns_to_s_map.items(): tok_s_to_ns_map[tok_index] = i orig_start_position = None if start_position in tok_s_to_ns_map: ns_start_position = tok_s_to_ns_map[start_position] if ns_start_position in orig_ns_to_s_map: orig_start_position = orig_ns_to_s_map[ns_start_position] if orig_start_position is None: if verbose_logging: logger.info("Couldn't map start position") return orig_text orig_end_position = None if end_position in tok_s_to_ns_map: ns_end_position = tok_s_to_ns_map[end_position] if ns_end_position in orig_ns_to_s_map: orig_end_position = orig_ns_to_s_map[ns_end_position] if orig_end_position is None: if verbose_logging: logger.info("Couldn't map end position") return orig_text output_text = orig_text[orig_start_position : (orig_end_position + 1)] return output_text def _get_best_indexes(logits, n_best_size): """Get the n-best logits from a list.""" index_and_score = sorted(enumerate(logits), key=lambda x: x[1], reverse=True) best_indexes = [] for i in range(len(index_and_score)): if i >= n_best_size: break best_indexes.append(index_and_score[i][0]) return best_indexes def _compute_softmax(scores): """Compute softmax probability over raw logits.""" if not scores: return [] max_score = None for score in scores: if max_score is None or score > max_score: max_score = score exp_scores = [] total_sum = 0.0 for score in scores: x = math.exp(score - max_score) exp_scores.append(x) total_sum += x probs = [] for score in exp_scores: probs.append(score / total_sum) return probs def compute_predictions_logits( all_examples, all_features, all_results, n_best_size, max_answer_length, do_lower_case, output_prediction_file, output_nbest_file, output_null_log_odds_file, verbose_logging, version_2_with_negative, null_score_diff_threshold, tokenizer, ): """Write final predictions to the json file and log-odds of null if needed.""" if output_prediction_file: logger.info(f"Writing predictions to: {output_prediction_file}") if output_nbest_file: logger.info(f"Writing nbest to: {output_nbest_file}") if output_null_log_odds_file and version_2_with_negative: logger.info(f"Writing null_log_odds to: {output_null_log_odds_file}") example_index_to_features = collections.defaultdict(list) for feature in all_features: example_index_to_features[feature.example_index].append(feature) unique_id_to_result = {} for result in all_results: unique_id_to_result[result.unique_id] = result _PrelimPrediction = collections.namedtuple( # pylint: disable=invalid-name "PrelimPrediction", ["feature_index", "start_index", "end_index", "start_logit", "end_logit"] ) all_predictions = collections.OrderedDict() all_nbest_json = collections.OrderedDict() scores_diff_json = collections.OrderedDict() for example_index, example in enumerate(all_examples): features = example_index_to_features[example_index] prelim_predictions = [] # keep track of the minimum score of null start+end of position 0 score_null = 1000000 # large and positive min_null_feature_index = 0 # the paragraph slice with min null score null_start_logit = 0 # the start logit at the slice with min null score null_end_logit = 0 # the end logit at the slice with min null score for feature_index, feature in enumerate(features): result = unique_id_to_result[feature.unique_id] start_indexes = _get_best_indexes(result.start_logits, n_best_size) end_indexes = _get_best_indexes(result.end_logits, n_best_size) # if we could have irrelevant answers, get the min score of irrelevant if version_2_with_negative: feature_null_score = result.start_logits[0] + result.end_logits[0] if feature_null_score < score_null: score_null = feature_null_score min_null_feature_index = feature_index null_start_logit = result.start_logits[0] null_end_logit = result.end_logits[0] for start_index in start_indexes: for end_index in end_indexes: # We could hypothetically create invalid predictions, e.g., predict # that the start of the span is in the question. We throw out all # invalid predictions. if start_index >= len(feature.tokens): continue if end_index >= len(feature.tokens): continue if start_index not in feature.token_to_orig_map: continue if end_index not in feature.token_to_orig_map: continue if not feature.token_is_max_context.get(start_index, False): continue if end_index < start_index: continue length = end_index - start_index + 1 if length > max_answer_length: continue prelim_predictions.append( _PrelimPrediction( feature_index=feature_index, start_index=start_index, end_index=end_index, start_logit=result.start_logits[start_index], end_logit=result.end_logits[end_index], ) ) if version_2_with_negative: prelim_predictions.append( _PrelimPrediction( feature_index=min_null_feature_index, start_index=0, end_index=0, start_logit=null_start_logit, end_logit=null_end_logit, ) ) prelim_predictions = sorted(prelim_predictions, key=lambda x: (x.start_logit + x.end_logit), reverse=True) _NbestPrediction = collections.namedtuple( # pylint: disable=invalid-name "NbestPrediction", ["text", "start_logit", "end_logit"] ) seen_predictions = {} nbest = [] for pred in prelim_predictions: if len(nbest) >= n_best_size: break feature = features[pred.feature_index] if pred.start_index > 0: # this is a non-null prediction tok_tokens = feature.tokens[pred.start_index : (pred.end_index + 1)] orig_doc_start = feature.token_to_orig_map[pred.start_index] orig_doc_end = feature.token_to_orig_map[pred.end_index] orig_tokens = example.doc_tokens[orig_doc_start : (orig_doc_end + 1)] tok_text = tokenizer.convert_tokens_to_string(tok_tokens) # tok_text = " ".join(tok_tokens) # # # De-tokenize WordPieces that have been split off. # tok_text = tok_text.replace(" ##", "") # tok_text = tok_text.replace("##", "") # Clean whitespace tok_text = tok_text.strip() tok_text = " ".join(tok_text.split()) orig_text = " ".join(orig_tokens) final_text = get_final_text(tok_text, orig_text, do_lower_case, verbose_logging) if final_text in seen_predictions: continue seen_predictions[final_text] = True else: final_text = "" seen_predictions[final_text] = True nbest.append(_NbestPrediction(text=final_text, start_logit=pred.start_logit, end_logit=pred.end_logit)) # if we didn't include the empty option in the n-best, include it if version_2_with_negative: if "" not in seen_predictions: nbest.append(_NbestPrediction(text="", start_logit=null_start_logit, end_logit=null_end_logit)) # In very rare edge cases we could only have single null prediction. # So we just create a nonce prediction in this case to avoid failure. if len(nbest) == 1: nbest.insert(0, _NbestPrediction(text="empty", start_logit=0.0, end_logit=0.0)) # In very rare edge cases we could have no valid predictions. So we # just create a nonce prediction in this case to avoid failure. if not nbest: nbest.append(_NbestPrediction(text="empty", start_logit=0.0, end_logit=0.0)) if len(nbest) < 1: raise ValueError("No valid predictions") total_scores = [] best_non_null_entry = None for entry in nbest: total_scores.append(entry.start_logit + entry.end_logit) if not best_non_null_entry: if entry.text: best_non_null_entry = entry probs = _compute_softmax(total_scores) nbest_json = [] for i, entry in enumerate(nbest): output = collections.OrderedDict() output["text"] = entry.text output["probability"] = probs[i] output["start_logit"] = entry.start_logit output["end_logit"] = entry.end_logit nbest_json.append(output) if len(nbest_json) < 1: raise ValueError("No valid predictions") if not version_2_with_negative: all_predictions[example.qas_id] = nbest_json[0]["text"] else: # predict "" iff the null score - the score of best non-null > threshold score_diff = score_null - best_non_null_entry.start_logit - (best_non_null_entry.end_logit) scores_diff_json[example.qas_id] = score_diff if score_diff > null_score_diff_threshold: all_predictions[example.qas_id] = "" else: all_predictions[example.qas_id] = best_non_null_entry.text all_nbest_json[example.qas_id] = nbest_json if output_prediction_file: with open(output_prediction_file, "w") as writer: writer.write(json.dumps(all_predictions, indent=4) + "\n") if output_nbest_file: with open(output_nbest_file, "w") as writer: writer.write(json.dumps(all_nbest_json, indent=4) + "\n") if output_null_log_odds_file and version_2_with_negative: with open(output_null_log_odds_file, "w") as writer: writer.write(json.dumps(scores_diff_json, indent=4) + "\n") return all_predictions def compute_predictions_log_probs( all_examples, all_features, all_results, n_best_size, max_answer_length, output_prediction_file, output_nbest_file, output_null_log_odds_file, start_n_top, end_n_top, version_2_with_negative, tokenizer, verbose_logging, ): """ XLNet write prediction logic (more complex than Bert's). Write final predictions to the json file and log-odds of null if needed. Requires utils_squad_evaluate.py """ _PrelimPrediction = collections.namedtuple( # pylint: disable=invalid-name "PrelimPrediction", ["feature_index", "start_index", "end_index", "start_log_prob", "end_log_prob"] ) _NbestPrediction = collections.namedtuple( # pylint: disable=invalid-name "NbestPrediction", ["text", "start_log_prob", "end_log_prob"] ) logger.info(f"Writing predictions to: {output_prediction_file}") example_index_to_features = collections.defaultdict(list) for feature in all_features: example_index_to_features[feature.example_index].append(feature) unique_id_to_result = {} for result in all_results: unique_id_to_result[result.unique_id] = result all_predictions = collections.OrderedDict() all_nbest_json = collections.OrderedDict() scores_diff_json = collections.OrderedDict() for example_index, example in enumerate(all_examples): features = example_index_to_features[example_index] prelim_predictions = [] # keep track of the minimum score of null start+end of position 0 score_null = 1000000 # large and positive for feature_index, feature in enumerate(features): result = unique_id_to_result[feature.unique_id] cur_null_score = result.cls_logits # if we could have irrelevant answers, get the min score of irrelevant score_null = min(score_null, cur_null_score) for i in range(start_n_top): for j in range(end_n_top): start_log_prob = result.start_logits[i] start_index = result.start_top_index[i] j_index = i * end_n_top + j end_log_prob = result.end_logits[j_index] end_index = result.end_top_index[j_index] # We could hypothetically create invalid predictions, e.g., predict # that the start of the span is in the question. We throw out all # invalid predictions. if start_index >= feature.paragraph_len - 1: continue if end_index >= feature.paragraph_len - 1: continue if not feature.token_is_max_context.get(start_index, False): continue if end_index < start_index: continue length = end_index - start_index + 1 if length > max_answer_length: continue prelim_predictions.append( _PrelimPrediction( feature_index=feature_index, start_index=start_index, end_index=end_index, start_log_prob=start_log_prob, end_log_prob=end_log_prob, ) ) prelim_predictions = sorted( prelim_predictions, key=lambda x: (x.start_log_prob + x.end_log_prob), reverse=True ) seen_predictions = {} nbest = [] for pred in prelim_predictions: if len(nbest) >= n_best_size: break feature = features[pred.feature_index] # XLNet un-tokenizer # Let's keep it simple for now and see if we need all this later. # # tok_start_to_orig_index = feature.tok_start_to_orig_index # tok_end_to_orig_index = feature.tok_end_to_orig_index # start_orig_pos = tok_start_to_orig_index[pred.start_index] # end_orig_pos = tok_end_to_orig_index[pred.end_index] # paragraph_text = example.paragraph_text # final_text = paragraph_text[start_orig_pos: end_orig_pos + 1].strip() # Previously used Bert untokenizer tok_tokens = feature.tokens[pred.start_index : (pred.end_index + 1)] orig_doc_start = feature.token_to_orig_map[pred.start_index] orig_doc_end = feature.token_to_orig_map[pred.end_index] orig_tokens = example.doc_tokens[orig_doc_start : (orig_doc_end + 1)] tok_text = tokenizer.convert_tokens_to_string(tok_tokens) # Clean whitespace tok_text = tok_text.strip() tok_text = " ".join(tok_text.split()) orig_text = " ".join(orig_tokens) if hasattr(tokenizer, "do_lower_case"): do_lower_case = tokenizer.do_lower_case else: do_lower_case = tokenizer.do_lowercase_and_remove_accent final_text = get_final_text(tok_text, orig_text, do_lower_case, verbose_logging) if final_text in seen_predictions: continue seen_predictions[final_text] = True nbest.append( _NbestPrediction(text=final_text, start_log_prob=pred.start_log_prob, end_log_prob=pred.end_log_prob) ) # In very rare edge cases we could have no valid predictions. So we # just create a nonce prediction in this case to avoid failure. if not nbest: nbest.append(_NbestPrediction(text="", start_log_prob=-1e6, end_log_prob=-1e6)) total_scores = [] best_non_null_entry = None for entry in nbest: total_scores.append(entry.start_log_prob + entry.end_log_prob) if not best_non_null_entry: best_non_null_entry = entry probs = _compute_softmax(total_scores) nbest_json = [] for i, entry in enumerate(nbest): output = collections.OrderedDict() output["text"] = entry.text output["probability"] = probs[i] output["start_log_prob"] = entry.start_log_prob output["end_log_prob"] = entry.end_log_prob nbest_json.append(output) if len(nbest_json) < 1: raise ValueError("No valid predictions") if best_non_null_entry is None: raise ValueError("No valid predictions") score_diff = score_null scores_diff_json[example.qas_id] = score_diff # note(zhiliny): always predict best_non_null_entry # and the evaluation script will search for the best threshold all_predictions[example.qas_id] = best_non_null_entry.text all_nbest_json[example.qas_id] = nbest_json with open(output_prediction_file, "w") as writer: writer.write(json.dumps(all_predictions, indent=4) + "\n") with open(output_nbest_file, "w") as writer: writer.write(json.dumps(all_nbest_json, indent=4) + "\n") if version_2_with_negative: with open(output_null_log_odds_file, "w") as writer: writer.write(json.dumps(scores_diff_json, indent=4) + "\n") return all_predictions

transformers/src/transformers/data/metrics/squad_metrics.py/0

{ "file_path": "transformers/src/transformers/data/metrics/squad_metrics.py", "repo_id": "transformers", "token_count": 13819 }

68

# coding=utf-8 # Copyright 2020 The HuggingFace Inc. team # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. from abc import ABC, abstractmethod from collections import UserDict from typing import Dict, List, Optional, Tuple, Union import numpy as np import torch from ..utils import add_start_docstrings from .beam_constraints import Constraint, ConstraintListState PROCESS_INPUTS_DOCSTRING = r""" Args: input_ids (`torch.LongTensor` of shape `(batch_size * num_beams, sequence_length)`): Indices of input sequence tokens in the vocabulary. Indices can be obtained using any class inheriting from [`PreTrainedTokenizer`]. See [`PreTrainedTokenizer.encode`] and [`PreTrainedTokenizer.__call__`] for details. [What are input IDs?](../glossary#input-ids) next_scores (`torch.FloatTensor` of shape `(batch_size, 2 * num_beams)`): Current scores of the top `2 * num_beams` non-finished beam hypotheses. next_tokens (`torch.LongTensor` of shape `(batch_size, 2 * num_beams)`): `input_ids` of the tokens corresponding to the top `2 * num_beams` non-finished beam hypotheses. next_indices (`torch.LongTensor` of shape `(batch_size, 2 * num_beams)`): Beam indices indicating to which beam hypothesis the `next_tokens` correspond. pad_token_id (`int`, *optional*): The id of the *padding* token. eos_token_id (`Union[int, List[int]]`, *optional*): The id of the *end-of-sequence* token. Optionally, use a list to set multiple *end-of-sequence* tokens. beam_indices (`torch.LongTensor`, *optional*): Beam indices indicating to which beam hypothesis each token correspond. group_index (`int`, *optional*): The index of the group of beams. Used with [`~PreTrainedModel.group_beam_search`]. Return: `UserDict`: A dictionary composed of the fields as defined above: - **next_beam_scores** (`torch.FloatTensor` of shape `(batch_size * num_beams)`) -- Updated scores of all non-finished beams. - **next_beam_tokens** (`torch.FloatTensor` of shape `(batch_size * num_beams)`) -- Next tokens to be added to the non-finished beam_hypotheses. - **next_beam_indices** (`torch.FloatTensor` of shape `(batch_size * num_beams)`) -- Beam indices indicating to which beam the next tokens shall be added. """ FINALIZE_INPUTS_DOCSTRING = r""" Args: input_ids (`torch.LongTensor` of shape `(batch_size * num_beams, sequence_length)`): Indices of input sequence tokens in the vocabulary. Indices can be obtained using any class inheriting from [`PreTrainedTokenizer`]. See [`PreTrainedTokenizer.encode`] and [`PreTrainedTokenizer.__call__`] for details. [What are input IDs?](../glossary#input-ids) final_beam_scores (`torch.FloatTensor` of shape `(batch_size * num_beams)`): The final scores of all non-finished beams. final_beam_tokens (`torch.FloatTensor` of shape `(batch_size * num_beams)`): The last tokens to be added to the non-finished beam_hypotheses. final_beam_indices (`torch.FloatTensor` of shape `(batch_size * num_beams)`): The beam indices indicating to which beam the `final_beam_tokens` shall be added. pad_token_id (`int`, *optional*): The id of the *padding* token. eos_token_id (`Union[int, List[int]]`, *optional*): The id of the *end-of-sequence* token. Optionally, use a list to set multiple *end-of-sequence* tokens. Return: `torch.LongTensor` of shape `(batch_size * num_return_sequences, sequence_length)`: The generated sequences. The second dimension (sequence_length) is either equal to `max_length` or shorter if all batches finished early due to the `eos_token_id`. """ class BeamScorer(ABC): """ Abstract base class for all beam scorers that are used for [`~PreTrainedModel.beam_search`] and [`~PreTrainedModel.beam_sample`]. """ @abstractmethod @add_start_docstrings(PROCESS_INPUTS_DOCSTRING) def process( self, input_ids: torch.LongTensor, next_scores: torch.FloatTensor, next_tokens: torch.LongTensor, next_indices: torch.LongTensor, **kwargs, ) -> Tuple[torch.Tensor]: raise NotImplementedError("This is an abstract method.") @abstractmethod @add_start_docstrings(FINALIZE_INPUTS_DOCSTRING) def finalize( self, input_ids: torch.LongTensor, next_scores: torch.FloatTensor, next_tokens: torch.LongTensor, next_indices: torch.LongTensor, max_length: int, **kwargs, ) -> torch.LongTensor: raise NotImplementedError("This is an abstract method.") class BeamSearchScorer(BeamScorer): r""" [`BeamScorer`] implementing standard beam search decoding. Adapted in part from [Facebook's XLM beam search code](https://github.com/facebookresearch/XLM/blob/9e6f6814d17be4fe5b15f2e6c43eb2b2d76daeb4/src/model/transformer.py#L529). Reference for the diverse beam search algorithm and implementation [Ashwin Kalyan's DBS implementation](https://github.com/ashwinkalyan/dbs/blob/master/dbs/beam_utils.lua) Args: batch_size (`int`): Batch Size of `input_ids` for which standard beam search decoding is run in parallel. num_beams (`int`): Number of beams for beam search. device (`torch.device`): Defines the device type (*e.g.*, `"cpu"` or `"cuda"`) on which this instance of `BeamSearchScorer` will be allocated. length_penalty (`float`, *optional*, defaults to 1.0): Exponential penalty to the length that is used with beam-based generation. It is applied as an exponent to the sequence length, which in turn is used to divide the score of the sequence. Since the score is the log likelihood of the sequence (i.e. negative), `length_penalty` > 0.0 promotes longer sequences, while `length_penalty` < 0.0 encourages shorter sequences. do_early_stopping (`bool` or `str`, *optional*, defaults to `False`): Controls the stopping condition for beam-based methods, like beam-search. It accepts the following values: `True`, where the generation stops as soon as there are `num_beams` complete candidates; `False`, where an heuristic is applied and the generation stops when is it very unlikely to find better candidates; `"never"`, where the beam search procedure only stops when there cannot be better candidates (canonical beam search algorithm). num_beam_hyps_to_keep (`int`, *optional*, defaults to 1): The number of beam hypotheses that shall be returned upon calling [`~transformers.BeamSearchScorer.finalize`]. num_beam_groups (`int`, *optional*, defaults to 1): Number of groups to divide `num_beams` into in order to ensure diversity among different groups of beams. See [this paper](https://arxiv.org/pdf/1610.02424.pdf) for more details. max_length (`int`, *optional*): The maximum length of the sequence to be generated. """ def __init__( self, batch_size: int, num_beams: int, device: torch.device, length_penalty: Optional[float] = 1.0, do_early_stopping: Optional[Union[bool, str]] = False, num_beam_hyps_to_keep: Optional[int] = 1, num_beam_groups: Optional[int] = 1, max_length: Optional[int] = None, ): self.num_beams = num_beams self.device = device self.length_penalty = length_penalty self.do_early_stopping = do_early_stopping self.num_beam_hyps_to_keep = num_beam_hyps_to_keep self.num_beam_groups = num_beam_groups self.group_size = self.num_beams // self.num_beam_groups self._is_init = False # self._beam_hyps[i*self.num_beam_groups+j] is the beam_hyps of the j-th group in the i-th mini-batch. # If group_beam_search is not used, the list consists of `batch_size` beam_hyps. self._beam_hyps = [ BeamHypotheses( num_beams=self.group_size, length_penalty=self.length_penalty, early_stopping=self.do_early_stopping, max_length=max_length, ) for _ in range(batch_size * self.num_beam_groups) ] # self._done[i*self.num_beam_groups+j] indicates whether the generation of the beam_hyps of the j-th group # in the i-th mini-batch is complete. self._done = torch.tensor( [False for _ in range(batch_size * self.num_beam_groups)], dtype=torch.bool, device=self.device ) if not isinstance(num_beams, int) or num_beams <= 1: raise ValueError( f"`num_beams` has to be an integer strictly greater than 1, but is {num_beams}. For `num_beams` == 1," " one should make use of `greedy_search` instead." ) if not isinstance(num_beam_groups, int) or (num_beam_groups > num_beams) or (num_beams % num_beam_groups != 0): raise ValueError( "`num_beam_groups` has to be an integer smaller or equal than `num_beams` and `num_beams` has to be" f" divisible by `num_beam_groups`, but is {num_beam_groups} with `num_beams` being {num_beams}." ) @property def is_done(self) -> bool: return self._done.all() def process( self, input_ids: torch.LongTensor, next_scores: torch.FloatTensor, next_tokens: torch.LongTensor, next_indices: torch.LongTensor, pad_token_id: Optional[int] = None, eos_token_id: Optional[Union[int, List[int]]] = None, beam_indices: Optional[torch.LongTensor] = None, group_index: Optional[int] = 0, decoder_prompt_len: Optional[int] = 0, ) -> Dict[str, torch.Tensor]: # add up to the length which the next_scores is calculated on (including decoder prompt) cur_len = input_ids.shape[-1] + 1 batch_size = len(self._beam_hyps) // self.num_beam_groups if not (batch_size == (input_ids.shape[0] // self.group_size)): if self.num_beam_groups > 1: raise ValueError( f"A group beam size of {input_ids.shape[0]} is used as the input, but a group beam " f"size of {self.group_size} is expected by the beam scorer." ) else: raise ValueError( f"A beam size of {input_ids.shape[0]} is used as the input, but a beam size of " f"{self.group_size} is expected by the beam scorer." ) device = input_ids.device next_beam_scores = torch.zeros((batch_size, self.group_size), dtype=next_scores.dtype, device=device) next_beam_tokens = torch.zeros((batch_size, self.group_size), dtype=next_tokens.dtype, device=device) next_beam_indices = torch.zeros((batch_size, self.group_size), dtype=next_indices.dtype, device=device) if isinstance(eos_token_id, int): eos_token_id = [eos_token_id] for batch_idx in range(batch_size): batch_group_idx = batch_idx * self.num_beam_groups + group_index if self._done[batch_group_idx]: if self.num_beams < len(self._beam_hyps[batch_group_idx]): raise ValueError(f"Batch can only be done if at least {self.num_beams} beams have been generated") if eos_token_id is None or pad_token_id is None: raise ValueError("Generated beams >= num_beams -> eos_token_id and pad_token have to be defined") # pad the batch next_beam_scores[batch_idx, :] = 0 next_beam_tokens[batch_idx, :] = pad_token_id next_beam_indices[batch_idx, :] = 0 continue # next tokens for this sentence beam_idx = 0 for beam_token_rank, (next_token, next_score, next_index) in enumerate( zip(next_tokens[batch_idx], next_scores[batch_idx], next_indices[batch_idx]) ): batch_beam_idx = batch_idx * self.group_size + next_index # add to generated hypotheses if end of sentence if (eos_token_id is not None) and (next_token.item() in eos_token_id): # if beam_token does not belong to top num_beams tokens, it should not be added is_beam_token_worse_than_top_num_beams = beam_token_rank >= self.group_size if is_beam_token_worse_than_top_num_beams: continue if beam_indices is not None: beam_index = beam_indices[batch_beam_idx] beam_index = beam_index + (batch_beam_idx,) else: beam_index = None self._beam_hyps[batch_group_idx].add( input_ids[batch_beam_idx].clone(), next_score.item(), beam_indices=beam_index, generated_len=cur_len - decoder_prompt_len, ) else: # add next predicted token since it is not eos_token next_beam_scores[batch_idx, beam_idx] = next_score next_beam_tokens[batch_idx, beam_idx] = next_token next_beam_indices[batch_idx, beam_idx] = batch_beam_idx beam_idx += 1 # once the beam for next step is full, don't add more tokens to it. if beam_idx == self.group_size: break if beam_idx < self.group_size: raise ValueError( f"At most {self.group_size} tokens in {next_tokens[batch_idx]} can be equal to `eos_token_id:" f" {eos_token_id}`. Make sure {next_tokens[batch_idx]} are corrected." ) # Check if we are done so that we can save a pad step if all(done) self._done[batch_group_idx] = self._done[batch_group_idx] or self._beam_hyps[batch_group_idx].is_done( next_scores[batch_idx].max().item(), cur_len, decoder_prompt_len ) return UserDict( { "next_beam_scores": next_beam_scores.view(-1), "next_beam_tokens": next_beam_tokens.view(-1), "next_beam_indices": next_beam_indices.view(-1), } ) def finalize( self, input_ids: torch.LongTensor, final_beam_scores: torch.FloatTensor, final_beam_tokens: torch.LongTensor, final_beam_indices: torch.LongTensor, max_length: int, pad_token_id: Optional[int] = None, eos_token_id: Optional[Union[int, List[int]]] = None, beam_indices: Optional[torch.LongTensor] = None, decoder_prompt_len: Optional[int] = 0, ) -> Tuple[torch.LongTensor]: batch_size = len(self._beam_hyps) // self.num_beam_groups if isinstance(eos_token_id, int): eos_token_id = [eos_token_id] # finalize all open beam hypotheses and add to generated hypotheses for batch_group_idx, beam_hyp in enumerate(self._beam_hyps): if self._done[batch_group_idx]: continue # all open beam hypotheses are added to the beam hypothesis # beam hypothesis class automatically keeps the best beams for index_per_group in range(self.group_size): batch_beam_idx = batch_group_idx * self.group_size + index_per_group final_score = final_beam_scores[batch_beam_idx].item() final_tokens = input_ids[batch_beam_idx] beam_index = beam_indices[batch_beam_idx] if beam_indices is not None else None generated_len = final_tokens.shape[-1] - decoder_prompt_len beam_hyp.add(final_tokens, final_score, beam_indices=beam_index, generated_len=generated_len) # select the best hypotheses sent_lengths = input_ids.new(batch_size * self.num_beam_hyps_to_keep) best = [] best_indices = [] best_scores = torch.zeros(batch_size * self.num_beam_hyps_to_keep, device=self.device, dtype=torch.float32) # retrieve best hypotheses for i in range(batch_size): beam_hyps_in_batch = self._beam_hyps[i * self.num_beam_groups : (i + 1) * self.num_beam_groups] candidate_beams = [beam for beam_hyp in beam_hyps_in_batch for beam in beam_hyp.beams] sorted_hyps = sorted(candidate_beams, key=lambda x: x[0]) for j in range(self.num_beam_hyps_to_keep): best_hyp_tuple = sorted_hyps.pop() best_score = best_hyp_tuple[0] best_hyp = best_hyp_tuple[1] best_index = best_hyp_tuple[2] sent_lengths[self.num_beam_hyps_to_keep * i + j] = len(best_hyp) # append hyp to lists best.append(best_hyp) # append indices to list best_indices.append(best_index) best_scores[i * self.num_beam_hyps_to_keep + j] = best_score # prepare for adding eos sent_lengths_max = sent_lengths.max().item() + 1 sent_max_len = min(sent_lengths_max, max_length) if max_length is not None else sent_lengths_max decoded: torch.LongTensor = input_ids.new(batch_size * self.num_beam_hyps_to_keep, sent_max_len) if len(best_indices) > 0 and best_indices[0] is not None: indices: torch.LongTensor = input_ids.new(batch_size * self.num_beam_hyps_to_keep, sent_max_len) else: indices = None # shorter batches are padded if needed if sent_lengths.min().item() != sent_lengths.max().item(): if pad_token_id is None: raise ValueError("`pad_token_id` has to be defined") decoded.fill_(pad_token_id) if indices is not None: indices.fill_(-1) # fill with hypotheses and eos_token_id if the latter fits in for i, (hypo, best_idx) in enumerate(zip(best, best_indices)): decoded[i, : sent_lengths[i]] = hypo if indices is not None: indices[i, : len(best_idx)] = torch.tensor(best_idx) if sent_lengths[i] < sent_max_len: # inserting only the first eos_token_id decoded[i, sent_lengths[i]] = eos_token_id[0] return UserDict( { "sequences": decoded, "sequence_scores": best_scores, "beam_indices": indices, } ) class ConstrainedBeamSearchScorer(BeamScorer): r""" [`BeamScorer`] implementing constrained beam search decoding. Args: batch_size (`int`): Batch Size of `input_ids` for which standard beam search decoding is run in parallel. num_beams (`int`): Number of beams for beam search. constraints (`List[Constraint]`): A list of positive constraints represented as `Constraint` objects that must be fulfilled in the generation output. For more information, the documentation of [`Constraint`] should be read. device (`torch.device`): Defines the device type (*e.g.*, `"cpu"` or `"cuda"`) on which this instance of `BeamSearchScorer` will be allocated. length_penalty (`float`, *optional*, defaults to 1.0): Exponential penalty to the length that is used with beam-based generation. It is applied as an exponent to the sequence length, which in turn is used to divide the score of the sequence. Since the score is the log likelihood of the sequence (i.e. negative), `length_penalty` > 0.0 promotes longer sequences, while `length_penalty` < 0.0 encourages shorter sequences. do_early_stopping (`bool` or `str`, *optional*, defaults to `False`): Controls the stopping condition for beam-based methods, like beam-search. It accepts the following values: `True`, where the generation stops as soon as there are `num_beams` complete candidates; `False`, where an heuristic is applied and the generation stops when is it very unlikely to find better candidates; `"never"`, where the beam search procedure only stops when there cannot be better candidates (canonical beam search algorithm). num_beam_hyps_to_keep (`int`, *optional*, defaults to 1): The number of beam hypotheses that shall be returned upon calling [`~transformers.BeamSearchScorer.finalize`]. num_beam_groups (`int`, *optional*, defaults to 1): Number of groups to divide `num_beams` into in order to ensure diversity among different groups of beams. See [this paper](https://arxiv.org/pdf/1610.02424.pdf) for more details. max_length (`int`, *optional*): The maximum length of the sequence to be generated. """ def __init__( self, batch_size: int, num_beams: int, constraints: List[Constraint], device: torch.device, length_penalty: Optional[float] = 1.0, do_early_stopping: Optional[Union[bool, str]] = False, num_beam_hyps_to_keep: Optional[int] = 1, num_beam_groups: Optional[int] = 1, max_length: Optional[int] = None, ): self.num_beams = num_beams self.device = device self.length_penalty = length_penalty self.do_early_stopping = do_early_stopping self.num_beam_hyps_to_keep = num_beam_hyps_to_keep self.num_beam_groups = num_beam_groups self.group_size = self.num_beams // self.num_beam_groups self.constraints = constraints self._is_init = False self._beam_hyps = [ BeamHypotheses( num_beams=self.num_beams, length_penalty=self.length_penalty, early_stopping=self.do_early_stopping, max_length=max_length, ) for _ in range(batch_size) ] self._done = torch.tensor([False for _ in range(batch_size)], dtype=torch.bool, device=self.device) if not isinstance(num_beams, int) or num_beams <= 1: raise ValueError( f"`num_beams` has to be an integer strictly greater than 1, but is {num_beams}. For `num_beams` == 1," " one should make use of `greedy_search` instead." ) if not isinstance(num_beam_groups, int) or (num_beam_groups > num_beams) or (num_beams % num_beam_groups != 0): raise ValueError( "`num_beam_groups` has to be an integer smaller or equal than `num_beams` and `num_beams` has to be" f" divisible by `num_beam_groups`, but is {num_beam_groups} with `num_beams` being {num_beams}." ) @property def is_done(self) -> bool: return self._done.all() def make_constraint_states(self, n): return [ConstraintListState([constraint.copy() for constraint in self.constraints]) for _ in range(n)] def check_completes_constraints(self, sequence): new_state = self.make_constraint_states(1)[0] new_state.reset(sequence) return new_state.completed def process( self, input_ids: torch.LongTensor, next_scores: torch.FloatTensor, next_tokens: torch.LongTensor, next_indices: torch.LongTensor, scores_for_all_vocab: torch.FloatTensor, pad_token_id: Optional[int] = None, eos_token_id: Optional[Union[int, List[int]]] = None, beam_indices: Optional[torch.LongTensor] = None, decoder_prompt_len: Optional[int] = 0, ) -> Tuple[torch.Tensor]: r""" Args: input_ids (`torch.LongTensor` of shape `(batch_size * num_beams, sequence_length)`): Indices of input sequence tokens in the vocabulary. Indices can be obtained using any class inheriting from [`PreTrainedTokenizer`]. See [`PreTrainedTokenizer.encode`] and [`PreTrainedTokenizer.__call__`] for details. [What are input IDs?](../glossary#input-ids) next_scores (`torch.FloatTensor` of shape `(batch_size, 2 * num_beams)`): Current scores of the top `2 * num_beams` non-finished beam hypotheses. next_tokens (`torch.LongTensor` of shape `(batch_size, 2 * num_beams)`): `input_ids` of the tokens corresponding to the top `2 * num_beams` non-finished beam hypotheses. next_indices (`torch.LongTensor` of shape `(batch_size, 2 * num_beams)`): Beam indices indicating to which beam hypothesis the `next_tokens` correspond. scores_for_all_vocab (`torch.FloatTensor` of shape `(batch_size * num_beams, sequence_length)`): The scores of all tokens in the vocabulary for each of the beam hypotheses. pad_token_id (`int`, *optional*): The id of the *padding* token. eos_token_id (`Union[int, List[int]]`, *optional*): The id of the *end-of-sequence* token. Optionally, use a list to set multiple *end-of-sequence* tokens. beam_indices (`torch.LongTensor`, *optional*): Beam indices indicating to which beam hypothesis each token correspond. decoder_prompt_len (`int`, *optional*): The length of prompt that is included in the input to decoder. Return: `UserDict`: A dictionary composed of the fields as defined above: - **next_beam_scores** (`torch.FloatTensor` of shape `(batch_size * num_beams)`) -- Updated scores of all non-finished beams. - **next_beam_tokens** (`torch.FloatTensor` of shape `(batch_size * num_beams)`) -- Next tokens to be added to the non-finished beam_hypotheses. - **next_beam_indices** (`torch.FloatTensor` of shape `(batch_size * num_beams)`) -- Beam indices indicating to which beam the next tokens shall be added. """ # add up to the length which the next_scores is calculated on (including decoder prompt) cur_len = input_ids.shape[-1] + 1 batch_size = len(self._beam_hyps) if not (batch_size == (input_ids.shape[0] // self.group_size)): if self.num_beam_groups > 1: raise ValueError( f"A group beam size of {input_ids.shape[0]} is used as the input, but a group beam " f"size of {self.group_size} is expected by the beam scorer." ) else: raise ValueError( f"A beam size of {input_ids.shape[0]} is used as the input, but a beam size of " f"{self.group_size} is expected by the beam scorer." ) device = input_ids.device next_beam_scores = torch.zeros((batch_size, self.group_size), dtype=next_scores.dtype, device=device) next_beam_tokens = torch.zeros((batch_size, self.group_size), dtype=next_tokens.dtype, device=device) next_beam_indices = torch.zeros((batch_size, self.group_size), dtype=next_indices.dtype, device=device) if isinstance(eos_token_id, int): eos_token_id = [eos_token_id] for batch_idx, beam_hyp in enumerate(self._beam_hyps): if self._done[batch_idx]: if self.num_beams < len(beam_hyp): raise ValueError(f"Batch can only be done if at least {self.num_beams} beams have been generated") if eos_token_id is None or pad_token_id is None: raise ValueError("Generated beams >= num_beams -> eos_token_id and pad_token have to be defined") # pad the batch next_beam_scores[batch_idx, :] = 0 next_beam_tokens[batch_idx, :] = pad_token_id next_beam_indices[batch_idx, :] = 0 continue # next tokens for this sentence. beam_idx = 0 for beam_token_rank, (next_token, next_score, next_index) in enumerate( zip(next_tokens[batch_idx], next_scores[batch_idx], next_indices[batch_idx]) ): batch_beam_idx = batch_idx * self.group_size + next_index # add to generated hypotheses if end of sentence if (eos_token_id is not None) and (next_token.item() in eos_token_id): # if beam_token does not belong to top num_beams tokens, it should not be added is_beam_token_worse_than_top_num_beams = beam_token_rank >= self.group_size if is_beam_token_worse_than_top_num_beams: continue completes_constraint = self.check_completes_constraints(input_ids[batch_beam_idx].cpu().tolist()) if completes_constraint: if beam_indices is not None: beam_index = beam_indices[batch_beam_idx] beam_index = beam_index + (batch_beam_idx,) else: beam_index = None beam_hyp.add( input_ids[batch_beam_idx].clone(), next_score.item(), beam_indices=beam_index, generated_len=cur_len - decoder_prompt_len, ) else: # add next predicted token since it is not eos_token next_beam_scores[batch_idx, beam_idx] = next_score next_beam_tokens[batch_idx, beam_idx] = next_token next_beam_indices[batch_idx, beam_idx] = batch_beam_idx beam_idx += 1 # once the beam for next step is full, don't add more tokens to it. if beam_idx == self.group_size: break new_scores, new_tokens, new_indices = self.step_sentence_constraint( batch_idx, input_ids, scores_for_all_vocab, next_beam_scores[batch_idx], next_beam_tokens[batch_idx], next_beam_indices[batch_idx], ) next_beam_scores[batch_idx] = new_scores next_beam_tokens[batch_idx] = new_tokens next_beam_indices[batch_idx] = new_indices if beam_idx < self.group_size: raise ValueError( f"At most {self.group_size} tokens in {next_tokens[batch_idx]} can be equal to `eos_token_id:" f" {eos_token_id}`. Make sure {next_tokens[batch_idx]} are corrected." ) # Check if we are done so that we can save a pad step if all(done) self._done[batch_idx] = self._done[batch_idx] or beam_hyp.is_done( next_scores[batch_idx].max().item(), cur_len, decoder_prompt_len ) return UserDict( { "next_beam_scores": next_beam_scores.view(-1), "next_beam_tokens": next_beam_tokens.view(-1), "next_beam_indices": next_beam_indices.view(-1), } ) def step_sentence_constraint( self, batch_idx: int, input_ids: torch.LongTensor, vocab_scores: torch.FloatTensor, sent_beam_scores: torch.FloatTensor, sent_beam_tokens: torch.LongTensor, sent_beam_indices: torch.LongTensor, push_progress: bool = False, ): # sent_beam_tokens are the next {num_beams} number of tokens that are under consideration for this beam # (candidate next tokens) # 1. Adding "advance_tokens" # using ConstraintStateList.advance(), we propose new tokens to be added into this "candidate list" that will # advance us in fulfilling the constraints. # 2. Selecting best candidates such that we end up with highest probable candidates # that fulfill our constraints. orig_len = sent_beam_indices.size(0) device = sent_beam_indices.device # initialize states topk_contraint_states = self.make_constraint_states(orig_len) advance_constraint_states = self.make_constraint_states(orig_len) sidx, eidx = batch_idx * orig_len, (batch_idx + 1) * orig_len this_batch_input_ids = input_ids[sidx:eidx] this_batch_token_scores = vocab_scores[sidx:eidx] full_hypotheses = torch.cat((input_ids[sent_beam_indices], sent_beam_tokens.unsqueeze(-1)), dim=-1) # need to make new hypothesis that advance the constraints track_new = { "new_seqs": full_hypotheses.tolist(), "new_states": [], "new_indices": [], "new_tokens": [], "new_scores": [], } for seq_idx, pre_seq in enumerate(this_batch_input_ids): # pre_seq = ith sequence generated before this step. # input_ids -> (topk) generic beam search best model next tokens # -> (advance) constraints forcing the next token # either way, we need to sort them into "banks" later, so store a "ConstraintListState" for all types of # hypotheses. topk_state = topk_contraint_states[seq_idx] topk_state.reset(full_hypotheses[seq_idx].cpu().tolist()) advance_state = advance_constraint_states[seq_idx] advance_state.reset(pre_seq.cpu().tolist()) if not advance_state.completed: advance_tokens = torch.LongTensor(advance_state.advance()).to(device) for advance_token in advance_tokens: # since adding each `advance_token` leads to a different hypothesis, create new state instance. new_state = advance_state.copy(stateful=True) new_state.add(advance_token.cpu().tolist()) advance_seq = torch.cat((pre_seq, advance_token.unsqueeze(0)), -1).cpu().tolist() if advance_seq not in track_new["new_seqs"]: # prevent duplicates, which are basically bound to happen in this process. track_new["new_seqs"].append(advance_seq) track_new["new_indices"].append(sidx + seq_idx) # idx -> global idx across all the batches track_new["new_tokens"].append(advance_token) track_new["new_scores"].append(this_batch_token_scores[seq_idx].take(advance_token)) track_new["new_states"].append(new_state) elif push_progress: # Basically, `sent_beam_indices` often chooses very little among `input_ids` the generated sequences that # actually fulfill our constraints. For example, let constraints == ["loves pies"] and # pre_seq_1 = "The child loves pies and" pre_seq_2 = "The child plays in the playground and" # Without this step, if `sent_beam_indices` is something like [1,1], then # 1. `pre_seq_1` won't be added to the list of (topk) hypothesis since it's not in the indices and # 2. it won't be added to the list of (advance) hypothesis since it's completed already. (this is # the else part of `if constraints_completed[seq_idx]`) # 3. it ends up simply getting removed from consideration. # #3 might be fine and actually desired, since it's likely that it's a low-probability output anyways, # especially if it's not in the list of `sent_beam_indices`. But this often leads to lengthened beam # search times, since completed sequences keep getting removed after all this effort for constrained # generation. # Here, we basically take `pre_seq_1` and to "push" it into the considered list of hypotheses, by simply # appending the next likely token in the vocabulary and adding it to the list of hypotheses. new_score, new_token = torch.max(this_batch_token_scores[seq_idx], 0) # some next probable token advance_seq = torch.cat((pre_seq, new_token.unsqueeze(0)), -1) advance_state = advance_constraint_states[seq_idx] advance_seq = advance_seq.cpu().tolist() advance_state.reset(advance_seq) if advance_seq not in track_new["new_seqs"]: # but still don't want to have duplicates track_new["new_seqs"].append(advance_seq) track_new["new_indices"].append(seq_idx) track_new["new_tokens"].append(new_token) track_new["new_scores"].append(new_score) track_new["new_states"].append(advance_state) if len(track_new["new_indices"]) > 0: new_indices = torch.tensor(track_new["new_indices"]).to(device) new_tokens = torch.stack(track_new["new_tokens"]).to(device) new_scores = torch.stack(track_new["new_scores"]).to(device) all_states = topk_contraint_states + track_new["new_states"] all_tokens = torch.cat((sent_beam_tokens, new_tokens), -1) all_scores = torch.cat((sent_beam_scores, new_scores), -1) all_banks = torch.tensor([one.get_bank() for one in all_states]).to(device) zipped = all_banks * 100 + all_scores indices = zipped.sort(descending=True).indices sorted_banks = all_banks[indices] # Then we end up with {sorted among bank C}, {sorted among bank C-1}, ..., {sorted among bank 0} counter = -1 cur_bank = sorted_banks[0] increments = [] for bank in sorted_banks: if bank == cur_bank: counter += 1 else: counter = 0 cur_bank = bank increments.append(counter) rearrangers = torch.tensor(np.argsort(increments, kind="mergesort")) indices = indices[rearrangers][:orig_len] sent_beam_scores = all_scores[indices] sent_beam_tokens = all_tokens[indices] sent_beam_indices = torch.cat((sent_beam_indices, new_indices))[indices] return sent_beam_scores, sent_beam_tokens, sent_beam_indices def finalize( self, input_ids: torch.LongTensor, final_beam_scores: torch.FloatTensor, final_beam_tokens: torch.LongTensor, final_beam_indices: torch.LongTensor, max_length: int, pad_token_id: Optional[int] = None, eos_token_id: Optional[Union[int, List[int]]] = None, beam_indices: Optional[torch.LongTensor] = None, decoder_prompt_len: Optional[int] = 0, ) -> Tuple[torch.LongTensor]: batch_size = len(self._beam_hyps) if isinstance(eos_token_id, int): eos_token_id = [eos_token_id] # finalize all open beam hypotheses and add to generated hypotheses for batch_idx, beam_hyp in enumerate(self._beam_hyps): if self._done[batch_idx]: continue # all open beam hypotheses are added to the beam hypothesis # beam hypothesis class automatically keeps the best beams ids_collect = [] for beam_id in range(self.num_beams): batch_beam_idx = batch_idx * self.num_beams + beam_id final_score = final_beam_scores[batch_beam_idx].item() final_tokens = input_ids[batch_beam_idx] completes_constraint = self.check_completes_constraints(final_tokens.cpu().tolist()) if completes_constraint: beam_index = beam_indices[batch_beam_idx] if beam_indices is not None else None generated_len = final_tokens.shape[-1] - decoder_prompt_len beam_hyp.add(final_tokens, final_score, beam_indices=beam_index, generated_len=generated_len) ids_collect.append(beam_id) # due to overly complex constraints or other factors, sometimes we can't gaurantee a successful # generation. In these cases we simply return the highest scoring outputs. if len(ids_collect) < self.num_beam_hyps_to_keep: for beam_id in range(self.num_beams): if beam_id not in ids_collect: batch_beam_idx = batch_idx * self.num_beams + beam_id final_score = final_beam_scores[batch_beam_idx].item() final_tokens = input_ids[batch_beam_idx] generated_len = final_tokens.shape[-1] - decoder_prompt_len beam_hyp.add(final_tokens, final_score, generated_len=generated_len) if len(ids_collect) >= self.num_beam_hyps_to_keep: break # select the best hypotheses sent_lengths = input_ids.new(batch_size * self.num_beam_hyps_to_keep) best = [] best_indices = [] best_scores = torch.zeros(batch_size * self.num_beam_hyps_to_keep, device=self.device, dtype=torch.float32) # retrieve best hypotheses for i, beam_hyp in enumerate(self._beam_hyps): sorted_hyps = sorted(beam_hyp.beams, key=lambda x: x[0]) for j in range(self.num_beam_hyps_to_keep): best_hyp_tuple = sorted_hyps.pop() best_score = best_hyp_tuple[0] best_hyp = best_hyp_tuple[1] best_index = best_hyp_tuple[2] sent_lengths[self.num_beam_hyps_to_keep * i + j] = len(best_hyp) # append to lists best.append(best_hyp) # append indices to list best_indices.append(best_index) best_scores[i * self.num_beam_hyps_to_keep + j] = best_score # prepare for adding eos sent_lengths_max = sent_lengths.max().item() + 1 sent_max_len = min(sent_lengths_max, max_length) if max_length is not None else sent_lengths_max decoded: torch.LongTensor = input_ids.new(batch_size * self.num_beam_hyps_to_keep, sent_max_len) if len(best_indices) > 0 and best_indices[0] is not None: indices: torch.LongTensor = input_ids.new(batch_size * self.num_beam_hyps_to_keep, sent_max_len) else: indices = None # shorter batches are padded if needed if sent_lengths.min().item() != sent_lengths.max().item(): if pad_token_id is None: raise ValueError("`pad_token_id` has to be defined") decoded.fill_(pad_token_id) if indices is not None: indices.fill_(-1) # fill with hypotheses and eos_token_id if the latter fits in for i, (hypo, best_idx) in enumerate(zip(best, best_indices)): decoded[i, : sent_lengths[i]] = hypo if indices is not None: indices[i, : len(best_idx)] = torch.tensor(best_idx) if sent_lengths[i] < sent_max_len: # inserting only the first eos_token_id decoded[i, sent_lengths[i]] = eos_token_id[0] return UserDict( { "sequences": decoded, "sequence_scores": best_scores, "beam_indices": indices, } ) class BeamHypotheses: def __init__(self, num_beams: int, length_penalty: float, early_stopping: bool, max_length: Optional[int] = None): """ Initialize n-best list of hypotheses. """ self.length_penalty = length_penalty self.early_stopping = early_stopping self.max_length = max_length self.num_beams = num_beams self.beams = [] self.worst_score = 1e9 if not isinstance(self.early_stopping, bool) and self.max_length is None: raise ValueError( "When `do_early_stopping` is set to a string, `max_length` must be defined. Ensure it is passed to the" " BeamScorer class instance at initialization time." ) def __len__(self): """ Number of hypotheses in the list. """ return len(self.beams) def add( self, hyp: torch.LongTensor, sum_logprobs: float, beam_indices: Optional[torch.LongTensor] = None, generated_len: Optional[int] = None, ): """ Add a new hypothesis to the list. """ if generated_len is not None: score = sum_logprobs / (generated_len**self.length_penalty) # This 'else' case exists for retrocompatibility else: score = sum_logprobs / (hyp.shape[-1] ** self.length_penalty) if len(self) < self.num_beams or score > self.worst_score: self.beams.append((score, hyp, beam_indices)) if len(self) > self.num_beams: sorted_next_scores = sorted([(s, idx) for idx, (s, _, _) in enumerate(self.beams)]) del self.beams[sorted_next_scores[0][1]] self.worst_score = sorted_next_scores[1][0] else: self.worst_score = min(score, self.worst_score) def is_done(self, best_sum_logprobs: float, cur_len: int, decoder_prompt_len: Optional[int] = 0) -> bool: """ If there are enough hypotheses and that none of the hypotheses being generated can become better than the worst one in the heap, then we are done with this sentence. """ if len(self) < self.num_beams: return False # `True`: stop as soon as at least `num_beams` hypotheses are finished if self.early_stopping is True: return True # `False`: heuristic -- compute best possible score from `cur_len`, even though it is not entirely accurate # when `length_penalty` is positive. See the discussion below for more details. # https://github.com/huggingface/transformers/pull/20901#issuecomment-1369845565 elif self.early_stopping is False: highest_attainable_score = best_sum_logprobs / (cur_len - decoder_prompt_len) ** self.length_penalty ret = self.worst_score >= highest_attainable_score return ret # `"never"`: compute the best possible score, depending on the signal of `length_penalty` else: # `length_penalty` > 0.0 -> max denominator is obtaned from `max_length`, not from `cur_len` -> min # abs(`highest_attainable_score`) is obtained -> `highest_attainable_score` is negative, hence we obtain # its max this way if self.length_penalty > 0.0: if self.max_length <= decoder_prompt_len: raise ValueError("max_length is not larger than decoder prompt length") highest_attainable_score = ( best_sum_logprobs / (self.max_length - decoder_prompt_len) ** self.length_penalty ) # the opposite logic applies here (max `highest_attainable_score` from `cur_len`) else: highest_attainable_score = best_sum_logprobs / (cur_len - decoder_prompt_len) ** self.length_penalty ret = self.worst_score >= highest_attainable_score return ret

transformers/src/transformers/generation/beam_search.py/0

{ "file_path": "transformers/src/transformers/generation/beam_search.py", "repo_id": "transformers", "token_count": 22653 }

69

#include <torch/extension.h> #include <ATen/ATen.h> #include "cuda_launch.h" #include <vector> std::vector<at::Tensor> index_max( at::Tensor index_vals, at::Tensor indices, int A_num_block, int B_num_block ) { return index_max_kernel( index_vals, indices, A_num_block, B_num_block ); } at::Tensor mm_to_sparse( at::Tensor dense_A, at::Tensor dense_B, at::Tensor indices ) { return mm_to_sparse_kernel( dense_A, dense_B, indices ); } at::Tensor sparse_dense_mm( at::Tensor sparse_A, at::Tensor indices, at::Tensor dense_B, int A_num_block ) { return sparse_dense_mm_kernel( sparse_A, indices, dense_B, A_num_block ); } at::Tensor reduce_sum( at::Tensor sparse_A, at::Tensor indices, int A_num_block, int B_num_block ) { return reduce_sum_kernel( sparse_A, indices, A_num_block, B_num_block ); } at::Tensor scatter( at::Tensor dense_A, at::Tensor indices, int B_num_block ) { return scatter_kernel( dense_A, indices, B_num_block ); } PYBIND11_MODULE(TORCH_EXTENSION_NAME, m) { m.def("index_max", &index_max, "index_max (CUDA)"); m.def("mm_to_sparse", &mm_to_sparse, "mm_to_sparse (CUDA)"); m.def("sparse_dense_mm", &sparse_dense_mm, "sparse_dense_mm (CUDA)"); m.def("reduce_sum", &reduce_sum, "reduce_sum (CUDA)"); m.def("scatter", &scatter, "scatter (CUDA)"); }

transformers/src/transformers/kernels/mra/torch_extension.cpp/0

{ "file_path": "transformers/src/transformers/kernels/mra/torch_extension.cpp", "repo_id": "transformers", "token_count": 655 }

70

# coding=utf-8 # Copyright 2021 The Google Flax Team Authors and The HuggingFace Inc. team. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. import gc import json import os import re import warnings from functools import partial from pickle import UnpicklingError from typing import Any, Dict, Optional, Set, Tuple, Union import flax.linen as nn import jax import jax.numpy as jnp import msgpack.exceptions from flax.core.frozen_dict import FrozenDict, unfreeze from flax.serialization import from_bytes, to_bytes from flax.traverse_util import flatten_dict, unflatten_dict from jax.random import PRNGKey from .configuration_utils import PretrainedConfig from .dynamic_module_utils import custom_object_save from .generation import FlaxGenerationMixin, GenerationConfig from .modeling_flax_pytorch_utils import load_pytorch_checkpoint_in_flax_state_dict from .utils import ( FLAX_WEIGHTS_INDEX_NAME, FLAX_WEIGHTS_NAME, SAFE_WEIGHTS_INDEX_NAME, SAFE_WEIGHTS_NAME, WEIGHTS_INDEX_NAME, WEIGHTS_NAME, PushToHubMixin, add_code_sample_docstrings, add_start_docstrings_to_model_forward, cached_file, copy_func, download_url, has_file, is_offline_mode, is_remote_url, logging, replace_return_docstrings, ) from .utils.hub import convert_file_size_to_int, get_checkpoint_shard_files from .utils.import_utils import is_safetensors_available if is_safetensors_available(): from safetensors import safe_open from safetensors.flax import load_file as safe_load_file from safetensors.flax import save_file as safe_save_file logger = logging.get_logger(__name__) def quick_gelu(x): return x * jax.nn.sigmoid(1.702 * x) ACT2FN = { "gelu": partial(nn.gelu, approximate=False), "relu": nn.relu, "silu": nn.swish, "swish": nn.swish, "gelu_new": partial(nn.gelu, approximate=True), "quick_gelu": quick_gelu, } def dtype_byte_size(dtype): """ Returns the size (in bytes) occupied by one parameter of type `dtype`. Example: ```py >>> dtype_byte_size(np.float32) 4 ``` """ if dtype == bool: return 1 / 8 bit_search = re.search(r"[^\d](\d+)$", dtype.name) if bit_search is None: raise ValueError(f"`dtype` is not a valid dtype: {dtype}.") bit_size = int(bit_search.groups()[0]) return bit_size // 8 def flax_shard_checkpoint(params, max_shard_size="10GB"): """ Splits a model state dictionary in sub-checkpoints so that the final size of each sub-checkpoint does not exceed a given size. The sub-checkpoints are determined by iterating through the `state_dict` in the order of its keys, so there is no optimization made to make each sub-checkpoint as close as possible to the maximum size passed. For example, if the limit is 10GB and we have weights of sizes [6GB, 6GB, 2GB, 6GB, 2GB, 2GB] they will get sharded as [6GB], [6+2GB], [6+2+2GB] and not [6+2+2GB], [6+2GB], [6GB]. <Tip warning={true}> If one of the model's weight is bigger that `max_shard_size`, it will end up in its own sub-checkpoint which will have a size greater than `max_shard_size`. </Tip> Args: params (`Union[Dict, FrozenDict]`): A `PyTree` of model parameters. max_shard_size (`int` or `str`, *optional*, defaults to `"10GB"`): The maximum size of each sub-checkpoint. If expressed as a string, needs to be digits followed by a unit (like `"5MB"`). """ max_shard_size = convert_file_size_to_int(max_shard_size) sharded_state_dicts = [] current_block = {} current_block_size = 0 total_size = 0 # flatten the weights to chunk weights = flatten_dict(params, sep="/") for item in weights: weight_size = weights[item].size * dtype_byte_size(weights[item].dtype) # If this weight is going to tip up over the maximal size, we split. if current_block_size + weight_size > max_shard_size: sharded_state_dicts.append(current_block) current_block = {} current_block_size = 0 current_block[item] = weights[item] current_block_size += weight_size total_size += weight_size # Add the last block sharded_state_dicts.append(current_block) # If we only have one shard, we return it if len(sharded_state_dicts) == 1: return {FLAX_WEIGHTS_NAME: sharded_state_dicts[0]}, None # Otherwise, let's build the index weight_map = {} shards = {} for idx, shard in enumerate(sharded_state_dicts): shard_file = FLAX_WEIGHTS_NAME.replace(".msgpack", f"-{idx+1:05d}-of-{len(sharded_state_dicts):05d}.msgpack") shards[shard_file] = shard for weight_name in shard.keys(): weight_map[weight_name] = shard_file # Add the metadata metadata = {"total_size": total_size} index = {"metadata": metadata, "weight_map": weight_map} return shards, index class FlaxPreTrainedModel(PushToHubMixin, FlaxGenerationMixin): r""" Base class for all models. [`FlaxPreTrainedModel`] takes care of storing the configuration of the models and handles methods for loading, downloading and saving models. Class attributes (overridden by derived classes): - **config_class** ([`PretrainedConfig`]) -- A subclass of [`PretrainedConfig`] to use as configuration class for this model architecture. - **base_model_prefix** (`str`) -- A string indicating the attribute associated to the base model in derived classes of the same architecture adding modules on top of the base model. - **main_input_name** (`str`) -- The name of the principal input to the model (often `input_ids` for NLP models, `pixel_values` for vision models and `input_values` for speech models). """ config_class = None base_model_prefix = "" main_input_name = "input_ids" _auto_class = None _missing_keys = set() def __init__( self, config: PretrainedConfig, module: nn.Module, input_shape: Tuple = (1, 1), seed: int = 0, dtype: jnp.dtype = jnp.float32, _do_init: bool = True, ): if config is None: raise ValueError("config cannot be None") if module is None: raise ValueError("module cannot be None") # Those are private to be exposed as typed property on derived classes. self._config = config self._module = module # Those are public as their type is generic to every derived classes. self.key = PRNGKey(seed) self.dtype = dtype self.input_shape = input_shape self.generation_config = GenerationConfig.from_model_config(config) if self.can_generate() else None # To check if the model was initialized automatically. self._is_initialized = _do_init if _do_init: # randomly initialized parameters random_params = self.init_weights(self.key, input_shape) params_shape_tree = jax.eval_shape(lambda params: params, random_params) else: init_fn = partial(self.init_weights, input_shape=input_shape) params_shape_tree = jax.eval_shape(init_fn, self.key) logger.info( "Model weights are not initialized as `_do_init` is set to `False`. " f"Make sure to call `{self.__class__.__name__}.init_weights` manually to initialize the weights." ) # get the shape of the parameters self._params_shape_tree = params_shape_tree # save required_params as set self._required_params = set(flatten_dict(unfreeze(params_shape_tree)).keys()) # initialize the parameters if _do_init: self.params = random_params def init_weights(self, rng: jax.random.PRNGKey, input_shape: Tuple, params: FrozenDict = None) -> Dict: raise NotImplementedError(f"init method has to be implemented for {self}") def enable_gradient_checkpointing(self): raise NotImplementedError(f"gradient checkpointing method has to be implemented for {self}") @classmethod def _from_config(cls, config, **kwargs): """ All context managers that the model should be initialized under go here. """ return cls(config, **kwargs) @property def framework(self) -> str: """ :str: Identifies that this is a Flax model. """ return "flax" @property def config(self) -> PretrainedConfig: return self._config @property def module(self) -> nn.Module: return self._module @property def params(self) -> Union[Dict, FrozenDict]: if not self._is_initialized: raise ValueError( "`params` cannot be accessed from model when the model is created with `_do_init=False`. " "You must call `init_weights` manually and store the params outside of the model and " "pass it explicitly where needed." ) return self._params @property def required_params(self) -> Set: return self._required_params @property def params_shape_tree(self) -> Dict: return self._params_shape_tree @params.setter def params(self, params: Union[Dict, FrozenDict]): # don't set params if the model is not initialized if not self._is_initialized: raise ValueError( "`params` cannot be set from model when the model is created with `_do_init=False`. " "You store the params outside of the model." ) if isinstance(params, FrozenDict): params = unfreeze(params) param_keys = set(flatten_dict(params).keys()) if len(self.required_params - param_keys) > 0: raise ValueError( "Some parameters are missing. Make sure that `params` include the following " f"parameters {self.required_params - param_keys}" ) self._params = params def _cast_floating_to(self, params: Union[Dict, FrozenDict], dtype: jnp.dtype, mask: Any = None) -> Any: """ Helper method to cast floating-point values of given parameter `PyTree` to given `dtype`. """ # taken from https://github.com/deepmind/jmp/blob/3a8318abc3292be38582794dbf7b094e6583b192/jmp/_src/policy.py#L27 def conditional_cast(param): if isinstance(param, jnp.ndarray) and jnp.issubdtype(param.dtype, jnp.floating): param = param.astype(dtype) return param if mask is None: return jax.tree_util.tree_map(conditional_cast, params) flat_params = flatten_dict(params) flat_mask, _ = jax.tree_util.tree_flatten(mask) for masked, key in zip(flat_mask, sorted(flat_params.keys())): if masked: flat_params[key] = conditional_cast(flat_params[key]) return unflatten_dict(flat_params) def to_bf16(self, params: Union[Dict, FrozenDict], mask: Any = None): r""" Cast the floating-point `params` to `jax.numpy.bfloat16`. This returns a new `params` tree and does not cast the `params` in place. This method can be used on TPU to explicitly convert the model parameters to bfloat16 precision to do full half-precision training or to save weights in bfloat16 for inference in order to save memory and improve speed. Arguments: params (`Union[Dict, FrozenDict]`): A `PyTree` of model parameters. mask (`Union[Dict, FrozenDict]`): A `PyTree` with same structure as the `params` tree. The leaves should be booleans, `True` for params you want to cast, and should be `False` for those you want to skip. Examples: ```python >>> from transformers import FlaxBertModel >>> # load model >>> model = FlaxBertModel.from_pretrained("google-bert/bert-base-cased") >>> # By default, the model parameters will be in fp32 precision, to cast these to bfloat16 precision >>> model.params = model.to_bf16(model.params) >>> # If you want don't want to cast certain parameters (for example layer norm bias and scale) >>> # then pass the mask as follows >>> from flax import traverse_util >>> model = FlaxBertModel.from_pretrained("google-bert/bert-base-cased") >>> flat_params = traverse_util.flatten_dict(model.params) >>> mask = { ... path: (path[-2] != ("LayerNorm", "bias") and path[-2:] != ("LayerNorm", "scale")) ... for path in flat_params ... } >>> mask = traverse_util.unflatten_dict(mask) >>> model.params = model.to_bf16(model.params, mask) ```""" return self._cast_floating_to(params, jnp.bfloat16, mask) def to_fp32(self, params: Union[Dict, FrozenDict], mask: Any = None): r""" Cast the floating-point `parmas` to `jax.numpy.float32`. This method can be used to explicitly convert the model parameters to fp32 precision. This returns a new `params` tree and does not cast the `params` in place. Arguments: params (`Union[Dict, FrozenDict]`): A `PyTree` of model parameters. mask (`Union[Dict, FrozenDict]`): A `PyTree` with same structure as the `params` tree. The leaves should be booleans, `True` for params you want to cast, and should be `False` for those you want to skip Examples: ```python >>> from transformers import FlaxBertModel >>> # Download model and configuration from huggingface.co >>> model = FlaxBertModel.from_pretrained("google-bert/bert-base-cased") >>> # By default, the model params will be in fp32, to illustrate the use of this method, >>> # we'll first cast to fp16 and back to fp32 >>> model.params = model.to_f16(model.params) >>> # now cast back to fp32 >>> model.params = model.to_fp32(model.params) ```""" return self._cast_floating_to(params, jnp.float32, mask) def to_fp16(self, params: Union[Dict, FrozenDict], mask: Any = None): r""" Cast the floating-point `parmas` to `jax.numpy.float16`. This returns a new `params` tree and does not cast the `params` in place. This method can be used on GPU to explicitly convert the model parameters to float16 precision to do full half-precision training or to save weights in float16 for inference in order to save memory and improve speed. Arguments: params (`Union[Dict, FrozenDict]`): A `PyTree` of model parameters. mask (`Union[Dict, FrozenDict]`): A `PyTree` with same structure as the `params` tree. The leaves should be booleans, `True` for params you want to cast, and should be `False` for those you want to skip Examples: ```python >>> from transformers import FlaxBertModel >>> # load model >>> model = FlaxBertModel.from_pretrained("google-bert/bert-base-cased") >>> # By default, the model params will be in fp32, to cast these to float16 >>> model.params = model.to_fp16(model.params) >>> # If you want don't want to cast certain parameters (for example layer norm bias and scale) >>> # then pass the mask as follows >>> from flax import traverse_util >>> model = FlaxBertModel.from_pretrained("google-bert/bert-base-cased") >>> flat_params = traverse_util.flatten_dict(model.params) >>> mask = { ... path: (path[-2] != ("LayerNorm", "bias") and path[-2:] != ("LayerNorm", "scale")) ... for path in flat_params ... } >>> mask = traverse_util.unflatten_dict(mask) >>> model.params = model.to_fp16(model.params, mask) ```""" return self._cast_floating_to(params, jnp.float16, mask) @classmethod def load_flax_weights(cls, resolved_archive_file): try: if resolved_archive_file.endswith(".safetensors"): state = safe_load_file(resolved_archive_file) state = unflatten_dict(state, sep=".") else: with open(resolved_archive_file, "rb") as state_f: state = from_bytes(cls, state_f.read()) except (UnpicklingError, msgpack.exceptions.ExtraData) as e: try: with open(resolved_archive_file) as f: if f.read().startswith("version"): raise OSError( "You seem to have cloned a repository without having git-lfs installed. Please" " install git-lfs and run `git lfs install` followed by `git lfs pull` in the" " folder you cloned." ) else: raise ValueError from e except (UnicodeDecodeError, ValueError): raise EnvironmentError(f"Unable to convert {resolved_archive_file} to Flax deserializable object. ") return state @classmethod def load_flax_sharded_weights(cls, shard_files): """ This is the same as [`flax.serialization.from_bytes`] (https:lax.readthedocs.io/en/latest/_modules/flax/serialization.html#from_bytes) but for a sharded checkpoint. This load is performed efficiently: each checkpoint shard is loaded one by one in RAM and deleted after being loaded in the model. Args: shard_files (`List[str]`: The list of shard files to load. Returns: `Dict`: A nested dictionary of the model parameters, in the expected format for flax models : `{'model': {'params': {'...'}}}`. """ # Load the index state_sharded_dict = {} for shard_file in shard_files: # load using msgpack utils try: with open(shard_file, "rb") as state_f: state = from_bytes(cls, state_f.read()) except (UnpicklingError, msgpack.exceptions.ExtraData) as e: with open(shard_file) as f: if f.read().startswith("version"): raise OSError( "You seem to have cloned a repository without having git-lfs installed. Please" " install git-lfs and run `git lfs install` followed by `git lfs pull` in the" " folder you cloned." ) else: raise ValueError from e except (UnicodeDecodeError, ValueError): raise EnvironmentError(f"Unable to convert {shard_file} to Flax deserializable object. ") state = flatten_dict(state, sep="/") state_sharded_dict.update(state) del state gc.collect() # the state dict is unflattened to the match the format of model.params return unflatten_dict(state_sharded_dict, sep="/") @classmethod def can_generate(cls) -> bool: """ Returns whether this model can generate sequences with `.generate()`. Returns: `bool`: Whether this model can generate sequences with `.generate()`. """ # Detects whether `prepare_inputs_for_generation` has been overwritten, which is a requirement for generation. # Alternativelly, the model can also have a custom `generate` function. if "GenerationMixin" in str(cls.prepare_inputs_for_generation) and "GenerationMixin" in str(cls.generate): return False return True @classmethod def from_pretrained( cls, pretrained_model_name_or_path: Union[str, os.PathLike], dtype: jnp.dtype = jnp.float32, *model_args, config: Optional[Union[PretrainedConfig, str, os.PathLike]] = None, cache_dir: Optional[Union[str, os.PathLike]] = None, ignore_mismatched_sizes: bool = False, force_download: bool = False, local_files_only: bool = False, token: Optional[Union[str, bool]] = None, revision: str = "main", **kwargs, ): r""" Instantiate a pretrained flax model from a pre-trained model configuration. The warning *Weights from XXX not initialized from pretrained model* means that the weights of XXX do not come pretrained with the rest of the model. It is up to you to train those weights with a downstream fine-tuning task. The warning *Weights from XXX not used in YYY* means that the layer XXX is not used by YYY, therefore those weights are discarded. Parameters: pretrained_model_name_or_path (`str` or `os.PathLike`): Can be either: - A string, the *model id* of a pretrained model hosted inside a model repo on huggingface.co. - A path to a *directory* containing model weights saved using [`~FlaxPreTrainedModel.save_pretrained`], e.g., `./my_model_directory/`. - A path or url to a *pt index checkpoint file* (e.g, `./tf_model/model.ckpt.index`). In this case, `from_pt` should be set to `True`. dtype (`jax.numpy.dtype`, *optional*, defaults to `jax.numpy.float32`): The data type of the computation. Can be one of `jax.numpy.float32`, `jax.numpy.float16` (on GPUs) and `jax.numpy.bfloat16` (on TPUs). This can be used to enable mixed-precision training or half-precision inference on GPUs or TPUs. If specified all the computation will be performed with the given `dtype`. **Note that this only specifies the dtype of the computation and does not influence the dtype of model parameters.** If you wish to change the dtype of the model parameters, see [`~FlaxPreTrainedModel.to_fp16`] and [`~FlaxPreTrainedModel.to_bf16`]. model_args (sequence of positional arguments, *optional*): All remaining positional arguments will be passed to the underlying model's `__init__` method. config (`Union[PretrainedConfig, str, os.PathLike]`, *optional*): Can be either: - an instance of a class derived from [`PretrainedConfig`], - a string or path valid as input to [`~PretrainedConfig.from_pretrained`]. Configuration for the model to use instead of an automatically loaded configuration. Configuration can be automatically loaded when: - The model is a model provided by the library (loaded with the *model id* string of a pretrained model). - The model was saved using [`~PreTrainedModel.save_pretrained`] and is reloaded by supplying the save directory. - The model is loaded by supplying a local directory as `pretrained_model_name_or_path` and a configuration JSON file named *config.json* is found in the directory. cache_dir (`Union[str, os.PathLike]`, *optional*): Path to a directory in which a downloaded pretrained model configuration should be cached if the standard cache should not be used. from_pt (`bool`, *optional*, defaults to `False`): Load the model weights from a PyTorch checkpoint save file (see docstring of `pretrained_model_name_or_path` argument). ignore_mismatched_sizes (`bool`, *optional*, defaults to `False`): Whether or not to raise an error if some of the weights from the checkpoint do not have the same size as the weights of the model (if for instance, you are instantiating a model with 10 labels from a checkpoint with 3 labels). force_download (`bool`, *optional*, defaults to `False`): Whether or not to force the (re-)download of the model weights and configuration files, overriding the cached versions if they exist. resume_download (`bool`, *optional*, defaults to `False`): Whether or not to delete incompletely received files. Will attempt to resume the download if such a file exists. proxies (`Dict[str, str]`, *optional*): A dictionary of proxy servers to use by protocol or endpoint, e.g., `{'http': 'foo.bar:3128', 'http://hostname': 'foo.bar:4012'}`. The proxies are used on each request. local_files_only(`bool`, *optional*, defaults to `False`): Whether or not to only look at local files (i.e., do not try to download the model). token (`str` or `bool`, *optional*): The token to use as HTTP bearer authorization for remote files. If `True`, or not specified, will use the token generated when running `huggingface-cli login` (stored in `~/.huggingface`). revision (`str`, *optional*, defaults to `"main"`): The specific model version to use. It can be a branch name, a tag name, or a commit id, since we use a git-based system for storing models and other artifacts on huggingface.co, so `revision` can be any identifier allowed by git. <Tip> To test a pull request you made on the Hub, you can pass `revision="refs/pr/<pr_number>". </Tip> subfolder (`str`, *optional*, defaults to `""`): In case the relevant files are located inside a subfolder of the model repo on huggingface.co, you can specify the folder name here. kwargs (remaining dictionary of keyword arguments, *optional*): Can be used to update the configuration object (after it being loaded) and initiate the model (e.g., `output_attentions=True`). Behaves differently depending on whether a `config` is provided or automatically loaded: - If a configuration is provided with `config`, `**kwargs` will be directly passed to the underlying model's `__init__` method (we assume all relevant updates to the configuration have already been done) - If a configuration is not provided, `kwargs` will be first passed to the configuration class initialization function ([`~PretrainedConfig.from_pretrained`]). Each key of `kwargs` that corresponds to a configuration attribute will be used to override said attribute with the supplied `kwargs` value. Remaining keys that do not correspond to any configuration attribute will be passed to the underlying model's `__init__` function. Examples: ```python >>> from transformers import BertConfig, FlaxBertModel >>> # Download model and configuration from huggingface.co and cache. >>> model = FlaxBertModel.from_pretrained("google-bert/bert-base-cased") >>> # Model was saved using *save_pretrained('./test/saved_model/')* (for example purposes, not runnable). >>> model = FlaxBertModel.from_pretrained("./test/saved_model/") >>> # Loading from a PyTorch checkpoint file instead of a PyTorch model (slower, for example purposes, not runnable). >>> config = BertConfig.from_json_file("./pt_model/config.json") >>> model = FlaxBertModel.from_pretrained("./pt_model/pytorch_model.bin", from_pt=True, config=config) ```""" from_pt = kwargs.pop("from_pt", False) resume_download = kwargs.pop("resume_download", False) proxies = kwargs.pop("proxies", None) use_auth_token = kwargs.pop("use_auth_token", None) trust_remote_code = kwargs.pop("trust_remote_code", None) from_pipeline = kwargs.pop("_from_pipeline", None) from_auto_class = kwargs.pop("_from_auto", False) _do_init = kwargs.pop("_do_init", True) subfolder = kwargs.pop("subfolder", "") commit_hash = kwargs.pop("_commit_hash", None) # Not relevant for Flax Models _ = kwargs.pop("adapter_kwargs", None) if use_auth_token is not None: warnings.warn( "The `use_auth_token` argument is deprecated and will be removed in v5 of Transformers. Please use `token` instead.", FutureWarning, ) if token is not None: raise ValueError( "`token` and `use_auth_token` are both specified. Please set only the argument `token`." ) token = use_auth_token if trust_remote_code is True: logger.warning( "The argument `trust_remote_code` is to be used with Auto classes. It has no effect here and is" " ignored." ) user_agent = {"file_type": "model", "framework": "flax", "from_auto_class": from_auto_class} if from_pipeline is not None: user_agent["using_pipeline"] = from_pipeline if is_offline_mode() and not local_files_only: logger.info("Offline mode: forcing local_files_only=True") local_files_only = True # Load config if we don't provide a configuration if not isinstance(config, PretrainedConfig): config_path = config if config is not None else pretrained_model_name_or_path config, model_kwargs = cls.config_class.from_pretrained( config_path, cache_dir=cache_dir, return_unused_kwargs=True, force_download=force_download, resume_download=resume_download, proxies=proxies, local_files_only=local_files_only, token=token, revision=revision, subfolder=subfolder, _from_auto=from_auto_class, _from_pipeline=from_pipeline, _commit_hash=commit_hash, **kwargs, ) else: model_kwargs = kwargs.copy() if commit_hash is None: commit_hash = getattr(config, "_commit_hash", None) # Add the dtype to model_kwargs model_kwargs["dtype"] = dtype # This variable will flag if we're loading a sharded checkpoint. In this case the archive file is just the # index of the files. is_sharded = False # Load model if pretrained_model_name_or_path is not None: pretrained_model_name_or_path = str(pretrained_model_name_or_path) is_local = os.path.isdir(pretrained_model_name_or_path) if os.path.isdir(pretrained_model_name_or_path): if os.path.isfile(os.path.join(pretrained_model_name_or_path, subfolder, FLAX_WEIGHTS_NAME)): # Load from a Flax checkpoint archive_file = os.path.join(pretrained_model_name_or_path, subfolder, FLAX_WEIGHTS_NAME) elif os.path.isfile(os.path.join(pretrained_model_name_or_path, subfolder, FLAX_WEIGHTS_INDEX_NAME)): # Load from a sharded Flax checkpoint archive_file = os.path.join(pretrained_model_name_or_path, subfolder, FLAX_WEIGHTS_INDEX_NAME) is_sharded = True elif is_safetensors_available() and os.path.isfile( os.path.join(pretrained_model_name_or_path, SAFE_WEIGHTS_NAME) ): # Load from a safetensors checkpoint archive_file = os.path.join(pretrained_model_name_or_path, SAFE_WEIGHTS_NAME) elif from_pt and os.path.isfile(os.path.join(pretrained_model_name_or_path, subfolder, WEIGHTS_NAME)): # Load from a PyTorch checkpoint archive_file = os.path.join(pretrained_model_name_or_path, subfolder, WEIGHTS_NAME) elif from_pt and os.path.isfile( os.path.join(pretrained_model_name_or_path, subfolder, WEIGHTS_INDEX_NAME) ): # Load from a sharded pytorch checkpoint archive_file = os.path.join(pretrained_model_name_or_path, subfolder, WEIGHTS_INDEX_NAME) is_sharded = True # At this stage we don't have a weight file so we will raise an error. elif is_safetensors_available() and os.path.isfile( os.path.join(pretrained_model_name_or_path, SAFE_WEIGHTS_INDEX_NAME) ): # Load from a sharded safetensors checkpoint archive_file = os.path.join(pretrained_model_name_or_path, SAFE_WEIGHTS_INDEX_NAME) is_sharded = True raise NotImplementedError("Support for sharded checkpoints using safetensors is coming soon!") elif os.path.isfile(os.path.join(pretrained_model_name_or_path, subfolder, WEIGHTS_NAME)): raise EnvironmentError( f"Error no file named {FLAX_WEIGHTS_NAME} found in directory {pretrained_model_name_or_path} " "but there is a file for PyTorch weights. Use `from_pt=True` to load this model from those " "weights." ) else: raise EnvironmentError( f"Error no file named {FLAX_WEIGHTS_NAME} or {WEIGHTS_NAME} found in directory " f"{pretrained_model_name_or_path}." ) elif os.path.isfile(os.path.join(subfolder, pretrained_model_name_or_path)): archive_file = pretrained_model_name_or_path is_local = True elif is_remote_url(pretrained_model_name_or_path): filename = pretrained_model_name_or_path resolved_archive_file = download_url(pretrained_model_name_or_path) else: if from_pt: filename = WEIGHTS_NAME else: filename = FLAX_WEIGHTS_NAME try: # Load from URL or cache if already cached cached_file_kwargs = { "cache_dir": cache_dir, "force_download": force_download, "proxies": proxies, "resume_download": resume_download, "local_files_only": local_files_only, "token": token, "user_agent": user_agent, "revision": revision, "subfolder": subfolder, "_raise_exceptions_for_gated_repo": False, "_raise_exceptions_for_missing_entries": False, "_commit_hash": commit_hash, } resolved_archive_file = cached_file(pretrained_model_name_or_path, filename, **cached_file_kwargs) # Maybe the checkpoint is sharded, we try to grab the index name in this case. if resolved_archive_file is None and filename == FLAX_WEIGHTS_NAME: resolved_archive_file = cached_file( pretrained_model_name_or_path, FLAX_WEIGHTS_INDEX_NAME, **cached_file_kwargs ) if resolved_archive_file is not None: is_sharded = True # Maybe the checkpoint is pytorch sharded, we try to grab the pytorch index name in this case. if resolved_archive_file is None and from_pt: resolved_archive_file = cached_file( pretrained_model_name_or_path, WEIGHTS_INDEX_NAME, **cached_file_kwargs ) if resolved_archive_file is not None: is_sharded = True # If we still haven't found anything, look for `safetensors`. if resolved_archive_file is None: # No support for sharded safetensors yet, so we'll raise an error if that's all we find. filename = SAFE_WEIGHTS_NAME resolved_archive_file = cached_file( pretrained_model_name_or_path, SAFE_WEIGHTS_NAME, **cached_file_kwargs ) # Since we set _raise_exceptions_for_missing_entries=False, we don't get an exception but a None # result when internet is up, the repo and revision exist, but the file does not. if resolved_archive_file is None: # Otherwise, maybe there is a TF or Torch model file. We try those to give a helpful error # message. has_file_kwargs = { "revision": revision, "proxies": proxies, "token": token, } if has_file(pretrained_model_name_or_path, SAFE_WEIGHTS_INDEX_NAME, **has_file_kwargs): is_sharded = True raise NotImplementedError( "Support for sharded checkpoints using safetensors is coming soon!" ) elif has_file(pretrained_model_name_or_path, WEIGHTS_NAME, **has_file_kwargs): raise EnvironmentError( f"{pretrained_model_name_or_path} does not appear to have a file named" f" {FLAX_WEIGHTS_NAME} but there is a file for PyTorch weights. Use `from_pt=True` to" " load this model from those weights." ) elif has_file(pretrained_model_name_or_path, WEIGHTS_INDEX_NAME, **has_file_kwargs): raise EnvironmentError( f"{pretrained_model_name_or_path} does not appear to have a file named" f" {FLAX_WEIGHTS_INDEX_NAME} but there is a sharded file for PyTorch weights. Use" " `from_pt=True` to load this model from those weights." ) else: raise EnvironmentError( f"{pretrained_model_name_or_path} does not appear to have a file named" f" {FLAX_WEIGHTS_NAME} or {WEIGHTS_NAME}." ) except EnvironmentError: # Raise any environment error raise by `cached_file`. It will have a helpful error message adapted # to the original exception. raise except Exception: # For any other exception, we throw a generic error. raise EnvironmentError( f"Can't load the model for '{pretrained_model_name_or_path}'. If you were trying to load it" " from 'https://huggingface.co/models', make sure you don't have a local directory with the" f" same name. Otherwise, make sure '{pretrained_model_name_or_path}' is the correct path to a" f" directory containing a file named {FLAX_WEIGHTS_NAME} or {WEIGHTS_NAME}." ) if is_local: logger.info(f"loading weights file {archive_file}") resolved_archive_file = archive_file filename = resolved_archive_file.split(os.path.sep)[-1] else: logger.info(f"loading weights file {filename} from cache at {resolved_archive_file}") else: resolved_archive_file = None # We'll need to download and cache each checkpoint shard if the checkpoint is sharded. if is_sharded: # resolved_archive_file becomes a list of files that point to the different checkpoint shards in this case. resolved_archive_file, _ = get_checkpoint_shard_files( pretrained_model_name_or_path, resolved_archive_file, cache_dir=cache_dir, force_download=force_download, proxies=proxies, resume_download=resume_download, local_files_only=local_files_only, token=token, user_agent=user_agent, revision=revision, subfolder=subfolder, _commit_hash=commit_hash, ) safetensors_from_pt = False if filename == SAFE_WEIGHTS_NAME: with safe_open(resolved_archive_file, framework="flax") as f: safetensors_metadata = f.metadata() if safetensors_metadata is None or safetensors_metadata.get("format") not in ["pt", "tf", "flax"]: raise OSError( f"The safetensors archive passed at {resolved_archive_file} does not contain the valid metadata." " Make sure you save your model with the `save_pretrained` method." ) safetensors_from_pt = safetensors_metadata.get("format") == "pt" # init random models model = cls(config, *model_args, _do_init=_do_init, **model_kwargs) if from_pt or safetensors_from_pt: state = load_pytorch_checkpoint_in_flax_state_dict(model, resolved_archive_file, is_sharded) else: if is_sharded: state = cls.load_flax_sharded_weights(resolved_archive_file) else: state = cls.load_flax_weights(resolved_archive_file) # make sure all arrays are stored as jnp.arrays # NOTE: This is to prevent a bug this will be fixed in Flax >= v0.3.4: # https://github.com/google/flax/issues/1261 if _do_init: state = jax.tree_util.tree_map(jnp.array, state) else: # keep the params on CPU if we don't want to initialize state = jax.tree_util.tree_map(lambda x: jax.device_put(x, jax.local_devices(backend="cpu")[0]), state) if "batch_stats" in state: # if flax model contains batch norm layers # if model is base model only use model_prefix key if ( cls.base_model_prefix not in dict(model.params_shape_tree["params"]) and cls.base_model_prefix in state["params"] ): state["params"] = state["params"][cls.base_model_prefix] state["batch_stats"] = state["batch_stats"][cls.base_model_prefix] # if model is head model and we are loading weights from base model # we initialize new params dict with base_model_prefix if ( cls.base_model_prefix in dict(model.params_shape_tree["params"]) and cls.base_model_prefix not in state["params"] ): state = { "params": {cls.base_model_prefix: state["params"]}, "batch_stats": {cls.base_model_prefix: state["batch_stats"]}, } else: # if model is base model only use model_prefix key if cls.base_model_prefix not in dict(model.params_shape_tree) and cls.base_model_prefix in state: state = state[cls.base_model_prefix] # if model is head model and we are loading weights from base model # we initialize new params dict with base_model_prefix if cls.base_model_prefix in dict(model.params_shape_tree) and cls.base_model_prefix not in state: state = {cls.base_model_prefix: state} # flatten dicts state = flatten_dict(state) random_state = flatten_dict(unfreeze(model.params if _do_init else model.params_shape_tree)) missing_keys = model.required_params - set(state.keys()) unexpected_keys = set(state.keys()) - model.required_params # Disabling warning when porting pytorch weights to flax, flax does not uses num_batches_tracked for unexpected_key in unexpected_keys.copy(): if "num_batches_tracked" in unexpected_key[-1]: unexpected_keys.remove(unexpected_key) if missing_keys and not _do_init: logger.warning( f"The checkpoint {pretrained_model_name_or_path} is missing required keys: {missing_keys}. " "Make sure to call model.init_weights to initialize the missing weights." ) cls._missing_keys = missing_keys # Mistmatched keys contains tuples key/shape1/shape2 of weights in the checkpoint that have a shape not # matching the weights in the model. mismatched_keys = [] for key in state.keys(): if key in random_state and state[key].shape != random_state[key].shape: if ignore_mismatched_sizes: mismatched_keys.append((key, state[key].shape, random_state[key].shape)) state[key] = random_state[key] else: raise ValueError( f"Trying to load the pretrained weight for {key} failed: checkpoint has shape " f"{state[key].shape} which is incompatible with the model shape {random_state[key].shape}. " "Using `ignore_mismatched_sizes=True` if you really want to load this checkpoint inside this " "model." ) # add missing keys as random parameters if we are initializing if missing_keys and _do_init: for missing_key in missing_keys: state[missing_key] = random_state[missing_key] # remove unexpected keys to not be saved again for unexpected_key in unexpected_keys: del state[unexpected_key] if len(unexpected_keys) > 0: logger.warning( f"Some weights of the model checkpoint at {pretrained_model_name_or_path} were not used when" f" initializing {model.__class__.__name__}: {unexpected_keys}\n- This IS expected if you are" f" initializing {model.__class__.__name__} from the checkpoint of a model trained on another task or" " with another architecture (e.g. initializing a BertForSequenceClassification model from a" " BertForPreTraining model).\n- This IS NOT expected if you are initializing" f" {model.__class__.__name__} from the checkpoint of a model that you expect to be exactly identical" " (initializing a BertForSequenceClassification model from a BertForSequenceClassification model)." ) else: logger.info(f"All model checkpoint weights were used when initializing {model.__class__.__name__}.\n") if len(missing_keys) > 0: logger.warning( f"Some weights of {model.__class__.__name__} were not initialized from the model checkpoint at" f" {pretrained_model_name_or_path} and are newly initialized: {missing_keys}\nYou should probably" " TRAIN this model on a down-stream task to be able to use it for predictions and inference." ) elif len(mismatched_keys) == 0: logger.info( f"All the weights of {model.__class__.__name__} were initialized from the model checkpoint at" f" {pretrained_model_name_or_path}.\nIf your task is similar to the task the model of the checkpoint" f" was trained on, you can already use {model.__class__.__name__} for predictions without further" " training." ) if len(mismatched_keys) > 0: mismatched_warning = "\n".join( [ f"- {key}: found shape {shape1} in the checkpoint and {shape2} in the model instantiated" for key, shape1, shape2 in mismatched_keys ] ) logger.warning( f"Some weights of {model.__class__.__name__} were not initialized from the model checkpoint at" f" {pretrained_model_name_or_path} and are newly initialized because the shapes did not" f" match:\n{mismatched_warning}\nYou should probably TRAIN this model on a down-stream task to be able" " to use it for predictions and inference." ) # dictionary of key: dtypes for the model params param_dtypes = jax.tree_util.tree_map(lambda x: x.dtype, state) # extract keys of parameters not in jnp.float32 fp16_params = [k for k in param_dtypes if param_dtypes[k] == jnp.float16] bf16_params = [k for k in param_dtypes if param_dtypes[k] == jnp.bfloat16] # raise a warning if any of the parameters are not in jnp.float32 if len(fp16_params) > 0: logger.warning( f"Some of the weights of {model.__class__.__name__} were initialized in float16 precision from " f"the model checkpoint at {pretrained_model_name_or_path}:\n{fp16_params}\n" "You should probably UPCAST the model weights to float32 if this was not intended. " "See [`~FlaxPreTrainedModel.to_fp32`] for further information on how to do this." ) if len(bf16_params) > 0: logger.warning( f"Some of the weights of {model.__class__.__name__} were initialized in bfloat16 precision from " f"the model checkpoint at {pretrained_model_name_or_path}:\n{bf16_params}\n" "You should probably UPCAST the model weights to float32 if this was not intended. " "See [`~FlaxPreTrainedModel.to_fp32`] for further information on how to do this." ) # If it is a model with generation capabilities, attempt to load the generation config if model.can_generate(): try: model.generation_config = GenerationConfig.from_pretrained( pretrained_model_name_or_path, cache_dir=cache_dir, force_download=force_download, resume_download=resume_download, proxies=proxies, local_files_only=local_files_only, token=token, revision=revision, subfolder=subfolder, _from_auto=from_auto_class, _from_pipeline=from_pipeline, **kwargs, ) except OSError: logger.info( "Generation config file not found, using a generation config created from the model config." ) pass if _do_init: # set correct parameters model.params = unflatten_dict(state) return model else: return model, unflatten_dict(state) def save_pretrained( self, save_directory: Union[str, os.PathLike], params=None, push_to_hub=False, max_shard_size="10GB", token: Optional[Union[str, bool]] = None, safe_serialization: bool = False, **kwargs, ): """ Save a model and its configuration file to a directory, so that it can be re-loaded using the `[`~FlaxPreTrainedModel.from_pretrained`]` class method Arguments: save_directory (`str` or `os.PathLike`): Directory to which to save. Will be created if it doesn't exist. push_to_hub (`bool`, *optional*, defaults to `False`): Whether or not to push your model to the Hugging Face model hub after saving it. You can specify the repository you want to push to with `repo_id` (will default to the name of `save_directory` in your namespace). max_shard_size (`int` or `str`, *optional*, defaults to `"10GB"`): The maximum size for a checkpoint before being sharded. Checkpoints shard will then be each of size lower than this size. If expressed as a string, needs to be digits followed by a unit (like `"5MB"`). <Tip warning={true}> If a single weight of the model is bigger than `max_shard_size`, it will be in its own checkpoint shard which will be bigger than `max_shard_size`. </Tip> token (`str` or `bool`, *optional*): The token to use as HTTP bearer authorization for remote files. If `True`, or not specified, will use the token generated when running `huggingface-cli login` (stored in `~/.huggingface`). kwargs (`Dict[str, Any]`, *optional*): Additional key word arguments passed along to the [`~utils.PushToHubMixin.push_to_hub`] method. safe_serialization (`bool`, *optional*, defaults to `False`): Whether to save the model using `safetensors` or through msgpack. """ use_auth_token = kwargs.pop("use_auth_token", None) if use_auth_token is not None: warnings.warn( "The `use_auth_token` argument is deprecated and will be removed in v5 of Transformers. Please use `token` instead.", FutureWarning, ) if token is not None: raise ValueError( "`token` and `use_auth_token` are both specified. Please set only the argument `token`." ) token = use_auth_token if token is not None: kwargs["token"] = token if os.path.isfile(save_directory): logger.error(f"Provided path ({save_directory}) should be a directory, not a file") return os.makedirs(save_directory, exist_ok=True) if push_to_hub: commit_message = kwargs.pop("commit_message", None) repo_id = kwargs.pop("repo_id", save_directory.split(os.path.sep)[-1]) repo_id = self._create_repo(repo_id, **kwargs) files_timestamps = self._get_files_timestamps(save_directory) # get abs dir save_directory = os.path.abspath(save_directory) # save config as well self.config.architectures = [self.__class__.__name__[4:]] # If we have a custom model, we copy the file defining it in the folder and set the attributes so it can be # loaded from the Hub. if self._auto_class is not None: custom_object_save(self, save_directory, config=self.config) self.config.save_pretrained(save_directory) if self.can_generate(): self.generation_config.save_pretrained(save_directory) # save model weights_name = SAFE_WEIGHTS_NAME if safe_serialization else FLAX_WEIGHTS_NAME output_model_file = os.path.join(save_directory, weights_name) shards, index = flax_shard_checkpoint(params if params is not None else self.params, max_shard_size) # Clean the folder from a previous save for filename in os.listdir(save_directory): full_filename = os.path.join(save_directory, filename) weights_no_suffix = weights_name.replace(".bin", "").replace(".safetensors", "") if ( filename.startswith(weights_no_suffix) and os.path.isfile(full_filename) and filename not in shards.keys() ): os.remove(full_filename) if index is None: if safe_serialization: params = params if params is not None else self.params flat_dict = flatten_dict(params, sep=".") safe_save_file(flat_dict, output_model_file, metadata={"format": "flax"}) else: with open(output_model_file, "wb") as f: params = params if params is not None else self.params model_bytes = to_bytes(params) f.write(model_bytes) else: save_index_file = os.path.join(save_directory, FLAX_WEIGHTS_INDEX_NAME) # Save the index as well with open(save_index_file, "w", encoding="utf-8") as f: content = json.dumps(index, indent=2, sort_keys=True) + "\n" f.write(content) logger.info( f"The model is bigger than the maximum size per checkpoint ({max_shard_size}) and is going to be " f"split in {len(shards)} checkpoint shards. You can find where each parameters has been saved in the " f"index located at {save_index_file}." ) for shard_file, shard in shards.items(): # the shard item are unflattened, to save them we need to flatten them again with open(os.path.join(save_directory, shard_file), mode="wb") as f: params = unflatten_dict(shard, sep="/") shard_bytes = to_bytes(params) f.write(shard_bytes) logger.info(f"Model weights saved in {output_model_file}") if push_to_hub: self._upload_modified_files( save_directory, repo_id, files_timestamps, commit_message=commit_message, token=token, ) @classmethod def register_for_auto_class(cls, auto_class="FlaxAutoModel"): """ Register this class with a given auto class. This should only be used for custom models as the ones in the library are already mapped with an auto class. <Tip warning={true}> This API is experimental and may have some slight breaking changes in the next releases. </Tip> Args: auto_class (`str` or `type`, *optional*, defaults to `"FlaxAutoModel"`): The auto class to register this new model with. """ if not isinstance(auto_class, str): auto_class = auto_class.__name__ import transformers.models.auto as auto_module if not hasattr(auto_module, auto_class): raise ValueError(f"{auto_class} is not a valid auto class.") cls._auto_class = auto_class # To update the docstring, we need to copy the method, otherwise we change the original docstring. FlaxPreTrainedModel.push_to_hub = copy_func(FlaxPreTrainedModel.push_to_hub) if FlaxPreTrainedModel.push_to_hub.__doc__ is not None: FlaxPreTrainedModel.push_to_hub.__doc__ = FlaxPreTrainedModel.push_to_hub.__doc__.format( object="model", object_class="FlaxAutoModel", object_files="model checkpoint" ) def overwrite_call_docstring(model_class, docstring): # copy __call__ function to be sure docstring is changed only for this function model_class.__call__ = copy_func(model_class.__call__) # delete existing docstring model_class.__call__.__doc__ = None # set correct docstring model_class.__call__ = add_start_docstrings_to_model_forward(docstring)(model_class.__call__) def append_call_sample_docstring( model_class, checkpoint, output_type, config_class, mask=None, revision=None, real_checkpoint=None ): model_class.__call__ = copy_func(model_class.__call__) model_class.__call__ = add_code_sample_docstrings( checkpoint=checkpoint, output_type=output_type, config_class=config_class, model_cls=model_class.__name__, revision=revision, real_checkpoint=real_checkpoint, )(model_class.__call__) def append_replace_return_docstrings(model_class, output_type, config_class): model_class.__call__ = copy_func(model_class.__call__) model_class.__call__ = replace_return_docstrings( output_type=output_type, config_class=config_class, )(model_class.__call__)

transformers/src/transformers/modeling_flax_utils.py/0

{ "file_path": "transformers/src/transformers/modeling_flax_utils.py", "repo_id": "transformers", "token_count": 27355 }

71

# coding=utf-8 # Copyright 2023 The HuggingFace Inc. team. All rights reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. """ ALIGN model configuration""" import os from typing import TYPE_CHECKING, List, Union if TYPE_CHECKING: pass from ...configuration_utils import PretrainedConfig from ...utils import logging logger = logging.get_logger(__name__) ALIGN_PRETRAINED_CONFIG_ARCHIVE_MAP = { "kakaobrain/align-base": "https://huggingface.co/kakaobrain/align-base/resolve/main/config.json", } class AlignTextConfig(PretrainedConfig): r""" This is the configuration class to store the configuration of a [`AlignTextModel`]. It is used to instantiate a ALIGN text encoder according to the specified arguments, defining the model architecture. Instantiating a configuration with the defaults will yield a similar configuration to that of the text encoder of the ALIGN [kakaobrain/align-base](https://huggingface.co/kakaobrain/align-base) architecture. The default values here are copied from BERT. Configuration objects inherit from [`PretrainedConfig`] and can be used to control the model outputs. Read the documentation from [`PretrainedConfig`] for more information. Args: vocab_size (`int`, *optional*, defaults to 30522): Vocabulary size of the Align Text model. Defines the number of different tokens that can be represented by the `inputs_ids` passed when calling [`AlignTextModel`]. hidden_size (`int`, *optional*, defaults to 768): Dimensionality of the encoder layers and the pooler layer. num_hidden_layers (`int`, *optional*, defaults to 12): Number of hidden layers in the Transformer encoder. num_attention_heads (`int`, *optional*, defaults to 12): Number of attention heads for each attention layer in the Transformer encoder. intermediate_size (`int`, *optional*, defaults to 3072): Dimensionality of the "intermediate" (often named feed-forward) layer in the Transformer encoder. hidden_act (`str` or `Callable`, *optional*, defaults to `"gelu"`): The non-linear activation function (function or string) in the encoder and pooler. If string, `"gelu"`, `"relu"`, `"silu"` and `"gelu_new"` are supported. hidden_dropout_prob (`float`, *optional*, defaults to 0.1): The dropout probability for all fully connected layers in the embeddings, encoder, and pooler. attention_probs_dropout_prob (`float`, *optional*, defaults to 0.1): The dropout ratio for the attention probabilities. max_position_embeddings (`int`, *optional*, defaults to 512): The maximum sequence length that this model might ever be used with. Typically set this to something large just in case (e.g., 512 or 1024 or 2048). type_vocab_size (`int`, *optional*, defaults to 2): The vocabulary size of the `token_type_ids` passed when calling [`AlignTextModel`]. initializer_range (`float`, *optional*, defaults to 0.02): The standard deviation of the truncated_normal_initializer for initializing all weight matrices. layer_norm_eps (`float`, *optional*, defaults to 1e-12): The epsilon used by the layer normalization layers. pad_token_id (`int`, *optional*, defaults to 0): Padding token id. position_embedding_type (`str`, *optional*, defaults to `"absolute"`): Type of position embedding. Choose one of `"absolute"`, `"relative_key"`, `"relative_key_query"`. For positional embeddings use `"absolute"`. For more information on `"relative_key"`, please refer to [Self-Attention with Relative Position Representations (Shaw et al.)](https://arxiv.org/abs/1803.02155). For more information on `"relative_key_query"`, please refer to *Method 4* in [Improve Transformer Models with Better Relative Position Embeddings (Huang et al.)](https://arxiv.org/abs/2009.13658). use_cache (`bool`, *optional*, defaults to `True`): Whether or not the model should return the last key/values attentions (not used by all models). Only relevant if `config.is_decoder=True`. Example: ```python >>> from transformers import AlignTextConfig, AlignTextModel >>> # Initializing a AlignTextConfig with kakaobrain/align-base style configuration >>> configuration = AlignTextConfig() >>> # Initializing a AlignTextModel (with random weights) from the kakaobrain/align-base style configuration >>> model = AlignTextModel(configuration) >>> # Accessing the model configuration >>> configuration = model.config ```""" model_type = "align_text_model" def __init__( self, vocab_size=30522, hidden_size=768, num_hidden_layers=12, num_attention_heads=12, intermediate_size=3072, hidden_act="gelu", hidden_dropout_prob=0.1, attention_probs_dropout_prob=0.1, max_position_embeddings=512, type_vocab_size=2, initializer_range=0.02, layer_norm_eps=1e-12, pad_token_id=0, position_embedding_type="absolute", use_cache=True, **kwargs, ): super().__init__(**kwargs) self.vocab_size = vocab_size self.hidden_size = hidden_size self.num_hidden_layers = num_hidden_layers self.num_attention_heads = num_attention_heads self.hidden_act = hidden_act self.intermediate_size = intermediate_size self.hidden_dropout_prob = hidden_dropout_prob self.attention_probs_dropout_prob = attention_probs_dropout_prob self.max_position_embeddings = max_position_embeddings self.type_vocab_size = type_vocab_size self.initializer_range = initializer_range self.layer_norm_eps = layer_norm_eps self.position_embedding_type = position_embedding_type self.use_cache = use_cache self.pad_token_id = pad_token_id @classmethod def from_pretrained(cls, pretrained_model_name_or_path: Union[str, os.PathLike], **kwargs) -> "PretrainedConfig": cls._set_token_in_kwargs(kwargs) config_dict, kwargs = cls.get_config_dict(pretrained_model_name_or_path, **kwargs) # get the text config dict if we are loading from AlignConfig if config_dict.get("model_type") == "align": config_dict = config_dict["text_config"] if "model_type" in config_dict and hasattr(cls, "model_type") and config_dict["model_type"] != cls.model_type: logger.warning( f"You are using a model of type {config_dict['model_type']} to instantiate a model of type " f"{cls.model_type}. This is not supported for all configurations of models and can yield errors." ) return cls.from_dict(config_dict, **kwargs) class AlignVisionConfig(PretrainedConfig): r""" This is the configuration class to store the configuration of a [`AlignVisionModel`]. It is used to instantiate a ALIGN vision encoder according to the specified arguments, defining the model architecture. Instantiating a configuration with the defaults will yield a similar configuration to that of the vision encoder of the ALIGN [kakaobrain/align-base](https://huggingface.co/kakaobrain/align-base) architecture. The default values are copied from EfficientNet (efficientnet-b7) Configuration objects inherit from [`PretrainedConfig`] and can be used to control the model outputs. Read the documentation from [`PretrainedConfig`] for more information. Args: num_channels (`int`, *optional*, defaults to 3): The number of input channels. image_size (`int`, *optional*, defaults to 600): The input image size. width_coefficient (`float`, *optional*, defaults to 2.0): Scaling coefficient for network width at each stage. depth_coefficient (`float`, *optional*, defaults to 3.1): Scaling coefficient for network depth at each stage. depth_divisor `int`, *optional*, defaults to 8): A unit of network width. kernel_sizes (`List[int]`, *optional*, defaults to `[3, 3, 5, 3, 5, 5, 3]`): List of kernel sizes to be used in each block. in_channels (`List[int]`, *optional*, defaults to `[32, 16, 24, 40, 80, 112, 192]`): List of input channel sizes to be used in each block for convolutional layers. out_channels (`List[int]`, *optional*, defaults to `[16, 24, 40, 80, 112, 192, 320]`): List of output channel sizes to be used in each block for convolutional layers. depthwise_padding (`List[int]`, *optional*, defaults to `[]`): List of block indices with square padding. strides (`List[int]`, *optional*, defaults to `[1, 2, 2, 2, 1, 2, 1]`): List of stride sizes to be used in each block for convolutional layers. num_block_repeats (`List[int]`, *optional*, defaults to `[1, 2, 2, 3, 3, 4, 1]`): List of the number of times each block is to repeated. expand_ratios (`List[int]`, *optional*, defaults to `[1, 6, 6, 6, 6, 6, 6]`): List of scaling coefficient of each block. squeeze_expansion_ratio (`float`, *optional*, defaults to 0.25): Squeeze expansion ratio. hidden_act (`str` or `function`, *optional*, defaults to `"silu"`): The non-linear activation function (function or string) in each block. If string, `"gelu"`, `"relu"`, `"selu", `"gelu_new"`, `"silu"` and `"mish"` are supported. hiddem_dim (`int`, *optional*, defaults to 1280): The hidden dimension of the layer before the classification head. pooling_type (`str` or `function`, *optional*, defaults to `"mean"`): Type of final pooling to be applied before the dense classification head. Available options are [`"mean"`, `"max"`] initializer_range (`float`, *optional*, defaults to 0.02): The standard deviation of the truncated_normal_initializer for initializing all weight matrices. batch_norm_eps (`float`, *optional*, defaults to 1e-3): The epsilon used by the batch normalization layers. batch_norm_momentum (`float`, *optional*, defaults to 0.99): The momentum used by the batch normalization layers. drop_connect_rate (`float`, *optional*, defaults to 0.2): The drop rate for skip connections. Example: ```python >>> from transformers import AlignVisionConfig, AlignVisionModel >>> # Initializing a AlignVisionConfig with kakaobrain/align-base style configuration >>> configuration = AlignVisionConfig() >>> # Initializing a AlignVisionModel (with random weights) from the kakaobrain/align-base style configuration >>> model = AlignVisionModel(configuration) >>> # Accessing the model configuration >>> configuration = model.config ```""" model_type = "align_vision_model" def __init__( self, num_channels: int = 3, image_size: int = 600, width_coefficient: float = 2.0, depth_coefficient: float = 3.1, depth_divisor: int = 8, kernel_sizes: List[int] = [3, 3, 5, 3, 5, 5, 3], in_channels: List[int] = [32, 16, 24, 40, 80, 112, 192], out_channels: List[int] = [16, 24, 40, 80, 112, 192, 320], depthwise_padding: List[int] = [], strides: List[int] = [1, 2, 2, 2, 1, 2, 1], num_block_repeats: List[int] = [1, 2, 2, 3, 3, 4, 1], expand_ratios: List[int] = [1, 6, 6, 6, 6, 6, 6], squeeze_expansion_ratio: float = 0.25, hidden_act: str = "swish", hidden_dim: int = 2560, pooling_type: str = "mean", initializer_range: float = 0.02, batch_norm_eps: float = 0.001, batch_norm_momentum: float = 0.99, drop_connect_rate: float = 0.2, **kwargs, ): super().__init__(**kwargs) self.num_channels = num_channels self.image_size = image_size self.width_coefficient = width_coefficient self.depth_coefficient = depth_coefficient self.depth_divisor = depth_divisor self.kernel_sizes = kernel_sizes self.in_channels = in_channels self.out_channels = out_channels self.depthwise_padding = depthwise_padding self.strides = strides self.num_block_repeats = num_block_repeats self.expand_ratios = expand_ratios self.squeeze_expansion_ratio = squeeze_expansion_ratio self.hidden_act = hidden_act self.hidden_dim = hidden_dim self.pooling_type = pooling_type self.initializer_range = initializer_range self.batch_norm_eps = batch_norm_eps self.batch_norm_momentum = batch_norm_momentum self.drop_connect_rate = drop_connect_rate self.num_hidden_layers = sum(num_block_repeats) * 4 @classmethod def from_pretrained(cls, pretrained_model_name_or_path: Union[str, os.PathLike], **kwargs) -> "PretrainedConfig": cls._set_token_in_kwargs(kwargs) config_dict, kwargs = cls.get_config_dict(pretrained_model_name_or_path, **kwargs) # get the vision config dict if we are loading from AlignConfig if config_dict.get("model_type") == "align": config_dict = config_dict["vision_config"] if "model_type" in config_dict and hasattr(cls, "model_type") and config_dict["model_type"] != cls.model_type: logger.warning( f"You are using a model of type {config_dict['model_type']} to instantiate a model of type " f"{cls.model_type}. This is not supported for all configurations of models and can yield errors." ) return cls.from_dict(config_dict, **kwargs) class AlignConfig(PretrainedConfig): r""" [`AlignConfig`] is the configuration class to store the configuration of a [`AlignModel`]. It is used to instantiate a ALIGN model according to the specified arguments, defining the text model and vision model configs. Instantiating a configuration with the defaults will yield a similar configuration to that of the ALIGN [kakaobrain/align-base](https://huggingface.co/kakaobrain/align-base) architecture. Configuration objects inherit from [`PretrainedConfig`] and can be used to control the model outputs. Read the documentation from [`PretrainedConfig`] for more information. Args: text_config (`dict`, *optional*): Dictionary of configuration options used to initialize [`AlignTextConfig`]. vision_config (`dict`, *optional*): Dictionary of configuration options used to initialize [`AlignVisionConfig`]. projection_dim (`int`, *optional*, defaults to 640): Dimentionality of text and vision projection layers. temperature_init_value (`float`, *optional*, defaults to 1.0): The inital value of the *temperature* paramter. Default is used as per the original ALIGN implementation. initializer_range (`float`, *optional*, defaults to 0.02): The standard deviation of the truncated_normal_initializer for initializing all weight matrices. kwargs (*optional*): Dictionary of keyword arguments. Example: ```python >>> from transformers import AlignConfig, AlignModel >>> # Initializing a AlignConfig with kakaobrain/align-base style configuration >>> configuration = AlignConfig() >>> # Initializing a AlignModel (with random weights) from the kakaobrain/align-base style configuration >>> model = AlignModel(configuration) >>> # Accessing the model configuration >>> configuration = model.config >>> # We can also initialize a AlignConfig from a AlignTextConfig and a AlignVisionConfig >>> from transformers import AlignTextConfig, AlignVisionConfig >>> # Initializing ALIGN Text and Vision configurations >>> config_text = AlignTextConfig() >>> config_vision = AlignVisionConfig() >>> config = AlignConfig.from_text_vision_configs(config_text, config_vision) ```""" model_type = "align" def __init__( self, text_config=None, vision_config=None, projection_dim=640, temperature_init_value=1.0, initializer_range=0.02, **kwargs, ): super().__init__(**kwargs) if text_config is None: text_config = {} logger.info("text_config is None. Initializing the AlignTextConfig with default values.") if vision_config is None: vision_config = {} logger.info("vision_config is None. Initializing the AlignVisionConfig with default values.") self.text_config = AlignTextConfig(**text_config) self.vision_config = AlignVisionConfig(**vision_config) self.projection_dim = projection_dim self.temperature_init_value = temperature_init_value self.initializer_range = initializer_range @classmethod def from_text_vision_configs(cls, text_config: AlignTextConfig, vision_config: AlignVisionConfig, **kwargs): r""" Instantiate a [`AlignConfig`] (or a derived class) from align text model configuration and align vision model configuration. Returns: [`AlignConfig`]: An instance of a configuration object """ return cls(text_config=text_config.to_dict(), vision_config=vision_config.to_dict(), **kwargs)

transformers/src/transformers/models/align/configuration_align.py/0

{ "file_path": "transformers/src/transformers/models/align/configuration_align.py", "repo_id": "transformers", "token_count": 6879 }

72

# coding=utf-8 # Copyright 2021 The HuggingFace Inc. team. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. """ AutoFeatureExtractor class.""" import importlib import json import os import warnings from collections import OrderedDict from typing import Dict, Optional, Union # Build the list of all feature extractors from ...configuration_utils import PretrainedConfig from ...dynamic_module_utils import get_class_from_dynamic_module, resolve_trust_remote_code from ...feature_extraction_utils import FeatureExtractionMixin from ...utils import CONFIG_NAME, FEATURE_EXTRACTOR_NAME, get_file_from_repo, logging from .auto_factory import _LazyAutoMapping from .configuration_auto import ( CONFIG_MAPPING_NAMES, AutoConfig, model_type_to_module_name, replace_list_option_in_docstrings, ) logger = logging.get_logger(__name__) FEATURE_EXTRACTOR_MAPPING_NAMES = OrderedDict( [ ("audio-spectrogram-transformer", "ASTFeatureExtractor"), ("beit", "BeitFeatureExtractor"), ("chinese_clip", "ChineseCLIPFeatureExtractor"), ("clap", "ClapFeatureExtractor"), ("clip", "CLIPFeatureExtractor"), ("clipseg", "ViTFeatureExtractor"), ("clvp", "ClvpFeatureExtractor"), ("conditional_detr", "ConditionalDetrFeatureExtractor"), ("convnext", "ConvNextFeatureExtractor"), ("cvt", "ConvNextFeatureExtractor"), ("data2vec-audio", "Wav2Vec2FeatureExtractor"), ("data2vec-vision", "BeitFeatureExtractor"), ("deformable_detr", "DeformableDetrFeatureExtractor"), ("deit", "DeiTFeatureExtractor"), ("detr", "DetrFeatureExtractor"), ("dinat", "ViTFeatureExtractor"), ("donut-swin", "DonutFeatureExtractor"), ("dpt", "DPTFeatureExtractor"), ("encodec", "EncodecFeatureExtractor"), ("flava", "FlavaFeatureExtractor"), ("glpn", "GLPNFeatureExtractor"), ("groupvit", "CLIPFeatureExtractor"), ("hubert", "Wav2Vec2FeatureExtractor"), ("imagegpt", "ImageGPTFeatureExtractor"), ("layoutlmv2", "LayoutLMv2FeatureExtractor"), ("layoutlmv3", "LayoutLMv3FeatureExtractor"), ("levit", "LevitFeatureExtractor"), ("maskformer", "MaskFormerFeatureExtractor"), ("mctct", "MCTCTFeatureExtractor"), ("mobilenet_v1", "MobileNetV1FeatureExtractor"), ("mobilenet_v2", "MobileNetV2FeatureExtractor"), ("mobilevit", "MobileViTFeatureExtractor"), ("nat", "ViTFeatureExtractor"), ("owlvit", "OwlViTFeatureExtractor"), ("perceiver", "PerceiverFeatureExtractor"), ("poolformer", "PoolFormerFeatureExtractor"), ("pop2piano", "Pop2PianoFeatureExtractor"), ("regnet", "ConvNextFeatureExtractor"), ("resnet", "ConvNextFeatureExtractor"), ("seamless_m4t", "SeamlessM4TFeatureExtractor"), ("seamless_m4t_v2", "SeamlessM4TFeatureExtractor"), ("segformer", "SegformerFeatureExtractor"), ("sew", "Wav2Vec2FeatureExtractor"), ("sew-d", "Wav2Vec2FeatureExtractor"), ("speech_to_text", "Speech2TextFeatureExtractor"), ("speecht5", "SpeechT5FeatureExtractor"), ("swiftformer", "ViTFeatureExtractor"), ("swin", "ViTFeatureExtractor"), ("swinv2", "ViTFeatureExtractor"), ("table-transformer", "DetrFeatureExtractor"), ("timesformer", "VideoMAEFeatureExtractor"), ("tvlt", "TvltFeatureExtractor"), ("unispeech", "Wav2Vec2FeatureExtractor"), ("unispeech-sat", "Wav2Vec2FeatureExtractor"), ("univnet", "UnivNetFeatureExtractor"), ("van", "ConvNextFeatureExtractor"), ("videomae", "VideoMAEFeatureExtractor"), ("vilt", "ViltFeatureExtractor"), ("vit", "ViTFeatureExtractor"), ("vit_mae", "ViTFeatureExtractor"), ("vit_msn", "ViTFeatureExtractor"), ("wav2vec2", "Wav2Vec2FeatureExtractor"), ("wav2vec2-bert", "Wav2Vec2FeatureExtractor"), ("wav2vec2-conformer", "Wav2Vec2FeatureExtractor"), ("wavlm", "Wav2Vec2FeatureExtractor"), ("whisper", "WhisperFeatureExtractor"), ("xclip", "CLIPFeatureExtractor"), ("yolos", "YolosFeatureExtractor"), ] ) FEATURE_EXTRACTOR_MAPPING = _LazyAutoMapping(CONFIG_MAPPING_NAMES, FEATURE_EXTRACTOR_MAPPING_NAMES) def feature_extractor_class_from_name(class_name: str): for module_name, extractors in FEATURE_EXTRACTOR_MAPPING_NAMES.items(): if class_name in extractors: module_name = model_type_to_module_name(module_name) module = importlib.import_module(f".{module_name}", "transformers.models") try: return getattr(module, class_name) except AttributeError: continue for _, extractor in FEATURE_EXTRACTOR_MAPPING._extra_content.items(): if getattr(extractor, "__name__", None) == class_name: return extractor # We did not fine the class, but maybe it's because a dep is missing. In that case, the class will be in the main # init and we return the proper dummy to get an appropriate error message. main_module = importlib.import_module("transformers") if hasattr(main_module, class_name): return getattr(main_module, class_name) return None def get_feature_extractor_config( pretrained_model_name_or_path: Union[str, os.PathLike], cache_dir: Optional[Union[str, os.PathLike]] = None, force_download: bool = False, resume_download: bool = False, proxies: Optional[Dict[str, str]] = None, token: Optional[Union[bool, str]] = None, revision: Optional[str] = None, local_files_only: bool = False, **kwargs, ): """ Loads the tokenizer configuration from a pretrained model tokenizer configuration. Args: pretrained_model_name_or_path (`str` or `os.PathLike`): This can be either: - a string, the *model id* of a pretrained model configuration hosted inside a model repo on huggingface.co. - a path to a *directory* containing a configuration file saved using the [`~PreTrainedTokenizer.save_pretrained`] method, e.g., `./my_model_directory/`. cache_dir (`str` or `os.PathLike`, *optional*): Path to a directory in which a downloaded pretrained model configuration should be cached if the standard cache should not be used. force_download (`bool`, *optional*, defaults to `False`): Whether or not to force to (re-)download the configuration files and override the cached versions if they exist. resume_download (`bool`, *optional*, defaults to `False`): Whether or not to delete incompletely received file. Attempts to resume the download if such a file exists. proxies (`Dict[str, str]`, *optional*): A dictionary of proxy servers to use by protocol or endpoint, e.g., `{'http': 'foo.bar:3128', 'http://hostname': 'foo.bar:4012'}.` The proxies are used on each request. token (`str` or *bool*, *optional*): The token to use as HTTP bearer authorization for remote files. If `True`, will use the token generated when running `huggingface-cli login` (stored in `~/.huggingface`). revision (`str`, *optional*, defaults to `"main"`): The specific model version to use. It can be a branch name, a tag name, or a commit id, since we use a git-based system for storing models and other artifacts on huggingface.co, so `revision` can be any identifier allowed by git. local_files_only (`bool`, *optional*, defaults to `False`): If `True`, will only try to load the tokenizer configuration from local files. <Tip> Passing `token=True` is required when you want to use a private model. </Tip> Returns: `Dict`: The configuration of the tokenizer. Examples: ```python # Download configuration from huggingface.co and cache. tokenizer_config = get_tokenizer_config("google-bert/bert-base-uncased") # This model does not have a tokenizer config so the result will be an empty dict. tokenizer_config = get_tokenizer_config("FacebookAI/xlm-roberta-base") # Save a pretrained tokenizer locally and you can reload its config from transformers import AutoTokenizer tokenizer = AutoTokenizer.from_pretrained("google-bert/bert-base-cased") tokenizer.save_pretrained("tokenizer-test") tokenizer_config = get_tokenizer_config("tokenizer-test") ```""" use_auth_token = kwargs.pop("use_auth_token", None) if use_auth_token is not None: warnings.warn( "The `use_auth_token` argument is deprecated and will be removed in v5 of Transformers. Please use `token` instead.", FutureWarning, ) if token is not None: raise ValueError("`token` and `use_auth_token` are both specified. Please set only the argument `token`.") token = use_auth_token resolved_config_file = get_file_from_repo( pretrained_model_name_or_path, FEATURE_EXTRACTOR_NAME, cache_dir=cache_dir, force_download=force_download, resume_download=resume_download, proxies=proxies, token=token, revision=revision, local_files_only=local_files_only, ) if resolved_config_file is None: logger.info( "Could not locate the feature extractor configuration file, will try to use the model config instead." ) return {} with open(resolved_config_file, encoding="utf-8") as reader: return json.load(reader) class AutoFeatureExtractor: r""" This is a generic feature extractor class that will be instantiated as one of the feature extractor classes of the library when created with the [`AutoFeatureExtractor.from_pretrained`] class method. This class cannot be instantiated directly using `__init__()` (throws an error). """ def __init__(self): raise EnvironmentError( "AutoFeatureExtractor is designed to be instantiated " "using the `AutoFeatureExtractor.from_pretrained(pretrained_model_name_or_path)` method." ) @classmethod @replace_list_option_in_docstrings(FEATURE_EXTRACTOR_MAPPING_NAMES) def from_pretrained(cls, pretrained_model_name_or_path, **kwargs): r""" Instantiate one of the feature extractor classes of the library from a pretrained model vocabulary. The feature extractor class to instantiate is selected based on the `model_type` property of the config object (either passed as an argument or loaded from `pretrained_model_name_or_path` if possible), or when it's missing, by falling back to using pattern matching on `pretrained_model_name_or_path`: List options Params: pretrained_model_name_or_path (`str` or `os.PathLike`): This can be either: - a string, the *model id* of a pretrained feature_extractor hosted inside a model repo on huggingface.co. - a path to a *directory* containing a feature extractor file saved using the [`~feature_extraction_utils.FeatureExtractionMixin.save_pretrained`] method, e.g., `./my_model_directory/`. - a path or url to a saved feature extractor JSON *file*, e.g., `./my_model_directory/preprocessor_config.json`. cache_dir (`str` or `os.PathLike`, *optional*): Path to a directory in which a downloaded pretrained model feature extractor should be cached if the standard cache should not be used. force_download (`bool`, *optional*, defaults to `False`): Whether or not to force to (re-)download the feature extractor files and override the cached versions if they exist. resume_download (`bool`, *optional*, defaults to `False`): Whether or not to delete incompletely received file. Attempts to resume the download if such a file exists. proxies (`Dict[str, str]`, *optional*): A dictionary of proxy servers to use by protocol or endpoint, e.g., `{'http': 'foo.bar:3128', 'http://hostname': 'foo.bar:4012'}.` The proxies are used on each request. token (`str` or *bool*, *optional*): The token to use as HTTP bearer authorization for remote files. If `True`, will use the token generated when running `huggingface-cli login` (stored in `~/.huggingface`). revision (`str`, *optional*, defaults to `"main"`): The specific model version to use. It can be a branch name, a tag name, or a commit id, since we use a git-based system for storing models and other artifacts on huggingface.co, so `revision` can be any identifier allowed by git. return_unused_kwargs (`bool`, *optional*, defaults to `False`): If `False`, then this function returns just the final feature extractor object. If `True`, then this functions returns a `Tuple(feature_extractor, unused_kwargs)` where *unused_kwargs* is a dictionary consisting of the key/value pairs whose keys are not feature extractor attributes: i.e., the part of `kwargs` which has not been used to update `feature_extractor` and is otherwise ignored. trust_remote_code (`bool`, *optional*, defaults to `False`): Whether or not to allow for custom models defined on the Hub in their own modeling files. This option should only be set to `True` for repositories you trust and in which you have read the code, as it will execute code present on the Hub on your local machine. kwargs (`Dict[str, Any]`, *optional*): The values in kwargs of any keys which are feature extractor attributes will be used to override the loaded values. Behavior concerning key/value pairs whose keys are *not* feature extractor attributes is controlled by the `return_unused_kwargs` keyword parameter. <Tip> Passing `token=True` is required when you want to use a private model. </Tip> Examples: ```python >>> from transformers import AutoFeatureExtractor >>> # Download feature extractor from huggingface.co and cache. >>> feature_extractor = AutoFeatureExtractor.from_pretrained("facebook/wav2vec2-base-960h") >>> # If feature extractor files are in a directory (e.g. feature extractor was saved using *save_pretrained('./test/saved_model/')*) >>> # feature_extractor = AutoFeatureExtractor.from_pretrained("./test/saved_model/") ```""" use_auth_token = kwargs.pop("use_auth_token", None) if use_auth_token is not None: warnings.warn( "The `use_auth_token` argument is deprecated and will be removed in v5 of Transformers. Please use `token` instead.", FutureWarning, ) if kwargs.get("token", None) is not None: raise ValueError( "`token` and `use_auth_token` are both specified. Please set only the argument `token`." ) kwargs["token"] = use_auth_token config = kwargs.pop("config", None) trust_remote_code = kwargs.pop("trust_remote_code", None) kwargs["_from_auto"] = True config_dict, _ = FeatureExtractionMixin.get_feature_extractor_dict(pretrained_model_name_or_path, **kwargs) feature_extractor_class = config_dict.get("feature_extractor_type", None) feature_extractor_auto_map = None if "AutoFeatureExtractor" in config_dict.get("auto_map", {}): feature_extractor_auto_map = config_dict["auto_map"]["AutoFeatureExtractor"] # If we don't find the feature extractor class in the feature extractor config, let's try the model config. if feature_extractor_class is None and feature_extractor_auto_map is None: if not isinstance(config, PretrainedConfig): config = AutoConfig.from_pretrained(pretrained_model_name_or_path, **kwargs) # It could be in `config.feature_extractor_type`` feature_extractor_class = getattr(config, "feature_extractor_type", None) if hasattr(config, "auto_map") and "AutoFeatureExtractor" in config.auto_map: feature_extractor_auto_map = config.auto_map["AutoFeatureExtractor"] if feature_extractor_class is not None: feature_extractor_class = feature_extractor_class_from_name(feature_extractor_class) has_remote_code = feature_extractor_auto_map is not None has_local_code = feature_extractor_class is not None or type(config) in FEATURE_EXTRACTOR_MAPPING trust_remote_code = resolve_trust_remote_code( trust_remote_code, pretrained_model_name_or_path, has_local_code, has_remote_code ) if has_remote_code and trust_remote_code: feature_extractor_class = get_class_from_dynamic_module( feature_extractor_auto_map, pretrained_model_name_or_path, **kwargs ) _ = kwargs.pop("code_revision", None) if os.path.isdir(pretrained_model_name_or_path): feature_extractor_class.register_for_auto_class() return feature_extractor_class.from_dict(config_dict, **kwargs) elif feature_extractor_class is not None: return feature_extractor_class.from_dict(config_dict, **kwargs) # Last try: we use the FEATURE_EXTRACTOR_MAPPING. elif type(config) in FEATURE_EXTRACTOR_MAPPING: feature_extractor_class = FEATURE_EXTRACTOR_MAPPING[type(config)] return feature_extractor_class.from_dict(config_dict, **kwargs) raise ValueError( f"Unrecognized feature extractor in {pretrained_model_name_or_path}. Should have a " f"`feature_extractor_type` key in its {FEATURE_EXTRACTOR_NAME} of {CONFIG_NAME}, or one of the following " f"`model_type` keys in its {CONFIG_NAME}: {', '.join(c for c in FEATURE_EXTRACTOR_MAPPING_NAMES.keys())}" ) @staticmethod def register(config_class, feature_extractor_class, exist_ok=False): """ Register a new feature extractor for this class. Args: config_class ([`PretrainedConfig`]): The configuration corresponding to the model to register. feature_extractor_class ([`FeatureExtractorMixin`]): The feature extractor to register. """ FEATURE_EXTRACTOR_MAPPING.register(config_class, feature_extractor_class, exist_ok=exist_ok)

transformers/src/transformers/models/auto/feature_extraction_auto.py/0

{ "file_path": "transformers/src/transformers/models/auto/feature_extraction_auto.py", "repo_id": "transformers", "token_count": 7703 }

73

# Copyright 2020 The HuggingFace Team. All rights reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. from typing import TYPE_CHECKING from ...utils import ( OptionalDependencyNotAvailable, _LazyModule, is_flax_available, is_tf_available, is_tokenizers_available, is_torch_available, ) _import_structure = { "configuration_bart": ["BART_PRETRAINED_CONFIG_ARCHIVE_MAP", "BartConfig", "BartOnnxConfig"], "tokenization_bart": ["BartTokenizer"], } try: if not is_tokenizers_available(): raise OptionalDependencyNotAvailable() except OptionalDependencyNotAvailable: pass else: _import_structure["tokenization_bart_fast"] = ["BartTokenizerFast"] try: if not is_torch_available(): raise OptionalDependencyNotAvailable() except OptionalDependencyNotAvailable: pass else: _import_structure["modeling_bart"] = [ "BART_PRETRAINED_MODEL_ARCHIVE_LIST", "BartForCausalLM", "BartForConditionalGeneration", "BartForQuestionAnswering", "BartForSequenceClassification", "BartModel", "BartPreTrainedModel", "BartPretrainedModel", "PretrainedBartModel", ] try: if not is_tf_available(): raise OptionalDependencyNotAvailable() except OptionalDependencyNotAvailable: pass else: _import_structure["modeling_tf_bart"] = [ "TFBartForConditionalGeneration", "TFBartForSequenceClassification", "TFBartModel", "TFBartPretrainedModel", ] try: if not is_flax_available(): raise OptionalDependencyNotAvailable() except OptionalDependencyNotAvailable: pass else: _import_structure["modeling_flax_bart"] = [ "FlaxBartDecoderPreTrainedModel", "FlaxBartForCausalLM", "FlaxBartForConditionalGeneration", "FlaxBartForQuestionAnswering", "FlaxBartForSequenceClassification", "FlaxBartModel", "FlaxBartPreTrainedModel", ] if TYPE_CHECKING: from .configuration_bart import BART_PRETRAINED_CONFIG_ARCHIVE_MAP, BartConfig, BartOnnxConfig from .tokenization_bart import BartTokenizer try: if not is_tokenizers_available(): raise OptionalDependencyNotAvailable() except OptionalDependencyNotAvailable: pass else: from .tokenization_bart_fast import BartTokenizerFast try: if not is_torch_available(): raise OptionalDependencyNotAvailable() except OptionalDependencyNotAvailable: pass else: from .modeling_bart import ( BART_PRETRAINED_MODEL_ARCHIVE_LIST, BartForCausalLM, BartForConditionalGeneration, BartForQuestionAnswering, BartForSequenceClassification, BartModel, BartPreTrainedModel, BartPretrainedModel, PretrainedBartModel, ) try: if not is_tf_available(): raise OptionalDependencyNotAvailable() except OptionalDependencyNotAvailable: pass else: from .modeling_tf_bart import ( TFBartForConditionalGeneration, TFBartForSequenceClassification, TFBartModel, TFBartPretrainedModel, ) try: if not is_flax_available(): raise OptionalDependencyNotAvailable() except OptionalDependencyNotAvailable: pass else: from .modeling_flax_bart import ( FlaxBartDecoderPreTrainedModel, FlaxBartForCausalLM, FlaxBartForConditionalGeneration, FlaxBartForQuestionAnswering, FlaxBartForSequenceClassification, FlaxBartModel, FlaxBartPreTrainedModel, ) else: import sys sys.modules[__name__] = _LazyModule(__name__, globals()["__file__"], _import_structure, module_spec=__spec__)

transformers/src/transformers/models/bart/__init__.py/0

{ "file_path": "transformers/src/transformers/models/bart/__init__.py", "repo_id": "transformers", "token_count": 1839 }

74

# coding=utf-8 # Copyright 2022 The Salesforce Team Authors and The HuggingFace Team. All rights reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. """ PyTorch BLIP model.""" import warnings from dataclasses import dataclass from typing import Any, Optional, Tuple, Union import torch import torch.utils.checkpoint from torch import nn from torch.nn.functional import normalize from ...activations import ACT2FN from ...modeling_outputs import BaseModelOutput, BaseModelOutputWithPooling from ...modeling_utils import PreTrainedModel from ...utils import ( ModelOutput, add_start_docstrings, add_start_docstrings_to_model_forward, logging, replace_return_docstrings, ) from .configuration_blip import BlipConfig, BlipTextConfig, BlipVisionConfig from .modeling_blip_text import BlipTextLMHeadModel, BlipTextModel logger = logging.get_logger(__name__) _CHECKPOINT_FOR_DOC = "Salesforce/blip-vqa-base" BLIP_PRETRAINED_MODEL_ARCHIVE_LIST = [ "Salesforce/blip-vqa-base", "Salesforce/blip-vqa-capfilt-large", "Salesforce/blip-image-captioning-base", "Salesforce/blip-image-captioning-large", "Salesforce/blip-itm-base-coco", "Salesforce/blip-itm-large-coco", "Salesforce/blip-itm-base-flickr", "Salesforce/blip-itm-large-flickr", # See all BLIP models at https://huggingface.co/models?filter=blip ] # Copied from transformers.models.clip.modeling_clip.contrastive_loss def contrastive_loss(logits: torch.Tensor) -> torch.Tensor: return nn.functional.cross_entropy(logits, torch.arange(len(logits), device=logits.device)) # Copied from transformers.models.clip.modeling_clip.clip_loss with clip->blip def blip_loss(similarity: torch.Tensor) -> torch.Tensor: caption_loss = contrastive_loss(similarity) image_loss = contrastive_loss(similarity.t()) return (caption_loss + image_loss) / 2.0 @dataclass class BlipForConditionalGenerationModelOutput(ModelOutput): """ Adapted from the base class for vision model's outputs that also contains image embeddings of the pooling of the last hidden states. This class also adds the loss term from the text decoder. Args: loss (`torch.FloatTensor`, *optional*, returned when `labels` is provided, `torch.FloatTensor` of shape `(1,)`): Languge modeling loss from the text decoder. logits (`torch.FloatTensor` of shape `(batch_size, sequence_length, config.vocab_size)`, *optional*): Prediction scores of the language modeling head of the text decoder model. image_embeds (`torch.FloatTensor` of shape `(batch_size, output_dim)`, *optional*): The image embeddings obtained after applying the Vision Transformer model to the input image. last_hidden_state (`torch.FloatTensor` of shape `(batch_size, sequence_length, hidden_size)`, *optional*): Sequence of hidden-states at the output of the last layer of the model. hidden_states (`tuple(torch.FloatTensor)`, *optional*, returned when `output_hidden_states=True`): Tuple of `torch.FloatTensor` (one for the output of the embeddings, if the model has an embedding layer, + one for the output of each layer) of shape `(batch_size, sequence_length, hidden_size)`. Hidden-states of the model at the output of each layer plus the optional initial embedding outputs. attentions (`tuple(torch.FloatTensor)`, *optional*, returned when `output_attentions=True` is passed): Tuple of `torch.FloatTensor` (one for each layer) of shape `(batch_size, num_heads, sequence_length, sequence_length)`. Attentions weights after the attention softmax, used to compute the weighted average in the self-attention heads. """ loss: Optional[Tuple[torch.FloatTensor]] = None logits: Optional[Tuple[torch.FloatTensor]] = None image_embeds: Optional[torch.FloatTensor] = None last_hidden_state: torch.FloatTensor = None hidden_states: Optional[Tuple[torch.FloatTensor, ...]] = None attentions: Optional[Tuple[torch.FloatTensor, ...]] = None @property def decoder_logits(self): warnings.warn( "`decoder_logits` attribute is deprecated and will be removed in version 5 of Transformers." " Please use the `logits` attribute to retrieve the final output instead.", FutureWarning, ) return self.logits @dataclass class BlipTextVisionModelOutput(ModelOutput): """ Adapted from the base class for vision model's outputs that also contains image embeddings of the pooling of the last hidden states. This class also adds the loss term from the text decoder. Args: loss (`torch.FloatTensor` of shape `(1,)`, *optional*, returned when `labels` is provided): Languge modeling loss from the text decoder. image_embeds (`torch.FloatTensor` of shape `(batch_size, output_dim)` *optional* returned when model is initialized with `with_projection=True`): The image embeddings obtained by applying the projection layer to the pooler_output. last_hidden_state (`torch.FloatTensor` of shape `(batch_size, sequence_length, hidden_size)`): Sequence of hidden-states at the output of the last layer of the model. hidden_states (`tuple(torch.FloatTensor)`, *optional*, returned when `output_hidden_states=True` is passed or when `config.output_hidden_states=True`): Tuple of `torch.FloatTensor` (one for the output of the embeddings, if the model has an embedding layer, + one for the output of each layer) of shape `(batch_size, sequence_length, hidden_size)`. Hidden-states of the model at the output of each layer plus the optional initial embedding outputs. attentions (`tuple(torch.FloatTensor)`, *optional*, returned when `output_attentions=True` is passed or when `config.output_attentions=True`): Tuple of `torch.FloatTensor` (one for each layer) of shape `(batch_size, num_heads, sequence_length, sequence_length)`. Attentions weights after the attention softmax, used to compute the weighted average in the self-attention heads. """ loss: Optional[torch.FloatTensor] = None image_embeds: Optional[torch.FloatTensor] = None last_hidden_state: torch.FloatTensor = None hidden_states: Optional[Tuple[torch.FloatTensor, ...]] = None attentions: Optional[Tuple[torch.FloatTensor, ...]] = None @dataclass class BlipImageTextMatchingModelOutput(ModelOutput): """ Adapted from the base class for vision model's outputs that also contains image embeddings of the pooling of the last hidden states. This class also adds the loss term from the text decoder as well as the image-text similarity scores. Args: itm_score (`torch.FloatTensor`): The image-text similarity scores. loss (`torch.FloatTensor` of shape `(1,)`, *optional*, returned when `labels` is provided): Languge modeling loss from the text decoder. image_embeds (`torch.FloatTensor` of shape `(batch_size, output_dim)` *optional* returned when model is initialized with `with_projection=True`): The image embeddings obtained by applying the projection layer to the pooler_output. last_hidden_state (`torch.FloatTensor` of shape `(batch_size, sequence_length, hidden_size)`): Sequence of hidden-states at the output of the last layer of the model. hidden_states (`tuple(torch.FloatTensor)`, *optional*, returned when `output_hidden_states=True` is passed or when `config.output_hidden_states=True`): Tuple of `torch.FloatTensor` (one for the output of the embeddings, if the model has an embedding layer, + one for the output of each layer) of shape `(batch_size, sequence_length, hidden_size)`. Hidden-states of the model at the output of each layer plus the optional initial embedding outputs. vision_pooler_output (`torch.FloatTensor` of shape `(batch_size, hidden_size)`, *optional*): Last layer hidden-state of the vision of the vision-only branch of the model. attentions (`tuple(torch.FloatTensor)`, *optional*, returned when `output_attentions=True` is passed or when `config.output_attentions=True`): Tuple of `torch.FloatTensor` (one for each layer) of shape `(batch_size, num_heads, sequence_length, sequence_length)`. Attentions weights after the attention softmax, used to compute the weighted average in the self-attention heads. question_embeds (`torch.FloatTensor`): The question embeddings obtained by the text projection layer. """ itm_score: Optional[torch.FloatTensor] = None loss: Optional[torch.FloatTensor] = None image_embeds: Optional[torch.FloatTensor] = None last_hidden_state: torch.FloatTensor = None hidden_states: Optional[Tuple[torch.FloatTensor, ...]] = None vision_pooler_output: Optional[torch.FloatTensor] = None attentions: Optional[Tuple[torch.FloatTensor, ...]] = None question_embeds: Optional[Tuple[torch.FloatTensor]] = None @dataclass class BlipOutput(ModelOutput): """ Args: loss (`torch.FloatTensor` of shape `(1,)`, *optional*, returned when `return_loss` is `True`): Contrastive loss for image-text similarity. logits_per_image:(`torch.FloatTensor` of shape `(image_batch_size, text_batch_size)`): The scaled dot product scores between `image_embeds` and `text_embeds`. This represents the image-text similarity scores. logits_per_text:(`torch.FloatTensor` of shape `(text_batch_size, image_batch_size)`): The scaled dot product scores between `text_embeds` and `image_embeds`. This represents the text-image similarity scores. text_embeds(`torch.FloatTensor` of shape `(batch_size, output_dim`): The text embeddings obtained by applying the projection layer to the pooled output of [`BlipTextModel`]. image_embeds(`torch.FloatTensor` of shape `(batch_size, output_dim`): The image embeddings obtained by applying the projection layer to the pooled output of [`BlipVisionModel`]. text_model_output(`BaseModelOutputWithPooling`): The output of the [`BlipTextModel`]. vision_model_output(`BaseModelOutputWithPooling`): The output of the [`BlipVisionModel`]. """ loss: Optional[torch.FloatTensor] = None logits_per_image: torch.FloatTensor = None logits_per_text: torch.FloatTensor = None text_embeds: torch.FloatTensor = None image_embeds: torch.FloatTensor = None text_model_output: BaseModelOutputWithPooling = None vision_model_output: BaseModelOutputWithPooling = None def to_tuple(self) -> Tuple[Any]: return tuple( self[k] if k not in ["text_model_output", "vision_model_output"] else getattr(self, k).to_tuple() for k in self.keys() ) class BlipVisionEmbeddings(nn.Module): def __init__(self, config: BlipVisionConfig): super().__init__() self.config = config self.embed_dim = config.hidden_size self.image_size = config.image_size self.patch_size = config.patch_size self.class_embedding = nn.Parameter(torch.randn(1, 1, self.embed_dim)) self.patch_embedding = nn.Conv2d( in_channels=3, out_channels=self.embed_dim, kernel_size=self.patch_size, stride=self.patch_size ) self.num_patches = (self.image_size // self.patch_size) ** 2 self.num_positions = self.num_patches + 1 self.position_embedding = nn.Parameter(torch.randn(1, self.num_positions, self.embed_dim)) def forward(self, pixel_values: torch.FloatTensor) -> torch.Tensor: batch_size = pixel_values.shape[0] target_dtype = self.patch_embedding.weight.dtype patch_embeds = self.patch_embedding(pixel_values.to(dtype=target_dtype)) # shape = [*, width, grid, grid] patch_embeds = patch_embeds.flatten(2).transpose(1, 2) class_embeds = self.class_embedding.expand(batch_size, 1, -1).to(target_dtype) embeddings = torch.cat([class_embeds, patch_embeds], dim=1) embeddings = embeddings + self.position_embedding[:, : embeddings.size(1), :].to(target_dtype) return embeddings # Copied from transformers.models.clip.modeling_clip.CLIPTextEmbeddings with CLIP->Blip class BlipTextEmbeddings(nn.Module): def __init__(self, config: BlipTextConfig): super().__init__() embed_dim = config.hidden_size self.token_embedding = nn.Embedding(config.vocab_size, embed_dim) self.position_embedding = nn.Embedding(config.max_position_embeddings, embed_dim) # position_ids (1, len position emb) is contiguous in memory and exported when serialized self.register_buffer( "position_ids", torch.arange(config.max_position_embeddings).expand((1, -1)), persistent=False ) def forward( self, input_ids: Optional[torch.LongTensor] = None, position_ids: Optional[torch.LongTensor] = None, inputs_embeds: Optional[torch.FloatTensor] = None, ) -> torch.Tensor: seq_length = input_ids.shape[-1] if input_ids is not None else inputs_embeds.shape[-2] if position_ids is None: position_ids = self.position_ids[:, :seq_length] if inputs_embeds is None: inputs_embeds = self.token_embedding(input_ids) position_embeddings = self.position_embedding(position_ids) embeddings = inputs_embeds + position_embeddings return embeddings class BlipAttention(nn.Module): """Multi-headed attention from 'Attention Is All You Need' paper""" def __init__(self, config): super().__init__() self.config = config self.embed_dim = config.hidden_size self.num_heads = config.num_attention_heads self.head_dim = self.embed_dim // self.num_heads if self.head_dim * self.num_heads != self.embed_dim: raise ValueError( f"embed_dim must be divisible by num_heads (got `embed_dim`: {self.embed_dim} and `num_heads`:" f" {self.num_heads})." ) self.scale = self.head_dim**-0.5 self.dropout = nn.Dropout(config.attention_dropout) self.qkv = nn.Linear(self.embed_dim, 3 * self.embed_dim) self.projection = nn.Linear(self.embed_dim, self.embed_dim) def _shape(self, tensor: torch.Tensor, seq_len: int, bsz: int): return tensor.view(bsz, seq_len, self.num_heads, self.head_dim).transpose(1, 2).contiguous() def forward( self, hidden_states: torch.Tensor, head_mask: Optional[torch.Tensor] = None, output_attentions: Optional[bool] = False, ) -> Tuple[torch.Tensor, Optional[torch.Tensor], Optional[Tuple[torch.Tensor]]]: """Input shape: Batch x Time x Channel""" bsz, tgt_len, embed_dim = hidden_states.size() mixed_qkv = ( self.qkv(hidden_states) .reshape(bsz, tgt_len, 3, self.num_heads, embed_dim // self.num_heads) .permute(2, 0, 3, 1, 4) ) query_states, key_states, value_states = mixed_qkv[0], mixed_qkv[1], mixed_qkv[2] # Take the dot product between "query" and "key" to get the raw attention scores. attention_scores = torch.matmul(query_states, key_states.transpose(-1, -2)) attention_scores = attention_scores * self.scale # Normalize the attention scores to probabilities. attention_probs = nn.functional.softmax(attention_scores, dim=-1) # This is actually dropping out entire tokens to attend to, which might # seem a bit unusual, but is taken from the original Transformer paper. attention_probs = self.dropout(attention_probs) # Mask heads if we want to if head_mask is not None: attention_probs = attention_probs * head_mask context_layer = torch.matmul(attention_probs, value_states).permute(0, 2, 1, 3) new_context_layer_shape = context_layer.size()[:-2] + (self.embed_dim,) context_layer = context_layer.reshape(new_context_layer_shape) output = self.projection(context_layer) outputs = (output, attention_probs) if output_attentions else (output, None) return outputs # Copied from transformers.models.clip.modeling_clip.CLIPMLP with CLIP->Blip class BlipMLP(nn.Module): def __init__(self, config): super().__init__() self.config = config self.activation_fn = ACT2FN[config.hidden_act] self.fc1 = nn.Linear(config.hidden_size, config.intermediate_size) self.fc2 = nn.Linear(config.intermediate_size, config.hidden_size) def forward(self, hidden_states: torch.Tensor) -> torch.Tensor: hidden_states = self.fc1(hidden_states) hidden_states = self.activation_fn(hidden_states) hidden_states = self.fc2(hidden_states) return hidden_states class BlipEncoderLayer(nn.Module): def __init__(self, config: BlipConfig): super().__init__() self.embed_dim = config.hidden_size self.self_attn = BlipAttention(config) self.layer_norm1 = nn.LayerNorm(self.embed_dim, eps=config.layer_norm_eps) self.mlp = BlipMLP(config) self.layer_norm2 = nn.LayerNorm(self.embed_dim, eps=config.layer_norm_eps) def forward( self, hidden_states: torch.Tensor, attention_mask: torch.Tensor, output_attentions: Optional[bool] = False, ) -> Tuple[torch.FloatTensor]: """ Args: hidden_states (`torch.FloatTensor`): input to the layer of shape `(batch, seq_len, embed_dim)` attention_mask (`torch.FloatTensor`): attention mask of size `(batch, 1, tgt_len, src_len)` where padding elements are indicated by very large negative values. `(config.encoder_attention_heads,)`. output_attentions (`bool`, *optional*): Whether or not to return the attentions tensors of all attention layers. See `attentions` under returned tensors for more detail. """ residual = hidden_states hidden_states = self.layer_norm1(hidden_states) hidden_states, attn_weights = self.self_attn( hidden_states=hidden_states, head_mask=attention_mask, output_attentions=output_attentions, ) hidden_states = hidden_states + residual residual = hidden_states hidden_states = self.layer_norm2(hidden_states) hidden_states = self.mlp(hidden_states) hidden_states = hidden_states + residual outputs = (hidden_states,) if output_attentions: outputs += (attn_weights,) return outputs class BlipPreTrainedModel(PreTrainedModel): """ An abstract class to handle weights initialization and a simple interface for downloading and loading pretrained models. """ config_class = BlipConfig base_model_prefix = "blip" supports_gradient_checkpointing = True def _init_weights(self, module): """Initialize the weights""" factor = self.config.initializer_range if isinstance(module, nn.Conv2d) or isinstance(module, nn.Embedding) or isinstance(module, nn.Linear): module.weight.data.normal_(mean=0.0, std=factor) if hasattr(module, "bias") and module.bias is not None: module.bias.data.zero_() if isinstance(module, BlipVisionEmbeddings): if hasattr(self.config, "vision_config"): factor = self.config.vision_config.initializer_range nn.init.trunc_normal_( module.position_embedding, mean=0.0, std=factor, ) nn.init.trunc_normal_( module.class_embedding, mean=0.0, std=factor, ) elif isinstance(module, nn.LayerNorm): module.bias.data.zero_() module.weight.data.fill_(1.0) elif isinstance(module, nn.Linear) and module.bias is not None: module.bias.data.zero_() BLIP_START_DOCSTRING = r""" This model inherits from [`PreTrainedModel`]. Check the superclass documentation for the generic methods the library implements for all its model (such as downloading or saving, resizing the input embeddings, pruning heads etc.) This model is also a PyTorch [torch.nn.Module](https://pytorch.org/docs/stable/nn.html#torch.nn.Module) subclass. Use it as a regular PyTorch Module and refer to the PyTorch documentation for all matter related to general usage and behavior. Parameters: config ([`BlipConfig`]): Model configuration class with all the parameters of the model. Initializing with a config file does not load the weights associated with the model, only the configuration. Check out the [`~PreTrainedModel.from_pretrained`] method to load the model weights. """ BLIP_TEXT_INPUTS_DOCSTRING = r""" Args: input_ids (`torch.LongTensor` of shape `(batch_size, sequence_length)`): Indices of input sequence tokens in the vocabulary. Padding will be ignored by default should you provide it. Indices can be obtained using [`AutoProcessor`]. See [`BlipProcessor.__call__`] for details. [What are input IDs?](../glossary#input-ids) attention_mask (`torch.Tensor` of shape `(batch_size, sequence_length)`, *optional*): Mask to avoid performing attention on padding token indices. Mask values selected in `[0, 1]`: - 1 for tokens that are **not masked**, - 0 for tokens that are **masked**. [What are attention masks?](../glossary#attention-mask) position_ids (`torch.LongTensor` of shape `(batch_size, sequence_length)`, *optional*): Indices of positions of each input sequence tokens in the position embeddings. Selected in the range `[0, config.max_position_embeddings - 1]`. [What are position IDs?](../glossary#position-ids) output_attentions (`bool`, *optional*): Whether or not to return the attentions tensors of all attention layers. See `attentions` under returned tensors for more detail. output_hidden_states (`bool`, *optional*): Whether or not to return the hidden states of all layers. See `hidden_states` under returned tensors for more detail. return_dict (`bool`, *optional*): Whether or not to return a [`~utils.ModelOutput`] instead of a plain tuple. """ BLIP_VISION_INPUTS_DOCSTRING = r""" Args: pixel_values (`torch.FloatTensor` of shape `(batch_size, num_channels, height, width)`): Pixel values. Padding will be ignored by default should you provide it. Pixel values can be obtained using [`BlipImageProcessor`]. See [`BlipImageProcessor.__call__`] for details. output_attentions (`bool`, *optional*): Whether or not to return the attentions tensors of all attention layers. See `attentions` under returned tensors for more detail. output_hidden_states (`bool`, *optional*): Whether or not to return the hidden states of all layers. See `hidden_states` under returned tensors for more detail. return_dict (`bool`, *optional*): Whether or not to return a [`~utils.ModelOutput`] instead of a plain tuple. """ BLIP_INPUTS_DOCSTRING = r""" Args: input_ids (`torch.LongTensor` of shape `(batch_size, sequence_length)`): Indices of input sequence tokens in the vocabulary. Padding will be ignored by default should you provide it. Indices can be obtained using [`AutoProcessor`]. See [`BlipProcessor.__call__`] for details. [What are input IDs?](../glossary#input-ids) attention_mask (`torch.Tensor` of shape `(batch_size, sequence_length)`, *optional*): Mask to avoid performing attention on padding token indices. Mask values selected in `[0, 1]`: - 1 for tokens that are **not masked**, - 0 for tokens that are **masked**. [What are attention masks?](../glossary#attention-mask) position_ids (`torch.LongTensor` of shape `(batch_size, sequence_length)`, *optional*): Indices of positions of each input sequence tokens in the position embeddings. Selected in the range `[0, config.max_position_embeddings - 1]`. [What are position IDs?](../glossary#position-ids) pixel_values (`torch.FloatTensor` of shape `(batch_size, num_channels, height, width)`): Pixel values. Padding will be ignored by default should you provide it. Pixel values can be obtained using [`BlipImageProcessor`]. See [`BlipImageProcessor.__call__`] for details. return_loss (`bool`, *optional*): Whether or not to return the contrastive loss. output_attentions (`bool`, *optional*): Whether or not to return the attentions tensors of all attention layers. See `attentions` under returned tensors for more detail. output_hidden_states (`bool`, *optional*): Whether or not to return the hidden states of all layers. See `hidden_states` under returned tensors for more detail. return_dict (`bool`, *optional*): Whether or not to return a [`~utils.ModelOutput`] instead of a plain tuple. """ class BlipEncoder(nn.Module): """ Transformer encoder consisting of `config.num_hidden_layers` self attention layers. Each layer is a [`BlipEncoderLayer`]. Args: config (`BlipConfig`): The corresponding vision configuration for the `BlipEncoder`. """ def __init__(self, config: BlipConfig): super().__init__() self.config = config self.layers = nn.ModuleList([BlipEncoderLayer(config) for _ in range(config.num_hidden_layers)]) self.gradient_checkpointing = False def forward( self, inputs_embeds, attention_mask: Optional[torch.Tensor] = None, output_attentions: Optional[bool] = None, output_hidden_states: Optional[bool] = None, return_dict: Optional[bool] = None, ) -> Union[Tuple, BaseModelOutput]: r""" Args: inputs_embeds (`torch.FloatTensor` of shape `(batch_size, sequence_length, hidden_size)`): Embedded representation of the inputs. Should be float, not int tokens. attention_mask (`torch.Tensor` of shape `(batch_size, sequence_length)`, *optional*): Mask to avoid performing attention on padding token indices. Mask values selected in `[0, 1]`: - 1 for tokens that are **not masked**, - 0 for tokens that are **masked**. [What are attention masks?](../glossary#attention-mask) output_attentions (`bool`, *optional*): Whether or not to return the attentions tensors of all attention layers. See `attentions` under returned tensors for more detail. output_hidden_states (`bool`, *optional*): Whether or not to return the hidden states of all layers. See `hidden_states` under returned tensors for more detail. return_dict (`bool`, *optional*): Whether or not to return a [`~utils.ModelOutput`] instead of a plain tuple. """ output_attentions = output_attentions if output_attentions is not None else self.config.output_attentions output_hidden_states = ( output_hidden_states if output_hidden_states is not None else self.config.output_hidden_states ) return_dict = return_dict if return_dict is not None else self.config.use_return_dict encoder_states = () if output_hidden_states else None all_attentions = () if output_attentions else None hidden_states = inputs_embeds for idx, encoder_layer in enumerate(self.layers): if output_hidden_states: encoder_states = encoder_states + (hidden_states,) if self.gradient_checkpointing and self.training: layer_outputs = self._gradient_checkpointing_func( encoder_layer.__call__, hidden_states, attention_mask, output_attentions, ) else: layer_outputs = encoder_layer( hidden_states, attention_mask, output_attentions=output_attentions, ) hidden_states = layer_outputs[0] if output_attentions: all_attentions = all_attentions + (layer_outputs[1],) if output_hidden_states: encoder_states = encoder_states + (hidden_states,) if not return_dict: return tuple(v for v in [hidden_states, encoder_states, all_attentions] if v is not None) return BaseModelOutput( last_hidden_state=hidden_states, hidden_states=encoder_states, attentions=all_attentions ) class BlipVisionModel(BlipPreTrainedModel): main_input_name = "pixel_values" config_class = BlipVisionConfig def __init__(self, config: BlipVisionConfig): super().__init__(config) self.config = config embed_dim = config.hidden_size self.embeddings = BlipVisionEmbeddings(config) self.encoder = BlipEncoder(config) self.post_layernorm = nn.LayerNorm(embed_dim, eps=config.layer_norm_eps) self.post_init() @add_start_docstrings_to_model_forward(BLIP_VISION_INPUTS_DOCSTRING) @replace_return_docstrings(output_type=BaseModelOutputWithPooling, config_class=BlipVisionConfig) def forward( self, pixel_values: Optional[torch.FloatTensor] = None, output_attentions: Optional[bool] = None, output_hidden_states: Optional[bool] = None, return_dict: Optional[bool] = None, ) -> Union[Tuple, BaseModelOutputWithPooling]: r""" Returns: """ output_attentions = output_attentions if output_attentions is not None else self.config.output_attentions output_hidden_states = ( output_hidden_states if output_hidden_states is not None else self.config.output_hidden_states ) return_dict = return_dict if return_dict is not None else self.config.use_return_dict if pixel_values is None: raise ValueError("You have to specify pixel_values") hidden_states = self.embeddings(pixel_values) encoder_outputs = self.encoder( inputs_embeds=hidden_states, output_attentions=output_attentions, output_hidden_states=output_hidden_states, return_dict=return_dict, ) last_hidden_state = encoder_outputs[0] last_hidden_state = self.post_layernorm(last_hidden_state) pooled_output = last_hidden_state[:, 0, :] pooled_output = self.post_layernorm(pooled_output) if not return_dict: return (last_hidden_state, pooled_output) + encoder_outputs[1:] return BaseModelOutputWithPooling( last_hidden_state=last_hidden_state, pooler_output=pooled_output, hidden_states=encoder_outputs.hidden_states, attentions=encoder_outputs.attentions, ) def get_input_embeddings(self): return self.embeddings @add_start_docstrings(BLIP_START_DOCSTRING) class BlipModel(BlipPreTrainedModel): config_class = BlipConfig def __init__(self, config: BlipConfig): super().__init__(config) if not isinstance(config.text_config, BlipTextConfig): raise ValueError( "config.text_config is expected to be of type BlipTextConfig but is of type" f" {type(config.text_config)}." ) if not isinstance(config.vision_config, BlipVisionConfig): raise ValueError( "config.vision_config is expected to be of type BlipVisionConfig but is of type" f" {type(config.vision_config)}." ) text_config = config.text_config vision_config = config.vision_config self.projection_dim = config.projection_dim self.text_embed_dim = text_config.hidden_size self.vision_embed_dim = vision_config.hidden_size self.text_model = BlipTextModel(text_config) self.vision_model = BlipVisionModel(vision_config) self.visual_projection = nn.Linear(self.vision_embed_dim, self.projection_dim, bias=False) self.text_projection = nn.Linear(self.text_embed_dim, self.projection_dim, bias=False) self.logit_scale = nn.Parameter(torch.tensor(self.config.logit_scale_init_value)) # Initialize weights and apply final processing self.post_init() @add_start_docstrings_to_model_forward(BLIP_TEXT_INPUTS_DOCSTRING) def get_text_features( self, input_ids: Optional[torch.Tensor] = None, attention_mask: Optional[torch.Tensor] = None, position_ids: Optional[torch.Tensor] = None, return_dict: Optional[bool] = None, ) -> torch.FloatTensor: r""" Returns: text_features (`torch.FloatTensor` of shape `(batch_size, output_dim`): The text embeddings obtained by applying the projection layer to the pooled output of [`BlipTextModel`]. Examples: ```python >>> from transformers import AutoProcessor, BlipModel >>> model = BlipModel.from_pretrained("Salesforce/blip-image-captioning-base") >>> processor = AutoProcessor.from_pretrained("Salesforce/blip-image-captioning-base") >>> inputs = processor(text=["a photo of a cat", "a photo of a dog"], padding=True, return_tensors="pt") >>> text_features = model.get_text_features(**inputs) ```""" return_dict = return_dict if return_dict is not None else self.config.use_return_dict text_outputs = self.text_model( input_ids=input_ids, attention_mask=attention_mask, position_ids=position_ids, return_dict=return_dict, ) pooled_output = text_outputs[1] text_features = self.text_projection(pooled_output) return text_features @add_start_docstrings_to_model_forward(BLIP_VISION_INPUTS_DOCSTRING) def get_image_features( self, pixel_values: Optional[torch.FloatTensor] = None, return_dict: Optional[bool] = None, ) -> torch.FloatTensor: r""" Returns: image_features (`torch.FloatTensor` of shape `(batch_size, output_dim`): The image embeddings obtained by applying the projection layer to the pooled output of [`BlipVisionModel`]. Examples: ```python >>> from PIL import Image >>> import requests >>> from transformers import AutoProcessor, BlipModel >>> model = BlipModel.from_pretrained("Salesforce/blip-image-captioning-base") >>> processor = AutoProcessor.from_pretrained("Salesforce/blip-image-captioning-base") >>> url = "http://images.cocodataset.org/val2017/000000039769.jpg" >>> image = Image.open(requests.get(url, stream=True).raw) >>> inputs = processor(images=image, return_tensors="pt") >>> image_features = model.get_image_features(**inputs) ```""" return_dict = return_dict if return_dict is not None else self.config.use_return_dict vision_outputs = self.vision_model(pixel_values=pixel_values, return_dict=return_dict) pooled_output = vision_outputs[1] # pooled_output image_features = self.visual_projection(pooled_output) return image_features @add_start_docstrings_to_model_forward(BLIP_INPUTS_DOCSTRING) @replace_return_docstrings(output_type=BlipOutput, config_class=BlipConfig) def forward( self, input_ids: Optional[torch.LongTensor] = None, pixel_values: Optional[torch.FloatTensor] = None, attention_mask: Optional[torch.Tensor] = None, position_ids: Optional[torch.LongTensor] = None, return_loss: Optional[bool] = None, output_attentions: Optional[bool] = None, output_hidden_states: Optional[bool] = None, return_dict: Optional[bool] = None, ) -> Union[Tuple, BlipOutput]: r""" Returns: Examples: ```python >>> from PIL import Image >>> import requests >>> from transformers import AutoProcessor, BlipModel >>> model = BlipModel.from_pretrained("Salesforce/blip-image-captioning-base") >>> processor = AutoProcessor.from_pretrained("Salesforce/blip-image-captioning-base") >>> url = "http://images.cocodataset.org/val2017/000000039769.jpg" >>> image = Image.open(requests.get(url, stream=True).raw) >>> inputs = processor( ... text=["a photo of a cat", "a photo of a dog"], images=image, return_tensors="pt", padding=True ... ) >>> outputs = model(**inputs) >>> logits_per_image = outputs.logits_per_image # this is the image-text similarity score >>> probs = logits_per_image.softmax(dim=1) # we can take the softmax to get the label probabilities ```""" # Use BLIP model's config for some fields (if specified) instead of those of vision & text components. output_attentions = output_attentions if output_attentions is not None else self.config.output_attentions output_hidden_states = ( output_hidden_states if output_hidden_states is not None else self.config.output_hidden_states ) return_dict = return_dict if return_dict is not None else self.config.use_return_dict vision_outputs = self.vision_model( pixel_values=pixel_values, output_attentions=output_attentions, output_hidden_states=output_hidden_states, return_dict=return_dict, ) text_outputs = self.text_model( input_ids=input_ids, attention_mask=attention_mask, position_ids=position_ids, output_attentions=output_attentions, output_hidden_states=output_hidden_states, return_dict=return_dict, ) image_embeds = vision_outputs[1] image_embeds = self.visual_projection(image_embeds) text_embeds = text_outputs[1] text_embeds = self.text_projection(text_embeds) # normalized features image_embeds = image_embeds / image_embeds.norm(p=2, dim=-1, keepdim=True) text_embeds = text_embeds / text_embeds.norm(p=2, dim=-1, keepdim=True) # cosine similarity as logits logit_scale = self.logit_scale.exp() logits_per_text = torch.matmul(text_embeds, image_embeds.t()) * logit_scale logits_per_image = logits_per_text.t() loss = None if return_loss: loss = blip_loss(logits_per_text) if not return_dict: output = (logits_per_image, logits_per_text, text_embeds, image_embeds, text_outputs, vision_outputs) return ((loss,) + output) if loss is not None else output return BlipOutput( loss=loss, logits_per_image=logits_per_image, logits_per_text=logits_per_text, text_embeds=text_embeds, image_embeds=image_embeds, text_model_output=text_outputs, vision_model_output=vision_outputs, ) @add_start_docstrings( """ BLIP Model for image captioning. The model consists of a vision encoder and a text decoder. One can optionally pass `input_ids` to the model, which serve as a text prompt, to make the text decoder continue the prompt. Otherwise, the decoder starts generating text from the [BOS] (beginning-of-sequence) token. will start generating the caption from the text input. If no text input is provided, the decoder will start with the [BOS] token only. """, BLIP_START_DOCSTRING, ) class BlipForConditionalGeneration(BlipPreTrainedModel): config_class = BlipConfig _tied_weights_keys = ["text_decoder.cls.predictions.decoder.bias"] main_input_name = "pixel_values" def __init__(self, config: BlipConfig): super().__init__(config) self.vision_model = BlipVisionModel(config.vision_config) self.text_decoder = BlipTextLMHeadModel(config.text_config) self.decoder_input_ids = config.text_config.bos_token_id self.decoder_pad_token_id = config.text_config.pad_token_id # Initialize weights and apply final processing self.post_init() def get_input_embeddings(self) -> nn.Module: return self.vision_model.embeddings.patch_embedding @add_start_docstrings_to_model_forward(BLIP_VISION_INPUTS_DOCSTRING) @replace_return_docstrings(output_type=BlipForConditionalGenerationModelOutput, config_class=BlipVisionConfig) def forward( self, pixel_values: torch.FloatTensor, input_ids: Optional[torch.LongTensor] = None, attention_mask: Optional[torch.LongTensor] = None, output_attentions: Optional[bool] = None, output_hidden_states: Optional[bool] = None, labels: Optional[torch.LongTensor] = None, return_dict: Optional[bool] = None, ) -> Union[Tuple, BlipForConditionalGenerationModelOutput]: r""" Returns: Examples: ```python >>> from PIL import Image >>> import requests >>> from transformers import AutoProcessor, BlipForConditionalGeneration >>> processor = AutoProcessor.from_pretrained("Salesforce/blip-image-captioning-base") >>> model = BlipForConditionalGeneration.from_pretrained("Salesforce/blip-image-captioning-base") >>> url = "http://images.cocodataset.org/val2017/000000039769.jpg" >>> image = Image.open(requests.get(url, stream=True).raw) >>> text = "A picture of" >>> inputs = processor(images=image, text=text, return_tensors="pt") >>> outputs = model(**inputs) ```""" return_dict = return_dict if return_dict is not None else self.config.use_return_dict output_attentions = output_attentions if output_attentions is not None else self.config.output_attentions output_hidden_states = ( output_hidden_states if output_hidden_states is not None else self.config.output_hidden_states ) vision_outputs = self.vision_model( pixel_values=pixel_values, output_attentions=output_attentions, output_hidden_states=output_hidden_states, return_dict=return_dict, ) image_embeds = vision_outputs[0] outputs = self.text_decoder( input_ids=input_ids, attention_mask=attention_mask, encoder_hidden_states=image_embeds, labels=labels, return_dict=return_dict, reduction="mean", ) if not return_dict: outputs = (outputs[0], outputs[1], image_embeds, vision_outputs[0]) + vision_outputs[2:] return tuple(output for output in outputs if output is not None) return BlipForConditionalGenerationModelOutput( loss=outputs.loss, logits=outputs.logits, image_embeds=image_embeds, last_hidden_state=vision_outputs.last_hidden_state, hidden_states=vision_outputs.hidden_states, attentions=vision_outputs.attentions, ) @torch.no_grad() def generate( self, pixel_values: torch.FloatTensor, input_ids: Optional[torch.LongTensor] = None, attention_mask: Optional[torch.LongTensor] = None, **generate_kwargs, ) -> torch.LongTensor: r""" Overrides *generate* function to be able to use the model as a conditional generator Parameters: pixel_values (*torch.FloatTensor* of shape *(batch_size, num_channels, image_height, image_width)*: Input image to be processed input_ids (*torch.LongTensor* of shape *(batch_size, sequence_length)*, *optional*): The sequence used as a prompt for the generation. attention_mask (*torch.LongTensor* of shape *(batch_size, sequence_length)*, *optional*): Mask to avoid performing attention on padding token indices. Mask values selected in `[0, 1]`: Examples: ```python >>> from PIL import Image >>> import requests >>> from transformers import AutoProcessor, BlipForConditionalGeneration >>> model = BlipForConditionalGeneration.from_pretrained("Salesforce/blip-image-captioning-base") >>> processor = AutoProcessor.from_pretrained("Salesforce/blip-image-captioning-base") >>> url = "http://images.cocodataset.org/val2017/000000039769.jpg" >>> image = Image.open(requests.get(url, stream=True).raw) >>> inputs = processor(images=image, return_tensors="pt") >>> outputs = model.generate(**inputs) >>> print(processor.decode(outputs[0], skip_special_tokens=True)) two cats sleeping on a couch ``` """ batch_size = pixel_values.shape[0] vision_outputs = self.vision_model(pixel_values=pixel_values) image_embeds = vision_outputs[0] image_attention_mask = torch.ones(image_embeds.size()[:-1], dtype=torch.long).to(image_embeds.device) if isinstance(input_ids, list): input_ids = torch.LongTensor(input_ids) elif input_ids is None: input_ids = ( torch.LongTensor([[self.decoder_input_ids, self.config.text_config.eos_token_id]]) .repeat(batch_size, 1) .to(image_embeds.device) ) input_ids[:, 0] = self.config.text_config.bos_token_id attention_mask = attention_mask[:, :-1] if attention_mask is not None else None outputs = self.text_decoder.generate( input_ids=input_ids[:, :-1], eos_token_id=self.config.text_config.sep_token_id, pad_token_id=self.config.text_config.pad_token_id, attention_mask=attention_mask, encoder_hidden_states=image_embeds, encoder_attention_mask=image_attention_mask, **generate_kwargs, ) return outputs @add_start_docstrings( """ BLIP Model for visual question answering. The model consists of a vision encoder, a text encoder as well as a text decoder. The vision encoder will encode the input image, the text encoder will encode the input question together with the encoding of the image, and the text decoder will output the answer to the question. """, BLIP_START_DOCSTRING, ) class BlipForQuestionAnswering(BlipPreTrainedModel): config_class = BlipConfig _tied_weights_keys = ["text_decoder.cls.predictions.decoder.bias"] def __init__(self, config: BlipConfig): super().__init__(config) self.vision_model = BlipVisionModel(config.vision_config) self.text_encoder = BlipTextModel(config.text_config, add_pooling_layer=False) self.text_decoder = BlipTextLMHeadModel(config.text_config) self.decoder_pad_token_id = config.text_config.pad_token_id self.decoder_start_token_id = config.text_config.bos_token_id # Initialize weights and apply final processing self.post_init() def get_input_embeddings(self) -> nn.Module: return self.vision_model.embeddings.patch_embedding @add_start_docstrings_to_model_forward(BLIP_VISION_INPUTS_DOCSTRING) @replace_return_docstrings(output_type=BlipTextVisionModelOutput, config_class=BlipVisionConfig) def forward( self, input_ids: torch.LongTensor, pixel_values: torch.FloatTensor, decoder_input_ids: Optional[torch.LongTensor] = None, decoder_attention_mask: Optional[torch.LongTensor] = None, attention_mask: Optional[torch.LongTensor] = None, output_attentions: Optional[bool] = None, output_hidden_states: Optional[bool] = None, labels: Optional[torch.LongTensor] = None, return_dict: Optional[bool] = None, ) -> Union[Tuple, BlipTextVisionModelOutput]: r""" Returns: Examples: ```python >>> from PIL import Image >>> import requests >>> from transformers import AutoProcessor, BlipForQuestionAnswering >>> model = BlipForQuestionAnswering.from_pretrained("Salesforce/blip-vqa-base") >>> processor = AutoProcessor.from_pretrained("Salesforce/blip-vqa-base") >>> url = "http://images.cocodataset.org/val2017/000000039769.jpg" >>> image = Image.open(requests.get(url, stream=True).raw) >>> # training >>> text = "How many cats are in the picture?" >>> label = "2" >>> inputs = processor(images=image, text=text, return_tensors="pt") >>> labels = processor(text=label, return_tensors="pt").input_ids >>> inputs["labels"] = labels >>> outputs = model(**inputs) >>> loss = outputs.loss >>> loss.backward() >>> # inference >>> text = "How many cats are in the picture?" >>> inputs = processor(images=image, text=text, return_tensors="pt") >>> outputs = model.generate(**inputs) >>> print(processor.decode(outputs[0], skip_special_tokens=True)) 2 ```""" if labels is None and decoder_input_ids is None: raise ValueError( "Either `decoder_input_ids` or `labels` should be passed when calling `forward` with" " `BlipForQuestionAnswering`. if you are training the model make sure that `labels` is passed, if you" " are using the model for inference make sure that `decoder_input_ids` is passed or call `generate`" ) return_dict = return_dict if return_dict is not None else self.config.use_return_dict output_attentions = output_attentions if output_attentions is not None else self.config.output_attentions output_hidden_states = ( output_hidden_states if output_hidden_states is not None else self.config.output_hidden_states ) vision_outputs = self.vision_model( pixel_values=pixel_values, output_attentions=output_attentions, output_hidden_states=output_hidden_states, return_dict=return_dict, ) image_embeds = vision_outputs[0] image_attention_mask = torch.ones(image_embeds.size()[:-1], dtype=torch.long) question_embeds = self.text_encoder( input_ids=input_ids, attention_mask=attention_mask, encoder_hidden_states=image_embeds, encoder_attention_mask=image_attention_mask, return_dict=return_dict, ) if labels is not None and decoder_input_ids is None: # labels are already shifted right, see: https://github.com/huggingface/transformers/pull/23153 decoder_input_ids = labels question_embeds = question_embeds[0] if not return_dict else question_embeds.last_hidden_state answer_output = self.text_decoder( input_ids=decoder_input_ids, attention_mask=decoder_attention_mask, encoder_hidden_states=question_embeds, encoder_attention_mask=attention_mask, labels=labels, return_dict=return_dict, reduction="mean", ) if labels is not None: decoder_loss = answer_output.loss.mean() if return_dict else answer_output[0].mean() else: decoder_loss = None if not return_dict: outputs = (decoder_loss, image_embeds, vision_outputs[0]) + vision_outputs[2:] return tuple(output for output in outputs if output is not None) return BlipTextVisionModelOutput( loss=decoder_loss, image_embeds=image_embeds, last_hidden_state=vision_outputs.last_hidden_state, hidden_states=vision_outputs.hidden_states, attentions=vision_outputs.attentions, ) @torch.no_grad() def generate( self, input_ids: torch.LongTensor, pixel_values: torch.FloatTensor, attention_mask: Optional[torch.LongTensor] = None, **generate_kwargs, ) -> torch.LongTensor: r""" Overrides *generate* function to be able to use the model as a conditional generator Parameters: input_ids (*torch.LongTensor* of shape *(batch_size, sequence_length)*): The sequence used as a prompt for the generation. pixel_values (*torch.FloatTensor* of shape *(batch_size, num_channels, image_height, image_width)*: Input image to be processed attention_mask (*torch.LongTensor* of shape *(batch_size, sequence_length)*, *optional*): Mask to avoid performing attention on padding token indices. Mask values selected in `[0, 1]`. `1` for tokens that are NOT MASKED, `0` for MASKED tokens. **generate_kwargs: Additional arguments passed to the *generate* function of the decoder Examples: ```python >>> from PIL import Image >>> import requests >>> from transformers import AutoProcessor, BlipForQuestionAnswering >>> model = BlipForQuestionAnswering.from_pretrained("Salesforce/blip-vqa-base") >>> processor = AutoProcessor.from_pretrained("Salesforce/blip-vqa-base") >>> url = "http://images.cocodataset.org/val2017/000000039769.jpg" >>> image = Image.open(requests.get(url, stream=True).raw) >>> text = "How many cats are in the picture?" >>> inputs = processor(images=image, text=text, return_tensors="pt") >>> outputs = model.generate(**inputs) >>> print(processor.decode(outputs[0], skip_special_tokens=True)) 2 ``` """ vision_outputs = self.vision_model(pixel_values=pixel_values) image_embeds = vision_outputs[0] image_attention_mask = torch.ones(image_embeds.size()[:-1], dtype=torch.long).to(image_embeds.device) if isinstance(input_ids, list): input_ids = torch.LongTensor(input_ids) question_outputs = self.text_encoder( input_ids=input_ids, attention_mask=attention_mask, encoder_hidden_states=image_embeds, encoder_attention_mask=image_attention_mask, return_dict=False, ) question_embeds = question_outputs[0] question_attention_mask = torch.ones(question_embeds.size()[:-1], dtype=torch.long).to(question_embeds.device) bos_ids = torch.full( (question_embeds.size(0), 1), fill_value=self.decoder_start_token_id, device=question_embeds.device ) outputs = self.text_decoder.generate( input_ids=bos_ids, eos_token_id=self.config.text_config.sep_token_id, pad_token_id=self.config.text_config.pad_token_id, encoder_hidden_states=question_embeds, encoder_attention_mask=question_attention_mask, **generate_kwargs, ) return outputs @add_start_docstrings( """ BLIP Model with a vision and text projector, and a classification head on top. The model is used in the context of image-text retrieval. Given an image and a text, the model returns the probability of the text being relevant to the image. """, BLIP_START_DOCSTRING, ) class BlipForImageTextRetrieval(BlipPreTrainedModel): config_class = BlipConfig def __init__(self, config: BlipConfig): super().__init__(config) self.vision_model = BlipVisionModel(config.vision_config) self.text_encoder = BlipTextModel(config.text_config, add_pooling_layer=False) # vision projection layer self.vision_proj = nn.Linear(config.vision_config.hidden_size, config.image_text_hidden_size) # text projection layer self.text_proj = nn.Linear(config.text_config.hidden_size, config.image_text_hidden_size) # image text matching head self.itm_head = nn.Linear(config.text_config.hidden_size, 2) self.decoder_pad_token_id = ( config.text_config.pad_token_id if not hasattr(config, "decoder_pad_token_id") else config.decoder_pad_token_id ) self.decoder_start_token_id = ( config.text_config.bos_token_id if not hasattr(config, "decoder_start_token_id") else config.decoder_start_token_id ) # Initialize weights and apply final processing self.post_init() def get_input_embeddings(self) -> nn.Module: return self.vision_model.embeddings.patch_embedding @add_start_docstrings_to_model_forward(BLIP_VISION_INPUTS_DOCSTRING) @replace_return_docstrings(output_type=BlipTextVisionModelOutput, config_class=BlipVisionConfig) def forward( self, input_ids: torch.LongTensor, pixel_values: torch.FloatTensor, use_itm_head: Optional[bool] = True, attention_mask: Optional[torch.LongTensor] = None, output_attentions: Optional[bool] = None, output_hidden_states: Optional[bool] = None, return_dict: Optional[bool] = None, ) -> Union[Tuple, BlipTextVisionModelOutput]: r""" Returns: Examples: ```python >>> from PIL import Image >>> import requests >>> from transformers import AutoProcessor, BlipForImageTextRetrieval >>> model = BlipForImageTextRetrieval.from_pretrained("Salesforce/blip-itm-base-coco") >>> processor = AutoProcessor.from_pretrained("Salesforce/blip-itm-base-coco") >>> url = "http://images.cocodataset.org/val2017/000000039769.jpg" >>> image = Image.open(requests.get(url, stream=True).raw) >>> text = "an image of a cat" >>> inputs = processor(images=image, text=text, return_tensors="pt") >>> outputs = model(**inputs) ``` """ return_dict = return_dict if return_dict is not None else self.config.use_return_dict output_attentions = output_attentions if output_attentions is not None else self.config.output_attentions output_hidden_states = ( output_hidden_states if output_hidden_states is not None else self.config.output_hidden_states ) vision_outputs = self.vision_model( pixel_values=pixel_values, output_attentions=output_attentions, output_hidden_states=output_hidden_states, return_dict=return_dict, ) image_embeds = vision_outputs[0] image_atts = torch.ones(image_embeds.size()[:-1], dtype=torch.long) if use_itm_head: question_embeds = self.text_encoder( input_ids=input_ids, attention_mask=attention_mask, encoder_hidden_states=image_embeds, encoder_attention_mask=image_atts, return_dict=return_dict, ) question_embeds = question_embeds[0] if not return_dict else question_embeds.last_hidden_state output = self.itm_head(question_embeds[:, 0, :]) else: question_embeds = self.text_encoder( input_ids=input_ids, attention_mask=attention_mask, return_dict=return_dict, ) question_embeds = question_embeds[0] if not return_dict else question_embeds.last_hidden_state image_feat = normalize(self.vision_proj(image_embeds[:, 0, :]), dim=-1) text_feat = normalize(self.text_proj(question_embeds[:, 0, :]), dim=-1) output = image_feat @ text_feat.t() if not return_dict: outputs = (output, vision_outputs[0]) + vision_outputs[2:] + (question_embeds,) return tuple(output for output in outputs if output is not None) return BlipImageTextMatchingModelOutput( itm_score=output, last_hidden_state=vision_outputs.last_hidden_state, hidden_states=vision_outputs.hidden_states, attentions=vision_outputs.attentions, question_embeds=question_embeds, )

transformers/src/transformers/models/blip/modeling_blip.py/0

{ "file_path": "transformers/src/transformers/models/blip/modeling_blip.py", "repo_id": "transformers", "token_count": 25453 }

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# Copyright 2023 The Intel Labs Team Authors, The Microsoft Research Team Authors and HuggingFace Inc. team. All rights reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. from typing import TYPE_CHECKING from ...utils import OptionalDependencyNotAvailable, _LazyModule, is_torch_available, is_vision_available _import_structure = { "configuration_bridgetower": [ "BRIDGETOWER_PRETRAINED_CONFIG_ARCHIVE_MAP", "BridgeTowerConfig", "BridgeTowerTextConfig", "BridgeTowerVisionConfig", ], "processing_bridgetower": ["BridgeTowerProcessor"], } try: if not is_vision_available(): raise OptionalDependencyNotAvailable() except OptionalDependencyNotAvailable: pass else: _import_structure["image_processing_bridgetower"] = ["BridgeTowerImageProcessor"] try: if not is_torch_available(): raise OptionalDependencyNotAvailable() except OptionalDependencyNotAvailable: pass else: _import_structure["modeling_bridgetower"] = [ "BRIDGETOWER_PRETRAINED_MODEL_ARCHIVE_LIST", "BridgeTowerForContrastiveLearning", "BridgeTowerForImageAndTextRetrieval", "BridgeTowerForMaskedLM", "BridgeTowerModel", "BridgeTowerPreTrainedModel", ] if TYPE_CHECKING: from .configuration_bridgetower import ( BRIDGETOWER_PRETRAINED_CONFIG_ARCHIVE_MAP, BridgeTowerConfig, BridgeTowerTextConfig, BridgeTowerVisionConfig, ) from .processing_bridgetower import BridgeTowerProcessor try: if not is_vision_available(): raise OptionalDependencyNotAvailable() except OptionalDependencyNotAvailable: pass else: from .image_processing_bridgetower import BridgeTowerImageProcessor try: if not is_torch_available(): raise OptionalDependencyNotAvailable() except OptionalDependencyNotAvailable: pass else: from .modeling_bridgetower import ( BRIDGETOWER_PRETRAINED_MODEL_ARCHIVE_LIST, BridgeTowerForContrastiveLearning, BridgeTowerForImageAndTextRetrieval, BridgeTowerForMaskedLM, BridgeTowerModel, BridgeTowerPreTrainedModel, ) else: import sys sys.modules[__name__] = _LazyModule(__name__, globals()["__file__"], _import_structure)

transformers/src/transformers/models/bridgetower/__init__.py/0

{ "file_path": "transformers/src/transformers/models/bridgetower/__init__.py", "repo_id": "transformers", "token_count": 1071 }

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# coding=utf-8 # Copyright 2023 The HuggingFace Inc. team. All rights reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. """ CLAP model configuration""" import os from typing import Union from ...configuration_utils import PretrainedConfig from ...utils import logging logger = logging.get_logger(__name__) CLAP_PRETRAINED_MODEL_ARCHIVE_LIST = { "laion/clap-htsat-fused": "https://huggingface.co/laion/clap-htsat-fused/resolve/main/config.json", "laion/clap-htsat-unfused": "https://huggingface.co/laion/clap-htsat-unfused/resolve/main/config.json", } class ClapTextConfig(PretrainedConfig): r""" This is the configuration class to store the configuration of a [`ClapTextModel`]. It is used to instantiate a CLAP model according to the specified arguments, defining the model architecture. Instantiating a configuration with the defaults will yield a similar configuration to that of the CLAP [calp-hsat-fused](https://huggingface.co/laion/clap-hsat-fused) architecture. Configuration objects inherit from [`PretrainedConfig`] and can be used to control the model outputs. Read the documentation from [`PretrainedConfig`] for more information. Args: vocab_size (`int`, *optional*, defaults to 30522): Vocabulary size of the CLAP model. Defines the number of different tokens that can be represented by the `inputs_ids` passed when calling [`ClapTextModel`]. hidden_size (`int`, *optional*, defaults to 768): Dimensionality of the encoder layers and the pooler layer. num_hidden_layers (`int`, *optional*, defaults to 12): Number of hidden layers in the Transformer encoder. num_attention_heads (`int`, *optional*, defaults to 12): Number of attention heads for each attention layer in the Transformer encoder. intermediate_size (`int`, *optional*, defaults to 3072): Dimensionality of the "intermediate" (often named feed-forward) layer in the Transformer encoder. hidden_act (`str` or `Callable`, *optional*, defaults to `"relu"`): The non-linear activation function (function or string) in the encoder and pooler. If string, `"relu"`, `"relu"`, `"silu"` and `"relu_new"` are supported. hidden_dropout_prob (`float`, *optional*, defaults to 0.1): The dropout probability for all fully connected layers in the embeddings, encoder, and pooler. attention_probs_dropout_prob (`float`, *optional*, defaults to 0.1): The dropout ratio for the attention probabilities. max_position_embeddings (`int`, *optional*, defaults to 512): The maximum sequence length that this model might ever be used with. Typically set this to something large just in case (e.g., 512 or 1024 or 2048). type_vocab_size (`int`, *optional*, defaults to 2): The vocabulary size of the `token_type_ids` passed when calling [`ClapTextModel`]. layer_norm_eps (`float`, *optional*, defaults to 1e-12): The epsilon used by the layer normalization layers. position_embedding_type (`str`, *optional*, defaults to `"absolute"`): Type of position embedding. Choose one of `"absolute"`, `"relative_key"`, `"relative_key_query"`. For positional embeddings use `"absolute"`. For more information on `"relative_key"`, please refer to [Self-Attention with Relative Position Representations (Shaw et al.)](https://arxiv.org/abs/1803.02155). For more information on `"relative_key_query"`, please refer to *Method 4* in [Improve Transformer Models with Better Relative Position Embeddings (Huang et al.)](https://arxiv.org/abs/2009.13658). is_decoder (`bool`, *optional*, defaults to `False`): Whether the model is used as a decoder or not. If `False`, the model is used as an encoder. use_cache (`bool`, *optional*, defaults to `True`): Whether or not the model should return the last key/values attentions (not used by all models). Only relevant if `config.is_decoder=True`. projection_hidden_act (`str`, *optional*, defaults to `"relu"`): The non-linear activation function (function or string) in the projection layer. If string, `"gelu"`, `"relu"`, `"silu"` and `"gelu_new"` are supported. projection_dim (`int`, *optional*, defaults to 512) Dimension of the projection head of the `ClapTextModelWithProjection`. Examples: ```python >>> from transformers import ClapTextConfig, ClapTextModel >>> # Initializing a CLAP text configuration >>> configuration = ClapTextConfig() >>> # Initializing a model (with random weights) from the configuration >>> model = ClapTextModel(configuration) >>> # Accessing the model configuration >>> configuration = model.config ```""" model_type = "clap_text_model" def __init__( self, vocab_size=50265, hidden_size=768, num_hidden_layers=12, num_attention_heads=12, intermediate_size=3072, hidden_act="gelu", hidden_dropout_prob=0.1, attention_probs_dropout_prob=0.1, max_position_embeddings=514, type_vocab_size=1, initializer_factor=1.0, layer_norm_eps=1e-12, projection_dim=512, pad_token_id=1, bos_token_id=0, eos_token_id=2, position_embedding_type="absolute", use_cache=True, projection_hidden_act="relu", **kwargs, ): super().__init__(pad_token_id=pad_token_id, bos_token_id=bos_token_id, eos_token_id=eos_token_id, **kwargs) self.vocab_size = vocab_size self.hidden_size = hidden_size self.num_hidden_layers = num_hidden_layers self.num_attention_heads = num_attention_heads self.hidden_act = hidden_act self.intermediate_size = intermediate_size self.hidden_dropout_prob = hidden_dropout_prob self.attention_probs_dropout_prob = attention_probs_dropout_prob self.max_position_embeddings = max_position_embeddings self.type_vocab_size = type_vocab_size self.initializer_factor = initializer_factor self.layer_norm_eps = layer_norm_eps self.position_embedding_type = position_embedding_type self.use_cache = use_cache self.projection_hidden_act = projection_hidden_act self.projection_dim = projection_dim @classmethod def from_pretrained(cls, pretrained_model_name_or_path: Union[str, os.PathLike], **kwargs) -> "PretrainedConfig": cls._set_token_in_kwargs(kwargs) config_dict, kwargs = cls.get_config_dict(pretrained_model_name_or_path, **kwargs) # get the text config dict if we are loading from ClapConfig if config_dict.get("model_type") == "clap": config_dict = config_dict["text_config"] if "model_type" in config_dict and hasattr(cls, "model_type") and config_dict["model_type"] != cls.model_type: logger.warning( f"You are using a model of type {config_dict['model_type']} to instantiate a model of type " f"{cls.model_type}. This is not supported for all configurations of models and can yield errors." ) return cls.from_dict(config_dict, **kwargs) class ClapAudioConfig(PretrainedConfig): r""" This is the configuration class to store the configuration of a [`ClapAudioModel`]. It is used to instantiate a CLAP audio encoder according to the specified arguments, defining the model architecture. Instantiating a configuration with the defaults will yield a similar configuration to that of the audio encoder of the CLAP [laion/clap-htsat-fused](https://huggingface.co/laion/clap-htsat-fused) architecture. Configuration objects inherit from [`PretrainedConfig`] and can be used to control the model outputs. Read the documentation from [`PretrainedConfig`] for more information. Args: window_size (`int`, *optional*, defaults to 8): Image size of the spectrogram num_mel_bins (`int`, *optional*, defaults to 64): Number of mel features used per frames. Should correspond to the value used in the `ClapProcessor` class. spec_size (`int`, *optional*, defaults to 256): Desired input size of the spectrogram that the model supports. It can be different from the output of the `ClapFeatureExtractor`, in which case the input features will be resized. Corresponds to the `image_size` of the audio models. hidden_act (`str`, *optional*, defaults to `"gelu"`): The non-linear activation function (function or string) in the encoder and pooler. If string, `"gelu"`, `"relu"`, `"silu"` and `"gelu_new"` are supported. patch_size (`int`, *optional*, defaults to 4): Patch size for the audio spectrogram patch_stride (`list`, *optional*, defaults to `[4, 4]`): Patch stride for the audio spectrogram num_classes (`int`, *optional*, defaults to 527): Number of classes used for the head training hidden_size (`int`, *optional*, defaults to 768): Hidden size of the output of the audio encoder. Correspond to the dimension of the penultimate layer's output,which is sent to the projection MLP layer. projection_dim (`int`, *optional*, defaults to 512): Hidden size of the projection layer. depths (`list`, *optional*, defaults to `[2, 2, 6, 2]`): Depths used for the Swin Layers of the audio model num_attention_heads (`list`, *optional*, defaults to `[4, 8, 16, 32]`): Number of attention heads used for the Swin Layers of the audio model enable_fusion (`bool`, *optional*, defaults to `False`): Whether or not to enable patch fusion. This is the main contribution of the authors, and should give the best results. hidden_dropout_prob (`float`, *optional*, defaults to 0.1): The dropout probability for all fully connected layers in the encoder. fusion_type (`[type]`, *optional*): Fusion type used for the patch fusion. patch_embed_input_channels (`int`, *optional*, defaults to 1): Number of channels used for the input spectrogram flatten_patch_embeds (`bool`, *optional*, defaults to `True`): Whether or not to flatten the patch embeddings patch_embeds_hidden_size (`int`, *optional*, defaults to 96): Hidden size of the patch embeddings. It is used as the number of output channels. enable_patch_layer_norm (`bool`, *optional*, defaults to `True`): Whether or not to enable layer normalization for the patch embeddings drop_path_rate (`float`, *optional*, defaults to 0.0): Drop path rate for the patch fusion attention_probs_dropout_prob (`float`, *optional*, defaults to 0.0): The dropout ratio for the attention probabilities. qkv_bias (`bool`, *optional*, defaults to `True`): Whether or not to add a bias to the query, key, value projections. mlp_ratio (`float`, *optional*, defaults to 4.0): Ratio of the mlp hidden dim to embedding dim. aff_block_r (`int`, *optional*, defaults to 4): downsize_ratio used in the AudioFF block num_hidden_layers (`int`, *optional*, defaults to 4): Number of hidden layers in the Transformer encoder. projection_hidden_act (`str`, *optional*, defaults to `"relu"`): The non-linear activation function (function or string) in the projection layer. If string, `"gelu"`, `"relu"`, `"silu"` and `"gelu_new"` are supported. layer_norm_eps (`[type]`, *optional*, defaults to 1e-05): The epsilon used by the layer normalization layers. initializer_factor (`float`, *optional*, defaults to 1.0): A factor for initializing all weight matrices (should be kept to 1, used internally for initialization testing). Example: ```python >>> from transformers import ClapAudioConfig, ClapAudioModel >>> # Initializing a ClapAudioConfig with laion/clap-htsat-fused style configuration >>> configuration = ClapAudioConfig() >>> # Initializing a ClapAudioModel (with random weights) from the laion/clap-htsat-fused style configuration >>> model = ClapAudioModel(configuration) >>> # Accessing the model configuration >>> configuration = model.config ```""" model_type = "clap_audio_model" def __init__( self, window_size=8, num_mel_bins=64, spec_size=256, hidden_act="gelu", patch_size=4, patch_stride=[4, 4], num_classes=527, hidden_size=768, projection_dim=512, depths=[2, 2, 6, 2], num_attention_heads=[4, 8, 16, 32], enable_fusion=False, hidden_dropout_prob=0.1, fusion_type=None, patch_embed_input_channels=1, flatten_patch_embeds=True, patch_embeds_hidden_size=96, enable_patch_layer_norm=True, drop_path_rate=0.0, attention_probs_dropout_prob=0.0, qkv_bias=True, mlp_ratio=4.0, aff_block_r=4, num_hidden_layers=4, projection_hidden_act="relu", layer_norm_eps=1e-5, initializer_factor=1.0, **kwargs, ): super().__init__(**kwargs) self.window_size = window_size self.num_mel_bins = num_mel_bins self.spec_size = spec_size self.patch_size = patch_size self.patch_stride = patch_stride self.num_classes = num_classes self.hidden_size = hidden_size self.depths = depths self.num_hidden_layers = num_hidden_layers self.num_attention_heads = num_attention_heads self.window_size = window_size self.enable_fusion = enable_fusion self.fusion_type = fusion_type self.hidden_act = hidden_act self.hidden_dropout_prob = hidden_dropout_prob self.projection_dim = projection_dim self.flatten_patch_embeds = flatten_patch_embeds self.patch_embeds_hidden_size = patch_embeds_hidden_size self.enable_patch_layer_norm = enable_patch_layer_norm self.drop_path_rate = drop_path_rate self.attention_probs_dropout_prob = attention_probs_dropout_prob self.qkv_bias = qkv_bias self.mlp_ratio = mlp_ratio self.patch_embed_input_channels = patch_embed_input_channels self.aff_block_r = aff_block_r self.layer_norm_eps = layer_norm_eps self.initializer_factor = initializer_factor self.projection_hidden_act = projection_hidden_act @classmethod def from_pretrained(cls, pretrained_model_name_or_path: Union[str, os.PathLike], **kwargs) -> "PretrainedConfig": cls._set_token_in_kwargs(kwargs) config_dict, kwargs = cls.get_config_dict(pretrained_model_name_or_path, **kwargs) # get the audio config dict if we are loading from ClapConfig if config_dict.get("model_type") == "clap": config_dict = config_dict["audio_config"] if "model_type" in config_dict and hasattr(cls, "model_type") and config_dict["model_type"] != cls.model_type: logger.warning( f"You are using a model of type {config_dict['model_type']} to instantiate a model of type " f"{cls.model_type}. This is not supported for all configurations of models and can yield errors." ) return cls.from_dict(config_dict, **kwargs) class ClapConfig(PretrainedConfig): r""" [`ClapConfig`] is the configuration class to store the configuration of a [`ClapModel`]. It is used to instantiate a CLAP model according to the specified arguments, defining the text model and audio model configs. Instantiating a configuration with the defaults will yield a similar configuration to that of the CLAP [laion/clap-htsat-fused](https://huggingface.co/laion/clap-htsat-fused) architecture. Configuration objects inherit from [`PretrainedConfig`] and can be used to control the model outputs. Read the documentation from [`PretrainedConfig`] for more information. Args: text_config (`dict`, *optional*): Dictionary of configuration options used to initialize [`ClapTextConfig`]. audio_config (`dict`, *optional*): Dictionary of configuration options used to initialize [`ClapAudioConfig`]. logit_scale_init_value (`float`, *optional*, defaults to 14.29): The inital value of the *logit_scale* paramter. Default is used as per the original CLAP implementation. projection_dim (`int`, *optional*, defaults to 512): Dimentionality of text and audio projection layers. projection_hidden_act (`str`, *optional*, defaults to `"relu"`): Activation function for the projection layers. initializer_factor (`float`, *optional*, defaults to 1.0): Factor to scale the initialization of the model weights. kwargs (*optional*): Dictionary of keyword arguments. Example: ```python >>> from transformers import ClapConfig, ClapModel >>> # Initializing a ClapConfig with laion-ai/base style configuration >>> configuration = ClapConfig() >>> # Initializing a ClapModel (with random weights) from the laion-ai/base style configuration >>> model = ClapModel(configuration) >>> # Accessing the model configuration >>> configuration = model.config >>> # We can also initialize a ClapConfig from a ClapTextConfig and a ClapAudioConfig >>> from transformers import ClapTextConfig, ClapAudioConfig >>> # Initializing a ClapText and ClapAudioConfig configuration >>> config_text = ClapTextConfig() >>> config_audio = ClapAudioConfig() >>> config = ClapConfig.from_text_audio_configs(config_text, config_audio) ```""" model_type = "clap" def __init__( self, text_config=None, audio_config=None, logit_scale_init_value=(1 / 0.07), projection_dim=512, projection_hidden_act="relu", initializer_factor=1.0, **kwargs, ): super().__init__(**kwargs) if text_config is None: text_config = {} logger.info("text_config is None. Initializing the ClapTextConfig with default values.") if audio_config is None: audio_config = {} logger.info("audio_config is None. initializing the ClapAudioConfig with default values.") self.text_config = ClapTextConfig(**text_config) self.audio_config = ClapAudioConfig(**audio_config) self.text_config.projection_dim = projection_dim self.audio_config.projection_dim = projection_dim self.text_config.projection_hidden_act = projection_hidden_act self.audio_config.projection_hidden_act = projection_hidden_act self.projection_dim = projection_dim self.projection_hidden_act = projection_hidden_act self.hidden_size = self.text_config.hidden_size self.logit_scale_init_value = logit_scale_init_value self.initializer_factor = initializer_factor self.num_hidden_layers = self.text_config.num_hidden_layers + len(self.audio_config.depths) @classmethod def from_text_audio_configs(cls, text_config: ClapTextConfig, audio_config: ClapAudioConfig, **kwargs): r""" Instantiate a [`ClapConfig`] (or a derived class) from clap text model configuration and clap audio model configuration. Returns: [`ClapConfig`]: An instance of a configuration object """ return cls(text_config=text_config.to_dict(), audio_config=audio_config.to_dict(), **kwargs)

transformers/src/transformers/models/clap/configuration_clap.py/0

{ "file_path": "transformers/src/transformers/models/clap/configuration_clap.py", "repo_id": "transformers", "token_count": 7965 }

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# Copyright 2022 The HuggingFace Team. All rights reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. from typing import TYPE_CHECKING from ...utils import OptionalDependencyNotAvailable, _LazyModule, is_torch_available _import_structure = { "configuration_clipseg": [ "CLIPSEG_PRETRAINED_CONFIG_ARCHIVE_MAP", "CLIPSegConfig", "CLIPSegTextConfig", "CLIPSegVisionConfig", ], "processing_clipseg": ["CLIPSegProcessor"], } try: if not is_torch_available(): raise OptionalDependencyNotAvailable() except OptionalDependencyNotAvailable: pass else: _import_structure["modeling_clipseg"] = [ "CLIPSEG_PRETRAINED_MODEL_ARCHIVE_LIST", "CLIPSegModel", "CLIPSegPreTrainedModel", "CLIPSegTextModel", "CLIPSegVisionModel", "CLIPSegForImageSegmentation", ] if TYPE_CHECKING: from .configuration_clipseg import ( CLIPSEG_PRETRAINED_CONFIG_ARCHIVE_MAP, CLIPSegConfig, CLIPSegTextConfig, CLIPSegVisionConfig, ) from .processing_clipseg import CLIPSegProcessor try: if not is_torch_available(): raise OptionalDependencyNotAvailable() except OptionalDependencyNotAvailable: pass else: from .modeling_clipseg import ( CLIPSEG_PRETRAINED_MODEL_ARCHIVE_LIST, CLIPSegForImageSegmentation, CLIPSegModel, CLIPSegPreTrainedModel, CLIPSegTextModel, CLIPSegVisionModel, ) else: import sys sys.modules[__name__] = _LazyModule(__name__, globals()["__file__"], _import_structure, module_spec=__spec__)

transformers/src/transformers/models/clipseg/__init__.py/0

{ "file_path": "transformers/src/transformers/models/clipseg/__init__.py", "repo_id": "transformers", "token_count": 864 }

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# coding=utf-8 # Copyright 2018 The Google AI Language Team Authors and The HuggingFace Inc. team. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. """Tokenization classes.""" import os from shutil import copyfile from typing import List, Optional, Tuple from ...tokenization_utils_fast import AddedToken, PreTrainedTokenizerFast from ...utils import logging logger = logging.get_logger(__name__) VOCAB_FILES_NAMES = {"vocab_file": "spiece.model", "tokenizer_file": "tokenizer.json"} PRETRAINED_VOCAB_FILES_MAP = { "vocab_file": { "TsinghuaAI/CPM-Generate": "https://huggingface.co/TsinghuaAI/CPM-Generate/resolve/main/spiece.model", }, "tokenizer_file": { "TsinghuaAI/CPM-Generate": "https://huggingface.co/TsinghuaAI/CPM-Generate/resolve/main/tokenizer.json", }, } class CpmTokenizerFast(PreTrainedTokenizerFast): """Runs pre-tokenization with Jieba segmentation tool. It is used in CPM models.""" def __init__( self, vocab_file=None, tokenizer_file=None, do_lower_case=False, remove_space=True, keep_accents=False, bos_token="<s>", eos_token="</s>", unk_token="<unk>", sep_token="<sep>", pad_token="<pad>", cls_token="<cls>", mask_token="<mask>", additional_special_tokens=["<eop>", "<eod>"], **kwargs, ): """ Construct a CPM tokenizer. Based on [Jieba](https://pypi.org/project/jieba/) and [SentencePiece](https://github.com/google/sentencepiece). This tokenizer inherits from [`PreTrainedTokenizer`] which contains most of the main methods. Users should refer to this superclass for more information regarding those methods. Args: vocab_file (`str`): [SentencePiece](https://github.com/google/sentencepiece) file (generally has a .spm extension) that contains the vocabulary necessary to instantiate a tokenizer. do_lower_case (`bool`, *optional*, defaults to `True`): Whether to lowercase the input when tokenizing. remove_space (`bool`, *optional*, defaults to `True`): Whether to strip the text when tokenizing (removing excess spaces before and after the string). keep_accents (`bool`, *optional*, defaults to `False`): Whether to keep accents when tokenizing. bos_token (`str`, *optional*, defaults to `"<s>"`): The beginning of sequence token that was used during pretraining. Can be used a sequence classifier token. <Tip> When building a sequence using special tokens, this is not the token that is used for the beginning of sequence. The token used is the `cls_token`. </Tip> eos_token (`str`, *optional*, defaults to `"</s>"`): The end of sequence token. <Tip> When building a sequence using special tokens, this is not the token that is used for the end of sequence. The token used is the `sep_token`. </Tip> unk_token (`str`, *optional*, defaults to `"<unk>"`): The unknown token. A token that is not in the vocabulary cannot be converted to an ID and is set to be this token instead. sep_token (`str`, *optional*, defaults to `"<sep>"`): The separator token, which is used when building a sequence from multiple sequences, e.g. two sequences for sequence classification or for a text and a question for question answering. It is also used as the last token of a sequence built with special tokens. pad_token (`str`, *optional*, defaults to `"<pad>"`): The token used for padding, for example when batching sequences of different lengths. cls_token (`str`, *optional*, defaults to `"<cls>"`): The classifier token which is used when doing sequence classification (classification of the whole sequence instead of per-token classification). It is the first token of the sequence when built with special tokens. mask_token (`str`, *optional*, defaults to `"<mask>"`): The token used for masking values. This is the token used when training this model with masked language modeling. This is the token which the model will try to predict. additional_special_tokens (`List[str]`, *optional*, defaults to `["<eop>", "<eod>"]`): Additional special tokens used by the tokenizer. Attributes: sp_model (`SentencePieceProcessor`): The *SentencePiece* processor that is used for every conversion (string, tokens and IDs). """ # Mask token behave like a normal word, i.e. include the space before it mask_token = AddedToken(mask_token, lstrip=True, rstrip=False) if isinstance(mask_token, str) else mask_token super().__init__( vocab_file=vocab_file, tokenizer_file=tokenizer_file, do_lower_case=do_lower_case, remove_space=remove_space, keep_accents=keep_accents, bos_token=bos_token, eos_token=eos_token, unk_token=unk_token, sep_token=sep_token, pad_token=pad_token, cls_token=cls_token, mask_token=mask_token, additional_special_tokens=additional_special_tokens, **kwargs, ) self._pad_token_type_id = 3 self.do_lower_case = do_lower_case self.remove_space = remove_space self.keep_accents = keep_accents self.vocab_file = vocab_file try: import jieba except ModuleNotFoundError as error: raise error.__class__( "You need to install jieba to use CpmTokenizer or CpmTokenizerFast. " "See https://pypi.org/project/jieba/ for installation." ) self.jieba = jieba self.translator = str.maketrans(" \n", "\u2582\u2583") @property def can_save_slow_tokenizer(self) -> bool: return os.path.isfile(self.vocab_file) if self.vocab_file else False # Copied from transformers.models.xlnet.tokenization_xlnet_fast.XLNetTokenizerFast.build_inputs_with_special_tokens def build_inputs_with_special_tokens( self, token_ids_0: List[int], token_ids_1: Optional[List[int]] = None ) -> List[int]: """ Build model inputs from a sequence or a pair of sequence for sequence classification tasks by concatenating and adding special tokens. An XLNet sequence has the following format: - single sequence: `X <sep> <cls>` - pair of sequences: `A <sep> B <sep> <cls>` Args: token_ids_0 (`List[int]`): List of IDs to which the special tokens will be added. token_ids_1 (`List[int]`, *optional*): Optional second list of IDs for sequence pairs. Returns: `List[int]`: List of [input IDs](../glossary#input-ids) with the appropriate special tokens. """ sep = [self.sep_token_id] cls = [self.cls_token_id] if token_ids_1 is None: return token_ids_0 + sep + cls return token_ids_0 + sep + token_ids_1 + sep + cls # Copied from transformers.models.xlnet.tokenization_xlnet_fast.XLNetTokenizerFast.create_token_type_ids_from_sequences def create_token_type_ids_from_sequences( self, token_ids_0: List[int], token_ids_1: Optional[List[int]] = None ) -> List[int]: """ Create a mask from the two sequences passed to be used in a sequence-pair classification task. An XLNet sequence pair mask has the following format: ``` 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 | first sequence | second sequence | ``` If `token_ids_1` is `None`, this method only returns the first portion of the mask (0s). Args: token_ids_0 (`List[int]`): List of IDs. token_ids_1 (`List[int]`, *optional*): Optional second list of IDs for sequence pairs. Returns: `List[int]`: List of [token type IDs](../glossary#token-type-ids) according to the given sequence(s). """ sep = [self.sep_token_id] cls_segment_id = [2] if token_ids_1 is None: return len(token_ids_0 + sep) * [0] + cls_segment_id return len(token_ids_0 + sep) * [0] + len(token_ids_1 + sep) * [1] + cls_segment_id # Copied from transformers.models.xlnet.tokenization_xlnet_fast.XLNetTokenizerFast.save_vocabulary def save_vocabulary(self, save_directory: str, filename_prefix: Optional[str] = None) -> Tuple[str]: if not self.can_save_slow_tokenizer: raise ValueError( "Your fast tokenizer does not have the necessary information to save the vocabulary for a slow " "tokenizer." ) if not os.path.isdir(save_directory): logger.error(f"Vocabulary path ({save_directory}) should be a directory") return out_vocab_file = os.path.join( save_directory, (filename_prefix + "-" if filename_prefix else "") + VOCAB_FILES_NAMES["vocab_file"] ) if os.path.abspath(self.vocab_file) != os.path.abspath(out_vocab_file): copyfile(self.vocab_file, out_vocab_file) return (out_vocab_file,) def _batch_encode_plus(self, batch_text_or_text_pairs, *args, **kwargs): batch_text_or_text_pairs = [ " ".join([x.translate(self.translator) for x in self.jieba.cut(text, cut_all=False)]) for text in batch_text_or_text_pairs ] return super()._batch_encode_plus(batch_text_or_text_pairs, *args, **kwargs) def _decode(self, *args, **kwargs): text = super()._decode(*args, **kwargs) text = text.replace(" ", "").replace("\u2582", " ").replace("\u2583", "\n") return text

transformers/src/transformers/models/cpm/tokenization_cpm_fast.py/0

{ "file_path": "transformers/src/transformers/models/cpm/tokenization_cpm_fast.py", "repo_id": "transformers", "token_count": 4599 }

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# coding=utf-8 # Copyright 2022 The HuggingFace Inc. team. All rights reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. """ Data2VecText configuration""" import math from ...configuration_utils import PretrainedConfig from ...utils import logging logger = logging.get_logger(__name__) DATA2VEC_AUDIO_PRETRAINED_CONFIG_ARCHIVE_MAP = { "facebook/data2vec-base-960h": "https://huggingface.co/facebook/data2vec-audio-base-960h/resolve/main/config.json", # See all Data2VecAudio models at https://huggingface.co/models?filter=data2vec-audio } class Data2VecAudioConfig(PretrainedConfig): r""" This is the configuration class to store the configuration of a [`Data2VecAudioModel`]. It is used to instantiate an Data2VecAudio model according to the specified arguments, defining the model architecture. Instantiating a configuration with the defaults will yield a similar configuration to that of the Data2VecAudio [facebook/data2vec-audio-base-960h](https://huggingface.co/facebook/data2vec-audio-base-960h) architecture. Configuration objects inherit from [`PretrainedConfig`] and can be used to control the model outputs. Read the documentation from [`PretrainedConfig`] for more information. Args: vocab_size (`int`, *optional*, defaults to 32): Vocabulary size of the Data2VecAudio model. Defines the number of different tokens that can be represented by the `inputs_ids` passed when calling [`Data2VecAudioModel`] or [`TFData2VecAudioModel`]. Vocabulary size of the model. Defines the different tokens that can be represented by the *inputs_ids* passed to the forward method of [`Data2VecAudioModel`]. hidden_size (`int`, *optional*, defaults to 768): Dimensionality of the encoder layers and the pooler layer. num_hidden_layers (`int`, *optional*, defaults to 12): Number of hidden layers in the Transformer encoder. num_attention_heads (`int`, *optional*, defaults to 12): Number of attention heads for each attention layer in the Transformer encoder. intermediate_size (`int`, *optional*, defaults to 3072): Dimensionality of the "intermediate" (i.e., feed-forward) layer in the Transformer encoder. hidden_act (`str` or `function`, *optional*, defaults to `"gelu"`): The non-linear activation function (function or string) in the encoder and pooler. If string, `"gelu"`, `"relu"`, `"selu"` and `"gelu_new"` are supported. hidden_dropout (`float`, *optional*, defaults to 0.1): The dropout probability for all fully connected layers in the embeddings, encoder, and pooler. activation_dropout (`float`, *optional*, defaults to 0.1): The dropout ratio for activations inside the fully connected layer. attention_dropout (`float`, *optional*, defaults to 0.1): The dropout ratio for the attention probabilities. final_dropout (`float`, *optional*, defaults to 0.1): The dropout probability for the final projection layer of [`Data2VecAudioForCTC`]. layerdrop (`float`, *optional*, defaults to 0.1): The LayerDrop probability. See the [LayerDrop paper](see https://arxiv.org/abs/1909.11556) for more details. initializer_range (`float`, *optional*, defaults to 0.02): The standard deviation of the truncated_normal_initializer for initializing all weight matrices. layer_norm_eps (`float`, *optional*, defaults to 1e-12): The epsilon used by the layer normalization layers. feat_proj_dropout (`float`, *optional*, defaults to 0.0): The dropout probability for output of the feature encoder. feat_extract_activation (`str, `optional`, defaults to `"gelu"`): The non-linear activation function (function or string) in the 1D convolutional layers of the feature extractor. If string, `"gelu"`, `"relu"`, `"selu"` and `"gelu_new"` are supported. conv_dim (`Tuple[int]` or `List[int]`, *optional*, defaults to `(512, 512, 512, 512, 512, 512, 512)`): A tuple of integers defining the number of input and output channels of each 1D convolutional layer in the feature encoder. The length of *conv_dim* defines the number of 1D convolutional layers. conv_stride (`Tuple[int]` or `List[int]`, *optional*, defaults to `(5, 2, 2, 2, 2, 2, 2)`): A tuple of integers defining the stride of each 1D convolutional layer in the feature encoder. The length of *conv_stride* defines the number of convolutional layers and has to match the length of *conv_dim*. conv_kernel (`Tuple[int]` or `List[int]`, *optional*, defaults to `(10, 3, 3, 3, 3, 3, 3)`): A tuple of integers defining the kernel size of each 1D convolutional layer in the feature encoder. The length of *conv_kernel* defines the number of convolutional layers and has to match the length of *conv_dim*. conv_bias (`bool`, *optional*, defaults to `False`): Whether the 1D convolutional layers have a bias. num_conv_pos_embeddings (`int`, *optional*, defaults to 128): Number of convolutional positional embeddings. Defines the kernel size of 1D convolutional positional embeddings layer. num_conv_pos_embedding_groups (`int`, *optional*, defaults to 16): Number of groups of 1D convolutional positional embeddings layer. mask_time_prob (`float`, *optional*, defaults to 0.05): Percentage (between 0 and 1) of all feature vectors along the time axis which will be masked. The masking procecure generates ''mask_time_prob*len(time_axis)/mask_time_length'' independent masks over the axis. If reasoning from the propability of each feature vector to be chosen as the start of the vector span to be masked, *mask_time_prob* should be `prob_vector_start*mask_time_length`. Note that overlap may decrease the mask_time_length (`int`, *optional*, defaults to 10): Length of vector span along the time axis. mask_time_min_masks (`int`, *optional*, defaults to 2),: The minimum number of masks of length `mask_feature_length` generated along the time axis, each time step, irrespectively of `mask_feature_prob`. Only relevant if ''mask_time_prob*len(time_axis)/mask_time_length < mask_time_min_masks'' mask_feature_prob (`float`, *optional*, defaults to 0.0): Percentage (between 0 and 1) of all feature vectors along the feature axis which will be masked. The masking procecure generates ''mask_feature_prob*len(feature_axis)/mask_time_length'' independent masks over the axis. If reasoning from the propability of each feature vector to be chosen as the start of the vector span to be masked, *mask_feature_prob* should be `prob_vector_start*mask_feature_length`. Note that overlap may decrease the actual percentage of masked vectors. This is only relevant if `apply_spec_augment is True`. mask_feature_length (`int`, *optional*, defaults to 10): Length of vector span along the feature axis. mask_feature_min_masks (`int`, *optional*, defaults to 0),: The minimum number of masks of length `mask_feature_length` generated along the feature axis, each time step, irrespectively of `mask_feature_prob`. Only relevant if ''mask_feature_prob*len(feature_axis)/mask_feature_length < mask_feature_min_masks'' ctc_loss_reduction (`str`, *optional*, defaults to `"sum"`): Specifies the reduction to apply to the output of `torch.nn.CTCLoss`. Only relevant when training an instance of [`Data2VecAudioForCTC`]. ctc_zero_infinity (`bool`, *optional*, defaults to `False`): Whether to zero infinite losses and the associated gradients of `torch.nn.CTCLoss`. Infinite losses mainly occur when the inputs are too short to be aligned to the targets. Only relevant when training an instance of [`Data2VecAudioForCTC`]. use_weighted_layer_sum (`bool`, *optional*, defaults to `False`): Whether to use a weighted average of layer outputs with learned weights. Only relevant when using an instance of [`Data2VecAudioForSequenceClassification`]. classifier_proj_size (`int`, *optional*, defaults to 256): Dimensionality of the projection before token mean-pooling for classification. tdnn_dim (`Tuple[int]` or `List[int]`, *optional*, defaults to `(512, 512, 512, 512, 1500)`): A tuple of integers defining the number of output channels of each 1D convolutional layer in the *TDNN* module of the *XVector* model. The length of *tdnn_dim* defines the number of *TDNN* layers. tdnn_kernel (`Tuple[int]` or `List[int]`, *optional*, defaults to `(5, 3, 3, 1, 1)`): A tuple of integers defining the kernel size of each 1D convolutional layer in the *TDNN* module of the *XVector* model. The length of *tdnn_kernel* has to match the length of *tdnn_dim*. tdnn_dilation (`Tuple[int]` or `List[int]`, *optional*, defaults to `(1, 2, 3, 1, 1)`): A tuple of integers defining the dilation factor of each 1D convolutional layer in *TDNN* module of the *XVector* model. The length of *tdnn_dilation* has to match the length of *tdnn_dim*. xvector_output_dim (`int`, *optional*, defaults to 512): Dimensionality of the *XVector* embedding vectors. add_adapter (`bool`, *optional*, defaults to `False`): Whether a convolutional network should be stacked on top of the Data2VecAudio Encoder. Can be very useful for warm-starting Data2VecAudio for SpeechEncoderDecoder models. adapter_kernel_size (`int`, *optional*, defaults to 3): Kernel size of the convolutional layers in the adapter network. Only relevant if `add_adapter is True`. adapter_stride (`int`, *optional*, defaults to 2): Stride of the convolutional layers in the adapter network. Only relevant if `add_adapter is True`. num_adapter_layers (`int`, *optional*, defaults to 3): Number of convolutional layers that should be used in the adapter network. Only relevant if `add_adapter is True`. output_hidden_size (`int`, *optional*): Dimensionality of the encoder output layer. If not defined, this defaults to *hidden-size*. Only relevant if `add_adapter is True`. Example: ```python >>> from transformers import Data2VecAudioConfig, Data2VecAudioModel >>> # Initializing a Data2VecAudio facebook/data2vec-audio-base-960h style configuration >>> configuration = Data2VecAudioConfig() >>> # Initializing a model (with random weights) from the facebook/data2vec-audio-base-960h style configuration >>> model = Data2VecAudioModel(configuration) >>> # Accessing the model configuration >>> configuration = model.config ```""" model_type = "data2vec-audio" def __init__( self, vocab_size=32, hidden_size=768, num_hidden_layers=12, num_attention_heads=12, intermediate_size=3072, hidden_act="gelu", hidden_dropout=0.1, activation_dropout=0.1, attention_dropout=0.1, feat_proj_dropout=0.0, final_dropout=0.1, layerdrop=0.1, initializer_range=0.02, layer_norm_eps=1e-5, feat_extract_activation="gelu", conv_dim=(512, 512, 512, 512, 512, 512, 512), conv_stride=(5, 2, 2, 2, 2, 2, 2), conv_kernel=(10, 3, 3, 3, 3, 2, 2), conv_bias=False, num_conv_pos_embedding_groups=16, conv_pos_kernel_size=19, num_conv_pos_embeddings=5, mask_time_prob=0.05, mask_time_length=10, mask_time_min_masks=2, mask_feature_prob=0.0, mask_feature_length=10, mask_feature_min_masks=0, ctc_loss_reduction="sum", ctc_zero_infinity=False, use_weighted_layer_sum=False, classifier_proj_size=256, tdnn_dim=(512, 512, 512, 512, 1500), tdnn_kernel=(5, 3, 3, 1, 1), tdnn_dilation=(1, 2, 3, 1, 1), xvector_output_dim=512, pad_token_id=0, bos_token_id=1, eos_token_id=2, add_adapter=False, adapter_kernel_size=3, adapter_stride=2, num_adapter_layers=3, output_hidden_size=None, **kwargs, ): super().__init__(**kwargs, pad_token_id=pad_token_id, bos_token_id=bos_token_id, eos_token_id=eos_token_id) self.hidden_size = hidden_size self.feat_extract_activation = feat_extract_activation self.conv_dim = list(conv_dim) self.conv_stride = list(conv_stride) self.conv_kernel = list(conv_kernel) self.conv_bias = conv_bias self.num_conv_pos_embeddings = num_conv_pos_embeddings self.num_conv_pos_embedding_groups = num_conv_pos_embedding_groups self.conv_pos_kernel_size = conv_pos_kernel_size self.num_feat_extract_layers = len(self.conv_dim) self.num_hidden_layers = num_hidden_layers self.intermediate_size = intermediate_size self.hidden_act = hidden_act self.num_attention_heads = num_attention_heads self.hidden_dropout = hidden_dropout self.attention_dropout = attention_dropout self.activation_dropout = activation_dropout self.feat_proj_dropout = feat_proj_dropout self.final_dropout = final_dropout self.layerdrop = layerdrop self.layer_norm_eps = layer_norm_eps self.initializer_range = initializer_range self.vocab_size = vocab_size self.use_weighted_layer_sum = use_weighted_layer_sum if ( (len(self.conv_stride) != self.num_feat_extract_layers) or (len(self.conv_kernel) != self.num_feat_extract_layers) or (len(self.conv_dim) != self.num_feat_extract_layers) ): raise ValueError( "Configuration for convolutional layers is incorrect. It is required that `len(config.conv_dim)` ==" " `len(config.conv_stride)` == `len(config.conv_kernel)`, but is `len(config.conv_dim) =" f" {len(self.conv_dim)}`, `len(config.conv_stride) = {len(self.conv_stride)}`," f" `len(config.conv_kernel) = {len(self.conv_kernel)}`." ) # fine-tuning config parameters for SpecAugment: https://arxiv.org/abs/1904.08779 self.mask_time_prob = mask_time_prob self.mask_time_length = mask_time_length self.mask_time_min_masks = mask_time_min_masks self.mask_feature_prob = mask_feature_prob self.mask_feature_length = mask_feature_length self.mask_feature_min_masks = mask_feature_min_masks # ctc loss self.ctc_loss_reduction = ctc_loss_reduction self.ctc_zero_infinity = ctc_zero_infinity # adapter self.add_adapter = add_adapter self.adapter_kernel_size = adapter_kernel_size self.adapter_stride = adapter_stride self.num_adapter_layers = num_adapter_layers self.output_hidden_size = output_hidden_size or hidden_size # SequenceClassification-specific parameter. Feel free to ignore for other classes. self.classifier_proj_size = classifier_proj_size # XVector-specific parameters. Feel free to ignore for other classes. self.tdnn_dim = list(tdnn_dim) self.tdnn_kernel = list(tdnn_kernel) self.tdnn_dilation = list(tdnn_dilation) self.xvector_output_dim = xvector_output_dim @property def inputs_to_logits_ratio(self): return math.prod(self.conv_stride)

transformers/src/transformers/models/data2vec/configuration_data2vec_audio.py/0

{ "file_path": "transformers/src/transformers/models/data2vec/configuration_data2vec_audio.py", "repo_id": "transformers", "token_count": 6503 }

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# Copyright 2021 The HuggingFace Team. All rights reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. from typing import TYPE_CHECKING from ...utils import ( OptionalDependencyNotAvailable, _LazyModule, is_tf_available, is_torch_available, is_vision_available, ) _import_structure = {"configuration_deit": ["DEIT_PRETRAINED_CONFIG_ARCHIVE_MAP", "DeiTConfig", "DeiTOnnxConfig"]} try: if not is_vision_available(): raise OptionalDependencyNotAvailable() except OptionalDependencyNotAvailable: pass else: _import_structure["feature_extraction_deit"] = ["DeiTFeatureExtractor"] _import_structure["image_processing_deit"] = ["DeiTImageProcessor"] try: if not is_torch_available(): raise OptionalDependencyNotAvailable() except OptionalDependencyNotAvailable: pass else: _import_structure["modeling_deit"] = [ "DEIT_PRETRAINED_MODEL_ARCHIVE_LIST", "DeiTForImageClassification", "DeiTForImageClassificationWithTeacher", "DeiTForMaskedImageModeling", "DeiTModel", "DeiTPreTrainedModel", ] try: if not is_tf_available(): raise OptionalDependencyNotAvailable() except OptionalDependencyNotAvailable: pass else: _import_structure["modeling_tf_deit"] = [ "TF_DEIT_PRETRAINED_MODEL_ARCHIVE_LIST", "TFDeiTForImageClassification", "TFDeiTForImageClassificationWithTeacher", "TFDeiTForMaskedImageModeling", "TFDeiTModel", "TFDeiTPreTrainedModel", ] if TYPE_CHECKING: from .configuration_deit import DEIT_PRETRAINED_CONFIG_ARCHIVE_MAP, DeiTConfig, DeiTOnnxConfig try: if not is_vision_available(): raise OptionalDependencyNotAvailable() except OptionalDependencyNotAvailable: pass else: from .feature_extraction_deit import DeiTFeatureExtractor from .image_processing_deit import DeiTImageProcessor try: if not is_torch_available(): raise OptionalDependencyNotAvailable() except OptionalDependencyNotAvailable: pass else: from .modeling_deit import ( DEIT_PRETRAINED_MODEL_ARCHIVE_LIST, DeiTForImageClassification, DeiTForImageClassificationWithTeacher, DeiTForMaskedImageModeling, DeiTModel, DeiTPreTrainedModel, ) try: if not is_tf_available(): raise OptionalDependencyNotAvailable() except OptionalDependencyNotAvailable: pass else: from .modeling_tf_deit import ( TF_DEIT_PRETRAINED_MODEL_ARCHIVE_LIST, TFDeiTForImageClassification, TFDeiTForImageClassificationWithTeacher, TFDeiTForMaskedImageModeling, TFDeiTModel, TFDeiTPreTrainedModel, ) else: import sys sys.modules[__name__] = _LazyModule(__name__, globals()["__file__"], _import_structure, module_spec=__spec__)

transformers/src/transformers/models/deit/__init__.py/0

{ "file_path": "transformers/src/transformers/models/deit/__init__.py", "repo_id": "transformers", "token_count": 1438 }

81

# coding=utf-8 # Copyright (c) Facebook, Inc. and its affiliates. # Copyright (c) HuggingFace Inc. team. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. """ MMBT configuration""" from ....utils import logging logger = logging.get_logger(__name__) class MMBTConfig(object): """ This is the configuration class to store the configuration of a [`MMBTModel`]. It is used to instantiate a MMBT model according to the specified arguments, defining the model architecture. Args: config ([`PreTrainedConfig`]): Config of the underlying Transformer models. Its values are copied over to use a single config. num_labels (`int`, *optional*): Size of final Linear layer for classification. modal_hidden_size (`int`, *optional*, defaults to 2048): Embedding dimension of the non-text modality encoder. """ def __init__(self, config, num_labels=None, modal_hidden_size=2048): self.__dict__ = config.__dict__ self.modal_hidden_size = modal_hidden_size if num_labels: self.num_labels = num_labels

transformers/src/transformers/models/deprecated/mmbt/configuration_mmbt.py/0

{ "file_path": "transformers/src/transformers/models/deprecated/mmbt/configuration_mmbt.py", "repo_id": "transformers", "token_count": 531 }

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# coding=utf-8 # Copyright 2022 The HuggingFace Inc. team. All rights reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. """ Dilated Neighborhood Attention Transformer model configuration""" from ...configuration_utils import PretrainedConfig from ...utils import logging from ...utils.backbone_utils import BackboneConfigMixin, get_aligned_output_features_output_indices logger = logging.get_logger(__name__) DINAT_PRETRAINED_CONFIG_ARCHIVE_MAP = { "shi-labs/dinat-mini-in1k-224": "https://huggingface.co/shi-labs/dinat-mini-in1k-224/resolve/main/config.json", # See all Dinat models at https://huggingface.co/models?filter=dinat } class DinatConfig(BackboneConfigMixin, PretrainedConfig): r""" This is the configuration class to store the configuration of a [`DinatModel`]. It is used to instantiate a Dinat model according to the specified arguments, defining the model architecture. Instantiating a configuration with the defaults will yield a similar configuration to that of the Dinat [shi-labs/dinat-mini-in1k-224](https://huggingface.co/shi-labs/dinat-mini-in1k-224) architecture. Configuration objects inherit from [`PretrainedConfig`] and can be used to control the model outputs. Read the documentation from [`PretrainedConfig`] for more information. Args: patch_size (`int`, *optional*, defaults to 4): The size (resolution) of each patch. NOTE: Only patch size of 4 is supported at the moment. num_channels (`int`, *optional*, defaults to 3): The number of input channels. embed_dim (`int`, *optional*, defaults to 64): Dimensionality of patch embedding. depths (`List[int]`, *optional*, defaults to `[3, 4, 6, 5]`): Number of layers in each level of the encoder. num_heads (`List[int]`, *optional*, defaults to `[2, 4, 8, 16]`): Number of attention heads in each layer of the Transformer encoder. kernel_size (`int`, *optional*, defaults to 7): Neighborhood Attention kernel size. dilations (`List[List[int]]`, *optional*, defaults to `[[1, 8, 1], [1, 4, 1, 4], [1, 2, 1, 2, 1, 2], [1, 1, 1, 1, 1]]`): Dilation value of each NA layer in the Transformer encoder. mlp_ratio (`float`, *optional*, defaults to 3.0): Ratio of MLP hidden dimensionality to embedding dimensionality. qkv_bias (`bool`, *optional*, defaults to `True`): Whether or not a learnable bias should be added to the queries, keys and values. hidden_dropout_prob (`float`, *optional*, defaults to 0.0): The dropout probability for all fully connected layers in the embeddings and encoder. attention_probs_dropout_prob (`float`, *optional*, defaults to 0.0): The dropout ratio for the attention probabilities. drop_path_rate (`float`, *optional*, defaults to 0.1): Stochastic depth rate. hidden_act (`str` or `function`, *optional*, defaults to `"gelu"`): The non-linear activation function (function or string) in the encoder. If string, `"gelu"`, `"relu"`, `"selu"` and `"gelu_new"` are supported. initializer_range (`float`, *optional*, defaults to 0.02): The standard deviation of the truncated_normal_initializer for initializing all weight matrices. layer_norm_eps (`float`, *optional*, defaults to 1e-05): The epsilon used by the layer normalization layers. layer_scale_init_value (`float`, *optional*, defaults to 0.0): The initial value for the layer scale. Disabled if <=0. out_features (`List[str]`, *optional*): If used as backbone, list of features to output. Can be any of `"stem"`, `"stage1"`, `"stage2"`, etc. (depending on how many stages the model has). If unset and `out_indices` is set, will default to the corresponding stages. If unset and `out_indices` is unset, will default to the last stage. Must be in the same order as defined in the `stage_names` attribute. out_indices (`List[int]`, *optional*): If used as backbone, list of indices of features to output. Can be any of 0, 1, 2, etc. (depending on how many stages the model has). If unset and `out_features` is set, will default to the corresponding stages. If unset and `out_features` is unset, will default to the last stage. Must be in the same order as defined in the `stage_names` attribute. Example: ```python >>> from transformers import DinatConfig, DinatModel >>> # Initializing a Dinat shi-labs/dinat-mini-in1k-224 style configuration >>> configuration = DinatConfig() >>> # Initializing a model (with random weights) from the shi-labs/dinat-mini-in1k-224 style configuration >>> model = DinatModel(configuration) >>> # Accessing the model configuration >>> configuration = model.config ```""" model_type = "dinat" attribute_map = { "num_attention_heads": "num_heads", "num_hidden_layers": "num_layers", } def __init__( self, patch_size=4, num_channels=3, embed_dim=64, depths=[3, 4, 6, 5], num_heads=[2, 4, 8, 16], kernel_size=7, dilations=[[1, 8, 1], [1, 4, 1, 4], [1, 2, 1, 2, 1, 2], [1, 1, 1, 1, 1]], mlp_ratio=3.0, qkv_bias=True, hidden_dropout_prob=0.0, attention_probs_dropout_prob=0.0, drop_path_rate=0.1, hidden_act="gelu", initializer_range=0.02, layer_norm_eps=1e-5, layer_scale_init_value=0.0, out_features=None, out_indices=None, **kwargs, ): super().__init__(**kwargs) self.patch_size = patch_size self.num_channels = num_channels self.embed_dim = embed_dim self.depths = depths self.num_layers = len(depths) self.num_heads = num_heads self.kernel_size = kernel_size self.dilations = dilations self.mlp_ratio = mlp_ratio self.qkv_bias = qkv_bias self.hidden_dropout_prob = hidden_dropout_prob self.attention_probs_dropout_prob = attention_probs_dropout_prob self.drop_path_rate = drop_path_rate self.hidden_act = hidden_act self.layer_norm_eps = layer_norm_eps self.initializer_range = initializer_range # we set the hidden_size attribute in order to make Dinat work with VisionEncoderDecoderModel # this indicates the channel dimension after the last stage of the model self.hidden_size = int(embed_dim * 2 ** (len(depths) - 1)) self.layer_scale_init_value = layer_scale_init_value self.stage_names = ["stem"] + [f"stage{idx}" for idx in range(1, len(depths) + 1)] self._out_features, self._out_indices = get_aligned_output_features_output_indices( out_features=out_features, out_indices=out_indices, stage_names=self.stage_names )

transformers/src/transformers/models/dinat/configuration_dinat.py/0

{ "file_path": "transformers/src/transformers/models/dinat/configuration_dinat.py", "repo_id": "transformers", "token_count": 2945 }

83

# coding=utf-8 # Copyright 2022 The HuggingFace Inc. team. All rights reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. """ Donut Swin Transformer model configuration""" from ...configuration_utils import PretrainedConfig from ...utils import logging logger = logging.get_logger(__name__) DONUT_SWIN_PRETRAINED_CONFIG_ARCHIVE_MAP = { "naver-clova-ix/donut-base": "https://huggingface.co/naver-clova-ix/donut-base/resolve/main/config.json", # See all Donut models at https://huggingface.co/models?filter=donut-swin } class DonutSwinConfig(PretrainedConfig): r""" This is the configuration class to store the configuration of a [`DonutSwinModel`]. It is used to instantiate a Donut model according to the specified arguments, defining the model architecture. Instantiating a configuration with the defaults will yield a similar configuration to that of the Donut [naver-clova-ix/donut-base](https://huggingface.co/naver-clova-ix/donut-base) architecture. Configuration objects inherit from [`PretrainedConfig`] and can be used to control the model outputs. Read the documentation from [`PretrainedConfig`] for more information. Args: image_size (`int`, *optional*, defaults to 224): The size (resolution) of each image. patch_size (`int`, *optional*, defaults to 4): The size (resolution) of each patch. num_channels (`int`, *optional*, defaults to 3): The number of input channels. embed_dim (`int`, *optional*, defaults to 96): Dimensionality of patch embedding. depths (`list(int)`, *optional*, defaults to `[2, 2, 6, 2]`): Depth of each layer in the Transformer encoder. num_heads (`list(int)`, *optional*, defaults to `[3, 6, 12, 24]`): Number of attention heads in each layer of the Transformer encoder. window_size (`int`, *optional*, defaults to 7): Size of windows. mlp_ratio (`float`, *optional*, defaults to 4.0): Ratio of MLP hidden dimensionality to embedding dimensionality. qkv_bias (`bool`, *optional*, defaults to `True`): Whether or not a learnable bias should be added to the queries, keys and values. hidden_dropout_prob (`float`, *optional*, defaults to 0.0): The dropout probability for all fully connected layers in the embeddings and encoder. attention_probs_dropout_prob (`float`, *optional*, defaults to 0.0): The dropout ratio for the attention probabilities. drop_path_rate (`float`, *optional*, defaults to 0.1): Stochastic depth rate. hidden_act (`str` or `function`, *optional*, defaults to `"gelu"`): The non-linear activation function (function or string) in the encoder. If string, `"gelu"`, `"relu"`, `"selu"` and `"gelu_new"` are supported. use_absolute_embeddings (`bool`, *optional*, defaults to `False`): Whether or not to add absolute position embeddings to the patch embeddings. initializer_range (`float`, *optional*, defaults to 0.02): The standard deviation of the truncated_normal_initializer for initializing all weight matrices. layer_norm_eps (`float`, *optional*, defaults to 1e-05): The epsilon used by the layer normalization layers. Example: ```python >>> from transformers import DonutSwinConfig, DonutSwinModel >>> # Initializing a Donut naver-clova-ix/donut-base style configuration >>> configuration = DonutSwinConfig() >>> # Randomly initializing a model from the naver-clova-ix/donut-base style configuration >>> model = DonutSwinModel(configuration) >>> # Accessing the model configuration >>> configuration = model.config ```""" model_type = "donut-swin" attribute_map = { "num_attention_heads": "num_heads", "num_hidden_layers": "num_layers", } def __init__( self, image_size=224, patch_size=4, num_channels=3, embed_dim=96, depths=[2, 2, 6, 2], num_heads=[3, 6, 12, 24], window_size=7, mlp_ratio=4.0, qkv_bias=True, hidden_dropout_prob=0.0, attention_probs_dropout_prob=0.0, drop_path_rate=0.1, hidden_act="gelu", use_absolute_embeddings=False, initializer_range=0.02, layer_norm_eps=1e-5, **kwargs, ): super().__init__(**kwargs) self.image_size = image_size self.patch_size = patch_size self.num_channels = num_channels self.embed_dim = embed_dim self.depths = depths self.num_layers = len(depths) self.num_heads = num_heads self.window_size = window_size self.mlp_ratio = mlp_ratio self.qkv_bias = qkv_bias self.hidden_dropout_prob = hidden_dropout_prob self.attention_probs_dropout_prob = attention_probs_dropout_prob self.drop_path_rate = drop_path_rate self.hidden_act = hidden_act self.use_absolute_embeddings = use_absolute_embeddings self.layer_norm_eps = layer_norm_eps self.initializer_range = initializer_range # we set the hidden_size attribute in order to make Swin work with VisionEncoderDecoderModel # this indicates the channel dimension after the last stage of the model self.hidden_size = int(embed_dim * 2 ** (len(depths) - 1))

transformers/src/transformers/models/donut/configuration_donut_swin.py/0

{ "file_path": "transformers/src/transformers/models/donut/configuration_donut_swin.py", "repo_id": "transformers", "token_count": 2322 }

84

# coding=utf-8 # Copyright 2023 The HuggingFace Inc. team. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. """Convert DPT 3.1 checkpoints from the MiDaS repository. URL: https://github.com/isl-org/MiDaS""" import argparse from pathlib import Path import requests import torch from PIL import Image from transformers import BeitConfig, DPTConfig, DPTForDepthEstimation, DPTImageProcessor from transformers.utils import logging logging.set_verbosity_info() logger = logging.get_logger(__name__) def get_dpt_config(model_name): hidden_size = 768 num_hidden_layers = 12 num_attention_heads = 12 intermediate_size = 3072 out_features = ["stage3", "stage6", "stage9", "stage12"] # beit-base-384 uses [2, 5, 8, 11] if "large" in model_name: hidden_size = 1024 num_hidden_layers = 24 num_attention_heads = 16 intermediate_size = 4096 out_features = ["stage6", "stage12", "stage18", "stage24"] # beit-large-512 uses [5, 11, 17, 23] if "512" in model_name: image_size = 512 elif "384" in model_name: image_size = 384 else: raise ValueError("Model not supported") backbone_config = BeitConfig( image_size=image_size, num_hidden_layers=num_hidden_layers, hidden_size=hidden_size, intermediate_size=intermediate_size, num_attention_heads=num_attention_heads, use_relative_position_bias=True, reshape_hidden_states=False, out_features=out_features, ) neck_hidden_sizes = [256, 512, 1024, 1024] if "large" in model_name else [96, 192, 384, 768] config = DPTConfig(backbone_config=backbone_config, neck_hidden_sizes=neck_hidden_sizes) return config, image_size # here we list all keys to be renamed (original name on the left, our name on the right) def create_rename_keys(config): rename_keys = [] # fmt: off # stem rename_keys.append(("pretrained.model.cls_token", "backbone.embeddings.cls_token")) rename_keys.append(("pretrained.model.patch_embed.proj.weight", "backbone.embeddings.patch_embeddings.projection.weight")) rename_keys.append(("pretrained.model.patch_embed.proj.bias", "backbone.embeddings.patch_embeddings.projection.bias")) # Transfomer encoder for i in range(config.backbone_config.num_hidden_layers): rename_keys.append((f"pretrained.model.blocks.{i}.gamma_1", f"backbone.encoder.layer.{i}.lambda_1")) rename_keys.append((f"pretrained.model.blocks.{i}.gamma_2", f"backbone.encoder.layer.{i}.lambda_2")) rename_keys.append((f"pretrained.model.blocks.{i}.norm1.weight", f"backbone.encoder.layer.{i}.layernorm_before.weight")) rename_keys.append((f"pretrained.model.blocks.{i}.norm1.bias", f"backbone.encoder.layer.{i}.layernorm_before.bias")) rename_keys.append((f"pretrained.model.blocks.{i}.norm2.weight", f"backbone.encoder.layer.{i}.layernorm_after.weight")) rename_keys.append((f"pretrained.model.blocks.{i}.norm2.bias", f"backbone.encoder.layer.{i}.layernorm_after.bias")) rename_keys.append((f"pretrained.model.blocks.{i}.mlp.fc1.weight", f"backbone.encoder.layer.{i}.intermediate.dense.weight")) rename_keys.append((f"pretrained.model.blocks.{i}.mlp.fc1.bias", f"backbone.encoder.layer.{i}.intermediate.dense.bias")) rename_keys.append((f"pretrained.model.blocks.{i}.mlp.fc2.weight", f"backbone.encoder.layer.{i}.output.dense.weight")) rename_keys.append((f"pretrained.model.blocks.{i}.mlp.fc2.bias", f"backbone.encoder.layer.{i}.output.dense.bias")) rename_keys.append((f"pretrained.model.blocks.{i}.attn.proj.weight", f"backbone.encoder.layer.{i}.attention.output.dense.weight")) rename_keys.append((f"pretrained.model.blocks.{i}.attn.proj.bias", f"backbone.encoder.layer.{i}.attention.output.dense.bias")) rename_keys.append((f"pretrained.model.blocks.{i}.attn.relative_position_bias_table", f"backbone.encoder.layer.{i}.attention.attention.relative_position_bias.relative_position_bias_table")) rename_keys.append((f"pretrained.model.blocks.{i}.attn.relative_position_index", f"backbone.encoder.layer.{i}.attention.attention.relative_position_bias.relative_position_index")) # activation postprocessing (readout projections + resize blocks) for i in range(4): rename_keys.append((f"pretrained.act_postprocess{i+1}.0.project.0.weight", f"neck.reassemble_stage.readout_projects.{i}.0.weight")) rename_keys.append((f"pretrained.act_postprocess{i+1}.0.project.0.bias", f"neck.reassemble_stage.readout_projects.{i}.0.bias")) rename_keys.append((f"pretrained.act_postprocess{i+1}.3.weight", f"neck.reassemble_stage.layers.{i}.projection.weight")) rename_keys.append((f"pretrained.act_postprocess{i+1}.3.bias", f"neck.reassemble_stage.layers.{i}.projection.bias")) if i != 2: rename_keys.append((f"pretrained.act_postprocess{i+1}.4.weight", f"neck.reassemble_stage.layers.{i}.resize.weight")) rename_keys.append((f"pretrained.act_postprocess{i+1}.4.bias", f"neck.reassemble_stage.layers.{i}.resize.bias")) # refinenet (tricky here) mapping = {1:3, 2:2, 3:1, 4:0} for i in range(1, 5): j = mapping[i] rename_keys.append((f"scratch.refinenet{i}.out_conv.weight", f"neck.fusion_stage.layers.{j}.projection.weight")) rename_keys.append((f"scratch.refinenet{i}.out_conv.bias", f"neck.fusion_stage.layers.{j}.projection.bias")) rename_keys.append((f"scratch.refinenet{i}.resConfUnit1.conv1.weight", f"neck.fusion_stage.layers.{j}.residual_layer1.convolution1.weight")) rename_keys.append((f"scratch.refinenet{i}.resConfUnit1.conv1.bias", f"neck.fusion_stage.layers.{j}.residual_layer1.convolution1.bias")) rename_keys.append((f"scratch.refinenet{i}.resConfUnit1.conv2.weight", f"neck.fusion_stage.layers.{j}.residual_layer1.convolution2.weight")) rename_keys.append((f"scratch.refinenet{i}.resConfUnit1.conv2.bias", f"neck.fusion_stage.layers.{j}.residual_layer1.convolution2.bias")) rename_keys.append((f"scratch.refinenet{i}.resConfUnit2.conv1.weight", f"neck.fusion_stage.layers.{j}.residual_layer2.convolution1.weight")) rename_keys.append((f"scratch.refinenet{i}.resConfUnit2.conv1.bias", f"neck.fusion_stage.layers.{j}.residual_layer2.convolution1.bias")) rename_keys.append((f"scratch.refinenet{i}.resConfUnit2.conv2.weight", f"neck.fusion_stage.layers.{j}.residual_layer2.convolution2.weight")) rename_keys.append((f"scratch.refinenet{i}.resConfUnit2.conv2.bias", f"neck.fusion_stage.layers.{j}.residual_layer2.convolution2.bias")) # scratch convolutions for i in range(4): rename_keys.append((f"scratch.layer{i+1}_rn.weight", f"neck.convs.{i}.weight")) # head for i in range(0, 5, 2): rename_keys.append((f"scratch.output_conv.{i}.weight", f"head.head.{i}.weight")) rename_keys.append((f"scratch.output_conv.{i}.bias", f"head.head.{i}.bias")) return rename_keys def remove_ignore_keys_(state_dict): ignore_keys = ["pretrained.model.head.weight", "pretrained.model.head.bias"] for k in ignore_keys: state_dict.pop(k, None) # we split up the matrix of each encoder layer into queries, keys and values def read_in_q_k_v(state_dict, config): hidden_size = config.backbone_config.hidden_size for i in range(config.backbone_config.num_hidden_layers): # read in weights + bias of input projection layer (in original implementation, this is a single matrix + bias) in_proj_weight = state_dict.pop(f"pretrained.model.blocks.{i}.attn.qkv.weight") q_bias = state_dict.pop(f"pretrained.model.blocks.{i}.attn.q_bias") v_bias = state_dict.pop(f"pretrained.model.blocks.{i}.attn.v_bias") # next, add query, keys and values (in that order) to the state dict state_dict[f"backbone.encoder.layer.{i}.attention.attention.query.weight"] = in_proj_weight[:hidden_size, :] state_dict[f"backbone.encoder.layer.{i}.attention.attention.query.bias"] = q_bias state_dict[f"backbone.encoder.layer.{i}.attention.attention.key.weight"] = in_proj_weight[ hidden_size : hidden_size * 2, : ] state_dict[f"backbone.encoder.layer.{i}.attention.attention.value.weight"] = in_proj_weight[-hidden_size:, :] state_dict[f"backbone.encoder.layer.{i}.attention.attention.value.bias"] = v_bias def rename_key(dct, old, new): val = dct.pop(old) dct[new] = val # We will verify our results on an image of cute cats def prepare_img(): url = "http://images.cocodataset.org/val2017/000000039769.jpg" im = Image.open(requests.get(url, stream=True).raw) return im @torch.no_grad() def convert_dpt_checkpoint(model_name, pytorch_dump_folder_path, push_to_hub): """ Copy/paste/tweak model's weights to our DPT structure. """ name_to_url = { "dpt-beit-large-512": "https://github.com/isl-org/MiDaS/releases/download/v3_1/dpt_beit_large_512.pt", "dpt-beit-large-384": "https://github.com/isl-org/MiDaS/releases/download/v3_1/dpt_beit_large_384.pt", "dpt-beit-base-384": "https://github.com/isl-org/MiDaS/releases/download/v3_1/dpt_beit_base_384.pt", } # define DPT configuration based on URL checkpoint_url = name_to_url[model_name] config, image_size = get_dpt_config(model_name) # load original state_dict from URL state_dict = torch.hub.load_state_dict_from_url(checkpoint_url, map_location="cpu") # remove certain keys remove_ignore_keys_(state_dict) # rename keys rename_keys = create_rename_keys(config) for src, dest in rename_keys: rename_key(state_dict, src, dest) # read in qkv matrices read_in_q_k_v(state_dict, config) # load HuggingFace model model = DPTForDepthEstimation(config) missing_keys, unexpected_keys = model.load_state_dict(state_dict, strict=False) print("Missing keys:", missing_keys) print("Unexpected keys:", unexpected_keys) assert missing_keys == [] # assert unexpected_keys == ["pretrained.model.fc_norm.weight", "pretrained.model.fc_norm.bias"] model.eval() # Check outputs on an image # We set `keep_aspect_ratio=False` as our current BEiT does not support arbitrary window sizes processor = DPTImageProcessor( size={"height": image_size, "width": image_size}, keep_aspect_ratio=False, ensure_multiple_of=32 ) image = prepare_img() pixel_values = processor(image, return_tensors="pt").pixel_values print("First values of pixel values:", pixel_values[0, 0, :3, :3]) print("Mean of pixel values:", pixel_values.mean().item()) print("Shape of pixel values:", pixel_values.shape) import requests from PIL import Image from torchvision import transforms url = "http://images.cocodataset.org/val2017/000000039769.jpg" image = Image.open(requests.get(url, stream=True).raw) transforms = transforms.Compose( [ transforms.Resize((image_size, image_size)), transforms.ToTensor(), ] ) pixel_values = transforms(image).unsqueeze(0) # forward pass with torch.no_grad(): outputs = model(pixel_values) predicted_depth = outputs.predicted_depth print("Shape of predicted depth:", predicted_depth.shape) print("First values of predicted depth:", predicted_depth[0, :3, :3]) # assert logits # TODO there's still a small difference with the original logits if model_name == "dpt-beit-large-512": # OK, checked expected_shape = torch.Size([1, 512, 512]) expected_slice = torch.tensor( [[2804.6260, 2792.5708, 2812.9263], [2772.0288, 2780.1118, 2796.2529], [2748.1094, 2766.6558, 2766.9834]] ) elif model_name == "dpt-beit-large-384": # OK, checked expected_shape = torch.Size([1, 384, 384]) expected_slice = torch.tensor( [[1783.2273, 1780.5729, 1792.6453], [1759.9817, 1765.5359, 1778.5002], [1739.1633, 1754.7903, 1757.1990]], ) elif model_name == "dpt-beit-base-384": # OK, checked expected_shape = torch.Size([1, 384, 384]) expected_slice = torch.tensor( [[2898.4482, 2891.3750, 2904.8079], [2858.6685, 2877.2615, 2894.4507], [2842.1235, 2854.1023, 2861.6328]], ) assert predicted_depth.shape == torch.Size(expected_shape) assert torch.allclose(predicted_depth[0, :3, :3], expected_slice) print("Looks ok!") if pytorch_dump_folder_path is not None: Path(pytorch_dump_folder_path).mkdir(exist_ok=True) print(f"Saving model and processor to {pytorch_dump_folder_path}") model.save_pretrained(pytorch_dump_folder_path) processor.save_pretrained(pytorch_dump_folder_path) if push_to_hub: print("Pushing model and processor to hub...") model.push_to_hub(repo_id=f"nielsr/{model_name}") processor.push_to_hub(repo_id=f"nielsr/{model_name}") if __name__ == "__main__": parser = argparse.ArgumentParser() # Required parameters parser.add_argument( "--model_name", default="dpt-beit-large-512", type=str, choices=["dpt-beit-large-512", "dpt-beit-large-384", "dpt-beit-base-384"], help="Name of the model you'd like to convert.", ) parser.add_argument( "--pytorch_dump_folder_path", default=None, type=str, help="Path to the output PyTorch model directory.", ) parser.add_argument( "--push_to_hub", action="store_true", help="Whether to push the model to the hub after conversion.", ) args = parser.parse_args() convert_dpt_checkpoint(args.model_name, args.pytorch_dump_folder_path, args.push_to_hub)

transformers/src/transformers/models/dpt/convert_dpt_beit_to_hf.py/0

{ "file_path": "transformers/src/transformers/models/dpt/convert_dpt_beit_to_hf.py", "repo_id": "transformers", "token_count": 5894 }

85

# coding=utf-8 # Copyright 2023 The HuggingFace Inc. team. All rights reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. """Image processor class for EfficientNet.""" from typing import Dict, List, Optional, Union import numpy as np from ...image_processing_utils import BaseImageProcessor, BatchFeature, get_size_dict from ...image_transforms import rescale, resize, to_channel_dimension_format from ...image_utils import ( IMAGENET_STANDARD_MEAN, IMAGENET_STANDARD_STD, ChannelDimension, ImageInput, PILImageResampling, infer_channel_dimension_format, is_scaled_image, make_list_of_images, to_numpy_array, valid_images, validate_kwargs, validate_preprocess_arguments, ) from ...utils import TensorType, is_vision_available, logging if is_vision_available(): import PIL logger = logging.get_logger(__name__) class EfficientNetImageProcessor(BaseImageProcessor): r""" Constructs a EfficientNet image processor. Args: do_resize (`bool`, *optional*, defaults to `True`): Whether to resize the image's (height, width) dimensions to the specified `size`. Can be overridden by `do_resize` in `preprocess`. size (`Dict[str, int]` *optional*, defaults to `{"height": 346, "width": 346}`): Size of the image after `resize`. Can be overridden by `size` in `preprocess`. resample (`PILImageResampling` filter, *optional*, defaults to 0): Resampling filter to use if resizing the image. Can be overridden by `resample` in `preprocess`. do_center_crop (`bool`, *optional*, defaults to `False`): Whether to center crop the image. If the input size is smaller than `crop_size` along any edge, the image is padded with 0's and then center cropped. Can be overridden by `do_center_crop` in `preprocess`. crop_size (`Dict[str, int]`, *optional*, defaults to `{"height": 289, "width": 289}`): Desired output size when applying center-cropping. Can be overridden by `crop_size` in `preprocess`. rescale_factor (`int` or `float`, *optional*, defaults to `1/255`): Scale factor to use if rescaling the image. Can be overridden by the `rescale_factor` parameter in the `preprocess` method. rescale_offset (`bool`, *optional*, defaults to `False`): Whether to rescale the image between [-scale_range, scale_range] instead of [0, scale_range]. Can be overridden by the `rescale_factor` parameter in the `preprocess` method. do_rescale (`bool`, *optional*, defaults to `True`): Whether to rescale the image by the specified scale `rescale_factor`. Can be overridden by the `do_rescale` parameter in the `preprocess` method. do_normalize (`bool`, *optional*, defaults to `True`): Whether to normalize the image. Can be overridden by the `do_normalize` parameter in the `preprocess` method. image_mean (`float` or `List[float]`, *optional*, defaults to `IMAGENET_STANDARD_MEAN`): Mean to use if normalizing the image. This is a float or list of floats the length of the number of channels in the image. Can be overridden by the `image_mean` parameter in the `preprocess` method. image_std (`float` or `List[float]`, *optional*, defaults to `IMAGENET_STANDARD_STD`): Standard deviation to use if normalizing the image. This is a float or list of floats the length of the number of channels in the image. Can be overridden by the `image_std` parameter in the `preprocess` method. include_top (`bool`, *optional*, defaults to `True`): Whether to rescale the image again. Should be set to True if the inputs are used for image classification. """ model_input_names = ["pixel_values"] def __init__( self, do_resize: bool = True, size: Dict[str, int] = None, resample: PILImageResampling = PIL.Image.NEAREST, do_center_crop: bool = False, crop_size: Dict[str, int] = None, rescale_factor: Union[int, float] = 1 / 255, rescale_offset: bool = False, do_rescale: bool = True, do_normalize: bool = True, image_mean: Optional[Union[float, List[float]]] = None, image_std: Optional[Union[float, List[float]]] = None, include_top: bool = True, **kwargs, ) -> None: super().__init__(**kwargs) size = size if size is not None else {"height": 346, "width": 346} size = get_size_dict(size) crop_size = crop_size if crop_size is not None else {"height": 289, "width": 289} crop_size = get_size_dict(crop_size, param_name="crop_size") self.do_resize = do_resize self.size = size self.resample = resample self.do_center_crop = do_center_crop self.crop_size = crop_size self.do_rescale = do_rescale self.rescale_factor = rescale_factor self.rescale_offset = rescale_offset self.do_normalize = do_normalize self.image_mean = image_mean if image_mean is not None else IMAGENET_STANDARD_MEAN self.image_std = image_std if image_std is not None else IMAGENET_STANDARD_STD self.include_top = include_top self._valid_processor_keys = [ "images", "do_resize", "size", "resample", "do_center_crop", "crop_size", "do_rescale", "rescale_factor", "rescale_offset", "do_normalize", "image_mean", "image_std", "include_top", "return_tensors", "data_format", "input_data_format", ] # Copied from transformers.models.vit.image_processing_vit.ViTImageProcessor.resize with PILImageResampling.BILINEAR->PILImageResampling.NEAREST def resize( self, image: np.ndarray, size: Dict[str, int], resample: PILImageResampling = PILImageResampling.NEAREST, data_format: Optional[Union[str, ChannelDimension]] = None, input_data_format: Optional[Union[str, ChannelDimension]] = None, **kwargs, ) -> np.ndarray: """ Resize an image to `(size["height"], size["width"])`. Args: image (`np.ndarray`): Image to resize. size (`Dict[str, int]`): Dictionary in the format `{"height": int, "width": int}` specifying the size of the output image. resample (`PILImageResampling`, *optional*, defaults to `PILImageResampling.NEAREST`): `PILImageResampling` filter to use when resizing the image e.g. `PILImageResampling.NEAREST`. data_format (`ChannelDimension` or `str`, *optional*): The channel dimension format for the output image. If unset, the channel dimension format of the input image is used. Can be one of: - `"channels_first"` or `ChannelDimension.FIRST`: image in (num_channels, height, width) format. - `"channels_last"` or `ChannelDimension.LAST`: image in (height, width, num_channels) format. - `"none"` or `ChannelDimension.NONE`: image in (height, width) format. input_data_format (`ChannelDimension` or `str`, *optional*): The channel dimension format for the input image. If unset, the channel dimension format is inferred from the input image. Can be one of: - `"channels_first"` or `ChannelDimension.FIRST`: image in (num_channels, height, width) format. - `"channels_last"` or `ChannelDimension.LAST`: image in (height, width, num_channels) format. - `"none"` or `ChannelDimension.NONE`: image in (height, width) format. Returns: `np.ndarray`: The resized image. """ size = get_size_dict(size) if "height" not in size or "width" not in size: raise ValueError(f"The `size` dictionary must contain the keys `height` and `width`. Got {size.keys()}") output_size = (size["height"], size["width"]) return resize( image, size=output_size, resample=resample, data_format=data_format, input_data_format=input_data_format, **kwargs, ) def rescale( self, image: np.ndarray, scale: Union[int, float], offset: bool = True, data_format: Optional[Union[str, ChannelDimension]] = None, input_data_format: Optional[Union[str, ChannelDimension]] = None, **kwargs, ): """ Rescale an image by a scale factor. If `offset` is `True`, the image has its values rescaled by `scale` and then offset by 1. If `scale` is 1/127.5, the image is rescaled between [-1, 1]. image = image * scale - 1 If `offset` is `False`, and `scale` is 1/255, the image is rescaled between [0, 1]. image = image * scale Args: image (`np.ndarray`): Image to rescale. scale (`int` or `float`): Scale to apply to the image. offset (`bool`, *optional*): Whether to scale the image in both negative and positive directions. data_format (`str` or `ChannelDimension`, *optional*): The channel dimension format of the image. If not provided, it will be the same as the input image. input_data_format (`ChannelDimension` or `str`, *optional*): The channel dimension format of the input image. If not provided, it will be inferred. """ rescaled_image = rescale( image, scale=scale, data_format=data_format, input_data_format=input_data_format, **kwargs ) if offset: rescaled_image = rescaled_image - 1 return rescaled_image def preprocess( self, images: ImageInput, do_resize: bool = None, size: Dict[str, int] = None, resample=None, do_center_crop: bool = None, crop_size: Dict[str, int] = None, do_rescale: bool = None, rescale_factor: float = None, rescale_offset: bool = None, do_normalize: bool = None, image_mean: Optional[Union[float, List[float]]] = None, image_std: Optional[Union[float, List[float]]] = None, include_top: bool = None, return_tensors: Optional[Union[str, TensorType]] = None, data_format: ChannelDimension = ChannelDimension.FIRST, input_data_format: Optional[Union[str, ChannelDimension]] = None, **kwargs, ) -> PIL.Image.Image: """ Preprocess an image or batch of images. Args: images (`ImageInput`): Image to preprocess. Expects a single or batch of images with pixel values ranging from 0 to 255. If passing in images with pixel values between 0 and 1, set `do_rescale=False`. do_resize (`bool`, *optional*, defaults to `self.do_resize`): Whether to resize the image. size (`Dict[str, int]`, *optional*, defaults to `self.size`): Size of the image after `resize`. resample (`PILImageResampling`, *optional*, defaults to `self.resample`): PILImageResampling filter to use if resizing the image Only has an effect if `do_resize` is set to `True`. do_center_crop (`bool`, *optional*, defaults to `self.do_center_crop`): Whether to center crop the image. crop_size (`Dict[str, int]`, *optional*, defaults to `self.crop_size`): Size of the image after center crop. If one edge the image is smaller than `crop_size`, it will be padded with zeros and then cropped do_rescale (`bool`, *optional*, defaults to `self.do_rescale`): Whether to rescale the image values between [0 - 1]. rescale_factor (`float`, *optional*, defaults to `self.rescale_factor`): Rescale factor to rescale the image by if `do_rescale` is set to `True`. rescale_offset (`bool`, *optional*, defaults to `self.rescale_offset`): Whether to rescale the image between [-scale_range, scale_range] instead of [0, scale_range]. do_normalize (`bool`, *optional*, defaults to `self.do_normalize`): Whether to normalize the image. image_mean (`float` or `List[float]`, *optional*, defaults to `self.image_mean`): Image mean. image_std (`float` or `List[float]`, *optional*, defaults to `self.image_std`): Image standard deviation. include_top (`bool`, *optional*, defaults to `self.include_top`): Rescales the image again for image classification if set to True. return_tensors (`str` or `TensorType`, *optional*): The type of tensors to return. Can be one of: - `None`: Return a list of `np.ndarray`. - `TensorType.TENSORFLOW` or `'tf'`: Return a batch of type `tf.Tensor`. - `TensorType.PYTORCH` or `'pt'`: Return a batch of type `torch.Tensor`. - `TensorType.NUMPY` or `'np'`: Return a batch of type `np.ndarray`. - `TensorType.JAX` or `'jax'`: Return a batch of type `jax.numpy.ndarray`. data_format (`ChannelDimension` or `str`, *optional*, defaults to `ChannelDimension.FIRST`): The channel dimension format for the output image. Can be one of: - `ChannelDimension.FIRST`: image in (num_channels, height, width) format. - `ChannelDimension.LAST`: image in (height, width, num_channels) format. input_data_format (`ChannelDimension` or `str`, *optional*): The channel dimension format for the input image. If unset, the channel dimension format is inferred from the input image. Can be one of: - `"channels_first"` or `ChannelDimension.FIRST`: image in (num_channels, height, width) format. - `"channels_last"` or `ChannelDimension.LAST`: image in (height, width, num_channels) format. - `"none"` or `ChannelDimension.NONE`: image in (height, width) format. """ do_resize = do_resize if do_resize is not None else self.do_resize resample = resample if resample is not None else self.resample do_center_crop = do_center_crop if do_center_crop is not None else self.do_center_crop do_rescale = do_rescale if do_rescale is not None else self.do_rescale rescale_factor = rescale_factor if rescale_factor is not None else self.rescale_factor rescale_offset = rescale_offset if rescale_offset is not None else self.rescale_offset do_normalize = do_normalize if do_normalize is not None else self.do_normalize image_mean = image_mean if image_mean is not None else self.image_mean image_std = image_std if image_std is not None else self.image_std include_top = include_top if include_top is not None else self.include_top size = size if size is not None else self.size size = get_size_dict(size) crop_size = crop_size if crop_size is not None else self.crop_size crop_size = get_size_dict(crop_size, param_name="crop_size") images = make_list_of_images(images) validate_kwargs(captured_kwargs=kwargs.keys(), valid_processor_keys=self._valid_processor_keys) if not valid_images(images): raise ValueError( "Invalid image type. Must be of type PIL.Image.Image, numpy.ndarray, " "torch.Tensor, tf.Tensor or jax.ndarray." ) validate_preprocess_arguments( do_rescale=do_rescale, rescale_factor=rescale_factor, do_normalize=do_normalize, image_mean=image_mean, image_std=image_std, do_center_crop=do_center_crop, crop_size=crop_size, do_resize=do_resize, size=size, resample=resample, ) # All transformations expect numpy arrays. images = [to_numpy_array(image) for image in images] if is_scaled_image(images[0]) and do_rescale: logger.warning_once( "It looks like you are trying to rescale already rescaled images. If the input" " images have pixel values between 0 and 1, set `do_rescale=False` to avoid rescaling them again." ) if input_data_format is None: # We assume that all images have the same channel dimension format. input_data_format = infer_channel_dimension_format(images[0]) if do_resize: images = [ self.resize(image=image, size=size, resample=resample, input_data_format=input_data_format) for image in images ] if do_center_crop: images = [ self.center_crop(image=image, size=crop_size, input_data_format=input_data_format) for image in images ] if do_rescale: images = [ self.rescale( image=image, scale=rescale_factor, offset=rescale_offset, input_data_format=input_data_format ) for image in images ] if do_normalize: images = [ self.normalize(image=image, mean=image_mean, std=image_std, input_data_format=input_data_format) for image in images ] if include_top: images = [ self.normalize(image=image, mean=0, std=image_std, input_data_format=input_data_format) for image in images ] images = [ to_channel_dimension_format(image, data_format, input_channel_dim=input_data_format) for image in images ] data = {"pixel_values": images} return BatchFeature(data=data, tensor_type=return_tensors)

transformers/src/transformers/models/efficientnet/image_processing_efficientnet.py/0

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86

# coding=utf-8 # Copyright 2020 The HuggingFace Inc. team. # Copyright (c) 2018, NVIDIA CORPORATION. All rights reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. from ...configuration_utils import PretrainedConfig from ...utils import logging logger = logging.get_logger(__name__) class EncoderDecoderConfig(PretrainedConfig): r""" [`EncoderDecoderConfig`] is the configuration class to store the configuration of a [`EncoderDecoderModel`]. It is used to instantiate an Encoder Decoder model according to the specified arguments, defining the encoder and decoder configs. Configuration objects inherit from [`PretrainedConfig`] and can be used to control the model outputs. Read the documentation from [`PretrainedConfig`] for more information. Args: kwargs (*optional*): Dictionary of keyword arguments. Notably: - **encoder** ([`PretrainedConfig`], *optional*) -- An instance of a configuration object that defines the encoder config. - **decoder** ([`PretrainedConfig`], *optional*) -- An instance of a configuration object that defines the decoder config. Examples: ```python >>> from transformers import BertConfig, EncoderDecoderConfig, EncoderDecoderModel >>> # Initializing a BERT google-bert/bert-base-uncased style configuration >>> config_encoder = BertConfig() >>> config_decoder = BertConfig() >>> config = EncoderDecoderConfig.from_encoder_decoder_configs(config_encoder, config_decoder) >>> # Initializing a Bert2Bert model (with random weights) from the google-bert/bert-base-uncased style configurations >>> model = EncoderDecoderModel(config=config) >>> # Accessing the model configuration >>> config_encoder = model.config.encoder >>> config_decoder = model.config.decoder >>> # set decoder config to causal lm >>> config_decoder.is_decoder = True >>> config_decoder.add_cross_attention = True >>> # Saving the model, including its configuration >>> model.save_pretrained("my-model") >>> # loading model and config from pretrained folder >>> encoder_decoder_config = EncoderDecoderConfig.from_pretrained("my-model") >>> model = EncoderDecoderModel.from_pretrained("my-model", config=encoder_decoder_config) ```""" model_type = "encoder-decoder" is_composition = True def __init__(self, **kwargs): super().__init__(**kwargs) assert ( "encoder" in kwargs and "decoder" in kwargs ), "Config has to be initialized with encoder and decoder config" encoder_config = kwargs.pop("encoder") encoder_model_type = encoder_config.pop("model_type") decoder_config = kwargs.pop("decoder") decoder_model_type = decoder_config.pop("model_type") from ..auto.configuration_auto import AutoConfig self.encoder = AutoConfig.for_model(encoder_model_type, **encoder_config) self.decoder = AutoConfig.for_model(decoder_model_type, **decoder_config) self.is_encoder_decoder = True @classmethod def from_encoder_decoder_configs( cls, encoder_config: PretrainedConfig, decoder_config: PretrainedConfig, **kwargs ) -> PretrainedConfig: r""" Instantiate a [`EncoderDecoderConfig`] (or a derived class) from a pre-trained encoder model configuration and decoder model configuration. Returns: [`EncoderDecoderConfig`]: An instance of a configuration object """ logger.info("Set `config.is_decoder=True` and `config.add_cross_attention=True` for decoder_config") decoder_config.is_decoder = True decoder_config.add_cross_attention = True return cls(encoder=encoder_config.to_dict(), decoder=decoder_config.to_dict(), **kwargs)

transformers/src/transformers/models/encoder_decoder/configuration_encoder_decoder.py/0

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# coding=utf-8 # Copyright 2022 Meta and The HuggingFace Inc. team. All rights reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. """ PyTorch ESM model.""" from __future__ import annotations import os from typing import Optional, Tuple, Union import numpy as np import tensorflow as tf from ...file_utils import add_code_sample_docstrings, add_start_docstrings, add_start_docstrings_to_model_forward from ...modeling_tf_outputs import ( TFBaseModelOutputWithPastAndCrossAttentions, TFBaseModelOutputWithPoolingAndCrossAttentions, TFMaskedLMOutput, TFSequenceClassifierOutput, TFTokenClassifierOutput, ) from ...modeling_tf_utils import ( TFMaskedLanguageModelingLoss, TFModelInputType, TFPreTrainedModel, TFSequenceClassificationLoss, TFTokenClassificationLoss, get_initializer, keras, shape_list, unpack_inputs, ) from ...tf_utils import check_embeddings_within_bounds, stable_softmax from ...utils import logging from .configuration_esm import EsmConfig logger = logging.get_logger(__name__) _CHECKPOINT_FOR_DOC = "facebook/esm2_t6_8M_UR50D" _CONFIG_FOR_DOC = "EsmConfig" TF_ESM_PRETRAINED_MODEL_ARCHIVE_LIST = [ "facebook/esm2_t6_8M_UR50D", "facebook/esm2_t12_35M_UR50D", # This is not a complete list of all ESM models! # See all ESM models at https://huggingface.co/models?filter=esm ] def rotate_half(x): x1, x2 = tf.split(x, 2, axis=-1) return tf.concat((-x2, x1), axis=-1) def apply_rotary_pos_emb(x, cos, sin): cos = cos[:, :, : tf.shape(x)[-2], :] sin = sin[:, :, : tf.shape(x)[-2], :] return (x * cos) + (rotate_half(x) * sin) def symmetrize(x): "Make layer symmetric in final two dimensions, used for contact prediction." return x + tf.linalg.matrix_transpose(x) # Transposes last two dimensions only def average_product_correct(x): "Perform average product correct, used for contact prediction." a1 = tf.reduce_sum(x, -1, keepdims=True) a2 = tf.reduce_sum(x, -2, keepdims=True) a12 = tf.reduce_sum(x, (-1, -2), keepdims=True) avg = a1 * a2 avg = avg / a12 normalized = x - avg return normalized class TFRotaryEmbedding(keras.layers.Layer): """ Rotary position embeddings based on those in [RoFormer](https://huggingface.co/docs/transformers/model_doc/roformer). Query and keys are transformed by rotation matrices which depend on their relative positions. """ def __init__(self, dim: int, name=None): super().__init__(name=name) # Matt: The PyTorch version of this layer does a lot of work to cache values, but we just rely on TF compilation # and/or XLA to sort out constants like that. It actually may not seem like this layer needs to be stateful at # all when we benefit from TF compilation, but it does. The reason is that self.inv_freq is a buffer in the # original implementation, but all the shared ESM checkpoints were trained with fp16 params. This means that # the inv_freq tensor was stored as a float16, and we need to replicate those lower-precision values or our # models give different outputs from the original. self.dim = dim def build(self, input_shape): super().build(input_shape) self.inv_freq = self.add_weight( "inv_freq", shape=(self.dim // 2,), dtype=tf.float32, initializer=get_initializer(1.0), trainable=False ) self.inv_freq.assign( 1.0 / (10000 ** (tf.range(start=0, limit=self.dim, delta=2, dtype=tf.float32) / self.dim)) ) def _compute_cos_sin(self, x, seq_dimension=2): seq_len = tf.shape(x)[seq_dimension] t = tf.range(seq_len, dtype=self.inv_freq.dtype) freqs = tf.einsum("i, j -> ij", t, self.inv_freq) # Outer multiplication emb = tf.concat((freqs, freqs), axis=-1)[None, None, :, :] return tf.cos(emb), tf.sin(emb) def call(self, q: tf.Tensor, k: tf.Tensor) -> Tuple[tf.Tensor, tf.Tensor]: cos_emb, sin_emb = self._compute_cos_sin(k, seq_dimension=-2) return ( apply_rotary_pos_emb(q, cos_emb, sin_emb), apply_rotary_pos_emb(k, cos_emb, sin_emb), ) class TFEsmContactPredictionHead(keras.layers.Layer): """Performs symmetrization, apc, and computes a logistic regression on the output features""" def __init__( self, in_features: int, bias=True, eos_idx: int = 2, name=None, ): super().__init__(name=name) self.eos_idx = eos_idx self.in_features = in_features self.regression = keras.layers.Dense(1, use_bias=bias, activation="sigmoid", name="regression") def build(self, input_shape=None): if self.built: return self.built = True if getattr(self, "regression", None) is not None: with tf.name_scope(self.regression.name): self.regression.build((None, self.in_features)) def call(self, tokens, attentions): # remove eos token attentions eos_mask = tf.cast(tokens != self.eos_idx, attentions.dtype) eos_mask = tf.expand_dims(eos_mask, 1) * tf.expand_dims(eos_mask, 2) attentions = attentions * eos_mask[:, None, None, :, :] attentions = attentions[..., :-1, :-1] # remove cls token attentions attentions = attentions[..., 1:, 1:] batch_size, layers, heads, seqlen, _ = shape_list(attentions) attentions = tf.reshape(attentions, (batch_size, layers * heads, seqlen, seqlen)) # features: batch x channels x tokens x tokens (symmetric) attentions = average_product_correct(symmetrize(attentions)) attentions = tf.transpose(attentions, perm=(0, 2, 3, 1)) return tf.squeeze(self.regression(attentions), 3) class TFEsmEmbeddings(keras.layers.Layer): """ Same as BertEmbeddings with a tiny tweak for positional embeddings indexing. """ def __init__(self, config, name=None): super().__init__(name=name) self.word_embeddings = keras.layers.Embedding( config.vocab_size, config.hidden_size, embeddings_initializer=get_initializer(config.initializer_range), name="word_embeddings", ) self.position_embeddings = keras.layers.Embedding( config.max_position_embeddings, config.hidden_size, embeddings_initializer=get_initializer(config.initializer_range), name="position_embeddings", ) if config.emb_layer_norm_before: self.layer_norm = keras.layers.LayerNormalization(epsilon=config.layer_norm_eps, name="layer_norm") else: self.layer_norm = None # Matt: I think this line was copied incorrectly from BERT, disabling for now # self.dropout = Dropout(config.hidden_dropout_prob) self.position_embedding_type = getattr(config, "position_embedding_type", "absolute") self.position_ids = tf.range(config.max_position_embeddings)[None, :] self.padding_idx = config.pad_token_id self.token_dropout = config.token_dropout self.mask_token_id = config.mask_token_id self.config = config def call( self, input_ids=None, attention_mask=None, position_ids=None, inputs_embeds=None, past_key_values_length=0 ): if position_ids is None: if input_ids is not None: # Create the position ids from the input token ids. Any padded tokens remain padded. position_ids = create_position_ids_from_input_ids(input_ids, self.padding_idx, past_key_values_length) else: position_ids = self.create_position_ids_from_inputs_embeds(inputs_embeds) if inputs_embeds is None: check_embeddings_within_bounds(input_ids, self.config.vocab_size) inputs_embeds = self.word_embeddings(input_ids) # Note that if we want to support ESM-1 (not 1b!) in future then we need to support an # embedding_scale factor here. embeddings = inputs_embeds # Matt: ESM has the option to handle masking in MLM in a slightly unusual way. If the token_dropout # flag is False then it is handled in the same was as BERT/RoBERTa. If it is set to True, however, # masked tokens are treated as if they were selected for input dropout and zeroed out. # This "mask-dropout" is compensated for when masked tokens are not present, by scaling embeddings by # a factor of (fraction of unmasked tokens during training) / (fraction of unmasked tokens in sample). # This is analogous to the way that dropout layers scale down outputs during evaluation when not # actually dropping out values (or, equivalently, scale up their un-dropped outputs in training). if self.token_dropout: embeddings = tf.where((input_ids == self.mask_token_id)[:, :, None], 0.0, embeddings) mask_ratio_train = 0.15 * 0.8 # Hardcoded as the ratio used in all ESM model training runs src_lengths = tf.cast(tf.reduce_sum(attention_mask, axis=-1), tf.float32) masked_tokens = input_ids == self.mask_token_id mask_ratio_observed = tf.math.count_nonzero(masked_tokens, dtype=tf.float32, axis=-1) / src_lengths embeddings = embeddings * (1 - mask_ratio_train) / (1 - mask_ratio_observed)[:, None, None] if self.position_embedding_type == "absolute": position_embeddings = self.position_embeddings(position_ids) embeddings += position_embeddings if self.layer_norm is not None: embeddings = self.layer_norm(embeddings) if attention_mask is not None: embeddings = embeddings * tf.cast(tf.expand_dims(attention_mask, -1), embeddings.dtype) # Matt: I think this line was copied incorrectly from BERT, disabling it for now. # embeddings = self.dropout(embeddings) return embeddings def create_position_ids_from_inputs_embeds(self, inputs_embeds): """ We are provided embeddings directly. We cannot infer which are padded so just generate sequential position ids. Args: inputs_embeds: tf.Tensor Returns: tf.Tensor """ input_shape = shape_list(inputs_embeds)[:-1] sequence_length = input_shape[1] position_ids = tf.range( start=self.padding_idx + 1, limit=sequence_length + self.padding_idx + 1, dtype=tf.int64 ) return tf.broadcast_to(tf.expand_dims(position_ids, 0), input_shape) def build(self, input_shape=None): if self.built: return self.built = True if getattr(self, "word_embeddings", None) is not None: with tf.name_scope(self.word_embeddings.name): self.word_embeddings.build(None) if getattr(self, "position_embeddings", None) is not None: with tf.name_scope(self.position_embeddings.name): self.position_embeddings.build(None) if getattr(self, "layer_norm", None) is not None: with tf.name_scope(self.layer_norm.name): self.layer_norm.build([None, None, self.config.hidden_size]) class TFEsmSelfAttention(keras.layers.Layer): def __init__(self, config, position_embedding_type=None, name=None): super().__init__(name=name) if config.hidden_size % config.num_attention_heads != 0 and not hasattr(config, "embedding_size"): raise ValueError( f"The hidden size ({config.hidden_size}) is not a multiple of the number of attention " f"heads ({config.num_attention_heads})" ) self.num_attention_heads = config.num_attention_heads self.attention_head_size = int(config.hidden_size / config.num_attention_heads) self.all_head_size = self.num_attention_heads * self.attention_head_size self.query = keras.layers.Dense( self.all_head_size, kernel_initializer=get_initializer(config.initializer_range), name="query" ) self.key = keras.layers.Dense( self.all_head_size, kernel_initializer=get_initializer(config.initializer_range), name="key" ) self.value = keras.layers.Dense( self.all_head_size, kernel_initializer=get_initializer(config.initializer_range), name="value" ) self.dropout = keras.layers.Dropout(config.attention_probs_dropout_prob) self.position_embedding_type = position_embedding_type or getattr( config, "position_embedding_type", "absolute" ) self.rotary_embeddings = None if self.position_embedding_type == "relative_key" or self.position_embedding_type == "relative_key_query": self.max_position_embeddings = config.max_position_embeddings self.distance_embedding = keras.layers.Embedding( 2 * config.max_position_embeddings - 1, self.attention_head_size, embeddings_initializer=get_initializer(config.initializer_range), ) elif self.position_embedding_type == "rotary": self.rotary_embeddings = TFRotaryEmbedding(dim=self.attention_head_size, name="rotary_embeddings") self.is_decoder = config.is_decoder self.config = config def transpose_for_scores(self, x: tf.Tensor) -> tf.Tensor: new_x_shape = shape_list(x)[:-1] + [self.num_attention_heads, self.attention_head_size] x = tf.reshape(x, new_x_shape) return tf.transpose(x, perm=(0, 2, 1, 3)) def call( self, hidden_states: tf.Tensor, attention_mask: tf.Tensor | None = None, head_mask: tf.Tensor | None = None, encoder_hidden_states: tf.Tensor | None = None, encoder_attention_mask: tf.Tensor | None = None, past_key_value: Tuple[Tuple[tf.Tensor]] | None = None, output_attentions: Optional[bool] = False, training: bool = False, ) -> Tuple[tf.Tensor]: mixed_query_layer = self.query(hidden_states) # If this is instantiated as a cross-attention module, the keys # and values come from an encoder; the attention mask needs to be # such that the encoder's padding tokens are not attended to. is_cross_attention = encoder_hidden_states is not None if is_cross_attention and past_key_value is not None: # reuse k,v, cross_attentions key_layer = past_key_value[0] value_layer = past_key_value[1] attention_mask = encoder_attention_mask elif is_cross_attention: key_layer = self.transpose_for_scores(self.key(encoder_hidden_states)) value_layer = self.transpose_for_scores(self.value(encoder_hidden_states)) attention_mask = encoder_attention_mask elif past_key_value is not None: key_layer = self.transpose_for_scores(self.key(hidden_states)) value_layer = self.transpose_for_scores(self.value(hidden_states)) key_layer = tf.concat([past_key_value[0], key_layer], axis=2) value_layer = tf.concat([past_key_value[1], value_layer], axis=2) else: key_layer = self.transpose_for_scores(self.key(hidden_states)) value_layer = self.transpose_for_scores(self.value(hidden_states)) query_layer = self.transpose_for_scores(mixed_query_layer) # Matt: Our BERT model (which this code was derived from) scales attention logits down by sqrt(head_dim). # ESM scales the query down by the same factor instead. Modulo numerical stability these are equivalent, # but not when rotary embeddings get involved. Therefore, we scale the query here to match the original # ESM code and fix rotary embeddings. query_layer = query_layer * self.attention_head_size**-0.5 if self.is_decoder: # if cross_attention save Tuple(tf.Tensor, tf.Tensor) of all cross attention key/value_states. # Further calls to cross_attention layer can then reuse all cross-attention # key/value_states (first "if" case) # if uni-directional self-attention (decoder) save Tuple(tf.Tensor, tf.Tensor) of # all previous decoder key/value_states. Further calls to uni-directional self-attention # can concat previous decoder key/value_states to current projected key/value_states (third "elif" case) # if encoder bi-directional self-attention `past_key_value` is always `None` past_key_value = (key_layer, value_layer) if self.position_embedding_type == "rotary": query_layer, key_layer = self.rotary_embeddings(query_layer, key_layer) # Take the dot product between "query" and "key" to get the raw attention scores. attention_scores = tf.matmul(query_layer, key_layer, transpose_b=True) if self.position_embedding_type == "relative_key" or self.position_embedding_type == "relative_key_query": seq_length = shape_list(hidden_states)[1] position_ids_l = tf.expand_dims(tf.range(seq_length, dtype=tf.int64), -1) position_ids_r = tf.expand_dims(tf.range(seq_length, dtype=tf.int64), 0) distance = position_ids_l - position_ids_r positional_embedding = self.distance_embedding(distance + self.max_position_embeddings - 1) positional_embedding = tf.cast(positional_embedding, query_layer.dtype) # fp16 compatibility if self.position_embedding_type == "relative_key": relative_position_scores = tf.einsum("bhld,lrd->bhlr", query_layer, positional_embedding) attention_scores = attention_scores + relative_position_scores elif self.position_embedding_type == "relative_key_query": relative_position_scores_query = tf.einsum("bhld,lrd->bhlr", query_layer, positional_embedding) relative_position_scores_key = tf.einsum("bhrd,lrd->bhlr", key_layer, positional_embedding) attention_scores = attention_scores + relative_position_scores_query + relative_position_scores_key if attention_mask is not None: # Apply the attention mask is (precomputed for all layers in EsmModel forward() function) attention_scores = attention_scores + attention_mask # Normalize the attention scores to probabilities. attention_probs = stable_softmax(attention_scores, axis=-1) # This is actually dropping out entire tokens to attend to, which might # seem a bit unusual, but is taken from the original Transformer paper. attention_probs = self.dropout(attention_probs, training=training) # Mask heads if we want to if head_mask is not None: attention_probs = attention_probs * head_mask context_layer = attention_probs @ value_layer context_layer = tf.transpose(context_layer, perm=(0, 2, 1, 3)) new_context_layer_shape = shape_list(context_layer)[:-2] + [self.all_head_size] context_layer = tf.reshape(context_layer, new_context_layer_shape) outputs = (context_layer, attention_probs) if output_attentions else (context_layer,) if self.is_decoder: outputs = outputs + (past_key_value,) return outputs def build(self, input_shape=None): if self.built: return self.built = True if getattr(self, "query", None) is not None: with tf.name_scope(self.query.name): self.query.build([None, None, self.config.hidden_size]) if getattr(self, "key", None) is not None: with tf.name_scope(self.key.name): self.key.build([None, None, self.config.hidden_size]) if getattr(self, "value", None) is not None: with tf.name_scope(self.value.name): self.value.build([None, None, self.config.hidden_size]) if getattr(self, "rotary_embeddings", None) is not None: with tf.name_scope(self.rotary_embeddings.name): self.rotary_embeddings.build(None) class TFEsmSelfOutput(keras.layers.Layer): def __init__(self, config, name=None): super().__init__(name=name) self.dense = keras.layers.Dense( config.hidden_size, kernel_initializer=get_initializer(config.initializer_range), name="dense" ) self.dropout = keras.layers.Dropout(config.hidden_dropout_prob) self.config = config def call(self, hidden_states, input_tensor, training=False): hidden_states = self.dense(hidden_states) hidden_states = self.dropout(hidden_states, training=training) hidden_states += input_tensor return hidden_states def build(self, input_shape=None): if self.built: return self.built = True if getattr(self, "dense", None) is not None: with tf.name_scope(self.dense.name): self.dense.build([None, None, self.config.hidden_size]) class TFEsmAttention(keras.layers.Layer): def __init__(self, config, name=None): super().__init__(name=name) self.self = TFEsmSelfAttention(config, name="self") self.output_layer = TFEsmSelfOutput(config, name="output") self.pruned_heads = set() self.LayerNorm = keras.layers.LayerNormalization(epsilon=config.layer_norm_eps, name="LayerNorm") self.config = config def prune_heads(self, heads): raise NotImplementedError def call( self, hidden_states, attention_mask=None, head_mask=None, encoder_hidden_states=None, encoder_attention_mask=None, past_key_value=None, output_attentions=False, training=False, ): hidden_states_ln = self.LayerNorm(hidden_states) self_outputs = self.self( hidden_states_ln, attention_mask, head_mask, encoder_hidden_states, encoder_attention_mask, past_key_value, output_attentions, training, ) attention_output = self.output_layer(self_outputs[0], hidden_states) outputs = (attention_output,) + self_outputs[1:] # add attentions if we output them return outputs def build(self, input_shape=None): if self.built: return self.built = True if getattr(self, "self", None) is not None: with tf.name_scope(self.self.name): self.self.build(None) if getattr(self, "output_layer", None) is not None: with tf.name_scope(self.output_layer.name): self.output_layer.build(None) if getattr(self, "LayerNorm", None) is not None: with tf.name_scope(self.LayerNorm.name): self.LayerNorm.build([None, None, self.config.hidden_size]) class TFEsmIntermediate(keras.layers.Layer): def __init__(self, config: EsmConfig, **kwargs): super().__init__(**kwargs) self.dense = keras.layers.Dense( units=config.intermediate_size, kernel_initializer=get_initializer(config.initializer_range), name="dense", ) self.config = config def call(self, hidden_states: tf.Tensor) -> tf.Tensor: hidden_states = self.dense(inputs=hidden_states) hidden_states = tf.nn.gelu(hidden_states) return hidden_states def build(self, input_shape=None): if self.built: return self.built = True if getattr(self, "dense", None) is not None: with tf.name_scope(self.dense.name): self.dense.build([None, None, self.config.hidden_size]) class TFEsmOutput(keras.layers.Layer): def __init__(self, config, name=None): super().__init__(name=name) self.dense = keras.layers.Dense( config.hidden_size, kernel_initializer=get_initializer(config.initializer_range), name="dense" ) self.dropout = keras.layers.Dropout(config.hidden_dropout_prob) self.config = config def call(self, hidden_states, input_tensor, training=False): hidden_states = self.dense(hidden_states) hidden_states = self.dropout(hidden_states, training=training) hidden_states += input_tensor return hidden_states def build(self, input_shape=None): if self.built: return self.built = True if getattr(self, "dense", None) is not None: with tf.name_scope(self.dense.name): self.dense.build([None, None, self.config.intermediate_size]) class TFEsmLayer(keras.layers.Layer): def __init__(self, config, name=None): super().__init__(name=name) self.chunk_size_feed_forward = config.chunk_size_feed_forward self.seq_len_dim = 1 self.attention = TFEsmAttention(config, name="attention") self.is_decoder = config.is_decoder self.add_cross_attention = config.add_cross_attention if self.add_cross_attention: if not self.is_decoder: raise RuntimeError(f"{self} should be used as a decoder model if cross attention is added") self.crossattention = TFEsmAttention(config) self.intermediate = TFEsmIntermediate(config, name="intermediate") self.output_layer = TFEsmOutput(config, name="output") self.LayerNorm = keras.layers.LayerNormalization(epsilon=config.layer_norm_eps, name="LayerNorm") self.config = config def call( self, hidden_states, attention_mask=None, head_mask=None, encoder_hidden_states=None, encoder_attention_mask=None, past_key_value=None, output_attentions=False, training=False, ): # decoder uni-directional self-attention cached key/values tuple is at positions 1,2 self_attn_past_key_value = past_key_value[:2] if past_key_value is not None else None self_attention_outputs = self.attention( hidden_states, attention_mask, head_mask, output_attentions=output_attentions, past_key_value=self_attn_past_key_value, training=training, ) attention_output = self_attention_outputs[0] # if decoder, the last output is tuple of self-attn cache if self.is_decoder: outputs = self_attention_outputs[1:-1] present_key_value = self_attention_outputs[-1] else: outputs = self_attention_outputs[1:] # add self attentions if we output attention weights cross_attn_present_key_value = None if self.is_decoder and encoder_hidden_states is not None: if not hasattr(self, "crossattention"): raise AttributeError( f"If `encoder_hidden_states` are passed, {self} has to be instantiated" " with cross-attention layers by setting `config.add_cross_attention=True`" ) # cross_attn cached key/values tuple is at positions 3,4 of past_key_value tuple cross_attn_past_key_value = past_key_value[-2:] if past_key_value is not None else None cross_attention_outputs = self.crossattention( attention_output, attention_mask, head_mask, encoder_hidden_states, encoder_attention_mask, cross_attn_past_key_value, output_attentions, training=training, ) attention_output = cross_attention_outputs[0] outputs = outputs + cross_attention_outputs[1:-1] # add cross attentions if we output attention weights # add cross-attn cache to positions 3,4 of present_key_value tuple cross_attn_present_key_value = cross_attention_outputs[-1] present_key_value = present_key_value + cross_attn_present_key_value layernorm_output = self.LayerNorm(attention_output) intermediate_output = self.intermediate(hidden_states=layernorm_output) layer_output = self.output_layer( hidden_states=intermediate_output, input_tensor=attention_output, training=training ) outputs = (layer_output,) + outputs # add attentions if we output them # if decoder, return the attn key/values as the last output if self.is_decoder: outputs = outputs + (present_key_value,) return outputs def build(self, input_shape=None): if self.built: return self.built = True if getattr(self, "attention", None) is not None: with tf.name_scope(self.attention.name): self.attention.build(None) if getattr(self, "intermediate", None) is not None: with tf.name_scope(self.intermediate.name): self.intermediate.build(None) if getattr(self, "output_layer", None) is not None: with tf.name_scope(self.output_layer.name): self.output_layer.build(None) if getattr(self, "LayerNorm", None) is not None: with tf.name_scope(self.LayerNorm.name): self.LayerNorm.build([None, None, self.config.hidden_size]) class TFEsmEncoder(keras.layers.Layer): def __init__(self, config, name=None): super().__init__(name=name) self.config = config self.layer = [TFEsmLayer(config, name=f"layer_._{i}") for i in range(config.num_hidden_layers)] self.emb_layer_norm_after = keras.layers.LayerNormalization( epsilon=config.layer_norm_eps, name="emb_layer_norm_after" ) def call( self, hidden_states, attention_mask=None, head_mask=None, encoder_hidden_states=None, encoder_attention_mask=None, past_key_values=None, use_cache=None, output_attentions=False, output_hidden_states=False, return_dict=True, training=False, ): all_hidden_states = () if output_hidden_states else None all_self_attentions = () if output_attentions else None all_cross_attentions = () if output_attentions and self.config.add_cross_attention else None next_decoder_cache = () if use_cache else None for i, layer_module in enumerate(self.layer): if output_hidden_states: all_hidden_states = all_hidden_states + (hidden_states,) layer_head_mask = head_mask[i] if head_mask is not None else None past_key_value = past_key_values[i] if past_key_values is not None else None layer_outputs = layer_module( hidden_states, attention_mask, layer_head_mask, encoder_hidden_states, encoder_attention_mask, past_key_value, output_attentions, training, ) hidden_states = layer_outputs[0] if use_cache: next_decoder_cache += (layer_outputs[-1],) if output_attentions: all_self_attentions = all_self_attentions + (layer_outputs[1],) if self.config.add_cross_attention: all_cross_attentions = all_cross_attentions + (layer_outputs[2],) if self.emb_layer_norm_after: hidden_states = self.emb_layer_norm_after(hidden_states) if output_hidden_states: all_hidden_states = all_hidden_states + (hidden_states,) if not return_dict: return tuple( v for v in [ hidden_states, next_decoder_cache, all_hidden_states, all_self_attentions, all_cross_attentions, ] if v is not None ) return TFBaseModelOutputWithPastAndCrossAttentions( last_hidden_state=hidden_states, past_key_values=next_decoder_cache, hidden_states=all_hidden_states, attentions=all_self_attentions, cross_attentions=all_cross_attentions, ) def build(self, input_shape=None): if self.built: return self.built = True if getattr(self, "emb_layer_norm_after", None) is not None: with tf.name_scope(self.emb_layer_norm_after.name): self.emb_layer_norm_after.build([None, None, self.config.hidden_size]) if getattr(self, "layer", None) is not None: for layer in self.layer: with tf.name_scope(layer.name): layer.build(None) # Copied from transformers.models.bert.modeling_tf_bert.TFBertPooler with Bert->Esm class TFEsmPooler(keras.layers.Layer): def __init__(self, config: EsmConfig, **kwargs): super().__init__(**kwargs) self.dense = keras.layers.Dense( units=config.hidden_size, kernel_initializer=get_initializer(config.initializer_range), activation="tanh", name="dense", ) self.config = config def call(self, hidden_states: tf.Tensor) -> tf.Tensor: # We "pool" the model by simply taking the hidden state corresponding # to the first token. first_token_tensor = hidden_states[:, 0] pooled_output = self.dense(inputs=first_token_tensor) return pooled_output def build(self, input_shape=None): if self.built: return self.built = True if getattr(self, "dense", None) is not None: with tf.name_scope(self.dense.name): self.dense.build([None, None, self.config.hidden_size]) class TFEsmPreTrainedModel(TFPreTrainedModel): """ An abstract class to handle weights initialization and a simple interface for downloading and loading pretrained models. """ config_class = EsmConfig base_model_prefix = "esm" ESM_START_DOCSTRING = r""" This model inherits from [`TFPreTrainedModel`]. Check the superclass documentation for the generic methods the library implements for all its model (such as downloading or saving, resizing the input embeddings, pruning heads etc.) This model is also a Keras [Model](https://www.tensorflow.org/api_docs/python/tf/keras/Model) subclass. Use it as a regular Keras model and refer to the TF/Keras documentation for all matters related to general usage and behavior. Parameters: config ([`EsmConfig`]): Model configuration class with all the parameters of the model. Initializing with a config file does not load the weights associated with the model, only the configuration. Check out the [`~TFPreTrainedModel.from_pretrained`] method to load the model weights. """ ESM_INPUTS_DOCSTRING = r""" Args: input_ids (`tf.Tensor` of shape `({0})`): Indices of input sequence tokens in the vocabulary. Indices can be obtained using [`AutoTokenizer`]. See [`PreTrainedTokenizer.encode`] and [`PreTrainedTokenizer.__call__`] for details. [What are input IDs?](../glossary#input-ids) attention_mask (`tf.Tensor` of shape `({0})`, *optional*): Mask to avoid performing attention on padding token indices. Mask values selected in `[0, 1]`: - 1 for tokens that are **not masked**, - 0 for tokens that are **masked**. [What are attention masks?](../glossary#attention-mask) position_ids (`tf.Tensor` of shape `({0})`, *optional*): Indices of positions of each input sequence tokens in the position embeddings. Selected in the range `[0, config.max_position_embeddings - 1]`. [What are position IDs?](../glossary#position-ids) head_mask (`tf.Tensor` of shape `(num_heads,)` or `(num_layers, num_heads)`, *optional*): Mask to nullify selected heads of the self-attention modules. Mask values selected in `[0, 1]`: - 1 indicates the head is **not masked**, - 0 indicates the head is **masked**. inputs_embeds (`tf.Tensor` of shape `({0}, hidden_size)`, *optional*): Optionally, instead of passing `input_ids` you can choose to directly pass an embedded representation. This is useful if you want more control over how to convert `input_ids` indices into associated vectors than the model's internal embedding lookup matrix. output_attentions (`bool`, *optional*): Whether or not to return the attentions tensors of all attention layers. See `attentions` under returned tensors for more detail. output_hidden_states (`bool`, *optional*): Whether or not to return the hidden states of all layers. See `hidden_states` under returned tensors for more detail. return_dict (`bool`, *optional*): Whether or not to return a [`~file_utils.ModelOutput`] instead of a plain tuple. """ @add_start_docstrings( "The bare ESM Model transformer outputting raw hidden-states without any specific head on top.", ESM_START_DOCSTRING, ) class TFEsmMainLayer(keras.layers.Layer): """ The model can behave as an encoder (with only self-attention) as well as a decoder, in which case a layer of cross-attention is added between the self-attention layers, following the architecture described in [Attention is all you need](https://arxiv.org/abs/1706.03762) by Ashish Vaswani, Noam Shazeer, Niki Parmar, Jakob Uszkoreit, Llion Jones, Aidan N. Gomez, Lukasz Kaiser and Illia Polosukhin. To behave as an decoder the model needs to be initialized with the `is_decoder` argument of the configuration set to `True`. To be used in a Seq2Seq model, the model needs to initialized with both `is_decoder` argument and `add_cross_attention` set to `True`; an `encoder_hidden_states` is then expected as an input to the forward pass. """ _keys_to_ignore_on_load_missing = [r"position_ids"] def __init__(self, config, add_pooling_layer=True, name=None, **kwargs): super().__init__(name=name, **kwargs) self.config = config self.is_decoder = config.is_decoder self.embeddings = TFEsmEmbeddings(config, name="embeddings") self.encoder = TFEsmEncoder(config, name="encoder") self.pooler = TFEsmPooler(config, name="pooler") if add_pooling_layer else None self.contact_head = TFEsmContactPredictionHead( in_features=self.config.num_hidden_layers * self.config.num_attention_heads, bias=True, name="contact_head" ) def build(self, input_shape=None): if self.built: return self.built = True if getattr(self, "embeddings", None) is not None: with tf.name_scope(self.embeddings.name): self.embeddings.build(None) if getattr(self, "encoder", None) is not None: with tf.name_scope(self.encoder.name): self.encoder.build(None) if getattr(self, "pooler", None) is not None: with tf.name_scope(self.pooler.name): self.pooler.build(None) if getattr(self, "contact_head", None) is not None: with tf.name_scope(self.contact_head.name): self.contact_head.build(None) def get_input_embeddings(self): return self.embeddings.word_embeddings def set_input_embeddings(self, value: tf.Variable): self.embeddings.word_embeddings.weight = value self.embeddings.vocab_size = shape_list(value)[0] def _prune_heads(self, heads_to_prune): raise NotImplementedError def call( self, input_ids: TFModelInputType | None = None, attention_mask: np.ndarray | tf.Tensor | None = None, position_ids: np.ndarray | tf.Tensor | None = None, head_mask: np.ndarray | tf.Tensor | None = None, inputs_embeds: np.ndarray | tf.Tensor | None = None, encoder_hidden_states: np.ndarray | tf.Tensor | None = None, encoder_attention_mask: np.ndarray | tf.Tensor | None = None, past_key_values: Optional[Tuple[Tuple[Union[np.ndarray, tf.Tensor]]]] = None, use_cache: Optional[bool] = None, output_attentions: Optional[bool] = None, output_hidden_states: Optional[bool] = None, return_dict: Optional[bool] = None, training: bool = False, ) -> Union[TFBaseModelOutputWithPoolingAndCrossAttentions, Tuple[tf.Tensor]]: if not self.config.is_decoder: use_cache = False if input_ids is not None and inputs_embeds is not None: raise ValueError("You cannot specify both input_ids and inputs_embeds at the same time") elif input_ids is not None: input_shape = shape_list(input_ids) elif inputs_embeds is not None: input_shape = shape_list(inputs_embeds)[:-1] else: raise ValueError("You have to specify either input_ids or inputs_embeds") batch_size, seq_length = input_shape if past_key_values is None: past_key_values_length = 0 past_key_values = [None] * len(self.encoder.layer) else: past_key_values_length = shape_list(past_key_values[0][0])[-2] if attention_mask is None: attention_mask = tf.fill(dims=(batch_size, seq_length + past_key_values_length), value=1) embedding_output = self.embeddings( input_ids=input_ids, attention_mask=attention_mask, position_ids=position_ids, inputs_embeds=inputs_embeds, past_key_values_length=past_key_values_length, training=training, ) # We create a 3D attention mask from a 2D tensor mask. # Sizes are [batch_size, 1, 1, to_seq_length] # So we can broadcast to [batch_size, num_heads, from_seq_length, to_seq_length] # this attention mask is more simple than the triangular masking of causal attention # used in OpenAI GPT, we just need to prepare the broadcast dimension here. attention_mask_shape = shape_list(attention_mask) mask_seq_length = seq_length + past_key_values_length # Copied from `modeling_tf_t5.py` # Provided a padding mask of dimensions [batch_size, mask_seq_length] # - if the model is a decoder, apply a causal mask in addition to the padding mask # - if the model is an encoder, make the mask broadcastable to [batch_size, num_heads, mask_seq_length, mask_seq_length] if self.is_decoder: seq_ids = tf.range(mask_seq_length) causal_mask = tf.less_equal( tf.tile(seq_ids[None, None, :], (batch_size, mask_seq_length, 1)), seq_ids[None, :, None], ) causal_mask = tf.cast(causal_mask, dtype=attention_mask.dtype) extended_attention_mask = causal_mask * attention_mask[:, None, :] attention_mask_shape = shape_list(extended_attention_mask) extended_attention_mask = tf.reshape( extended_attention_mask, (attention_mask_shape[0], 1, attention_mask_shape[1], attention_mask_shape[2]) ) if past_key_values[0] is not None: # attention_mask needs to be sliced to the shape `[batch_size, 1, from_seq_length - cached_seq_length, to_seq_length] extended_attention_mask = extended_attention_mask[:, :, -seq_length:, :] else: extended_attention_mask = tf.reshape( attention_mask, (attention_mask_shape[0], 1, 1, attention_mask_shape[1]) ) # Since attention_mask is 1.0 for positions we want to attend and 0.0 for # masked positions, this operation will create a tensor which is 0.0 for # positions we want to attend and -10000.0 for masked positions. # Since we are adding it to the raw scores before the softmax, this is # effectively the same as removing these entirely. extended_attention_mask = tf.cast(extended_attention_mask, dtype=embedding_output.dtype) one_cst = tf.constant(1.0, dtype=embedding_output.dtype) ten_thousand_cst = tf.constant(-10000.0, dtype=embedding_output.dtype) extended_attention_mask = tf.multiply(tf.subtract(one_cst, extended_attention_mask), ten_thousand_cst) # Copied from `modeling_tf_t5.py` with -1e9 -> -10000 if self.is_decoder and encoder_attention_mask is not None: # If a 2D ou 3D attention mask is provided for the cross-attention # we need to make broadcastable to [batch_size, num_heads, mask_seq_length, mask_seq_length] # we need to make broadcastable to [batch_size, num_heads, seq_length, seq_length] encoder_attention_mask = tf.cast(encoder_attention_mask, dtype=extended_attention_mask.dtype) num_dims_encoder_attention_mask = len(shape_list(encoder_attention_mask)) if num_dims_encoder_attention_mask == 3: encoder_extended_attention_mask = encoder_attention_mask[:, None, :, :] if num_dims_encoder_attention_mask == 2: encoder_extended_attention_mask = encoder_attention_mask[:, None, None, :] # T5 has a mask that can compare sequence ids, we can simulate this here with this transposition # Cf. https://github.com/tensorflow/mesh/blob/8d2465e9bc93129b913b5ccc6a59aa97abd96ec6/mesh_tensorflow/transformer/transformer_layers.py#L270 # encoder_extended_attention_mask = tf.math.equal(encoder_extended_attention_mask, # tf.transpose(encoder_extended_attention_mask, perm=(-1, -2))) encoder_extended_attention_mask = (1.0 - encoder_extended_attention_mask) * -10000.0 else: encoder_extended_attention_mask = None # Prepare head mask if needed # 1.0 in head_mask indicate we keep the head # attention_probs has shape bsz x n_heads x N x N # input head_mask has shape [num_heads] or [num_hidden_layers x num_heads] # and head_mask is converted to shape [num_hidden_layers x batch x num_heads x seq_length x seq_length] if head_mask is not None: raise NotImplementedError else: head_mask = [None] * self.config.num_hidden_layers encoder_outputs = self.encoder( hidden_states=embedding_output, attention_mask=extended_attention_mask, head_mask=head_mask, encoder_hidden_states=encoder_hidden_states, encoder_attention_mask=encoder_extended_attention_mask, past_key_values=past_key_values, use_cache=use_cache, output_attentions=output_attentions, output_hidden_states=output_hidden_states, return_dict=return_dict, training=training, ) sequence_output = encoder_outputs[0] pooled_output = self.pooler(hidden_states=sequence_output) if self.pooler is not None else None if not return_dict: return ( sequence_output, pooled_output, ) + encoder_outputs[1:] return TFBaseModelOutputWithPoolingAndCrossAttentions( last_hidden_state=sequence_output, pooler_output=pooled_output, past_key_values=encoder_outputs.past_key_values, hidden_states=encoder_outputs.hidden_states, attentions=encoder_outputs.attentions, cross_attentions=encoder_outputs.cross_attentions, ) def predict_contacts(self, tokens, attention_mask): attns = self(tokens, attention_mask=attention_mask, return_dict=True, output_attentions=True).attentions attns = tf.stack(attns, axis=1) # Matches the original model layout # In the original model, attentions for padding tokens are completely zeroed out. # This makes no difference most of the time because the other tokens won't attend to them, # but it does for the contact prediction task, which takes attentions as input, # so we have to mimic that here. attention_mask = tf.cast(attention_mask, attns.dtype) attns *= attention_mask[:, None, None, None] attns *= attention_mask[:, None, None, :, None] return self.contact_head(tokens, attns) @add_start_docstrings( "The bare ESM Model transformer outputting raw hidden-states without any specific head on top.", ESM_START_DOCSTRING, ) class TFEsmModel(TFEsmPreTrainedModel): def __init__(self, config: EsmConfig, add_pooling_layer=True, *inputs, **kwargs): super().__init__(config, *inputs, **kwargs) self.esm = TFEsmMainLayer(config, add_pooling_layer=add_pooling_layer, name="esm") @unpack_inputs @add_start_docstrings_to_model_forward(ESM_INPUTS_DOCSTRING.format("batch_size, sequence_length")) @add_code_sample_docstrings( checkpoint=_CHECKPOINT_FOR_DOC, output_type=TFBaseModelOutputWithPoolingAndCrossAttentions, config_class=_CONFIG_FOR_DOC, ) def call( self, input_ids: TFModelInputType | None = None, attention_mask: np.ndarray | tf.Tensor | None = None, position_ids: np.ndarray | tf.Tensor | None = None, head_mask: np.ndarray | tf.Tensor | None = None, inputs_embeds: np.ndarray | tf.Tensor | None = None, encoder_hidden_states: np.ndarray | tf.Tensor | None = None, encoder_attention_mask: np.ndarray | tf.Tensor | None = None, past_key_values: Optional[Tuple[Tuple[Union[np.ndarray, tf.Tensor]]]] = None, use_cache: Optional[bool] = None, output_attentions: Optional[bool] = None, output_hidden_states: Optional[bool] = None, return_dict: Optional[bool] = None, training: Optional[bool] = False, ) -> Union[TFBaseModelOutputWithPoolingAndCrossAttentions, Tuple[tf.Tensor]]: r""" encoder_hidden_states (`tf.Tensor` of shape `(batch_size, sequence_length, hidden_size)`, *optional*): Sequence of hidden-states at the output of the last layer of the encoder. Used in the cross-attention if the model is configured as a decoder. encoder_attention_mask (`tf.Tensor` of shape `(batch_size, sequence_length)`, *optional*): Mask to avoid performing attention on the padding token indices of the encoder input. This mask is used in the cross-attention if the model is configured as a decoder. Mask values selected in `[0, 1]`: - 1 for tokens that are **not masked**, - 0 for tokens that are **masked**. past_key_values (`Tuple[Tuple[tf.Tensor]]` of length `config.n_layers`) contains precomputed key and value hidden states of the attention blocks. Can be used to speed up decoding. If `past_key_values` are used, the user can optionally input only the last `decoder_input_ids` (those that don't have their past key value states given to this model) of shape `(batch_size, 1)` instead of all `decoder_input_ids` of shape `(batch_size, sequence_length)`. use_cache (`bool`, *optional*, defaults to `True`): If set to `True`, `past_key_values` key value states are returned and can be used to speed up decoding (see `past_key_values`). Set to `False` during training, `True` during generation """ outputs = self.esm( input_ids=input_ids, attention_mask=attention_mask, position_ids=position_ids, head_mask=head_mask, inputs_embeds=inputs_embeds, encoder_hidden_states=encoder_hidden_states, encoder_attention_mask=encoder_attention_mask, past_key_values=past_key_values, use_cache=use_cache, output_attentions=output_attentions, output_hidden_states=output_hidden_states, return_dict=return_dict, training=training, ) return outputs def predict_contacts(self, tokens, attention_mask): return self.esm.predict_contacts(tokens, attention_mask) def build(self, input_shape=None): if self.built: return self.built = True if getattr(self, "esm", None) is not None: with tf.name_scope(self.esm.name): self.esm.build(None) @add_start_docstrings("""ESM Model with a `language modeling` head on top.""", ESM_START_DOCSTRING) class TFEsmForMaskedLM(TFEsmPreTrainedModel, TFMaskedLanguageModelingLoss): _keys_to_ignore_on_load_missing = [r"position_ids"] _keys_to_ignore_on_load_unexpected = [r"pooler"] def __init__(self, config): super().__init__(config) if config.is_decoder: logger.warning( "If you want to use `EsmForMaskedLM` make sure `config.is_decoder=False` for " "bi-directional self-attention." ) self.esm = TFEsmMainLayer(config, add_pooling_layer=False, name="esm") self.lm_head = TFEsmLMHead(config, name="lm_head") if config.tie_word_embeddings: # Ensure word embeddings are built so that we actually have something to tie with tf.name_scope(os.path.join(self._name_scope(), "esm", "embeddings", "word_embeddings")): self.esm.embeddings.word_embeddings.build((None, None)) self.lm_head.decoder = self.esm.embeddings.word_embeddings.weights[0] def get_output_embeddings(self): return self.lm_head.decoder def set_output_embeddings(self, new_embeddings): self.lm_head.decoder = new_embeddings def get_lm_head(self): return self.lm_head @unpack_inputs @add_start_docstrings_to_model_forward(ESM_INPUTS_DOCSTRING.format("batch_size, sequence_length")) @add_code_sample_docstrings( checkpoint=_CHECKPOINT_FOR_DOC, output_type=TFMaskedLMOutput, config_class=_CONFIG_FOR_DOC, mask="<mask>", ) def call( self, input_ids: TFModelInputType | None = None, attention_mask: np.ndarray | tf.Tensor | None = None, position_ids: np.ndarray | tf.Tensor | None = None, head_mask: np.ndarray | tf.Tensor | None = None, inputs_embeds: np.ndarray | tf.Tensor | None = None, encoder_hidden_states: np.ndarray | tf.Tensor | None = None, encoder_attention_mask: np.ndarray | tf.Tensor | None = None, labels: np.ndarray | tf.Tensor | None = None, output_attentions: Optional[bool] = None, output_hidden_states: Optional[bool] = None, return_dict: Optional[bool] = None, training: bool = False, ) -> Union[TFMaskedLMOutput, Tuple[tf.Tensor]]: r""" labels (`tf.Tensor` of shape `(batch_size, sequence_length)`, *optional*): Labels for computing the masked language modeling loss. Indices should be in `[-100, 0, ..., config.vocab_size]` (see `input_ids` docstring) Tokens with indices set to `-100` are ignored (masked), the loss is only computed for the tokens with labels in `[0, ..., config.vocab_size]` kwargs (`Dict[str, any]`, optional, defaults to *{}*): Used to hide legacy arguments that have been deprecated. """ return_dict = return_dict if return_dict is not None else self.config.use_return_dict outputs = self.esm( input_ids, attention_mask=attention_mask, position_ids=position_ids, head_mask=head_mask, inputs_embeds=inputs_embeds, encoder_hidden_states=encoder_hidden_states, encoder_attention_mask=encoder_attention_mask, output_attentions=output_attentions, output_hidden_states=output_hidden_states, return_dict=return_dict, training=training, ) sequence_output = outputs[0] prediction_scores = self.lm_head(sequence_output) masked_lm_loss = None if labels is not None: masked_lm_loss = self.hf_compute_loss(labels=labels, logits=prediction_scores) if not return_dict: output = (prediction_scores,) + outputs[2:] return ((masked_lm_loss,) + output) if masked_lm_loss is not None else output return TFMaskedLMOutput( loss=masked_lm_loss, logits=prediction_scores, hidden_states=outputs.hidden_states, attentions=outputs.attentions, ) def predict_contacts(self, tokens, attention_mask): return self.esm.predict_contacts(tokens, attention_mask) def build(self, input_shape=None): if self.built: return self.built = True if getattr(self, "esm", None) is not None: with tf.name_scope(self.esm.name): self.esm.build(None) if getattr(self, "lm_head", None) is not None: with tf.name_scope(self.lm_head.name): self.lm_head.build(None) class TFEsmLMHead(keras.layers.Layer): """ESM Head for masked language modeling.""" def __init__(self, config, name=None): super().__init__(name=name) self.dense = keras.layers.Dense( config.hidden_size, kernel_initializer=get_initializer(config.initializer_range), name="dense" ) self.layer_norm = keras.layers.LayerNormalization(epsilon=config.layer_norm_eps, name="layer_norm") if config.tie_word_embeddings: self.decoder = None else: self.decoder = keras.layers.Dense( config.vocab_size, kernel_initializer=get_initializer(config.initializer_range), name="decoder", use_bias=False, ) self.config = config def build(self, input_shape=None): # Separate bias to match the PT model and allow weight cross-loading to work # Put it in the build so it gets the right name when adding it as a weight if self.built: return self.built = True self.bias = self.add_weight("bias", shape=(self.config.vocab_size,), initializer="zeros", trainable=True) if getattr(self, "dense", None) is not None: with tf.name_scope(self.dense.name): self.dense.build([None, None, self.config.hidden_size]) if getattr(self, "layer_norm", None) is not None: with tf.name_scope(self.layer_norm.name): self.layer_norm.build([None, None, self.config.hidden_size]) if getattr(self, "decoder", None) is not None and not self.config.tie_word_embeddings: with tf.name_scope(self.decoder.name): self.decoder.build([None, None, self.config.hidden_size]) def get_bias(self): return {"bias": self.bias} def call(self, features): x = self.dense(features) x = tf.nn.gelu(x) x = self.layer_norm(x) # project back to size of vocabulary with bias if self.config.tie_word_embeddings: x = tf.matmul(x, self.decoder, transpose_b=True) + self.bias else: x = self.decoder(x) + self.bias return x @add_start_docstrings( """ ESM Model transformer with a sequence classification/regression head on top (a linear layer on top of the pooled output) e.g. for GLUE tasks. """, ESM_START_DOCSTRING, ) class TFEsmForSequenceClassification(TFEsmPreTrainedModel, TFSequenceClassificationLoss): _keys_to_ignore_on_load_missing = [r"position_ids"] def __init__(self, config): super().__init__(config) self.num_labels = config.num_labels self.config = config self.esm = TFEsmMainLayer(config, add_pooling_layer=False, name="esm") self.classifier = TFEsmClassificationHead(config, name="classifier") @unpack_inputs @add_start_docstrings_to_model_forward(ESM_INPUTS_DOCSTRING.format("batch_size, sequence_length")) @add_code_sample_docstrings( checkpoint=_CHECKPOINT_FOR_DOC, output_type=TFSequenceClassifierOutput, config_class=_CONFIG_FOR_DOC, ) def call( self, input_ids: TFModelInputType | None = None, attention_mask: np.ndarray | tf.Tensor | None = None, position_ids: np.ndarray | tf.Tensor | None = None, head_mask: np.ndarray | tf.Tensor | None = None, inputs_embeds: np.ndarray | tf.Tensor | None = None, labels: np.ndarray | tf.Tensor | None = None, output_attentions: Optional[bool] = None, output_hidden_states: Optional[bool] = None, return_dict: Optional[bool] = None, training: bool = False, ) -> Union[TFSequenceClassifierOutput, Tuple[tf.Tensor]]: r""" labels (`tf.Tensor` of shape `(batch_size,)`, *optional*): Labels for computing the sequence classification/regression loss. Indices should be in `[0, ..., config.num_labels - 1]`. If `config.num_labels == 1` a regression loss is computed (Mean-Square loss), If `config.num_labels > 1` a classification loss is computed (Cross-Entropy). """ return_dict = return_dict if return_dict is not None else self.config.use_return_dict outputs = self.esm( input_ids, attention_mask=attention_mask, position_ids=position_ids, head_mask=head_mask, inputs_embeds=inputs_embeds, output_attentions=output_attentions, output_hidden_states=output_hidden_states, return_dict=return_dict, training=training, ) sequence_output = outputs[0] logits = self.classifier(sequence_output) loss = None if labels is None else self.hf_compute_loss(labels, logits) if not return_dict: output = (logits,) + outputs[2:] return ((loss,) + output) if loss is not None else output return TFSequenceClassifierOutput( loss=loss, logits=logits, hidden_states=outputs.hidden_states, attentions=outputs.attentions, ) def build(self, input_shape=None): if self.built: return self.built = True if getattr(self, "esm", None) is not None: with tf.name_scope(self.esm.name): self.esm.build(None) if getattr(self, "classifier", None) is not None: with tf.name_scope(self.classifier.name): self.classifier.build(None) @add_start_docstrings( """ ESM Model with a token classification head on top (a linear layer on top of the hidden-states output) e.g. for Named-Entity-Recognition (NER) tasks. """, ESM_START_DOCSTRING, ) class TFEsmForTokenClassification(TFEsmPreTrainedModel, TFTokenClassificationLoss): _keys_to_ignore_on_load_unexpected = [r"pooler"] _keys_to_ignore_on_load_missing = [r"position_ids"] def __init__(self, config): super().__init__(config) self.num_labels = config.num_labels self.esm = TFEsmMainLayer(config, add_pooling_layer=False, name="esm") self.dropout = keras.layers.Dropout(config.hidden_dropout_prob) self.classifier = keras.layers.Dense(config.num_labels, name="classifier") self.config = config @unpack_inputs @add_start_docstrings_to_model_forward(ESM_INPUTS_DOCSTRING.format("batch_size, sequence_length")) @add_code_sample_docstrings( checkpoint=_CHECKPOINT_FOR_DOC, output_type=TFTokenClassifierOutput, config_class=_CONFIG_FOR_DOC, ) def call( self, input_ids: TFModelInputType | None = None, attention_mask: np.ndarray | tf.Tensor | None = None, position_ids: np.ndarray | tf.Tensor | None = None, head_mask: np.ndarray | tf.Tensor | None = None, inputs_embeds: np.ndarray | tf.Tensor | None = None, labels: np.ndarray | tf.Tensor | None = None, output_attentions: Optional[bool] = None, output_hidden_states: Optional[bool] = None, return_dict: Optional[bool] = None, training: bool = False, ) -> Union[TFTokenClassifierOutput, Tuple[tf.Tensor]]: r""" labels (`tf.Tensor` of shape `(batch_size, sequence_length)`, *optional*): Labels for computing the token classification loss. Indices should be in `[0, ..., config.num_labels - 1]`. """ return_dict = return_dict if return_dict is not None else self.config.use_return_dict outputs = self.esm( input_ids, attention_mask=attention_mask, position_ids=position_ids, head_mask=head_mask, inputs_embeds=inputs_embeds, output_attentions=output_attentions, output_hidden_states=output_hidden_states, return_dict=return_dict, training=training, ) sequence_output = outputs[0] sequence_output = self.dropout(sequence_output, training=training) logits = self.classifier(sequence_output) loss = None if labels is None else self.hf_compute_loss(labels, logits) if not return_dict: output = (logits,) + outputs[2:] return ((loss,) + output) if loss is not None else output return TFTokenClassifierOutput( loss=loss, logits=logits, hidden_states=outputs.hidden_states, attentions=outputs.attentions, ) def build(self, input_shape=None): if self.built: return self.built = True if getattr(self, "esm", None) is not None: with tf.name_scope(self.esm.name): self.esm.build(None) if getattr(self, "classifier", None) is not None: with tf.name_scope(self.classifier.name): self.classifier.build([None, None, self.config.hidden_size]) class TFEsmClassificationHead(keras.layers.Layer): """Head for sentence-level classification tasks.""" def __init__(self, config, name=None): super().__init__(name=name) self.dense = keras.layers.Dense( config.hidden_size, kernel_initializer=get_initializer(config.initializer_range), activation="tanh", name="dense", ) self.dropout = keras.layers.Dropout(config.hidden_dropout_prob) self.out_proj = keras.layers.Dense( config.num_labels, kernel_initializer=get_initializer(config.initializer_range), activation="linear", name="out_proj", ) self.config = config def call(self, features, training=False): x = features[:, 0, :] # take <s> token (equiv. to [CLS]) x = self.dropout(x, training=training) x = self.dense(x) x = self.dropout(x, training=training) x = self.out_proj(x) return x def build(self, input_shape=None): if self.built: return self.built = True if getattr(self, "dense", None) is not None: with tf.name_scope(self.dense.name): self.dense.build([None, None, self.config.hidden_size]) if getattr(self, "out_proj", None) is not None: with tf.name_scope(self.out_proj.name): self.out_proj.build([None, None, self.config.hidden_size]) def create_position_ids_from_input_ids(input_ids, padding_idx, past_key_values_length=0): """ Replace non-padding symbols with their position numbers. Position numbers begin at padding_idx+1. Padding symbols are ignored. This is modified from fairseq's `utils.make_positions`. Args: x: tf.Tensor x: Returns: tf.Tensor """ # The series of casts and type-conversions here are carefully balanced to both work with ONNX export and XLA. mask = tf.cast(input_ids != padding_idx, tf.int64) incremental_indices = (tf.cumsum(mask, axis=1) + past_key_values_length) * mask return incremental_indices + padding_idx

transformers/src/transformers/models/esm/modeling_tf_esm.py/0

{ "file_path": "transformers/src/transformers/models/esm/modeling_tf_esm.py", "repo_id": "transformers", "token_count": 30031 }

88

# coding=utf-8 # Copyright 2023 The HuggingFace Inc. team. All rights reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. """ FastSpeech2Conformer model configuration""" from typing import Dict from ...configuration_utils import PretrainedConfig from ...utils import logging logger = logging.get_logger(__name__) FASTSPEECH2_CONFORMER_PRETRAINED_CONFIG_ARCHIVE_MAP = { "espnet/fastspeech2_conformer": "https://huggingface.co/espnet/fastspeech2_conformer/raw/main/config.json", } FASTSPEECH2_CONFORMER_HIFIGAN_PRETRAINED_CONFIG_ARCHIVE_MAP = { "espnet/fastspeech2_conformer_hifigan": "https://huggingface.co/espnet/fastspeech2_conformer_hifigan/raw/main/config.json", } FASTSPEECH2_CONFORMER_WITH_HIFIGAN_PRETRAINED_CONFIG_ARCHIVE_MAP = { "espnet/fastspeech2_conformer_with_hifigan": "https://huggingface.co/espnet/fastspeech2_conformer_with_hifigan/raw/main/config.json", } class FastSpeech2ConformerConfig(PretrainedConfig): r""" This is the configuration class to store the configuration of a [`FastSpeech2ConformerModel`]. It is used to instantiate a FastSpeech2Conformer model according to the specified arguments, defining the model architecture. Instantiating a configuration with the defaults will yield a similar configuration to that of the FastSpeech2Conformer [espnet/fastspeech2_conformer](https://huggingface.co/espnet/fastspeech2_conformer) architecture. Configuration objects inherit from [`PretrainedConfig`] and can be used to control the model outputs. Read the documentation from [`PretrainedConfig`] for more information. Args: hidden_size (`int`, *optional*, defaults to 384): The dimensionality of the hidden layers. vocab_size (`int`, *optional*, defaults to 78): The size of the vocabulary. num_mel_bins (`int`, *optional*, defaults to 80): The number of mel filters used in the filter bank. encoder_num_attention_heads (`int`, *optional*, defaults to 2): The number of attention heads in the encoder. encoder_layers (`int`, *optional*, defaults to 4): The number of layers in the encoder. encoder_linear_units (`int`, *optional*, defaults to 1536): The number of units in the linear layer of the encoder. decoder_layers (`int`, *optional*, defaults to 4): The number of layers in the decoder. decoder_num_attention_heads (`int`, *optional*, defaults to 2): The number of attention heads in the decoder. decoder_linear_units (`int`, *optional*, defaults to 1536): The number of units in the linear layer of the decoder. speech_decoder_postnet_layers (`int`, *optional*, defaults to 5): The number of layers in the post-net of the speech decoder. speech_decoder_postnet_units (`int`, *optional*, defaults to 256): The number of units in the post-net layers of the speech decoder. speech_decoder_postnet_kernel (`int`, *optional*, defaults to 5): The kernel size in the post-net of the speech decoder. positionwise_conv_kernel_size (`int`, *optional*, defaults to 3): The size of the convolution kernel used in the position-wise layer. encoder_normalize_before (`bool`, *optional*, defaults to `False`): Specifies whether to normalize before encoder layers. decoder_normalize_before (`bool`, *optional*, defaults to `False`): Specifies whether to normalize before decoder layers. encoder_concat_after (`bool`, *optional*, defaults to `False`): Specifies whether to concatenate after encoder layers. decoder_concat_after (`bool`, *optional*, defaults to `False`): Specifies whether to concatenate after decoder layers. reduction_factor (`int`, *optional*, defaults to 1): The factor by which the speech frame rate is reduced. speaking_speed (`float`, *optional*, defaults to 1.0): The speed of the speech produced. use_macaron_style_in_conformer (`bool`, *optional*, defaults to `True`): Specifies whether to use macaron style in the conformer. use_cnn_in_conformer (`bool`, *optional*, defaults to `True`): Specifies whether to use convolutional neural networks in the conformer. encoder_kernel_size (`int`, *optional*, defaults to 7): The kernel size used in the encoder. decoder_kernel_size (`int`, *optional*, defaults to 31): The kernel size used in the decoder. duration_predictor_layers (`int`, *optional*, defaults to 2): The number of layers in the duration predictor. duration_predictor_channels (`int`, *optional*, defaults to 256): The number of channels in the duration predictor. duration_predictor_kernel_size (`int`, *optional*, defaults to 3): The kernel size used in the duration predictor. energy_predictor_layers (`int`, *optional*, defaults to 2): The number of layers in the energy predictor. energy_predictor_channels (`int`, *optional*, defaults to 256): The number of channels in the energy predictor. energy_predictor_kernel_size (`int`, *optional*, defaults to 3): The kernel size used in the energy predictor. energy_predictor_dropout (`float`, *optional*, defaults to 0.5): The dropout rate in the energy predictor. energy_embed_kernel_size (`int`, *optional*, defaults to 1): The kernel size used in the energy embed layer. energy_embed_dropout (`float`, *optional*, defaults to 0.0): The dropout rate in the energy embed layer. stop_gradient_from_energy_predictor (`bool`, *optional*, defaults to `False`): Specifies whether to stop gradients from the energy predictor. pitch_predictor_layers (`int`, *optional*, defaults to 5): The number of layers in the pitch predictor. pitch_predictor_channels (`int`, *optional*, defaults to 256): The number of channels in the pitch predictor. pitch_predictor_kernel_size (`int`, *optional*, defaults to 5): The kernel size used in the pitch predictor. pitch_predictor_dropout (`float`, *optional*, defaults to 0.5): The dropout rate in the pitch predictor. pitch_embed_kernel_size (`int`, *optional*, defaults to 1): The kernel size used in the pitch embed layer. pitch_embed_dropout (`float`, *optional*, defaults to 0.0): The dropout rate in the pitch embed layer. stop_gradient_from_pitch_predictor (`bool`, *optional*, defaults to `True`): Specifies whether to stop gradients from the pitch predictor. encoder_dropout_rate (`float`, *optional*, defaults to 0.2): The dropout rate in the encoder. encoder_positional_dropout_rate (`float`, *optional*, defaults to 0.2): The positional dropout rate in the encoder. encoder_attention_dropout_rate (`float`, *optional*, defaults to 0.2): The attention dropout rate in the encoder. decoder_dropout_rate (`float`, *optional*, defaults to 0.2): The dropout rate in the decoder. decoder_positional_dropout_rate (`float`, *optional*, defaults to 0.2): The positional dropout rate in the decoder. decoder_attention_dropout_rate (`float`, *optional*, defaults to 0.2): The attention dropout rate in the decoder. duration_predictor_dropout_rate (`float`, *optional*, defaults to 0.2): The dropout rate in the duration predictor. speech_decoder_postnet_dropout (`float`, *optional*, defaults to 0.5): The dropout rate in the speech decoder postnet. max_source_positions (`int`, *optional*, defaults to 5000): if `"relative"` position embeddings are used, defines the maximum source input positions. use_masking (`bool`, *optional*, defaults to `True`): Specifies whether to use masking in the model. use_weighted_masking (`bool`, *optional*, defaults to `False`): Specifies whether to use weighted masking in the model. num_speakers (`int`, *optional*): Number of speakers. If set to > 1, assume that the speaker ids will be provided as the input and use speaker id embedding layer. num_languages (`int`, *optional*): Number of languages. If set to > 1, assume that the language ids will be provided as the input and use the languge id embedding layer. speaker_embed_dim (`int`, *optional*): Speaker embedding dimension. If set to > 0, assume that speaker_embedding will be provided as the input. is_encoder_decoder (`bool`, *optional*, defaults to `True`): Specifies whether the model is an encoder-decoder. Example: ```python >>> from transformers import FastSpeech2ConformerModel, FastSpeech2ConformerConfig >>> # Initializing a FastSpeech2Conformer style configuration >>> configuration = FastSpeech2ConformerConfig() >>> # Initializing a model from the FastSpeech2Conformer style configuration >>> model = FastSpeech2ConformerModel(configuration) >>> # Accessing the model configuration >>> configuration = model.config ```""" model_type = "fastspeech2_conformer" attribute_map = {"num_hidden_layers": "encoder_layers", "num_attention_heads": "encoder_num_attention_heads"} def __init__( self, hidden_size=384, vocab_size=78, num_mel_bins=80, encoder_num_attention_heads=2, encoder_layers=4, encoder_linear_units=1536, decoder_layers=4, decoder_num_attention_heads=2, decoder_linear_units=1536, speech_decoder_postnet_layers=5, speech_decoder_postnet_units=256, speech_decoder_postnet_kernel=5, positionwise_conv_kernel_size=3, encoder_normalize_before=False, decoder_normalize_before=False, encoder_concat_after=False, decoder_concat_after=False, reduction_factor=1, speaking_speed=1.0, use_macaron_style_in_conformer=True, use_cnn_in_conformer=True, encoder_kernel_size=7, decoder_kernel_size=31, duration_predictor_layers=2, duration_predictor_channels=256, duration_predictor_kernel_size=3, energy_predictor_layers=2, energy_predictor_channels=256, energy_predictor_kernel_size=3, energy_predictor_dropout=0.5, energy_embed_kernel_size=1, energy_embed_dropout=0.0, stop_gradient_from_energy_predictor=False, pitch_predictor_layers=5, pitch_predictor_channels=256, pitch_predictor_kernel_size=5, pitch_predictor_dropout=0.5, pitch_embed_kernel_size=1, pitch_embed_dropout=0.0, stop_gradient_from_pitch_predictor=True, encoder_dropout_rate=0.2, encoder_positional_dropout_rate=0.2, encoder_attention_dropout_rate=0.2, decoder_dropout_rate=0.2, decoder_positional_dropout_rate=0.2, decoder_attention_dropout_rate=0.2, duration_predictor_dropout_rate=0.2, speech_decoder_postnet_dropout=0.5, max_source_positions=5000, use_masking=True, use_weighted_masking=False, num_speakers=None, num_languages=None, speaker_embed_dim=None, is_encoder_decoder=True, **kwargs, ): if positionwise_conv_kernel_size % 2 == 0: raise ValueError( f"positionwise_conv_kernel_size must be odd, but got {positionwise_conv_kernel_size} instead." ) if encoder_kernel_size % 2 == 0: raise ValueError(f"encoder_kernel_size must be odd, but got {encoder_kernel_size} instead.") if decoder_kernel_size % 2 == 0: raise ValueError(f"decoder_kernel_size must be odd, but got {decoder_kernel_size} instead.") if duration_predictor_kernel_size % 2 == 0: raise ValueError( f"duration_predictor_kernel_size must be odd, but got {duration_predictor_kernel_size} instead." ) if energy_predictor_kernel_size % 2 == 0: raise ValueError( f"energy_predictor_kernel_size must be odd, but got {energy_predictor_kernel_size} instead." ) if energy_embed_kernel_size % 2 == 0: raise ValueError(f"energy_embed_kernel_size must be odd, but got {energy_embed_kernel_size} instead.") if pitch_predictor_kernel_size % 2 == 0: raise ValueError( f"pitch_predictor_kernel_size must be odd, but got {pitch_predictor_kernel_size} instead." ) if pitch_embed_kernel_size % 2 == 0: raise ValueError(f"pitch_embed_kernel_size must be odd, but got {pitch_embed_kernel_size} instead.") if hidden_size % encoder_num_attention_heads != 0: raise ValueError("The hidden_size must be evenly divisible by encoder_num_attention_heads.") if hidden_size % decoder_num_attention_heads != 0: raise ValueError("The hidden_size must be evenly divisible by decoder_num_attention_heads.") if use_masking and use_weighted_masking: raise ValueError("Either use_masking or use_weighted_masking can be True, but not both.") self.hidden_size = hidden_size self.vocab_size = vocab_size self.num_mel_bins = num_mel_bins self.encoder_config = { "num_attention_heads": encoder_num_attention_heads, "layers": encoder_layers, "kernel_size": encoder_kernel_size, "attention_dropout_rate": encoder_attention_dropout_rate, "dropout_rate": encoder_dropout_rate, "positional_dropout_rate": encoder_positional_dropout_rate, "linear_units": encoder_linear_units, "normalize_before": encoder_normalize_before, "concat_after": encoder_concat_after, } self.decoder_config = { "num_attention_heads": decoder_num_attention_heads, "layers": decoder_layers, "kernel_size": decoder_kernel_size, "attention_dropout_rate": decoder_attention_dropout_rate, "dropout_rate": decoder_dropout_rate, "positional_dropout_rate": decoder_positional_dropout_rate, "linear_units": decoder_linear_units, "normalize_before": decoder_normalize_before, "concat_after": decoder_concat_after, } self.encoder_num_attention_heads = encoder_num_attention_heads self.encoder_layers = encoder_layers self.duration_predictor_channels = duration_predictor_channels self.duration_predictor_kernel_size = duration_predictor_kernel_size self.duration_predictor_layers = duration_predictor_layers self.energy_embed_dropout = energy_embed_dropout self.energy_embed_kernel_size = energy_embed_kernel_size self.energy_predictor_channels = energy_predictor_channels self.energy_predictor_dropout = energy_predictor_dropout self.energy_predictor_kernel_size = energy_predictor_kernel_size self.energy_predictor_layers = energy_predictor_layers self.pitch_embed_dropout = pitch_embed_dropout self.pitch_embed_kernel_size = pitch_embed_kernel_size self.pitch_predictor_channels = pitch_predictor_channels self.pitch_predictor_dropout = pitch_predictor_dropout self.pitch_predictor_kernel_size = pitch_predictor_kernel_size self.pitch_predictor_layers = pitch_predictor_layers self.positionwise_conv_kernel_size = positionwise_conv_kernel_size self.speech_decoder_postnet_units = speech_decoder_postnet_units self.speech_decoder_postnet_dropout = speech_decoder_postnet_dropout self.speech_decoder_postnet_kernel = speech_decoder_postnet_kernel self.speech_decoder_postnet_layers = speech_decoder_postnet_layers self.reduction_factor = reduction_factor self.speaking_speed = speaking_speed self.stop_gradient_from_energy_predictor = stop_gradient_from_energy_predictor self.stop_gradient_from_pitch_predictor = stop_gradient_from_pitch_predictor self.max_source_positions = max_source_positions self.use_cnn_in_conformer = use_cnn_in_conformer self.use_macaron_style_in_conformer = use_macaron_style_in_conformer self.use_masking = use_masking self.use_weighted_masking = use_weighted_masking self.num_speakers = num_speakers self.num_languages = num_languages self.speaker_embed_dim = speaker_embed_dim self.duration_predictor_dropout_rate = duration_predictor_dropout_rate self.is_encoder_decoder = is_encoder_decoder super().__init__( is_encoder_decoder=is_encoder_decoder, **kwargs, ) class FastSpeech2ConformerHifiGanConfig(PretrainedConfig): r""" This is the configuration class to store the configuration of a [`FastSpeech2ConformerHifiGanModel`]. It is used to instantiate a FastSpeech2Conformer HiFi-GAN vocoder model according to the specified arguments, defining the model architecture. Instantiating a configuration with the defaults will yield a similar configuration to that of the FastSpeech2Conformer [espnet/fastspeech2_conformer_hifigan](https://huggingface.co/espnet/fastspeech2_conformer_hifigan) architecture. Configuration objects inherit from [`PretrainedConfig`] and can be used to control the model outputs. Read the documentation from [`PretrainedConfig`] for more information. Args: model_in_dim (`int`, *optional*, defaults to 80): The number of frequency bins in the input log-mel spectrogram. upsample_initial_channel (`int`, *optional*, defaults to 512): The number of input channels into the upsampling network. upsample_rates (`Tuple[int]` or `List[int]`, *optional*, defaults to `[8, 8, 2, 2]`): A tuple of integers defining the stride of each 1D convolutional layer in the upsampling network. The length of *upsample_rates* defines the number of convolutional layers and has to match the length of *upsample_kernel_sizes*. upsample_kernel_sizes (`Tuple[int]` or `List[int]`, *optional*, defaults to `[16, 16, 4, 4]`): A tuple of integers defining the kernel size of each 1D convolutional layer in the upsampling network. The length of *upsample_kernel_sizes* defines the number of convolutional layers and has to match the length of *upsample_rates*. resblock_kernel_sizes (`Tuple[int]` or `List[int]`, *optional*, defaults to `[3, 7, 11]`): A tuple of integers defining the kernel sizes of the 1D convolutional layers in the multi-receptive field fusion (MRF) module. resblock_dilation_sizes (`Tuple[Tuple[int]]` or `List[List[int]]`, *optional*, defaults to `[[1, 3, 5], [1, 3, 5], [1, 3, 5]]`): A nested tuple of integers defining the dilation rates of the dilated 1D convolutional layers in the multi-receptive field fusion (MRF) module. initializer_range (`float`, *optional*, defaults to 0.01): The standard deviation of the truncated_normal_initializer for initializing all weight matrices. leaky_relu_slope (`float`, *optional*, defaults to 0.1): The angle of the negative slope used by the leaky ReLU activation. normalize_before (`bool`, *optional*, defaults to `True`): Whether or not to normalize the spectrogram before vocoding using the vocoder's learned mean and variance. Example: ```python >>> from transformers import FastSpeech2ConformerHifiGan, FastSpeech2ConformerHifiGanConfig >>> # Initializing a FastSpeech2ConformerHifiGan configuration >>> configuration = FastSpeech2ConformerHifiGanConfig() >>> # Initializing a model (with random weights) from the configuration >>> model = FastSpeech2ConformerHifiGan(configuration) >>> # Accessing the model configuration >>> configuration = model.config ```""" model_type = "hifigan" def __init__( self, model_in_dim=80, upsample_initial_channel=512, upsample_rates=[8, 8, 2, 2], upsample_kernel_sizes=[16, 16, 4, 4], resblock_kernel_sizes=[3, 7, 11], resblock_dilation_sizes=[[1, 3, 5], [1, 3, 5], [1, 3, 5]], initializer_range=0.01, leaky_relu_slope=0.1, normalize_before=True, **kwargs, ): self.model_in_dim = model_in_dim self.upsample_initial_channel = upsample_initial_channel self.upsample_rates = upsample_rates self.upsample_kernel_sizes = upsample_kernel_sizes self.resblock_kernel_sizes = resblock_kernel_sizes self.resblock_dilation_sizes = resblock_dilation_sizes self.initializer_range = initializer_range self.leaky_relu_slope = leaky_relu_slope self.normalize_before = normalize_before super().__init__(**kwargs) class FastSpeech2ConformerWithHifiGanConfig(PretrainedConfig): """ This is the configuration class to store the configuration of a [`FastSpeech2ConformerWithHifiGan`]. It is used to instantiate a `FastSpeech2ConformerWithHifiGanModel` model according to the specified sub-models configurations, defining the model architecture. Instantiating a configuration with the defaults will yield a similar configuration to that of the FastSpeech2ConformerModel [espnet/fastspeech2_conformer](https://huggingface.co/espnet/fastspeech2_conformer) and FastSpeech2ConformerHifiGan [espnet/fastspeech2_conformer_hifigan](https://huggingface.co/espnet/fastspeech2_conformer_hifigan) architectures. Configuration objects inherit from [`PretrainedConfig`] and can be used to control the model outputs. Read the documentation from [`PretrainedConfig`] for more information. Args: model_config (`typing.Dict`, *optional*): Configuration of the text-to-speech model. vocoder_config (`typing.Dict`, *optional*): Configuration of the vocoder model. model_config ([`FastSpeech2ConformerConfig`], *optional*): Configuration of the text-to-speech model. vocoder_config ([`FastSpeech2ConformerHiFiGanConfig`], *optional*): Configuration of the vocoder model. Example: ```python >>> from transformers import ( ... FastSpeech2ConformerConfig, ... FastSpeech2ConformerHifiGanConfig, ... FastSpeech2ConformerWithHifiGanConfig, ... FastSpeech2ConformerWithHifiGan, ... ) >>> # Initializing FastSpeech2ConformerWithHifiGan sub-modules configurations. >>> model_config = FastSpeech2ConformerConfig() >>> vocoder_config = FastSpeech2ConformerHifiGanConfig() >>> # Initializing a FastSpeech2ConformerWithHifiGan module style configuration >>> configuration = FastSpeech2ConformerWithHifiGanConfig(model_config.to_dict(), vocoder_config.to_dict()) >>> # Initializing a model (with random weights) >>> model = FastSpeech2ConformerWithHifiGan(configuration) >>> # Accessing the model configuration >>> configuration = model.config ``` """ model_type = "fastspeech2_conformer_with_hifigan" is_composition = True def __init__( self, model_config: Dict = None, vocoder_config: Dict = None, **kwargs, ): if model_config is None: model_config = {} logger.info("model_config is None. initializing the model with default values.") if vocoder_config is None: vocoder_config = {} logger.info("vocoder_config is None. initializing the coarse model with default values.") self.model_config = FastSpeech2ConformerConfig(**model_config) self.vocoder_config = FastSpeech2ConformerHifiGanConfig(**vocoder_config) super().__init__(**kwargs)

transformers/src/transformers/models/fastspeech2_conformer/configuration_fastspeech2_conformer.py/0

{ "file_path": "transformers/src/transformers/models/fastspeech2_conformer/configuration_fastspeech2_conformer.py", "repo_id": "transformers", "token_count": 9839 }

89

# coding=utf-8 # Copyright 2022 The HuggingFace Inc. team. All rights reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. """Image processor class for Flava.""" import math import random from functools import lru_cache from typing import Any, Dict, Iterable, List, Optional, Tuple, Union import numpy as np from ...image_processing_utils import BaseImageProcessor, BatchFeature, get_size_dict from ...image_transforms import resize, to_channel_dimension_format from ...image_utils import ( OPENAI_CLIP_MEAN, OPENAI_CLIP_STD, ChannelDimension, ImageInput, PILImageResampling, infer_channel_dimension_format, is_scaled_image, make_list_of_images, to_numpy_array, valid_images, validate_kwargs, validate_preprocess_arguments, ) from ...utils import TensorType, is_vision_available, logging if is_vision_available(): import PIL logger = logging.get_logger(__name__) # These values are taken from CLIP FLAVA_IMAGE_MEAN = OPENAI_CLIP_MEAN FLAVA_IMAGE_STD = OPENAI_CLIP_STD FLAVA_CODEBOOK_MEAN = [0.0, 0.0, 0.0] FLAVA_CODEBOOK_STD = [1.0, 1.0, 1.0] LOGIT_LAPLACE_EPS: float = 0.1 # Inspired from https://github.com/microsoft/unilm/blob/master/beit/masking_generator.py class FlavaMaskingGenerator: def __init__( self, input_size: Union[int, Tuple[int, int]] = 14, total_mask_patches: int = 75, mask_group_max_patches: Optional[int] = None, mask_group_min_patches: int = 16, mask_group_min_aspect_ratio: Optional[float] = 0.3, mask_group_max_aspect_ratio: float = None, ): if not isinstance(input_size, tuple): input_size = (input_size,) * 2 self.height, self.width = input_size self.num_patches = self.height * self.width self.total_mask_patches = total_mask_patches self.mask_group_min_patches = mask_group_min_patches self.mask_group_max_patches = total_mask_patches if mask_group_max_patches is None else mask_group_max_patches mask_group_max_aspect_ratio = mask_group_max_aspect_ratio or 1 / mask_group_min_aspect_ratio self.log_aspect_ratio = (math.log(mask_group_min_aspect_ratio), math.log(mask_group_max_aspect_ratio)) def __repr__(self): repr_str = "MaskingGenerator(%d, %d -> [%d ~ %d], max = %d, %.3f ~ %.3f)" % ( self.height, self.width, self.mask_group_min_patches, self.mask_group_max_patches, self.total_mask_patches, self.log_aspect_ratio[0], self.log_aspect_ratio[1], ) return repr_str def get_shape(self): return self.height, self.width def _mask(self, mask, max_mask_patches): delta = 0 for _attempt in range(10): target_area = random.uniform(self.mask_group_min_patches, max_mask_patches) aspect_ratio = math.exp(random.uniform(*self.log_aspect_ratio)) height = int(round(math.sqrt(target_area * aspect_ratio))) width = int(round(math.sqrt(target_area / aspect_ratio))) if width < self.width and height < self.height: top = random.randint(0, self.height - height) left = random.randint(0, self.width - width) num_masked = mask[top : top + height, left : left + width].sum() # Overlap if 0 < height * width - num_masked <= max_mask_patches: for i in range(top, top + height): for j in range(left, left + width): if mask[i, j] == 0: mask[i, j] = 1 delta += 1 if delta > 0: break return delta def __call__(self): mask = np.zeros(shape=self.get_shape(), dtype=int) mask_count = 0 while mask_count < self.total_mask_patches: max_mask_patches = self.total_mask_patches - mask_count max_mask_patches = min(max_mask_patches, self.mask_group_max_patches) delta = self._mask(mask, max_mask_patches) if delta == 0: break else: mask_count += delta return mask class FlavaImageProcessor(BaseImageProcessor): r""" Constructs a Flava image processor. Args: do_resize (`bool`, *optional*, defaults to `True`): Whether to resize the image's (height, width) dimensions to the specified `size`. Can be overridden by the `do_resize` parameter in `preprocess`. size (`Dict[str, int]` *optional*, defaults to `{"height": 224, "width": 224}`): Size of the image after resizing. Can be overridden by the `size` parameter in `preprocess`. resample (`PILImageResampling`, *optional*, defaults to `PILImageResampling.BICUBIC`): Resampling filter to use if resizing the image. Can be overridden by the `resample` parameter in `preprocess`. do_center_crop (`bool`, *optional*, defaults to `True`): Whether to center crop the images. Can be overridden by the `do_center_crop` parameter in `preprocess`. crop_size (`Dict[str, int]` *optional*, defaults to `{"height": 224, "width": 224}`): Size of image after the center crop `(crop_size["height"], crop_size["width"])`. Can be overridden by the `crop_size` parameter in `preprocess`. do_rescale (`bool`, *optional*, defaults to `True`): Whether to rescale the image by the specified scale `rescale_factor`. Can be overridden by the `do_rescale` parameter in `preprocess`. rescale_factor (`int` or `float`, *optional*, defaults to `1/255`): Scale factor to use if rescaling the image. Can be overridden by the `rescale_factor` parameter in `preprocess`. do_normalize (`bool`, *optional*, defaults to `True`): Whether to normalize the image. Can be overridden by the `do_normalize` parameter in `preprocess`. image_mean (`float` or `List[float]`, *optional*, defaults to `IMAGENET_STANDARD_MEAN`): Mean to use if normalizing the image. This is a float or list of floats the length of the number of channels in the image. Can be overridden by the `image_mean` parameter in the `preprocess` method. image_std (`float` or `List[float]`, *optional*, defaults to `IMAGENET_STANDARD_STD`): Standard deviation to use if normalizing the image. This is a float or list of floats the length of the number of channels in the image. Can be overridden by the `image_std` parameter in the `preprocess` method. return_image_mask (`bool`, *optional*, defaults to `False`): Whether to return the image mask. Can be overridden by the `return_image_mask` parameter in `preprocess`. input_size_patches (`int`, *optional*, defaults to 14): Number of patches in the image in height and width direction. 14x14 = 196 total patches. Can be overridden by the `input_size_patches` parameter in `preprocess`. total_mask_patches (`int`, *optional*, defaults to 75): Total number of patches that should be masked. Can be overridden by the `total_mask_patches` parameter in `preprocess`. mask_group_min_patches (`int`, *optional*, defaults to 16): Minimum number of patches that should be masked. Can be overridden by the `mask_group_min_patches` parameter in `preprocess`. mask_group_max_patches (`int`, *optional*): Maximum number of patches that should be masked. Can be overridden by the `mask_group_max_patches` parameter in `preprocess`. mask_group_min_aspect_ratio (`float`, *optional*, defaults to 0.3): Minimum aspect ratio of the mask window. Can be overridden by the `mask_group_min_aspect_ratio` parameter in `preprocess`. mask_group_max_aspect_ratio (`float`, *optional*): Maximum aspect ratio of the mask window. Can be overridden by the `mask_group_max_aspect_ratio` parameter in `preprocess`. codebook_do_resize (`bool`, *optional*, defaults to `True`): Whether to resize the input for codebook to a certain. Can be overridden by the `codebook_do_resize` parameter in `preprocess`. `codebook_size`. codebook_size (`Dict[str, int]`, *optional*, defaults to `{"height": 224, "width": 224}`): Resize the input for codebook to the given size. Can be overridden by the `codebook_size` parameter in `preprocess`. codebook_resample (`PILImageResampling`, *optional*, defaults to `PILImageResampling.LANCZOS`): Resampling filter to use if resizing the codebook image. Can be overridden by the `codebook_resample` parameter in `preprocess`. codebook_do_center_crop (`bool`, *optional*, defaults to `True`): Whether to crop the input for codebook at the center. If the input size is smaller than `codebook_crop_size` along any edge, the image is padded with 0's and then center cropped. Can be overridden by the `codebook_do_center_crop` parameter in `preprocess`. codebook_crop_size (`Dict[str, int]`, *optional*, defaults to `{"height": 224, "width": 224}`): Desired output size for codebook input when applying center-cropping. Can be overridden by the `codebook_crop_size` parameter in `preprocess`. codebook_do_rescale (`bool`, *optional*, defaults to `True`): Whether to rescale the input for codebook by the specified scale `codebook_rescale_factor`. Can be overridden by the `codebook_do_rescale` parameter in `preprocess`. codebook_rescale_factor (`int` or `float`, *optional*, defaults to `1/255`): Defines the scale factor to use if rescaling the codebook image. Can be overridden by the `codebook_rescale_factor` parameter in `preprocess`. codebook_do_map_pixels (`bool`, *optional*, defaults to `True`): Whether to map the pixel values of the codebook input to (1 - 2e)x + e. Can be overridden by the `codebook_do_map_pixels` parameter in `preprocess`. codebook_do_normalize (`bool`, *optional*, defaults to `True`): Whether or not to normalize the input for codebook with `codebook_image_mean` and `codebook_image_std`. Can be overridden by the `codebook_do_normalize` parameter in `preprocess`. codebook_image_mean (`Optional[Union[float, Iterable[float]]]`, *optional*, defaults to `[0, 0, 0]`): The sequence of means for each channel, to be used when normalizing images for codebook. Can be overridden by the `codebook_image_mean` parameter in `preprocess`. codebook_image_std (`Optional[Union[float, Iterable[float]]]`, *optional*, defaults to `[0.5, 0.5, 0.5]`): The sequence of standard deviations for each channel, to be used when normalizing images for codebook. Can be overridden by the `codebook_image_std` parameter in `preprocess`. """ model_input_names = ["pixel_values"] def __init__( self, do_resize: bool = True, size: Dict[str, int] = None, resample: PILImageResampling = PILImageResampling.BICUBIC, do_center_crop: bool = True, crop_size: Dict[str, int] = None, do_rescale: bool = True, rescale_factor: Union[int, float] = 1 / 255, do_normalize: bool = True, image_mean: Optional[Union[float, Iterable[float]]] = None, image_std: Optional[Union[float, Iterable[float]]] = None, # Mask related params return_image_mask: bool = False, input_size_patches: int = 14, total_mask_patches: int = 75, mask_group_min_patches: int = 16, mask_group_max_patches: Optional[int] = None, mask_group_min_aspect_ratio: float = 0.3, mask_group_max_aspect_ratio: Optional[float] = None, # Codebook related params return_codebook_pixels: bool = False, codebook_do_resize: bool = True, codebook_size: bool = None, codebook_resample: int = PILImageResampling.LANCZOS, codebook_do_center_crop: bool = True, codebook_crop_size: int = None, codebook_do_rescale: bool = True, codebook_rescale_factor: Union[int, float] = 1 / 255, codebook_do_map_pixels: bool = True, codebook_do_normalize: bool = True, codebook_image_mean: Optional[Union[float, Iterable[float]]] = None, codebook_image_std: Optional[Union[float, Iterable[float]]] = None, **kwargs, ) -> None: super().__init__(**kwargs) size = size if size is not None else {"height": 224, "width": 224} size = get_size_dict(size) crop_size = crop_size if crop_size is not None else {"height": 224, "width": 224} crop_size = get_size_dict(crop_size, param_name="crop_size") codebook_size = codebook_size if codebook_size is not None else {"height": 112, "width": 112} codebook_size = get_size_dict(codebook_size, param_name="codebook_size") codebook_crop_size = codebook_crop_size if codebook_crop_size is not None else {"height": 112, "width": 112} codebook_crop_size = get_size_dict(codebook_crop_size, param_name="codebook_crop_size") self.do_resize = do_resize self.size = size self.resample = resample self.do_rescale = do_rescale self.rescale_factor = rescale_factor self.do_center_crop = do_center_crop self.crop_size = crop_size self.do_normalize = do_normalize self.image_mean = image_mean if image_mean is not None else FLAVA_IMAGE_MEAN self.image_std = image_std if image_std is not None else FLAVA_IMAGE_STD self.return_image_mask = return_image_mask self.input_size_patches = input_size_patches self.total_mask_patches = total_mask_patches self.mask_group_min_patches = mask_group_min_patches self.mask_group_max_patches = mask_group_max_patches self.mask_group_min_aspect_ratio = mask_group_min_aspect_ratio self.mask_group_max_aspect_ratio = mask_group_max_aspect_ratio self.return_codebook_pixels = return_codebook_pixels self.codebook_do_resize = codebook_do_resize self.codebook_size = codebook_size self.codebook_resample = codebook_resample self.codebook_do_center_crop = codebook_do_center_crop self.codebook_crop_size = codebook_crop_size self.codebook_do_rescale = codebook_do_rescale self.codebook_rescale_factor = codebook_rescale_factor self.codebook_do_map_pixels = codebook_do_map_pixels self.codebook_do_normalize = codebook_do_normalize self.codebook_image_mean = codebook_image_mean self.codebook_image_mean = codebook_image_mean if codebook_image_mean is not None else FLAVA_CODEBOOK_MEAN self.codebook_image_std = codebook_image_std if codebook_image_std is not None else FLAVA_CODEBOOK_STD self._valid_processor_keys = [ "images", "do_resize", "size", "resample", "do_center_crop", "crop_size", "do_rescale", "rescale_factor", "do_normalize", "image_mean", "image_std", "return_image_mask", "input_size_patches", "total_mask_patches", "mask_group_min_patches", "mask_group_max_patches", "mask_group_min_aspect_ratio", "mask_group_max_aspect_ratio", "return_codebook_pixels", "codebook_do_resize", "codebook_size", "codebook_resample", "codebook_do_center_crop", "codebook_crop_size", "codebook_do_rescale", "codebook_rescale_factor", "codebook_do_map_pixels", "codebook_do_normalize", "codebook_image_mean", "codebook_image_std", "return_tensors", "data_format", "input_data_format", ] @classmethod def from_dict(cls, image_processor_dict: Dict[str, Any], **kwargs): """ Overrides the `from_dict` method from the base class to make sure parameters are updated if image processor is created using from_dict and kwargs e.g. `FlavaImageProcessor.from_pretrained(checkpoint, codebook_size=600)` """ image_processor_dict = image_processor_dict.copy() if "codebook_size" in kwargs: image_processor_dict["codebook_size"] = kwargs.pop("codebook_size") if "codebook_crop_size" in kwargs: image_processor_dict["codebook_crop_size"] = kwargs.pop("codebook_crop_size") return super().from_dict(image_processor_dict, **kwargs) @lru_cache() def masking_generator( self, input_size_patches, total_mask_patches, mask_group_min_patches, mask_group_max_patches, mask_group_min_aspect_ratio, mask_group_max_aspect_ratio, ) -> FlavaMaskingGenerator: return FlavaMaskingGenerator( input_size=input_size_patches, total_mask_patches=total_mask_patches, mask_group_min_patches=mask_group_min_patches, mask_group_max_patches=mask_group_max_patches, mask_group_min_aspect_ratio=mask_group_min_aspect_ratio, mask_group_max_aspect_ratio=mask_group_max_aspect_ratio, ) # Copied from transformers.models.vit.image_processing_vit.ViTImageProcessor.resize with PILImageResampling.BILINEAR->PILImageResampling.BICUBIC def resize( self, image: np.ndarray, size: Dict[str, int], resample: PILImageResampling = PILImageResampling.BICUBIC, data_format: Optional[Union[str, ChannelDimension]] = None, input_data_format: Optional[Union[str, ChannelDimension]] = None, **kwargs, ) -> np.ndarray: """ Resize an image to `(size["height"], size["width"])`. Args: image (`np.ndarray`): Image to resize. size (`Dict[str, int]`): Dictionary in the format `{"height": int, "width": int}` specifying the size of the output image. resample (`PILImageResampling`, *optional*, defaults to `PILImageResampling.BICUBIC`): `PILImageResampling` filter to use when resizing the image e.g. `PILImageResampling.BICUBIC`. data_format (`ChannelDimension` or `str`, *optional*): The channel dimension format for the output image. If unset, the channel dimension format of the input image is used. Can be one of: - `"channels_first"` or `ChannelDimension.FIRST`: image in (num_channels, height, width) format. - `"channels_last"` or `ChannelDimension.LAST`: image in (height, width, num_channels) format. - `"none"` or `ChannelDimension.NONE`: image in (height, width) format. input_data_format (`ChannelDimension` or `str`, *optional*): The channel dimension format for the input image. If unset, the channel dimension format is inferred from the input image. Can be one of: - `"channels_first"` or `ChannelDimension.FIRST`: image in (num_channels, height, width) format. - `"channels_last"` or `ChannelDimension.LAST`: image in (height, width, num_channels) format. - `"none"` or `ChannelDimension.NONE`: image in (height, width) format. Returns: `np.ndarray`: The resized image. """ size = get_size_dict(size) if "height" not in size or "width" not in size: raise ValueError(f"The `size` dictionary must contain the keys `height` and `width`. Got {size.keys()}") output_size = (size["height"], size["width"]) return resize( image, size=output_size, resample=resample, data_format=data_format, input_data_format=input_data_format, **kwargs, ) def map_pixels(self, image: np.ndarray) -> np.ndarray: return (1 - 2 * LOGIT_LAPLACE_EPS) * image + LOGIT_LAPLACE_EPS def _preprocess_image( self, image: ImageInput, do_resize: bool = None, size: Dict[str, int] = None, resample: PILImageResampling = None, do_center_crop: bool = None, crop_size: Dict[str, int] = None, do_rescale: bool = None, rescale_factor: float = None, do_normalize: bool = None, image_mean: Optional[Union[float, List[float]]] = None, image_std: Optional[Union[float, List[float]]] = None, do_map_pixels: bool = None, data_format: Optional[ChannelDimension] = ChannelDimension.FIRST, input_data_format: Optional[ChannelDimension] = None, ) -> np.ndarray: """Preprocesses a single image.""" validate_preprocess_arguments( do_rescale=do_rescale, rescale_factor=rescale_factor, do_normalize=do_normalize, image_mean=image_mean, image_std=image_std, do_center_crop=do_center_crop, crop_size=crop_size, do_resize=do_resize, size=size, resample=resample, ) # All transformations expect numpy arrays. image = to_numpy_array(image) if is_scaled_image(image) and do_rescale: logger.warning_once( "It looks like you are trying to rescale already rescaled images. If the input" " images have pixel values between 0 and 1, set `do_rescale=False` to avoid rescaling them again." ) if input_data_format is None: # We assume that all images have the same channel dimension format. input_data_format = infer_channel_dimension_format(image) if do_resize: image = self.resize(image=image, size=size, resample=resample, input_data_format=input_data_format) if do_center_crop: image = self.center_crop(image=image, size=crop_size, input_data_format=input_data_format) if do_rescale: image = self.rescale(image=image, scale=rescale_factor, input_data_format=input_data_format) if do_normalize: image = self.normalize(image=image, mean=image_mean, std=image_std, input_data_format=input_data_format) if do_map_pixels: image = self.map_pixels(image) if data_format is not None: image = to_channel_dimension_format(image, data_format, input_channel_dim=input_data_format) return image def preprocess( self, images: ImageInput, do_resize: Optional[bool] = None, size: Dict[str, int] = None, resample: PILImageResampling = None, do_center_crop: Optional[bool] = None, crop_size: Optional[Dict[str, int]] = None, do_rescale: Optional[bool] = None, rescale_factor: Optional[float] = None, do_normalize: Optional[bool] = None, image_mean: Optional[Union[float, List[float]]] = None, image_std: Optional[Union[float, List[float]]] = None, # Mask related params return_image_mask: Optional[bool] = None, input_size_patches: Optional[int] = None, total_mask_patches: Optional[int] = None, mask_group_min_patches: Optional[int] = None, mask_group_max_patches: Optional[int] = None, mask_group_min_aspect_ratio: Optional[float] = None, mask_group_max_aspect_ratio: Optional[float] = None, # Codebook related params return_codebook_pixels: Optional[bool] = None, codebook_do_resize: Optional[bool] = None, codebook_size: Optional[Dict[str, int]] = None, codebook_resample: Optional[int] = None, codebook_do_center_crop: Optional[bool] = None, codebook_crop_size: Optional[Dict[str, int]] = None, codebook_do_rescale: Optional[bool] = None, codebook_rescale_factor: Optional[float] = None, codebook_do_map_pixels: Optional[bool] = None, codebook_do_normalize: Optional[bool] = None, codebook_image_mean: Optional[Iterable[float]] = None, codebook_image_std: Optional[Iterable[float]] = None, return_tensors: Optional[Union[str, TensorType]] = None, data_format: ChannelDimension = ChannelDimension.FIRST, input_data_format: Optional[Union[str, ChannelDimension]] = None, **kwargs, ) -> PIL.Image.Image: """ Preprocess an image or batch of images. Args: images (`ImageInput`): Image to preprocess. Expects a single or batch of images with pixel values ranging from 0 to 255. If passing in images with pixel values between 0 and 1, set `do_rescale=False`. do_resize (`bool`, *optional*, defaults to `self.do_resize`): Whether to resize the image. size (`Dict[str, int]`, *optional*, defaults to `self.size`): Size of the image. resample (`int`, *optional*, defaults to `self.resample`): Resampling filter to use if resizing the image. This can be one of the enum `PILImageResampling`, Only has an effect if `do_resize` is set to `True`. do_center_crop (`bool`, *optional*, defaults to `self.do_center_crop`): Whether to center crop the image. crop_size (`Dict[str, int]`, *optional*, defaults to `self.crop_size`): Size of the center crop. Only has an effect if `do_center_crop` is set to `True`. do_rescale (`bool`, *optional*, defaults to `self.do_rescale`): Whether to rescale the image values between [0 - 1]. rescale_factor (`float`, *optional*, defaults to `self.rescale_factor`): Rescale factor to rescale the image by if `do_rescale` is set to `True`. do_normalize (`bool`, *optional*, defaults to `self.do_normalize`): Whether to normalize the image. image_mean (`float` or `List[float]`, *optional*, defaults to `self.image_mean`): Image mean. image_std (`float` or `List[float]`, *optional*, defaults to `self.image_std`): Image standard deviation. return_image_mask (`bool`, *optional*, defaults to `self.return_image_mask`): Whether to return the image mask. input_size_patches (`int`, *optional*, defaults to `self.input_size_patches`): Size of the patches to extract from the image. total_mask_patches (`int`, *optional*, defaults to `self.total_mask_patches`): Total number of patches to extract from the image. mask_group_min_patches (`int`, *optional*, defaults to `self.mask_group_min_patches`): Minimum number of patches to extract from the image. mask_group_max_patches (`int`, *optional*, defaults to `self.mask_group_max_patches`): Maximum number of patches to extract from the image. mask_group_min_aspect_ratio (`float`, *optional*, defaults to `self.mask_group_min_aspect_ratio`): Minimum aspect ratio of the patches to extract from the image. mask_group_max_aspect_ratio (`float`, *optional*, defaults to `self.mask_group_max_aspect_ratio`): Maximum aspect ratio of the patches to extract from the image. return_codebook_pixels (`bool`, *optional*, defaults to `self.return_codebook_pixels`): Whether to return the codebook pixels. codebook_do_resize (`bool`, *optional*, defaults to `self.codebook_do_resize`): Whether to resize the codebook pixels. codebook_size (`Dict[str, int]`, *optional*, defaults to `self.codebook_size`): Size of the codebook pixels. codebook_resample (`int`, *optional*, defaults to `self.codebook_resample`): Resampling filter to use if resizing the codebook pixels. This can be one of the enum `PILImageResampling`, Only has an effect if `codebook_do_resize` is set to `True`. codebook_do_center_crop (`bool`, *optional*, defaults to `self.codebook_do_center_crop`): Whether to center crop the codebook pixels. codebook_crop_size (`Dict[str, int]`, *optional*, defaults to `self.codebook_crop_size`): Size of the center crop of the codebook pixels. Only has an effect if `codebook_do_center_crop` is set to `True`. codebook_do_rescale (`bool`, *optional*, defaults to `self.codebook_do_rescale`): Whether to rescale the codebook pixels values between [0 - 1]. codebook_rescale_factor (`float`, *optional*, defaults to `self.codebook_rescale_factor`): Rescale factor to rescale the codebook pixels by if `codebook_do_rescale` is set to `True`. codebook_do_map_pixels (`bool`, *optional*, defaults to `self.codebook_do_map_pixels`): Whether to map the codebook pixels values. codebook_do_normalize (`bool`, *optional*, defaults to `self.codebook_do_normalize`): Whether to normalize the codebook pixels. codebook_image_mean (`float` or `List[float]`, *optional*, defaults to `self.codebook_image_mean`): Codebook pixels mean to normalize the codebook pixels by if `codebook_do_normalize` is set to `True`. codebook_image_std (`float` or `List[float]`, *optional*, defaults to `self.codebook_image_std`): Codebook pixels standard deviation to normalize the codebook pixels by if `codebook_do_normalize` is set to `True`. return_tensors (`str` or `TensorType`, *optional*): The type of tensors to return. Can be one of: - Unset: Return a list of `np.ndarray`. - `TensorType.TENSORFLOW` or `'tf'`: Return a batch of type `tf.Tensor`. - `TensorType.PYTORCH` or `'pt'`: Return a batch of type `torch.Tensor`. - `TensorType.NUMPY` or `'np'`: Return a batch of type `np.ndarray`. - `TensorType.JAX` or `'jax'`: Return a batch of type `jax.numpy.ndarray`. data_format (`ChannelDimension` or `str`, *optional*, defaults to `ChannelDimension.FIRST`): The channel dimension format for the output image. Can be one of: - `ChannelDimension.FIRST`: image in (num_channels, height, width) format. - `ChannelDimension.LAST`: image in (height, width, num_channels) format. input_data_format (`ChannelDimension` or `str`, *optional*): The channel dimension format for the input image. If unset, the channel dimension format is inferred from the input image. Can be one of: - `"channels_first"` or `ChannelDimension.FIRST`: image in (num_channels, height, width) format. - `"channels_last"` or `ChannelDimension.LAST`: image in (height, width, num_channels) format. - `"none"` or `ChannelDimension.NONE`: image in (height, width) format. """ do_resize = do_resize if do_resize is not None else self.do_resize size = size if size is not None else self.size size = get_size_dict(size) resample = resample if resample is not None else self.resample do_center_crop = do_center_crop if do_center_crop is not None else self.do_center_crop crop_size = crop_size if crop_size is not None else self.crop_size crop_size = get_size_dict(crop_size, param_name="crop_size") do_rescale = do_rescale if do_rescale is not None else self.do_rescale rescale_factor = rescale_factor if rescale_factor is not None else self.rescale_factor do_normalize = do_normalize if do_normalize is not None else self.do_normalize image_mean = image_mean if image_mean is not None else self.image_mean image_std = image_std if image_std is not None else self.image_std return_image_mask = return_image_mask if return_image_mask is not None else self.return_image_mask input_size_patches = input_size_patches if input_size_patches is not None else self.input_size_patches total_mask_patches = total_mask_patches if total_mask_patches is not None else self.total_mask_patches mask_group_min_patches = ( mask_group_min_patches if mask_group_min_patches is not None else self.mask_group_min_patches ) mask_group_max_patches = ( mask_group_max_patches if mask_group_max_patches is not None else self.mask_group_max_patches ) mask_group_min_aspect_ratio = ( mask_group_min_aspect_ratio if mask_group_min_aspect_ratio is not None else self.mask_group_min_aspect_ratio ) mask_group_max_aspect_ratio = ( mask_group_max_aspect_ratio if mask_group_max_aspect_ratio is not None else self.mask_group_max_aspect_ratio ) return_codebook_pixels = ( return_codebook_pixels if return_codebook_pixels is not None else self.return_codebook_pixels ) codebook_do_resize = codebook_do_resize if codebook_do_resize is not None else self.codebook_do_resize codebook_size = codebook_size if codebook_size is not None else self.codebook_size codebook_size = get_size_dict(codebook_size, param_name="codebook_size") codebook_resample = codebook_resample if codebook_resample is not None else self.codebook_resample codebook_do_rescale = codebook_do_rescale if codebook_do_rescale is not None else self.codebook_do_rescale codebook_rescale_factor = ( codebook_rescale_factor if codebook_rescale_factor is not None else self.codebook_rescale_factor ) codebook_do_center_crop = ( codebook_do_center_crop if codebook_do_center_crop is not None else self.codebook_do_center_crop ) codebook_crop_size = codebook_crop_size if codebook_crop_size is not None else self.codebook_crop_size codebook_crop_size = get_size_dict(codebook_crop_size, param_name="codebook_crop_size") codebook_do_map_pixels = ( codebook_do_map_pixels if codebook_do_map_pixels is not None else self.codebook_do_map_pixels ) codebook_do_normalize = ( codebook_do_normalize if codebook_do_normalize is not None else self.codebook_do_normalize ) codebook_image_mean = codebook_image_mean if codebook_image_mean is not None else self.codebook_image_mean codebook_image_std = codebook_image_std if codebook_image_std is not None else self.codebook_image_std images = make_list_of_images(images) validate_kwargs(captured_kwargs=kwargs.keys(), valid_processor_keys=self._valid_processor_keys) if not valid_images(images): raise ValueError( "Invalid image type. Must be of type PIL.Image.Image, numpy.ndarray, " "torch.Tensor, tf.Tensor or jax.ndarray." ) processed_images = [ self._preprocess_image( image=img, do_resize=do_resize, size=size, resample=resample, do_center_crop=do_center_crop, crop_size=crop_size, do_rescale=do_rescale, rescale_factor=rescale_factor, do_normalize=do_normalize, image_mean=image_mean, image_std=image_std, do_map_pixels=False, data_format=data_format, input_data_format=input_data_format, ) for img in images ] data = {"pixel_values": processed_images} if return_codebook_pixels: codebook_images = [ self._preprocess_image( image=img, do_resize=codebook_do_resize, size=codebook_size, resample=codebook_resample, do_center_crop=codebook_do_center_crop, crop_size=codebook_crop_size, do_rescale=codebook_do_rescale, rescale_factor=codebook_rescale_factor, do_normalize=codebook_do_normalize, image_mean=codebook_image_mean, image_std=codebook_image_std, do_map_pixels=codebook_do_map_pixels, data_format=data_format, input_data_format=input_data_format, ) for img in images ] data["codebook_pixel_values"] = codebook_images if return_image_mask: mask_generator = self.masking_generator( input_size_patches=input_size_patches, total_mask_patches=total_mask_patches, mask_group_min_patches=mask_group_min_patches, mask_group_max_patches=mask_group_max_patches, mask_group_min_aspect_ratio=mask_group_min_aspect_ratio, mask_group_max_aspect_ratio=mask_group_max_aspect_ratio, ) masks = [mask_generator() for _ in images] data["bool_masked_pos"] = masks return BatchFeature(data=data, tensor_type=return_tensors)

transformers/src/transformers/models/flava/image_processing_flava.py/0

{ "file_path": "transformers/src/transformers/models/flava/image_processing_flava.py", "repo_id": "transformers", "token_count": 16962 }

90

# coding=utf-8 # Copyright 2020 The Facebook AI Research Team Authors and The HuggingFace Inc. team. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. # # Original implementation: https://github.com/pytorch/fairseq/tree/master/examples/wmt19 # Authors: # - @alexeib Alexei Baevski # - @edunov Sergey Edunov # - @michaelauli Michael Auli # - @myleott Myle Ott # - @nng555 Nathan Ng # - David Grangier # - Kyra Yee # # Paper: Facebook FAIR's WMT19 News Translation Task Submission https://arxiv.org/abs/1907.06616 # """PyTorch Fairseq model, ported from https://github.com/pytorch/fairseq/tree/master/examples/wmt19""" import math from typing import Any, Dict, List, Optional, Tuple, Union import torch from torch import Tensor, nn from torch.nn import CrossEntropyLoss, LayerNorm from ...activations import ACT2FN from ...integrations.deepspeed import is_deepspeed_zero3_enabled from ...modeling_outputs import ( BaseModelOutput, BaseModelOutputWithPastAndCrossAttentions, Seq2SeqLMOutput, Seq2SeqModelOutput, ) from ...modeling_utils import PreTrainedModel from ...utils import ( add_code_sample_docstrings, add_end_docstrings, add_start_docstrings, add_start_docstrings_to_model_forward, logging, replace_return_docstrings, ) from .configuration_fsmt import FSMTConfig logger = logging.get_logger(__name__) _CHECKPOINT_FOR_DOC = "facebook/wmt19-ru-en" _CONFIG_FOR_DOC = "FSMTConfig" # See all FSMT models at https://huggingface.co/models?filter=fsmt # Porting notes: # this one is modeled after BartModel* # # Currently only translation (fairseq also has weights for LM) # # fairseq provides weights for ru-en, en-ru and de-en, en-de pairs. All have been ported. # - ru-en, en-ru use asymmetric vocab # - de-en, en-de use a merged single vocab (but the code works as if they are separate) # # Differences with Bart: # - not using bos token # - 2 separate vocabs (src and target) # - embed weights aren't tied # - uses a model Ensemble (but that part isn't ported/implemented yet) - so we # aren't getting as good of a BLEU score # - uses a projection layer at the end of the decoder # - doesn't use final_logits_bias # - beam search: stops as soon as num_beams == len(hypos) (whereas transformers # is not satisfied there and will continue searching until the next cycles # aren't promising something better), comparing BLEU scores - the transformers # algorithm is slightly superior, therefore using the latter. But if you want # to match fairseq outputs, you need to pass ``early_stopping=True`` to ``generate()``. # # SinusoidalPositionalEmbedding is slightly different from Bart's - generates # different embeddings. This implementation is copied verbatim from fairseq with # some small changes to make it work here. # # Other changes: # - doesn't support use_cache as Bart's version does # # # FSMTConfig changes with BartConfig # # Differences with BART: # - src/tgt vocabs aren't shared # - token embeddings aren't shared # - needs a language pair # - scale_embedding are True # # some unused args were removed too # # # TODO: # - port model ensemble (fs uses 4 model checkpoints) # - solve beam search discrepancies # docstyle-ignore """ Here is how to compare BLEU scores against fairseq implementation: # en-ru export PAIR=en-ru export DATA_DIR=data/$PAIR export SAVE_DIR=data/$PAIR export BS=8 export NUM_BEAMS=50 mkdir -p $DATA_DIR sacrebleu -t wmt19 -l $PAIR --echo src > $DATA_DIR/val.source sacrebleu -t wmt19 -l $PAIR --echo ref > $DATA_DIR/val.target echo $PAIR PYTHONPATH="src:examples/seq2seq" python examples/seq2seq/run_eval.py facebook/wmt19-$PAIR $DATA_DIR/val.source $SAVE_DIR/test_translations.txt --reference_path $DATA_DIR/val.target --score_path $SAVE_DIR/test_bleu.json --bs $BS --task translation --num_beams $NUM_BEAMS # (fairseq BLEU: 36.4 http://matrix.statmt.org/matrix/output/1914?score_id=37605) # ru-en export PAIR=ru-en export DATA_DIR=data/$PAIR export SAVE_DIR=data/$PAIR export BS=8 export NUM_BEAMS=50 mkdir -p $DATA_DIR sacrebleu -t wmt19 -l $PAIR --echo src > $DATA_DIR/val.source sacrebleu -t wmt19 -l $PAIR --echo ref > $DATA_DIR/val.target PYTHONPATH="src:examples/seq2seq" python examples/seq2seq/run_eval.py facebook/wmt19-$PAIR $DATA_DIR/val.source $SAVE_DIR/test_translations.txt --reference_path $DATA_DIR/val.target --score_path $SAVE_DIR/test_bleu.json --bs $BS --task translation --num_beams $NUM_BEAMS # (fairseq BLEU: 41.3 http://matrix.statmt.org/matrix/output/1907?run_id=6937) # de-en export PAIR=de-en export DATA_DIR=data/$PAIR export SAVE_DIR=data/$PAIR export BS=8 export NUM_BEAMS=50 mkdir -p $DATA_DIR sacrebleu -t wmt19 -l $PAIR --echo src > $DATA_DIR/val.source sacrebleu -t wmt19 -l $PAIR --echo ref > $DATA_DIR/val.target echo $PAIR PYTHONPATH="src:examples/seq2seq" python examples/seq2seq/run_eval.py facebook/wmt19-$PAIR $DATA_DIR/val.source $SAVE_DIR/test_translations.txt --reference_path $DATA_DIR/val.target --score_path $SAVE_DIR/test_bleu.json --bs $BS --task translation --num_beams $NUM_BEAMS # (fairseq BLEU: 42.3 http://matrix.statmt.org/matrix/output/1902?run_id=6750) # en-de export PAIR=en-de export DATA_DIR=data/$PAIR export SAVE_DIR=data/$PAIR export BS=8 mkdir -p $DATA_DIR sacrebleu -t wmt19 -l $PAIR --echo src > $DATA_DIR/val.source sacrebleu -t wmt19 -l $PAIR --echo ref > $DATA_DIR/val.target echo $PAIR PYTHONPATH="src:examples/seq2seq" python examples/seq2seq/run_eval.py facebook/wmt19-$PAIR $DATA_DIR/val.source $SAVE_DIR/test_translations.txt --reference_path $DATA_DIR/val.target --score_path $SAVE_DIR/test_bleu.json --bs $BS --task translation --num_beams $NUM_BEAMS # (fairseq BLEU: 43.1 http://matrix.statmt.org/matrix/output/1909?run_id=6862) """ FSMT_START_DOCSTRING = r""" This model inherits from [`PreTrainedModel`]. Check the superclass documentation for the generic methods the library implements for all its model (such as downloading or saving, resizing the input embeddings, pruning heads etc.) This model is also a PyTorch [torch.nn.Module](https://pytorch.org/docs/stable/nn.html#torch.nn.Module) subclass. Use it as a regular PyTorch Module and refer to the PyTorch documentation for all matter related to general usage and behavior. Parameters: config ([`FSMTConfig`]): Model configuration class with all the parameters of the model. Initializing with a config file does not load the weights associated with the model, only the configuration. Check out the [`~PreTrainedModel.from_pretrained`] method to load the model weights. """ FSMT_GENERATION_EXAMPLE = r""" Translation example:: ```python >>> from transformers import AutoTokenizer, FSMTForConditionalGeneration >>> mname = "facebook/wmt19-ru-en" >>> model = FSMTForConditionalGeneration.from_pretrained(mname) >>> tokenizer = AutoTokenizer.from_pretrained(mname) >>> src_text = "Машинное обучение - это здорово, не так ли?" >>> input_ids = tokenizer(src_text, return_tensors="pt").input_ids >>> outputs = model.generate(input_ids, num_beams=5, num_return_sequences=3) >>> tokenizer.decode(outputs[0], skip_special_tokens=True) "Machine learning is great, isn't it?" ``` """ FSMT_INPUTS_DOCSTRING = r""" Args: input_ids (`torch.LongTensor` of shape `(batch_size, sequence_length)`): Indices of input sequence tokens in the vocabulary. Indices can be obtained using [`FSTMTokenizer`]. See [`PreTrainedTokenizer.encode`] and [`PreTrainedTokenizer.__call__`] for details. [What are input IDs?](../glossary#input-ids) attention_mask (`torch.Tensor` of shape `(batch_size, sequence_length)`, *optional*): Mask to avoid performing attention on padding token indices. Mask values selected in `[0, 1]`: - 1 for tokens that are **not masked**, - 0 for tokens that are **masked**. [What are attention masks?](../glossary#attention-mask) decoder_input_ids (`torch.LongTensor` of shape `(batch_size, target_sequence_length)`, *optional*): Indices of decoder input sequence tokens in the vocabulary. Indices can be obtained using [`AutoTokenizer`]. See [`PreTrainedTokenizer.encode`] and [`PreTrainedTokenizer.__call__`] for details. [What are decoder input IDs?](../glossary#decoder-input-ids) FSMT uses the `eos_token_id` as the starting token for `decoder_input_ids` generation. If `past_key_values` is used, optionally only the last `decoder_input_ids` have to be input (see `past_key_values`). decoder_attention_mask (`torch.BoolTensor` of shape `(batch_size, target_sequence_length)`, *optional*): Default behavior: generate a tensor that ignores pad tokens in `decoder_input_ids`. Causal mask will also be used by default. head_mask (`torch.Tensor` of shape `(encoder_layers, encoder_attention_heads)`, *optional*): Mask to nullify selected heads of the attention modules in the encoder. Mask values selected in `[0, 1]`: - 1 indicates the head is **not masked**, - 0 indicates the head is **masked**. decoder_head_mask (`torch.Tensor` of shape `(decoder_layers, decoder_attention_heads)`, *optional*): Mask to nullify selected heads of the attention modules in the decoder. Mask values selected in `[0, 1]`: - 1 indicates the head is **not masked**, - 0 indicates the head is **masked**. cross_attn_head_mask (`torch.Tensor` of shape `(decoder_layers, decoder_attention_heads)`, *optional*): Mask to nullify selected heads of the cross-attention modules in the decoder. Mask values selected in `[0, 1]`: - 1 indicates the head is **not masked**, - 0 indicates the head is **masked**. encoder_outputs (`Tuple(torch.FloatTensor)`, *optional*): Tuple consists of (`last_hidden_state`, *optional*: `hidden_states`, *optional*: `attentions`) `last_hidden_state` of shape `(batch_size, sequence_length, hidden_size)` is a sequence of hidden-states at the output of the last layer of the encoder. Used in the cross-attention of the decoder. past_key_values (`Tuple(torch.FloatTensor)` of length `config.n_layers` with each tuple having 4 tensors of shape `(batch_size, num_heads, sequence_length - 1, embed_size_per_head)`): Contains precomputed key and value hidden-states of the attention blocks. Can be used to speed up decoding. If `past_key_values` are used, the user can optionally input only the last `decoder_input_ids` (those that don't have their past key value states given to this model) of shape `(batch_size, 1)` instead of all `decoder_input_ids` of shape `(batch_size, sequence_length)`. inputs_embeds (`torch.FloatTensor` of shape `(batch_size, sequence_length, hidden_size)`, *optional*): Optionally, instead of passing `input_ids` you can choose to directly pass an embedded representation. This is useful if you want more control over how to convert `input_ids` indices into associated vectors than the model's internal embedding lookup matrix. decoder_inputs_embeds (`torch.FloatTensor` of shape `(batch_size, target_sequence_length, hidden_size)`, *optional*): Optionally, instead of passing `decoder_input_ids` you can choose to directly pass an embedded representation. If `past_key_values` is used, optionally only the last `decoder_inputs_embeds` have to be input (see `past_key_values`). This is useful if you want more control over how to convert `decoder_input_ids` indices into associated vectors than the model's internal embedding lookup matrix. If `decoder_input_ids` and `decoder_inputs_embeds` are both unset, `decoder_inputs_embeds` takes the value of `inputs_embeds`. use_cache (`bool`, *optional*, defaults to `True`): If set to `True`, `past_key_values` key value states are returned and can be used to speed up decoding (see `past_key_values`). output_attentions (`bool`, *optional*): Whether or not to return the attentions tensors of all attention layers. See `attentions` under returned tensors for more detail. output_hidden_states (`bool`, *optional*): Whether or not to return the hidden states of all layers. See `hidden_states` under returned tensors for more detail. return_dict (`bool`, *optional*): Whether or not to return a [`~utils.ModelOutput`] instead of a plain tuple. """ def invert_mask(attention_mask): """Turns 1->0, 0->1, False->True, True-> False""" assert attention_mask.dim() == 2 return attention_mask.eq(0) def triu_onnx(x, diagonal=0): l = x.shape[0] arange = torch.arange(l, device=x.device) mask = arange.expand(l, l) arange = arange.unsqueeze(-1) if diagonal: arange = arange + diagonal mask = mask >= arange return x.masked_fill(mask == 0, 0) def _prepare_fsmt_decoder_inputs( config, input_ids, decoder_input_ids=None, decoder_padding_mask=None, causal_mask_dtype=torch.float32, ): """ Prepare masks that ignore padding tokens in the decoder and a causal mask for the decoder if none are provided. This mimics the default behavior in fairseq. To override it pass in masks. Note: this is not called during generation """ pad_token_id = config.pad_token_id if decoder_input_ids is None: decoder_input_ids = shift_tokens_right(input_ids, pad_token_id) bsz, tgt_len = decoder_input_ids.size() if decoder_padding_mask is None: decoder_padding_mask = make_padding_mask(decoder_input_ids, pad_token_id) else: decoder_padding_mask = invert_mask(decoder_padding_mask) causal_mask = triu_onnx(fill_with_neg_inf(torch.zeros(tgt_len, tgt_len, dtype=causal_mask_dtype)), 1).to( device=decoder_input_ids.device ) return decoder_input_ids, decoder_padding_mask, causal_mask class PretrainedFSMTModel(PreTrainedModel): config_class = FSMTConfig base_model_prefix = "model" def _init_weights(self, module): std = self.config.init_std if isinstance(module, nn.Linear): module.weight.data.normal_(mean=0.0, std=std) if module.bias is not None: module.bias.data.zero_() elif isinstance(module, SinusoidalPositionalEmbedding): pass elif isinstance(module, nn.Embedding): module.weight.data.normal_(mean=0.0, std=std) if module.padding_idx is not None: module.weight.data[module.padding_idx].zero_() @property def dummy_inputs(self): pad_token = self.config.pad_token_id input_ids = torch.tensor([[0, 6, 10, 4, 2], [0, 8, 12, 2, pad_token]], device=self.device) dummy_inputs = { "attention_mask": input_ids.ne(pad_token), "input_ids": input_ids, } return dummy_inputs def _make_linear_from_emb(emb): vocab_size, emb_size = emb.weight.shape lin_layer = nn.Linear(vocab_size, emb_size, bias=False) lin_layer.weight.data = emb.weight.data return lin_layer # Helper Functions, mostly for making masks def _check_shapes(shape_1, shape2): if shape_1 != shape2: raise AssertionError(f"shape mismatch: {shape_1} != {shape2}") def shift_tokens_right(input_ids, pad_token_id): """Shift input ids one token to the right, and wrap the last non pad token (usually <eos>).""" # replace possible -100 values in labels by `pad_token_id` input_ids.masked_fill_(input_ids == -100, pad_token_id) prev_output_tokens = input_ids.clone() index_of_eos = (input_ids.ne(pad_token_id).sum(dim=1) - 1).unsqueeze(-1) prev_output_tokens[:, 0] = input_ids.gather(1, index_of_eos).squeeze() prev_output_tokens[:, 1:] = input_ids[:, :-1] return prev_output_tokens def make_padding_mask(input_ids, padding_idx=1): """True for pad tokens""" padding_mask = input_ids.eq(padding_idx) if not padding_mask.any(): padding_mask = None return padding_mask # Helper Modules class EncoderLayer(nn.Module): def __init__(self, config: FSMTConfig): super().__init__() self.embed_dim = config.d_model self.self_attn = Attention(self.embed_dim, config.encoder_attention_heads, dropout=config.attention_dropout) self.self_attn_layer_norm = LayerNorm(self.embed_dim) self.dropout = config.dropout self.activation_fn = ACT2FN[config.activation_function] self.activation_dropout = config.activation_dropout self.fc1 = nn.Linear(self.embed_dim, config.encoder_ffn_dim) self.fc2 = nn.Linear(config.encoder_ffn_dim, self.embed_dim) self.final_layer_norm = LayerNorm(self.embed_dim) def forward(self, x, encoder_padding_mask, layer_head_mask, output_attentions=False): """ Args: x (`torch.Tensor`): input to the layer of shape *(seq_len, batch, embed_dim)* encoder_padding_mask (`torch.ByteTensor`): binary ByteTensor of shape *(batch, src_len)* where padding elements are indicated by `1`. for t_tgt, t_src is excluded (or masked out), =0 means it is included in attention layer_head_mask (`torch.FloatTensor`): mask for attention heads in a given layer of size *(config.encoder_attention_heads,)*. Returns: encoded output of shape *(seq_len, batch, embed_dim)* """ residual = x x, attn_weights = self.self_attn( query=x, key=x, key_padding_mask=encoder_padding_mask, layer_head_mask=layer_head_mask, output_attentions=output_attentions, ) x = nn.functional.dropout(x, p=self.dropout, training=self.training) x = residual + x x = self.self_attn_layer_norm(x) residual = x x = self.activation_fn(self.fc1(x)) x = nn.functional.dropout(x, p=self.activation_dropout, training=self.training) x = self.fc2(x) x = nn.functional.dropout(x, p=self.dropout, training=self.training) x = residual + x x = self.final_layer_norm(x) return x, attn_weights class FSMTEncoder(nn.Module): """ Transformer encoder consisting of *config.encoder_layers* self attention layers. Each layer is a [`EncoderLayer`]. Args: config: FSMTConfig """ def __init__(self, config: FSMTConfig, embed_tokens): super().__init__() self.dropout = config.dropout self.layerdrop = config.encoder_layerdrop self.padding_idx = embed_tokens.padding_idx self.embed_tokens = embed_tokens embed_dim = embed_tokens.embedding_dim self.embed_scale = math.sqrt(embed_dim) if config.scale_embedding else 1.0 self.embed_positions = SinusoidalPositionalEmbedding( config.max_position_embeddings + self.padding_idx + 1, embed_dim, self.padding_idx ) self.layers = nn.ModuleList([EncoderLayer(config) for _ in range(config.encoder_layers)]) # type: List[EncoderLayer] def forward( self, input_ids: torch.Tensor, attention_mask: Optional[torch.Tensor] = None, inputs_embeds: torch.Tensor = None, head_mask: Optional[torch.Tensor] = None, output_attentions: bool = False, output_hidden_states: bool = False, return_dict: bool = True, ): """ Args: input_ids (`torch.LongTensor`): tokens in the source language of shape *(batch, src_len)* attention_mask (`torch.LongTensor`): indicating which indices are padding tokens inputs_embeds (`torch.FloatTensor`): embedding vectors of shape *(batch, src_len, embed_dim)* head_mask (`torch.Tensor` of shape `(num_layers, num_heads)`, *optional*): Mask to nullify selected heads of the attention modules. Mask values selected in `[0, 1]`: - 1 indicates the head is **not masked**, - 0 indicates the head is **masked**. Returns: BaseModelOutput or Tuple comprised of: - **x** (`torch.Tensor`): the last encoder layer's output of shape *(src_len, batch, embed_dim)* - **encoder_states** (`Tuple(torch.FloatTensor`)): all intermediate hidden states of shape *(src_len, batch, embed_dim)*. Only populated if *output_hidden_states:* is True. - **all_attentions** (`Tuple(torch.FloatTensor`)): Attention weights for each layer. During training might not be of length n_layers because of layer dropout. """ # check attention mask and invert if attention_mask is not None: attention_mask = invert_mask(attention_mask) if input_ids is not None and inputs_embeds is not None: raise ValueError("You cannot specify both input_ids and inputs_embeds at the same time") elif input_ids is not None: inputs_embeds = self.embed_tokens(input_ids) * self.embed_scale embed_pos = self.embed_positions(input_ids) elif inputs_embeds is not None: inputs_embeds = inputs_embeds * self.embed_scale # We assume zeros hidden states correspond to padding tokens # and create `position_ids` where inputs_embeds[:, :, 0] == 0 position_ids = inputs_embeds[:, :, 0].masked_fill( inputs_embeds[:, :, 0].eq(0), self.embed_positions.padding_idx ) embed_pos = self.embed_positions(position_ids) else: raise ValueError("You have to specify either input_ids or inputs_embeds") x = inputs_embeds + embed_pos x = nn.functional.dropout(x, p=self.dropout, training=self.training) # B x T x C -> T x B x C x = x.transpose(0, 1) encoder_states = () if output_hidden_states else None all_attentions = () if output_attentions else None # check if head_mask has a correct number of layers specified if desired if head_mask is not None: assert head_mask.size()[0] == ( len(self.layers) ), f"The head_mask should be specified for {len(self.layers)} layers, but it is for {head_mask.size()[0]}." for idx, encoder_layer in enumerate(self.layers): if output_hidden_states: x = x.transpose(0, 1) # T x B x C -> B x T x C encoder_states += (x,) x = x.transpose(0, 1) # B x T x C -> T x B x C # add LayerDrop (see https://arxiv.org/abs/1909.11556 for description) dropout_probability = torch.rand([]) if self.training and (dropout_probability < self.layerdrop): # skip the layer attn = None else: x, attn = encoder_layer( x, attention_mask, layer_head_mask=(head_mask[idx] if head_mask is not None else None), output_attentions=output_attentions, ) if output_attentions: all_attentions = all_attentions + (attn,) # T x B x C -> B x T x C x = x.transpose(0, 1) if output_hidden_states: encoder_states += (x,) if not return_dict: return tuple(v for v in [x, encoder_states, all_attentions] if v is not None) return BaseModelOutput(last_hidden_state=x, hidden_states=encoder_states, attentions=all_attentions) class DecoderLayer(nn.Module): def __init__(self, config: FSMTConfig): super().__init__() self.embed_dim = config.d_model self.self_attn = Attention( embed_dim=self.embed_dim, num_heads=config.decoder_attention_heads, dropout=config.attention_dropout, ) self.dropout = config.dropout self.activation_fn = ACT2FN[config.activation_function] self.activation_dropout = config.activation_dropout self.self_attn_layer_norm = LayerNorm(self.embed_dim) self.encoder_attn = Attention( self.embed_dim, config.decoder_attention_heads, dropout=config.attention_dropout, encoder_decoder_attention=True, ) self.encoder_attn_layer_norm = LayerNorm(self.embed_dim) self.fc1 = nn.Linear(self.embed_dim, config.decoder_ffn_dim) self.fc2 = nn.Linear(config.decoder_ffn_dim, self.embed_dim) self.final_layer_norm = LayerNorm(self.embed_dim) def forward( self, x, encoder_hidden_states, encoder_attn_mask=None, layer_state=None, causal_mask=None, layer_head_mask=None, cross_attn_layer_head_mask=None, decoder_padding_mask=None, output_attentions=False, ): residual = x if layer_state is None: layer_state = {} # Self Attention x, self_attn_weights = self.self_attn( query=x, key=x, layer_state=layer_state, # adds keys to layer state key_padding_mask=decoder_padding_mask, attn_mask=causal_mask, layer_head_mask=layer_head_mask, output_attentions=output_attentions, ) x = nn.functional.dropout(x, p=self.dropout, training=self.training) x = residual + x x = self.self_attn_layer_norm(x) # Cross attention residual = x assert self.encoder_attn.cache_key != self.self_attn.cache_key x, cross_attn_weights = self.encoder_attn( query=x, key=encoder_hidden_states, key_padding_mask=encoder_attn_mask, layer_state=layer_state, # mutates layer state layer_head_mask=cross_attn_layer_head_mask, output_attentions=output_attentions, ) x = nn.functional.dropout(x, p=self.dropout, training=self.training) x = residual + x x = self.encoder_attn_layer_norm(x) # Fully Connected residual = x x = self.activation_fn(self.fc1(x)) x = nn.functional.dropout(x, p=self.activation_dropout, training=self.training) x = self.fc2(x) x = nn.functional.dropout(x, p=self.dropout, training=self.training) x = residual + x x = self.final_layer_norm(x) return ( x, self_attn_weights, layer_state, cross_attn_weights, ) # layer_state = cache for decoding class FSMTDecoder(nn.Module): """ Transformer decoder consisting of *config.decoder_layers* layers. Each layer is a [`DecoderLayer`] Args: config: FSMTConfig embed_tokens (nn.Embedding): output embedding """ def __init__(self, config: FSMTConfig, embed_tokens: nn.Embedding): super().__init__() self.dropout = config.dropout self.layerdrop = config.decoder_layerdrop self.padding_idx = embed_tokens.padding_idx self.embed_scale = math.sqrt(config.d_model) if config.scale_embedding else 1.0 self.embed_tokens = embed_tokens embed_dim = embed_tokens.embedding_dim self.embed_positions = SinusoidalPositionalEmbedding( config.max_position_embeddings + self.padding_idx + 1, embed_dim, self.padding_idx ) self.layers = nn.ModuleList([DecoderLayer(config) for _ in range(config.decoder_layers)]) # type: List[DecoderLayer] if is_deepspeed_zero3_enabled(): import deepspeed with deepspeed.zero.GatheredParameters(self.embed_tokens.weight, modifier_rank=None): embed_tokens_weight_shape = self.embed_tokens.weight.shape else: embed_tokens_weight_shape = self.embed_tokens.weight.shape self.output_projection = nn.Linear(embed_tokens_weight_shape[1], embed_tokens_weight_shape[0], bias=False) self.output_projection.weight = self.embed_tokens.weight def forward( self, input_ids: torch.Tensor, encoder_hidden_states: torch.Tensor, encoder_padding_mask: torch.Tensor, decoder_padding_mask: torch.Tensor, decoder_causal_mask: torch.Tensor, head_mask: Optional[torch.Tensor] = None, inputs_embeds: Optional[torch.Tensor] = None, cross_attn_head_mask: Optional[torch.Tensor] = None, past_key_values: Optional[List[torch.FloatTensor]] = None, use_cache: bool = False, output_attentions: bool = False, output_hidden_states: bool = False, return_dict: bool = True, ): """ Includes several features from "Jointly Learning to Align and Translate with Transformer Models" (Garg et al., EMNLP 2019). Args: input_ids (`torch.LongTensor` of shape `(batch, tgt_len)`): previous decoder outputs for teacher forcing encoder_hidden_states: output from the encoder, used for encoder-side attention encoder_padding_mask: for ignoring pad tokens past_key_values (dict or None): dictionary used for storing state during generation head_mask (`torch.Tensor` of shape `(num_layers, num_heads)`, *optional*): Mask to nullify selected heads of the attention modules. Mask values selected in `[0, 1]`: - 1 indicates the head is **not masked**, - 0 indicates the head is **masked**. cross_attn_head_mask (`torch.Tensor` of shape `(num_layers, num_heads)`, *optional*): Mask to nullify selected heads of the cross-attention modules. Mask values selected in `[0, 1]`: - 1 indicates the head is **not masked**, - 0 indicates the head is **masked**. Returns: BaseModelOutputWithPast or tuple: - the decoder's features of shape *(batch, tgt_len, embed_dim)* - the cache - hidden states - attentions """ # check attention mask and invert if encoder_padding_mask is not None: encoder_padding_mask = invert_mask(encoder_padding_mask) if input_ids is not None and inputs_embeds is not None: raise ValueError("You cannot specify both decoder_input_ids and decoder_inputs_embeds at the same time") elif input_ids is not None: # embed positions positions = self.embed_positions(input_ids) if use_cache: input_ids = input_ids[:, -1:] positions = positions[:, -1:] # happens after we embed them x = self.embed_tokens(input_ids) * self.embed_scale elif inputs_embeds is not None: # We assume zeros hidden states correspond to padding tokens # and create `position_ids` where inputs_embeds[:, :, 0] == 0 position_ids = inputs_embeds[:, :, 0].masked_fill( inputs_embeds[:, :, 0].eq(0), self.embed_positions.padding_idx ) positions = self.embed_positions(position_ids) x = inputs_embeds * self.embed_scale else: raise ValueError("You have to specify either decoder_input_ids or decoder_inputs_embeds") x += positions x = nn.functional.dropout(x, p=self.dropout, training=self.training) # Convert to FSMT output format: (BS, seq_len, model_dim) -> (seq_len, BS, model_dim) x = x.transpose(0, 1) encoder_hidden_states = encoder_hidden_states.transpose(0, 1) # decoder layers all_hidden_states = () if output_hidden_states else None all_self_attns = () if output_attentions else None all_cross_attns = () if output_attentions else None next_decoder_cache = [] # check if head_mask has a correct number of layers specified if desired for attn_mask, mask_name in zip([head_mask, cross_attn_head_mask], ["head_mask", "cross_attn_head_mask"]): if attn_mask is not None: assert attn_mask.size()[0] == (len(self.layers)), ( f"The `{mask_name}` should be specified for {len(self.layers)} layers, but it is for" f" {head_mask.size()[0]}." ) for idx, decoder_layer in enumerate(self.layers): # add LayerDrop (see https://arxiv.org/abs/1909.11556 for description) if output_hidden_states: x = x.transpose(0, 1) all_hidden_states += (x,) x = x.transpose(0, 1) if self.training: dropout_probability = torch.rand([]) if dropout_probability < self.layerdrop: continue layer_state = past_key_values[idx] if past_key_values is not None else None x, layer_self_attn, layer_past, layer_cross_attn = decoder_layer( x, encoder_hidden_states, encoder_attn_mask=encoder_padding_mask, decoder_padding_mask=decoder_padding_mask, layer_state=layer_state, causal_mask=decoder_causal_mask, layer_head_mask=(head_mask[idx] if head_mask is not None else None), cross_attn_layer_head_mask=(cross_attn_head_mask[idx] if cross_attn_head_mask is not None else None), output_attentions=output_attentions, ) if use_cache: next_decoder_cache.append(layer_past.copy()) if output_attentions: all_self_attns += (layer_self_attn,) all_cross_attns += (layer_cross_attn,) # add hidden states from the last decoder layer if output_hidden_states: x = x.transpose(0, 1) all_hidden_states += (x,) x = x.transpose(0, 1) # Convert to standard output format: (seq_len, BS, model_dim) -> (BS, seq_len, model_dim) x = x.transpose(0, 1) encoder_hidden_states = encoder_hidden_states.transpose(0, 1) x = self.output_projection(x) next_cache = next_decoder_cache if use_cache else None if not return_dict: return tuple( v for v in [x, next_cache, all_hidden_states, all_self_attns, all_cross_attns] if v is not None ) return BaseModelOutputWithPastAndCrossAttentions( last_hidden_state=x, past_key_values=next_cache, hidden_states=all_hidden_states, attentions=all_self_attns, cross_attentions=all_cross_attns, ) def _reorder_buffer(attn_cache, new_order): for k, input_buffer_k in attn_cache.items(): if input_buffer_k is not None: attn_cache[k] = input_buffer_k.index_select(0, new_order) return attn_cache class Attention(nn.Module): """Multi-headed attention from 'Attention Is All You Need' paper""" def __init__( self, embed_dim, num_heads, dropout=0.0, bias=True, encoder_decoder_attention=False, # otherwise self_attention ): super().__init__() self.embed_dim = embed_dim self.num_heads = num_heads self.dropout = dropout self.head_dim = embed_dim // num_heads assert self.head_dim * num_heads == self.embed_dim, "embed_dim must be divisible by num_heads" self.scaling = self.head_dim**-0.5 self.encoder_decoder_attention = encoder_decoder_attention self.k_proj = nn.Linear(embed_dim, embed_dim, bias=bias) self.v_proj = nn.Linear(embed_dim, embed_dim, bias=bias) self.q_proj = nn.Linear(embed_dim, embed_dim, bias=bias) self.out_proj = nn.Linear(embed_dim, embed_dim, bias=bias) self.cache_key = "encoder_decoder" if self.encoder_decoder_attention else "self" def _shape(self, tensor, seq_len, bsz): return tensor.contiguous().view(seq_len, bsz * self.num_heads, self.head_dim).transpose(0, 1) def forward( self, query, key: Optional[Tensor], key_padding_mask: Optional[Tensor] = None, layer_state: Optional[Dict[str, Optional[Tensor]]] = None, attn_mask: Optional[Tensor] = None, layer_head_mask: Optional[Tensor] = None, output_attentions=False, ) -> Tuple[Tensor, Optional[Tensor]]: """Input shape: Time(SeqLen) x Batch x Channel""" static_kv: bool = self.encoder_decoder_attention tgt_len, bsz, embed_dim = query.size() assert embed_dim == self.embed_dim assert list(query.size()) == [tgt_len, bsz, embed_dim] # get here for encoder decoder cause of static_kv if layer_state is not None: # reuse k,v and encoder_padding_mask saved_state = layer_state.get(self.cache_key, {}) if "prev_key" in saved_state and static_kv: # previous time steps are cached - no need to recompute key and value if they are static key = None else: saved_state = None layer_state = {} q = self.q_proj(query) * self.scaling if static_kv: if key is None: k = v = None else: k = self.k_proj(key) v = self.v_proj(key) else: k = self.k_proj(query) v = self.v_proj(query) q = self._shape(q, tgt_len, bsz) if k is not None: k = self._shape(k, -1, bsz) if v is not None: v = self._shape(v, -1, bsz) if saved_state is not None: k, v, key_padding_mask = self._use_saved_state(k, v, saved_state, key_padding_mask, static_kv, bsz) # Update cache layer_state[self.cache_key] = { "prev_key": k.view(bsz, self.num_heads, -1, self.head_dim), "prev_value": v.view(bsz, self.num_heads, -1, self.head_dim), "prev_key_padding_mask": key_padding_mask if not static_kv else None, } assert k is not None src_len = k.size(1) attn_weights = torch.bmm(q, k.transpose(1, 2)) assert attn_weights.size() == (bsz * self.num_heads, tgt_len, src_len) if attn_mask is not None: attn_weights = attn_weights.view(bsz, self.num_heads, tgt_len, src_len) + attn_mask attn_weights = attn_weights.view(bsz * self.num_heads, tgt_len, src_len) # This is part of a workaround to get around fork/join parallelism not supporting Optional types. if key_padding_mask is not None and key_padding_mask.dim() == 0: key_padding_mask = None assert key_padding_mask is None or key_padding_mask.size()[:2] == ( bsz, src_len, ) if key_padding_mask is not None: # don't attend to padding symbols attn_weights = attn_weights.view(bsz, self.num_heads, tgt_len, src_len) reshaped = key_padding_mask.unsqueeze(1).unsqueeze(2) attn_weights = attn_weights.masked_fill(reshaped, torch.finfo(attn_weights.dtype).min) attn_weights = attn_weights.view(bsz * self.num_heads, tgt_len, src_len) attn_weights = nn.functional.softmax(attn_weights, dim=-1) if layer_head_mask is not None: assert layer_head_mask.size() == ( self.num_heads, ), f"Head mask for a single layer should be of size {(self.num_heads,)}, but is {layer_head_mask.size()}" attn_weights = layer_head_mask.view(1, -1, 1, 1) * attn_weights.view(bsz, self.num_heads, tgt_len, src_len) attn_weights = attn_weights.view(bsz * self.num_heads, tgt_len, src_len) if output_attentions: # make sure that attn_weights are included in graph attn_weights_reshaped = attn_weights.view(bsz, self.num_heads, tgt_len, src_len) attn_weights = attn_weights_reshaped.view(bsz * self.num_heads, tgt_len, src_len) else: attn_weights_reshaped = None attn_probs = nn.functional.dropout( attn_weights, p=self.dropout, training=self.training, ) assert v is not None attn_output = torch.bmm(attn_probs, v) assert attn_output.size() == (bsz * self.num_heads, tgt_len, self.head_dim) attn_output = attn_output.transpose(0, 1).contiguous().view(tgt_len, bsz, embed_dim) attn_output = self.out_proj(attn_output) return attn_output, attn_weights_reshaped def _use_saved_state(self, k, v, saved_state, key_padding_mask, static_kv, bsz): # saved states are stored with shape (bsz, num_heads, seq_len, head_dim) if "prev_key" in saved_state: _prev_key = saved_state["prev_key"] assert _prev_key is not None prev_key = _prev_key.view(bsz * self.num_heads, -1, self.head_dim) if static_kv: k = prev_key else: assert k is not None k = torch.cat([prev_key, k], dim=1) if "prev_value" in saved_state: _prev_value = saved_state["prev_value"] assert _prev_value is not None prev_value = _prev_value.view(bsz * self.num_heads, -1, self.head_dim) if static_kv: v = prev_value else: assert v is not None v = torch.cat([prev_value, v], dim=1) assert k is not None and v is not None prev_key_padding_mask: Optional[Tensor] = saved_state.get("prev_key_padding_mask", None) if prev_key_padding_mask is not None: if static_kv: new_key_padding_mask = prev_key_padding_mask else: new_key_padding_mask = torch.cat([prev_key_padding_mask, key_padding_mask], dim=1) else: new_key_padding_mask = key_padding_mask return k, v, new_key_padding_mask def fill_with_neg_inf(t): """FP16-compatible function that fills a input_ids with -inf.""" return t.float().fill_(torch.finfo(t.dtype).min).type_as(t) # Public API def _get_shape(t): return getattr(t, "shape", None) @add_start_docstrings( "The bare FSMT Model outputting raw hidden-states without any specific head on top.", FSMT_START_DOCSTRING, ) class FSMTModel(PretrainedFSMTModel): _tied_weights_keys = ["decoder.embed_tokens.weight", "decoder.output_projection.weight"] def __init__(self, config: FSMTConfig): super().__init__(config) padding_idx = config.pad_token_id encoder_embed_tokens = nn.Embedding(config.src_vocab_size, config.d_model, padding_idx) decoder_embed_tokens = nn.Embedding(config.tgt_vocab_size, config.d_model, padding_idx) self.encoder = FSMTEncoder(config, encoder_embed_tokens) self.decoder = FSMTDecoder(config, decoder_embed_tokens) # Initialize weights and apply final processing self.post_init() def get_encoder(self): return self.encoder def get_decoder(self): return self.decoder def _tie_weights(self): if self.config.tie_word_embeddings: self._tie_or_clone_weights(self.decoder.embed_tokens, self.get_input_embeddings()) self._tie_or_clone_weights(self.decoder.output_projection, self.get_input_embeddings()) @add_start_docstrings_to_model_forward(FSMT_INPUTS_DOCSTRING) @add_code_sample_docstrings( checkpoint=_CHECKPOINT_FOR_DOC, output_type=Seq2SeqModelOutput, config_class=_CONFIG_FOR_DOC, ) def forward( self, input_ids: torch.LongTensor, attention_mask: Optional[torch.Tensor] = None, decoder_input_ids: Optional[torch.LongTensor] = None, decoder_attention_mask: Optional[torch.BoolTensor] = None, head_mask: Optional[torch.Tensor] = None, decoder_head_mask: Optional[torch.Tensor] = None, cross_attn_head_mask: Optional[torch.Tensor] = None, encoder_outputs: Optional[Tuple[torch.FloatTensor]] = None, past_key_values: Optional[Tuple[torch.FloatTensor]] = None, use_cache: Optional[bool] = None, output_attentions: Optional[bool] = None, output_hidden_states: Optional[bool] = None, inputs_embeds: Optional[torch.FloatTensor] = None, decoder_inputs_embeds: Optional[torch.FloatTensor] = None, return_dict: Optional[bool] = None, ) -> Union[Tuple[torch.Tensor], Seq2SeqModelOutput]: if decoder_input_ids is None: use_cache = False output_attentions = output_attentions if output_attentions is not None else self.config.output_attentions output_hidden_states = ( output_hidden_states if output_hidden_states is not None else self.config.output_hidden_states ) use_cache = use_cache if use_cache is not None else self.config.use_cache return_dict = return_dict if return_dict is not None else self.config.use_return_dict # make masks if user doesn't supply if not use_cache and input_ids is not None: decoder_input_ids, decoder_padding_mask, causal_mask = _prepare_fsmt_decoder_inputs( self.config, input_ids, decoder_input_ids=decoder_input_ids, decoder_padding_mask=decoder_attention_mask, causal_mask_dtype=self.decoder.embed_tokens.weight.dtype, ) else: decoder_padding_mask, causal_mask = None, None if decoder_input_ids is None and decoder_inputs_embeds is None: raise ValueError("Make sure that `decoder_input_ids` or `decoder_inputs_embeds` are passed.") if encoder_outputs is None: encoder_outputs = self.encoder( input_ids=input_ids, attention_mask=attention_mask, inputs_embeds=inputs_embeds, head_mask=head_mask, output_attentions=output_attentions, output_hidden_states=output_hidden_states, return_dict=return_dict, ) # If the user passed a tuple for encoder_outputs, we wrap it in a BaseModelOutput when return_dict=False elif return_dict and not isinstance(encoder_outputs, BaseModelOutput): encoder_outputs = BaseModelOutput( last_hidden_state=encoder_outputs[0], hidden_states=encoder_outputs[1] if len(encoder_outputs) > 1 else None, attentions=encoder_outputs[2] if len(encoder_outputs) > 2 else None, ) # decoder outputs consists of (dec_features, layer_state, dec_hidden, dec_attn) decoder_outputs = self.decoder( decoder_input_ids, encoder_outputs[0], attention_mask, decoder_padding_mask, decoder_causal_mask=causal_mask, inputs_embeds=decoder_inputs_embeds, head_mask=decoder_head_mask, cross_attn_head_mask=cross_attn_head_mask, past_key_values=past_key_values, use_cache=use_cache, output_attentions=output_attentions, output_hidden_states=output_hidden_states, return_dict=return_dict, ) if not return_dict: return decoder_outputs + encoder_outputs return Seq2SeqModelOutput( last_hidden_state=decoder_outputs.last_hidden_state, past_key_values=decoder_outputs.past_key_values, decoder_hidden_states=decoder_outputs.hidden_states, decoder_attentions=decoder_outputs.attentions, cross_attentions=decoder_outputs.cross_attentions, encoder_last_hidden_state=encoder_outputs.last_hidden_state, encoder_hidden_states=encoder_outputs.hidden_states, encoder_attentions=encoder_outputs.attentions, ) def get_input_embeddings(self): return self.encoder.embed_tokens def set_input_embeddings(self, value): self.encoder.embed_tokens = value def get_output_embeddings(self): return self.decoder.embed_tokens def set_output_embeddings(self, value): self.decoder.embed_tokens = value @add_start_docstrings( "The FSMT Model with a language modeling head. Can be used for summarization.", FSMT_START_DOCSTRING ) class FSMTForConditionalGeneration(PretrainedFSMTModel): base_model_prefix = "model" _tied_weights_keys = ["decoder.embed_tokens.weight", "decoder.output_projection.weight"] def __init__(self, config: FSMTConfig): super().__init__(config) base_model = FSMTModel(config) self.model = base_model # Initialize weights and apply final processing self.post_init() @add_start_docstrings_to_model_forward(FSMT_INPUTS_DOCSTRING) @replace_return_docstrings(output_type=Seq2SeqLMOutput, config_class=_CONFIG_FOR_DOC) @add_end_docstrings(FSMT_GENERATION_EXAMPLE) def forward( self, input_ids: torch.LongTensor, attention_mask: Optional[torch.Tensor] = None, decoder_input_ids: Optional[torch.LongTensor] = None, decoder_attention_mask: Optional[torch.BoolTensor] = None, head_mask: Optional[torch.Tensor] = None, decoder_head_mask: Optional[torch.Tensor] = None, cross_attn_head_mask: Optional[torch.Tensor] = None, encoder_outputs: Optional[Tuple[torch.FloatTensor]] = None, past_key_values: Optional[Tuple[torch.FloatTensor]] = None, inputs_embeds: Optional[torch.Tensor] = None, decoder_inputs_embeds: Optional[torch.Tensor] = None, labels: Optional[torch.LongTensor] = None, use_cache: Optional[bool] = None, output_attentions: Optional[bool] = None, output_hidden_states: Optional[bool] = None, return_dict: Optional[bool] = None, ) -> Union[Tuple[torch.Tensor], Seq2SeqLMOutput]: r""" labels (`torch.LongTensor` of shape `(batch_size, sequence_length)`, *optional*): Labels for computing the masked language modeling loss. Indices should either be in `[0, ..., config.vocab_size]` or -100 (see `input_ids` docstring). Tokens with indices set to `-100` are ignored (masked), the loss is only computed for the tokens with labels in `[0, ..., config.vocab_size]`. Returns: """ return_dict = return_dict if return_dict is not None else self.config.use_return_dict if labels is not None: use_cache = False outputs = self.model( input_ids, inputs_embeds=inputs_embeds, attention_mask=attention_mask, decoder_input_ids=decoder_input_ids, decoder_inputs_embeds=decoder_inputs_embeds, encoder_outputs=encoder_outputs, decoder_attention_mask=decoder_attention_mask, head_mask=head_mask, decoder_head_mask=decoder_head_mask, cross_attn_head_mask=cross_attn_head_mask, past_key_values=past_key_values, use_cache=use_cache, output_attentions=output_attentions, output_hidden_states=output_hidden_states, return_dict=return_dict, ) lm_logits = outputs[0] masked_lm_loss = None if labels is not None: loss_fct = CrossEntropyLoss() # TODO(SS): do we need to ignore pad tokens in labels? masked_lm_loss = loss_fct(lm_logits.view(-1, self.config.tgt_vocab_size), labels.view(-1)) if not return_dict: output = (lm_logits,) + outputs[1:] return ((masked_lm_loss,) + output) if masked_lm_loss is not None else output return Seq2SeqLMOutput( loss=masked_lm_loss, logits=lm_logits, past_key_values=outputs.past_key_values, decoder_hidden_states=outputs.decoder_hidden_states, decoder_attentions=outputs.decoder_attentions, cross_attentions=outputs.cross_attentions, encoder_last_hidden_state=outputs.encoder_last_hidden_state, encoder_hidden_states=outputs.encoder_hidden_states, encoder_attentions=outputs.encoder_attentions, ) def prepare_inputs_for_generation( self, decoder_input_ids, past_key_values=None, attention_mask=None, head_mask=None, decoder_head_mask=None, cross_attn_head_mask=None, use_cache=None, encoder_outputs=None, **kwargs, ): return { "input_ids": None, # encoder_outputs is defined. input_ids not needed "encoder_outputs": encoder_outputs, "past_key_values": past_key_values, "decoder_input_ids": decoder_input_ids, "attention_mask": attention_mask, "head_mask": head_mask, "decoder_head_mask": decoder_head_mask, "cross_attn_head_mask": cross_attn_head_mask, "use_cache": use_cache, # change this to avoid caching (presumably for debugging) } def prepare_decoder_input_ids_from_labels(self, labels: torch.Tensor): return shift_tokens_right(labels, self.config.pad_token_id) @staticmethod def _reorder_cache(past_key_values, beam_idx): reordered_past = [] for layer_past in past_key_values: # get the correct batch idx from decoder layer's batch dim for cross and self-attn layer_past_new = { attn_key: _reorder_buffer(attn_cache, beam_idx) for attn_key, attn_cache in layer_past.items() } reordered_past.append(layer_past_new) return reordered_past def get_encoder(self): return self.model.encoder def get_decoder(self): return self.model.decoder def get_output_embeddings(self): return self.model.decoder.embed_tokens def set_output_embeddings(self, value): self.model.decoder.embed_tokens = value class SinusoidalPositionalEmbedding(nn.Embedding): """ This module produces sinusoidal positional embeddings of any length. We don't want to save the weight of this embedding since it's not trained (deterministic) and it can be huge. Padding symbols are ignored. These embeddings get automatically extended in forward if more positions is needed. """ def __init__(self, num_positions, embedding_dim, padding_idx): self.make_weight(num_positions, embedding_dim, padding_idx) def make_weight(self, num_positions, embedding_dim, padding_idx): weight = self.get_embedding(num_positions, embedding_dim, padding_idx) if not hasattr(self, "weight"): # in ___init__ super().__init__(num_positions, embedding_dim, padding_idx, _weight=weight) else: # in forward put the weights on the correct dtype and device of the param weight = weight.to(dtype=self.weight.dtype, device=self.weight.device) self.weight = nn.Parameter(weight) self.weight.detach_() self.weight.requires_grad = False @staticmethod def get_embedding(num_embeddings, embedding_dim, padding_idx): """ Build sinusoidal embeddings. This matches the implementation in tensor2tensor, but differs slightly from the description in Section 3.5 of "Attention Is All You Need". """ half_dim = embedding_dim // 2 emb = math.log(10000) / (half_dim - 1) emb = torch.exp(torch.arange(half_dim, dtype=torch.int64).float() * -emb) emb = torch.arange(num_embeddings, dtype=torch.int64).float().unsqueeze(1) * emb.unsqueeze(0) emb = torch.cat([torch.sin(emb), torch.cos(emb)], dim=1).view(num_embeddings, -1) if embedding_dim % 2 == 1: # zero pad emb = torch.cat([emb, torch.zeros(num_embeddings, 1)], dim=1) if padding_idx is not None: emb[padding_idx, :] = 0 return emb @staticmethod def make_positions(tensor, padding_idx: int): """ Replace non-padding symbols with their position numbers. Position numbers begin at padding_idx+1. Padding symbols are ignored. """ # The series of casts and type-conversions here are carefully # balanced to both work with ONNX export and XLA. In particular XLA # prefers ints, cumsum defaults to output longs, and ONNX doesn't know # how to handle the dtype kwarg in cumsum. mask = tensor.ne(padding_idx).int() return (torch.cumsum(mask, dim=1).type_as(mask) * mask).long() + padding_idx def forward( self, input, incremental_state: Optional[Any] = None, timestep: Optional[Tensor] = None, ): """Input is expected to be of size [bsz x seqlen].""" bsz, seq_len = input.shape[:2] max_pos = self.padding_idx + 1 + seq_len if max_pos > self.weight.size(0): # expand embeddings if needed self.make_weight(max_pos, self.embedding_dim, self.padding_idx) positions = self.make_positions(input, self.padding_idx) return super().forward(positions)

transformers/src/transformers/models/fsmt/modeling_fsmt.py/0

{ "file_path": "transformers/src/transformers/models/fsmt/modeling_fsmt.py", "repo_id": "transformers", "token_count": 25668 }

91

# coding=utf-8 # Copyright 2024 The HuggingFace Inc. team. All rights reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. """ Gemma model configuration""" from ...configuration_utils import PretrainedConfig from ...utils import logging logger = logging.get_logger(__name__) GEMMA_PRETRAINED_CONFIG_ARCHIVE_MAP = {} class GemmaConfig(PretrainedConfig): r""" This is the configuration class to store the configuration of a [`GemmaModel`]. It is used to instantiate an Gemma model according to the specified arguments, defining the model architecture. Instantiating a configuration with the defaults will yield a similar configuration to that of the Gemma-7B. e.g. [google/gemma-7b](https://huggingface.co/google/gemma-7b) Configuration objects inherit from [`PretrainedConfig`] and can be used to control the model outputs. Read the documentation from [`PretrainedConfig`] for more information. Args: vocab_size (`int`, *optional*, defaults to 256000): Vocabulary size of the Gemma model. Defines the number of different tokens that can be represented by the `inputs_ids` passed when calling [`GemmaModel`] hidden_size (`int`, *optional*, defaults to 3072): Dimension of the hidden representations. intermediate_size (`int`, *optional*, defaults to 24576): Dimension of the MLP representations. num_hidden_layers (`int`, *optional*, defaults to 28): Number of hidden layers in the Transformer decoder. num_attention_heads (`int`, *optional*, defaults to 16): Number of attention heads for each attention layer in the Transformer decoder. num_key_value_heads (`int`, *optional*, defaults to 16): This is the number of key_value heads that should be used to implement Grouped Query Attention. If `num_key_value_heads=num_attention_heads`, the model will use Multi Head Attention (MHA), if `num_key_value_heads=1 the model will use Multi Query Attention (MQA) otherwise GQA is used. When converting a multi-head checkpoint to a GQA checkpoint, each group key and value head should be constructed by meanpooling all the original heads within that group. For more details checkout [this paper](https://arxiv.org/pdf/2305.13245.pdf). If it is not specified, will default to `num_attention_heads`. head_dim (`int`, *optional*, defaults to 256): The attention head dimension. hidden_act (`str` or `function`, *optional*, defaults to `"gelu"`): The non-linear activation function (function or string) in the decoder. max_position_embeddings (`int`, *optional*, defaults to 8192): The maximum sequence length that this model might ever be used with. initializer_range (`float`, *optional*, defaults to 0.02): The standard deviation of the truncated_normal_initializer for initializing all weight matrices. rms_norm_eps (`float`, *optional*, defaults to 1e-06): The epsilon used by the rms normalization layers. use_cache (`bool`, *optional*, defaults to `True`): Whether or not the model should return the last key/values attentions (not used by all models). Only relevant if `config.is_decoder=True`. pad_token_id (`int`, *optional*, defaults to 0): Padding token id. eos_token_id (`int`, *optional*, defaults to 1): End of stream token id. bos_token_id (`int`, *optional*, defaults to 2): Beginning of stream token id. tie_word_embeddings (`bool`, *optional*, defaults to `True`): Whether to tie weight embeddings rope_theta (`float`, *optional*, defaults to 10000.0): The base period of the RoPE embeddings. attention_bias (`bool`, defaults to `False`, *optional*, defaults to `False`): Whether to use a bias in the query, key, value and output projection layers during self-attention. attention_dropout (`float`, *optional*, defaults to 0.0): The dropout ratio for the attention probabilities. ```python >>> from transformers import GemmaModel, GemmaConfig >>> # Initializing a Gemma gemma-7b style configuration >>> configuration = GemmaConfig() >>> # Initializing a model from the gemma-7b style configuration >>> model = GemmaModel(configuration) >>> # Accessing the model configuration >>> configuration = model.config ```""" model_type = "gemma" keys_to_ignore_at_inference = ["past_key_values"] def __init__( self, vocab_size=256000, hidden_size=3072, intermediate_size=24576, num_hidden_layers=28, num_attention_heads=16, num_key_value_heads=16, head_dim=256, hidden_act="gelu", max_position_embeddings=8192, initializer_range=0.02, rms_norm_eps=1e-6, use_cache=True, pad_token_id=0, eos_token_id=1, bos_token_id=2, tie_word_embeddings=True, rope_theta=10000.0, attention_bias=False, attention_dropout=0.0, **kwargs, ): self.vocab_size = vocab_size self.max_position_embeddings = max_position_embeddings self.hidden_size = hidden_size self.intermediate_size = intermediate_size self.num_hidden_layers = num_hidden_layers self.num_attention_heads = num_attention_heads self.head_dim = head_dim self.num_key_value_heads = num_key_value_heads self.hidden_act = hidden_act self.initializer_range = initializer_range self.rms_norm_eps = rms_norm_eps self.use_cache = use_cache self.rope_theta = rope_theta self.attention_bias = attention_bias self.attention_dropout = attention_dropout super().__init__( pad_token_id=pad_token_id, bos_token_id=bos_token_id, eos_token_id=eos_token_id, tie_word_embeddings=tie_word_embeddings, **kwargs, )

transformers/src/transformers/models/gemma/configuration_gemma.py/0

{ "file_path": "transformers/src/transformers/models/gemma/configuration_gemma.py", "repo_id": "transformers", "token_count": 2556 }

92

# coding=utf-8 # Copyright 2022 KAIST and The HuggingFace Inc. team. All rights reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. """ PyTorch GLPN model.""" import math from typing import List, Optional, Tuple, Union import torch import torch.utils.checkpoint from torch import nn from ...activations import ACT2FN from ...modeling_outputs import BaseModelOutput, DepthEstimatorOutput from ...modeling_utils import PreTrainedModel from ...pytorch_utils import find_pruneable_heads_and_indices, prune_linear_layer from ...utils import ( add_code_sample_docstrings, add_start_docstrings, add_start_docstrings_to_model_forward, logging, replace_return_docstrings, ) from .configuration_glpn import GLPNConfig logger = logging.get_logger(__name__) # General docstring _CONFIG_FOR_DOC = "GLPNConfig" # Base docstring _CHECKPOINT_FOR_DOC = "vinvino02/glpn-kitti" _EXPECTED_OUTPUT_SHAPE = [1, 512, 15, 20] GLPN_PRETRAINED_MODEL_ARCHIVE_LIST = [ "vinvino02/glpn-kitti", # See all GLPN models at https://huggingface.co/models?filter=glpn ] # Copied from transformers.models.beit.modeling_beit.drop_path def drop_path(input: torch.Tensor, drop_prob: float = 0.0, training: bool = False) -> torch.Tensor: """ Drop paths (Stochastic Depth) per sample (when applied in main path of residual blocks). Comment by Ross Wightman: This is the same as the DropConnect impl I created for EfficientNet, etc networks, however, the original name is misleading as 'Drop Connect' is a different form of dropout in a separate paper... See discussion: https://github.com/tensorflow/tpu/issues/494#issuecomment-532968956 ... I've opted for changing the layer and argument names to 'drop path' rather than mix DropConnect as a layer name and use 'survival rate' as the argument. """ if drop_prob == 0.0 or not training: return input keep_prob = 1 - drop_prob shape = (input.shape[0],) + (1,) * (input.ndim - 1) # work with diff dim tensors, not just 2D ConvNets random_tensor = keep_prob + torch.rand(shape, dtype=input.dtype, device=input.device) random_tensor.floor_() # binarize output = input.div(keep_prob) * random_tensor return output # Copied from transformers.models.segformer.modeling_segformer.SegformerDropPath class GLPNDropPath(nn.Module): """Drop paths (Stochastic Depth) per sample (when applied in main path of residual blocks).""" def __init__(self, drop_prob: Optional[float] = None) -> None: super().__init__() self.drop_prob = drop_prob def forward(self, hidden_states: torch.Tensor) -> torch.Tensor: return drop_path(hidden_states, self.drop_prob, self.training) def extra_repr(self) -> str: return "p={}".format(self.drop_prob) # Copied from transformers.models.segformer.modeling_segformer.SegformerOverlapPatchEmbeddings class GLPNOverlapPatchEmbeddings(nn.Module): """Construct the overlapping patch embeddings.""" def __init__(self, patch_size, stride, num_channels, hidden_size): super().__init__() self.proj = nn.Conv2d( num_channels, hidden_size, kernel_size=patch_size, stride=stride, padding=patch_size // 2, ) self.layer_norm = nn.LayerNorm(hidden_size) def forward(self, pixel_values): embeddings = self.proj(pixel_values) _, _, height, width = embeddings.shape # (batch_size, num_channels, height, width) -> (batch_size, num_channels, height*width) -> (batch_size, height*width, num_channels) # this can be fed to a Transformer layer embeddings = embeddings.flatten(2).transpose(1, 2) embeddings = self.layer_norm(embeddings) return embeddings, height, width # Copied from transformers.models.segformer.modeling_segformer.SegformerEfficientSelfAttention class GLPNEfficientSelfAttention(nn.Module): """SegFormer's efficient self-attention mechanism. Employs the sequence reduction process introduced in the [PvT paper](https://arxiv.org/abs/2102.12122).""" def __init__(self, config, hidden_size, num_attention_heads, sequence_reduction_ratio): super().__init__() self.hidden_size = hidden_size self.num_attention_heads = num_attention_heads if self.hidden_size % self.num_attention_heads != 0: raise ValueError( f"The hidden size ({self.hidden_size}) is not a multiple of the number of attention " f"heads ({self.num_attention_heads})" ) self.attention_head_size = int(self.hidden_size / self.num_attention_heads) self.all_head_size = self.num_attention_heads * self.attention_head_size self.query = nn.Linear(self.hidden_size, self.all_head_size) self.key = nn.Linear(self.hidden_size, self.all_head_size) self.value = nn.Linear(self.hidden_size, self.all_head_size) self.dropout = nn.Dropout(config.attention_probs_dropout_prob) self.sr_ratio = sequence_reduction_ratio if sequence_reduction_ratio > 1: self.sr = nn.Conv2d( hidden_size, hidden_size, kernel_size=sequence_reduction_ratio, stride=sequence_reduction_ratio ) self.layer_norm = nn.LayerNorm(hidden_size) def transpose_for_scores(self, hidden_states): new_shape = hidden_states.size()[:-1] + (self.num_attention_heads, self.attention_head_size) hidden_states = hidden_states.view(new_shape) return hidden_states.permute(0, 2, 1, 3) def forward( self, hidden_states, height, width, output_attentions=False, ): query_layer = self.transpose_for_scores(self.query(hidden_states)) if self.sr_ratio > 1: batch_size, seq_len, num_channels = hidden_states.shape # Reshape to (batch_size, num_channels, height, width) hidden_states = hidden_states.permute(0, 2, 1).reshape(batch_size, num_channels, height, width) # Apply sequence reduction hidden_states = self.sr(hidden_states) # Reshape back to (batch_size, seq_len, num_channels) hidden_states = hidden_states.reshape(batch_size, num_channels, -1).permute(0, 2, 1) hidden_states = self.layer_norm(hidden_states) key_layer = self.transpose_for_scores(self.key(hidden_states)) value_layer = self.transpose_for_scores(self.value(hidden_states)) # Take the dot product between "query" and "key" to get the raw attention scores. attention_scores = torch.matmul(query_layer, key_layer.transpose(-1, -2)) attention_scores = attention_scores / math.sqrt(self.attention_head_size) # Normalize the attention scores to probabilities. attention_probs = nn.functional.softmax(attention_scores, dim=-1) # This is actually dropping out entire tokens to attend to, which might # seem a bit unusual, but is taken from the original Transformer paper. attention_probs = self.dropout(attention_probs) context_layer = torch.matmul(attention_probs, value_layer) context_layer = context_layer.permute(0, 2, 1, 3).contiguous() new_context_layer_shape = context_layer.size()[:-2] + (self.all_head_size,) context_layer = context_layer.view(new_context_layer_shape) outputs = (context_layer, attention_probs) if output_attentions else (context_layer,) return outputs # Copied from transformers.models.segformer.modeling_segformer.SegformerSelfOutput class GLPNSelfOutput(nn.Module): def __init__(self, config, hidden_size): super().__init__() self.dense = nn.Linear(hidden_size, hidden_size) self.dropout = nn.Dropout(config.hidden_dropout_prob) def forward(self, hidden_states, input_tensor): hidden_states = self.dense(hidden_states) hidden_states = self.dropout(hidden_states) return hidden_states # Copied from transformers.models.segformer.modeling_segformer.SegformerAttention with Segformer->GLPN class GLPNAttention(nn.Module): def __init__(self, config, hidden_size, num_attention_heads, sequence_reduction_ratio): super().__init__() self.self = GLPNEfficientSelfAttention( config=config, hidden_size=hidden_size, num_attention_heads=num_attention_heads, sequence_reduction_ratio=sequence_reduction_ratio, ) self.output = GLPNSelfOutput(config, hidden_size=hidden_size) self.pruned_heads = set() def prune_heads(self, heads): if len(heads) == 0: return heads, index = find_pruneable_heads_and_indices( heads, self.self.num_attention_heads, self.self.attention_head_size, self.pruned_heads ) # Prune linear layers self.self.query = prune_linear_layer(self.self.query, index) self.self.key = prune_linear_layer(self.self.key, index) self.self.value = prune_linear_layer(self.self.value, index) self.output.dense = prune_linear_layer(self.output.dense, index, dim=1) # Update hyper params and store pruned heads self.self.num_attention_heads = self.self.num_attention_heads - len(heads) self.self.all_head_size = self.self.attention_head_size * self.self.num_attention_heads self.pruned_heads = self.pruned_heads.union(heads) def forward(self, hidden_states, height, width, output_attentions=False): self_outputs = self.self(hidden_states, height, width, output_attentions) attention_output = self.output(self_outputs[0], hidden_states) outputs = (attention_output,) + self_outputs[1:] # add attentions if we output them return outputs # Copied from transformers.models.segformer.modeling_segformer.SegformerDWConv class GLPNDWConv(nn.Module): def __init__(self, dim=768): super().__init__() self.dwconv = nn.Conv2d(dim, dim, 3, 1, 1, bias=True, groups=dim) def forward(self, hidden_states, height, width): batch_size, seq_len, num_channels = hidden_states.shape hidden_states = hidden_states.transpose(1, 2).view(batch_size, num_channels, height, width) hidden_states = self.dwconv(hidden_states) hidden_states = hidden_states.flatten(2).transpose(1, 2) return hidden_states # Copied from transformers.models.segformer.modeling_segformer.SegformerMixFFN with Segformer->GLPN class GLPNMixFFN(nn.Module): def __init__(self, config, in_features, hidden_features=None, out_features=None): super().__init__() out_features = out_features or in_features self.dense1 = nn.Linear(in_features, hidden_features) self.dwconv = GLPNDWConv(hidden_features) if isinstance(config.hidden_act, str): self.intermediate_act_fn = ACT2FN[config.hidden_act] else: self.intermediate_act_fn = config.hidden_act self.dense2 = nn.Linear(hidden_features, out_features) self.dropout = nn.Dropout(config.hidden_dropout_prob) def forward(self, hidden_states, height, width): hidden_states = self.dense1(hidden_states) hidden_states = self.dwconv(hidden_states, height, width) hidden_states = self.intermediate_act_fn(hidden_states) hidden_states = self.dropout(hidden_states) hidden_states = self.dense2(hidden_states) hidden_states = self.dropout(hidden_states) return hidden_states # Copied from transformers.models.segformer.modeling_segformer.SegformerLayer with Segformer->GLPN class GLPNLayer(nn.Module): """This corresponds to the Block class in the original implementation.""" def __init__(self, config, hidden_size, num_attention_heads, drop_path, sequence_reduction_ratio, mlp_ratio): super().__init__() self.layer_norm_1 = nn.LayerNorm(hidden_size) self.attention = GLPNAttention( config, hidden_size=hidden_size, num_attention_heads=num_attention_heads, sequence_reduction_ratio=sequence_reduction_ratio, ) self.drop_path = GLPNDropPath(drop_path) if drop_path > 0.0 else nn.Identity() self.layer_norm_2 = nn.LayerNorm(hidden_size) mlp_hidden_size = int(hidden_size * mlp_ratio) self.mlp = GLPNMixFFN(config, in_features=hidden_size, hidden_features=mlp_hidden_size) def forward(self, hidden_states, height, width, output_attentions=False): self_attention_outputs = self.attention( self.layer_norm_1(hidden_states), # in GLPN, layernorm is applied before self-attention height, width, output_attentions=output_attentions, ) attention_output = self_attention_outputs[0] outputs = self_attention_outputs[1:] # add self attentions if we output attention weights # first residual connection (with stochastic depth) attention_output = self.drop_path(attention_output) hidden_states = attention_output + hidden_states mlp_output = self.mlp(self.layer_norm_2(hidden_states), height, width) # second residual connection (with stochastic depth) mlp_output = self.drop_path(mlp_output) layer_output = mlp_output + hidden_states outputs = (layer_output,) + outputs return outputs class GLPNEncoder(nn.Module): def __init__(self, config): super().__init__() self.config = config # stochastic depth decay rule dpr = [x.item() for x in torch.linspace(0, config.drop_path_rate, sum(config.depths))] # patch embeddings embeddings = [] for i in range(config.num_encoder_blocks): embeddings.append( GLPNOverlapPatchEmbeddings( patch_size=config.patch_sizes[i], stride=config.strides[i], num_channels=config.num_channels if i == 0 else config.hidden_sizes[i - 1], hidden_size=config.hidden_sizes[i], ) ) self.patch_embeddings = nn.ModuleList(embeddings) # Transformer blocks blocks = [] cur = 0 for i in range(config.num_encoder_blocks): # each block consists of layers layers = [] if i != 0: cur += config.depths[i - 1] for j in range(config.depths[i]): layers.append( GLPNLayer( config, hidden_size=config.hidden_sizes[i], num_attention_heads=config.num_attention_heads[i], drop_path=dpr[cur + j], sequence_reduction_ratio=config.sr_ratios[i], mlp_ratio=config.mlp_ratios[i], ) ) blocks.append(nn.ModuleList(layers)) self.block = nn.ModuleList(blocks) # Layer norms self.layer_norm = nn.ModuleList( [nn.LayerNorm(config.hidden_sizes[i]) for i in range(config.num_encoder_blocks)] ) def forward( self, pixel_values, output_attentions=False, output_hidden_states=False, return_dict=True, ): all_hidden_states = () if output_hidden_states else None all_self_attentions = () if output_attentions else None batch_size = pixel_values.shape[0] hidden_states = pixel_values for idx, x in enumerate(zip(self.patch_embeddings, self.block, self.layer_norm)): embedding_layer, block_layer, norm_layer = x # first, obtain patch embeddings hidden_states, height, width = embedding_layer(hidden_states) # second, send embeddings through blocks for i, blk in enumerate(block_layer): layer_outputs = blk(hidden_states, height, width, output_attentions) hidden_states = layer_outputs[0] if output_attentions: all_self_attentions = all_self_attentions + (layer_outputs[1],) # third, apply layer norm hidden_states = norm_layer(hidden_states) # fourth, optionally reshape back to (batch_size, num_channels, height, width) hidden_states = hidden_states.reshape(batch_size, height, width, -1).permute(0, 3, 1, 2).contiguous() if output_hidden_states: all_hidden_states = all_hidden_states + (hidden_states,) if not return_dict: return tuple(v for v in [hidden_states, all_hidden_states, all_self_attentions] if v is not None) return BaseModelOutput( last_hidden_state=hidden_states, hidden_states=all_hidden_states, attentions=all_self_attentions, ) class GLPNPreTrainedModel(PreTrainedModel): """ An abstract class to handle weights initialization and a simple interface for downloading and loading pretrained models. """ config_class = GLPNConfig base_model_prefix = "glpn" main_input_name = "pixel_values" # Copied from transformers.models.segformer.modeling_segformer.SegformerPreTrainedModel._init_weights def _init_weights(self, module): """Initialize the weights""" if isinstance(module, (nn.Linear, nn.Conv2d)): # Slightly different from the TF version which uses truncated_normal for initialization # cf https://github.com/pytorch/pytorch/pull/5617 module.weight.data.normal_(mean=0.0, std=self.config.initializer_range) if module.bias is not None: module.bias.data.zero_() elif isinstance(module, nn.Embedding): module.weight.data.normal_(mean=0.0, std=self.config.initializer_range) if module.padding_idx is not None: module.weight.data[module.padding_idx].zero_() elif isinstance(module, nn.LayerNorm): module.bias.data.zero_() module.weight.data.fill_(1.0) GLPN_START_DOCSTRING = r""" This model is a PyTorch [torch.nn.Module](https://pytorch.org/docs/stable/nn.html#torch.nn.Module) sub-class. Use it as a regular PyTorch Module and refer to the PyTorch documentation for all matter related to general usage and behavior. Parameters: config ([`GLPNConfig`]): Model configuration class with all the parameters of the model. Initializing with a config file does not load the weights associated with the model, only the configuration. Check out the [`~PreTrainedModel.from_pretrained`] method to load the model weights. """ GLPN_INPUTS_DOCSTRING = r""" Args: pixel_values (`torch.FloatTensor` of shape `(batch_size, num_channels, height, width)`): Pixel values. Padding will be ignored by default should you provide it. Pixel values can be obtained using [`AutoImageProcessor`]. See [`GLPNImageProcessor.__call__`] for details. output_attentions (`bool`, *optional*): Whether or not to return the attentions tensors of all attention layers. See `attentions` under returned tensors for more detail. output_hidden_states (`bool`, *optional*): Whether or not to return the hidden states of all layers. See `hidden_states` under returned tensors for more detail. return_dict (`bool`, *optional*): Whether or not to return a [`~utils.ModelOutput`] instead of a plain tuple. """ @add_start_docstrings( "The bare GLPN encoder (Mix-Transformer) outputting raw hidden-states without any specific head on top.", GLPN_START_DOCSTRING, ) class GLPNModel(GLPNPreTrainedModel): # Copied from transformers.models.segformer.modeling_segformer.SegformerModel.__init__ with Segformer->GLPN def __init__(self, config): super().__init__(config) self.config = config # hierarchical Transformer encoder self.encoder = GLPNEncoder(config) # Initialize weights and apply final processing self.post_init() def _prune_heads(self, heads_to_prune): """ Prunes heads of the model. heads_to_prune: dict of {layer_num: list of heads to prune in this layer} See base class PreTrainedModel """ for layer, heads in heads_to_prune.items(): self.encoder.layer[layer].attention.prune_heads(heads) @add_start_docstrings_to_model_forward(GLPN_INPUTS_DOCSTRING.format("(batch_size, sequence_length)")) @add_code_sample_docstrings( checkpoint=_CHECKPOINT_FOR_DOC, output_type=BaseModelOutput, config_class=_CONFIG_FOR_DOC, modality="vision", expected_output=_EXPECTED_OUTPUT_SHAPE, ) # Copied from transformers.models.segformer.modeling_segformer.SegformerModel.forward def forward( self, pixel_values: torch.FloatTensor, output_attentions: Optional[bool] = None, output_hidden_states: Optional[bool] = None, return_dict: Optional[bool] = None, ) -> Union[Tuple, BaseModelOutput]: output_attentions = output_attentions if output_attentions is not None else self.config.output_attentions output_hidden_states = ( output_hidden_states if output_hidden_states is not None else self.config.output_hidden_states ) return_dict = return_dict if return_dict is not None else self.config.use_return_dict encoder_outputs = self.encoder( pixel_values, output_attentions=output_attentions, output_hidden_states=output_hidden_states, return_dict=return_dict, ) sequence_output = encoder_outputs[0] if not return_dict: return (sequence_output,) + encoder_outputs[1:] return BaseModelOutput( last_hidden_state=sequence_output, hidden_states=encoder_outputs.hidden_states, attentions=encoder_outputs.attentions, ) class GLPNSelectiveFeatureFusion(nn.Module): """ Selective Feature Fusion module, as explained in the [paper](https://arxiv.org/abs/2201.07436) (section 3.4). This module adaptively selects and integrates local and global features by attaining an attention map for each feature. """ def __init__(self, in_channel=64): super().__init__() self.convolutional_layer1 = nn.Sequential( nn.Conv2d(in_channels=int(in_channel * 2), out_channels=in_channel, kernel_size=3, stride=1, padding=1), nn.BatchNorm2d(in_channel), nn.ReLU(), ) self.convolutional_layer2 = nn.Sequential( nn.Conv2d(in_channels=in_channel, out_channels=int(in_channel / 2), kernel_size=3, stride=1, padding=1), nn.BatchNorm2d(int(in_channel / 2)), nn.ReLU(), ) self.convolutional_layer3 = nn.Conv2d( in_channels=int(in_channel / 2), out_channels=2, kernel_size=3, stride=1, padding=1 ) self.sigmoid = nn.Sigmoid() def forward(self, local_features, global_features): # concatenate features along the channel dimension features = torch.cat((local_features, global_features), dim=1) # pass through convolutional layers features = self.convolutional_layer1(features) features = self.convolutional_layer2(features) features = self.convolutional_layer3(features) # apply sigmoid to get two-channel attention map attn = self.sigmoid(features) # construct hybrid features by adding element-wise hybrid_features = local_features * attn[:, 0, :, :].unsqueeze(1) + global_features * attn[ :, 1, :, : ].unsqueeze(1) return hybrid_features class GLPNDecoderStage(nn.Module): def __init__(self, in_channels, out_channels): super().__init__() should_skip = in_channels == out_channels self.convolution = nn.Conv2d(in_channels, out_channels, kernel_size=1) if not should_skip else nn.Identity() self.fusion = GLPNSelectiveFeatureFusion(out_channels) self.upsample = nn.Upsample(scale_factor=2, mode="bilinear", align_corners=False) def forward(self, hidden_state, residual=None): hidden_state = self.convolution(hidden_state) if residual is not None: hidden_state = self.fusion(hidden_state, residual) hidden_state = self.upsample(hidden_state) return hidden_state hidden_state = self.upsample(hidden_state) return hidden_state class GLPNDecoder(nn.Module): def __init__(self, config): super().__init__() # we use features from end -> start reserved_hidden_sizes = config.hidden_sizes[::-1] out_channels = config.decoder_hidden_size self.stages = nn.ModuleList( [GLPNDecoderStage(hidden_size, out_channels) for hidden_size in reserved_hidden_sizes] ) # don't fuse in first stage self.stages[0].fusion = None self.final_upsample = nn.Upsample(scale_factor=2, mode="bilinear", align_corners=False) def forward(self, hidden_states: List[torch.Tensor]) -> List[torch.Tensor]: stage_hidden_states = [] stage_hidden_state = None for hidden_state, stage in zip(hidden_states[::-1], self.stages): stage_hidden_state = stage(hidden_state, stage_hidden_state) stage_hidden_states.append(stage_hidden_state) stage_hidden_states[-1] = self.final_upsample(stage_hidden_state) return stage_hidden_states class SiLogLoss(nn.Module): r""" Implements the Scale-invariant log scale loss [Eigen et al., 2014](https://arxiv.org/abs/1406.2283). $$L=\frac{1}{n} \sum_{i} d_{i}^{2}-\frac{1}{2 n^{2}}\left(\sum_{i} d_{i}^{2}\right)$$ where $d_{i}=\log y_{i}-\log y_{i}^{*}$. """ def __init__(self, lambd=0.5): super().__init__() self.lambd = lambd def forward(self, pred, target): valid_mask = (target > 0).detach() diff_log = torch.log(target[valid_mask]) - torch.log(pred[valid_mask]) loss = torch.sqrt(torch.pow(diff_log, 2).mean() - self.lambd * torch.pow(diff_log.mean(), 2)) return loss class GLPNDepthEstimationHead(nn.Module): def __init__(self, config): super().__init__() self.config = config channels = config.decoder_hidden_size self.head = nn.Sequential( nn.Conv2d(channels, channels, kernel_size=3, stride=1, padding=1), nn.ReLU(inplace=False), nn.Conv2d(channels, 1, kernel_size=3, stride=1, padding=1), ) def forward(self, hidden_states: List[torch.Tensor]) -> torch.Tensor: # use last features of the decoder hidden_states = hidden_states[self.config.head_in_index] hidden_states = self.head(hidden_states) predicted_depth = torch.sigmoid(hidden_states) * self.config.max_depth predicted_depth = predicted_depth.squeeze(dim=1) return predicted_depth @add_start_docstrings( """GLPN Model transformer with a lightweight depth estimation head on top e.g. for KITTI, NYUv2.""", GLPN_START_DOCSTRING, ) class GLPNForDepthEstimation(GLPNPreTrainedModel): def __init__(self, config): super().__init__(config) self.glpn = GLPNModel(config) self.decoder = GLPNDecoder(config) self.head = GLPNDepthEstimationHead(config) # Initialize weights and apply final processing self.post_init() @add_start_docstrings_to_model_forward(GLPN_INPUTS_DOCSTRING.format("batch_size, sequence_length")) @replace_return_docstrings(output_type=DepthEstimatorOutput, config_class=_CONFIG_FOR_DOC) def forward( self, pixel_values: torch.FloatTensor, labels: Optional[torch.FloatTensor] = None, output_attentions: Optional[bool] = None, output_hidden_states: Optional[bool] = None, return_dict: Optional[bool] = None, ) -> Union[Tuple[torch.Tensor], DepthEstimatorOutput]: r""" labels (`torch.FloatTensor` of shape `(batch_size, height, width)`, *optional*): Ground truth depth estimation maps for computing the loss. Returns: Examples: ```python >>> from transformers import AutoImageProcessor, GLPNForDepthEstimation >>> import torch >>> import numpy as np >>> from PIL import Image >>> import requests >>> url = "http://images.cocodataset.org/val2017/000000039769.jpg" >>> image = Image.open(requests.get(url, stream=True).raw) >>> image_processor = AutoImageProcessor.from_pretrained("vinvino02/glpn-kitti") >>> model = GLPNForDepthEstimation.from_pretrained("vinvino02/glpn-kitti") >>> # prepare image for the model >>> inputs = image_processor(images=image, return_tensors="pt") >>> with torch.no_grad(): ... outputs = model(**inputs) ... predicted_depth = outputs.predicted_depth >>> # interpolate to original size >>> prediction = torch.nn.functional.interpolate( ... predicted_depth.unsqueeze(1), ... size=image.size[::-1], ... mode="bicubic", ... align_corners=False, ... ) >>> # visualize the prediction >>> output = prediction.squeeze().cpu().numpy() >>> formatted = (output * 255 / np.max(output)).astype("uint8") >>> depth = Image.fromarray(formatted) ```""" return_dict = return_dict if return_dict is not None else self.config.use_return_dict output_hidden_states = ( output_hidden_states if output_hidden_states is not None else self.config.output_hidden_states ) outputs = self.glpn( pixel_values, output_attentions=output_attentions, output_hidden_states=True, # we need the intermediate hidden states return_dict=return_dict, ) hidden_states = outputs.hidden_states if return_dict else outputs[1] out = self.decoder(hidden_states) predicted_depth = self.head(out) loss = None if labels is not None: loss_fct = SiLogLoss() loss = loss_fct(predicted_depth, labels) if not return_dict: if output_hidden_states: output = (predicted_depth,) + outputs[1:] else: output = (predicted_depth,) + outputs[2:] return ((loss,) + output) if loss is not None else output return DepthEstimatorOutput( loss=loss, predicted_depth=predicted_depth, hidden_states=outputs.hidden_states if output_hidden_states else None, attentions=outputs.attentions, )

transformers/src/transformers/models/glpn/modeling_glpn.py/0

{ "file_path": "transformers/src/transformers/models/glpn/modeling_glpn.py", "repo_id": "transformers", "token_count": 13224 }

93

# coding=utf-8 # Copyright 2021 The Eleuther AI and HuggingFace Inc. team. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. """Convert GPT Neo checkpoint.""" import argparse import json from transformers import GPTNeoConfig, GPTNeoForCausalLM, load_tf_weights_in_gpt_neo from transformers.utils import logging logging.set_verbosity_info() def convert_tf_checkpoint_to_pytorch(tf_checkpoint_path, config_file, pytorch_dump_path): # Initialise PyTorch model config_json = json.load(open(config_file, "r")) config = GPTNeoConfig( hidden_size=config_json["n_embd"], num_layers=config_json["n_layer"], num_heads=config_json["n_head"], attention_types=config_json["attention_types"], max_position_embeddings=config_json["n_positions"], resid_dropout=config_json["res_dropout"], embed_dropout=config_json["embed_dropout"], attention_dropout=config_json["attn_dropout"], ) print(f"Building PyTorch model from configuration: {config}") model = GPTNeoForCausalLM(config) # Load weights from tf checkpoint load_tf_weights_in_gpt_neo(model, config, tf_checkpoint_path) # Save pytorch-model print(f"Save PyTorch model to {pytorch_dump_path}") model.save_pretrained(pytorch_dump_path) if __name__ == "__main__": parser = argparse.ArgumentParser() # Required parameters parser.add_argument( "--tf_checkpoint_path", default=None, type=str, required=True, help="Path to the TensorFlow checkpoint path." ) parser.add_argument( "--config_file", default=None, type=str, required=True, help=( "The config json file corresponding to the pre-trained mesh-tf model. \n" "This specifies the model architecture." ), ) parser.add_argument( "--pytorch_dump_path", default=None, type=str, required=True, help="Path to the output PyTorch model." ) args = parser.parse_args() convert_tf_checkpoint_to_pytorch(args.tf_checkpoint_path, args.config_file, args.pytorch_dump_path)

transformers/src/transformers/models/gpt_neo/convert_gpt_neo_mesh_tf_to_pytorch.py/0

{ "file_path": "transformers/src/transformers/models/gpt_neo/convert_gpt_neo_mesh_tf_to_pytorch.py", "repo_id": "transformers", "token_count": 957 }

94

# coding=utf-8 # Copyright 2021 The EleutherAI and The HuggingFace Inc. team. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. from functools import partial from typing import Optional, Tuple import flax.linen as nn import jax import jax.numpy as jnp import numpy as np from flax.core.frozen_dict import FrozenDict, freeze, unfreeze from flax.linen import combine_masks, make_causal_mask from flax.linen.attention import dot_product_attention_weights from flax.traverse_util import flatten_dict, unflatten_dict from jax import lax from ...modeling_flax_outputs import FlaxBaseModelOutput, FlaxCausalLMOutput from ...modeling_flax_utils import ACT2FN, FlaxPreTrainedModel, append_call_sample_docstring from ...utils import add_start_docstrings, add_start_docstrings_to_model_forward, logging from .configuration_gptj import GPTJConfig logger = logging.get_logger(__name__) _CHECKPOINT_FOR_DOC = "gptj" _CONFIG_FOR_DOC = "GPTJConfig" GPTJ_START_DOCSTRING = r""" This model inherits from [`FlaxPreTrainedModel`]. Check the superclass documentation for the generic methods the library implements for all its model (such as downloading or saving, resizing the input embeddings, pruning heads etc.) This model is also a Flax Linen [flax.nn.Module](https://flax.readthedocs.io/en/latest/_autosummary/flax.nn.module.html) subclass. Use it as a regular Flax Module and refer to the Flax documentation for all matter related to general usage and behavior. Finally, this model supports inherent JAX features such as: - [Just-In-Time (JIT) compilation](https://jax.readthedocs.io/en/latest/jax.html#just-in-time-compilation-jit) - [Automatic Differentiation](https://jax.readthedocs.io/en/latest/jax.html#automatic-differentiation) - [Vectorization](https://jax.readthedocs.io/en/latest/jax.html#vectorization-vmap) - [Parallelization](https://jax.readthedocs.io/en/latest/jax.html#parallelization-pmap) Parameters: config ([`GPTJConfig`]): Model configuration class with all the parameters of the model. Initializing with a config file does not load the weights associated with the model, only the configuration. Check out the [`~FlaxPreTrainedModel.from_pretrained`] method to load the model weights. dtype (`jax.numpy.dtype`, *optional*, defaults to `jax.numpy.float32`): The data type of the computation. Can be one of `jax.numpy.float32`, `jax.numpy.float16` (on GPUs) and `jax.numpy.bfloat16` (on TPUs). This can be used to enable mixed-precision training or half-precision inference on GPUs or TPUs. If specified all the computation will be performed with the given `dtype`. **Note that this only specifies the dtype of the computation and does not influence the dtype of model parameters.** If you wish to change the dtype of the model parameters, see [`~FlaxPreTrainedModel.to_fp16`] and [`~FlaxPreTrainedModel.to_bf16`]. """ GPTJ_INPUTS_DOCSTRING = r""" Args: input_ids (`numpy.ndarray` of shape `(batch_size, input_ids_length)`): `input_ids_length` = `sequence_length`. Indices of input sequence tokens in the vocabulary. Indices can be obtained using [`AutoTokenizer`]. See [`PreTrainedTokenizer.encode`] and [`PreTrainedTokenizer.__call__`] for details. [What are input IDs?](../glossary#input-ids) attention_mask (`numpy.ndarray` of shape `(batch_size, sequence_length)`, *optional*): Mask to avoid performing attention on padding token indices. Mask values selected in `[0, 1]`: - 1 for tokens that are **not masked**, - 0 for tokens that are **masked**. [What are attention masks?](../glossary#attention-mask) position_ids (`numpy.ndarray` of shape `(batch_size, sequence_length)`, *optional*): Indices of positions of each input sequence tokens in the position embeddings. Selected in the range `[0, config.max_position_embeddings - 1]`. past_key_values (`Dict[str, np.ndarray]`, *optional*, returned by `init_cache` or when passing previous `past_key_values`): Dictionary of pre-computed hidden-states (key and values in the attention blocks) that can be used for fast auto-regressive decoding. Pre-computed key and value hidden-states are of shape *[batch_size, max_length]*. output_attentions (`bool`, *optional*): Whether or not to return the attentions tensors of all attention layers. See `attentions` under returned tensors for more detail. output_hidden_states (`bool`, *optional*): Whether or not to return the hidden states of all layers. See `hidden_states` under returned tensors for more detail. return_dict (`bool`, *optional*): Whether or not to return a [`~utils.ModelOutput`] instead of a plain tuple. """ def create_sinusoidal_positions(num_pos, dim): inv_freq = 1.0 / (10000 ** (np.arange(0, dim, 2) / dim)) sinusoid_inp = np.einsum("i , j -> i j", np.arange(num_pos), inv_freq).astype("float32") sin, cos = np.sin(sinusoid_inp), np.cos(sinusoid_inp) sentinel = dim // 2 + dim % 2 out = np.zeros((num_pos, dim)) out[:, 0:sentinel] = sin out[:, sentinel:] = cos return jnp.array(out) def rotate_every_two(tensor): rotate_half_tensor = jnp.stack((-tensor[:, :, :, 1::2], tensor[:, :, :, ::2]), axis=-1) rotate_half_tensor = rotate_half_tensor.reshape(rotate_half_tensor.shape[:-2] + (-1,)) return rotate_half_tensor def apply_rotary_pos_emb(tensor, sincos): sin_pos, cos_pos = sincos sin_pos = sin_pos[:, :, None, :].repeat(2, 3) cos_pos = cos_pos[:, :, None, :].repeat(2, 3) return (tensor * cos_pos) + (rotate_every_two(tensor) * sin_pos) class FlaxGPTJAttention(nn.Module): config: GPTJConfig dtype: jnp.dtype = jnp.float32 causal: bool = True is_cross_attention: bool = False def setup(self): config = self.config self.embed_dim = config.hidden_size self.num_heads = config.num_attention_heads self.head_dim = self.embed_dim // self.num_heads self.rotary_dim = config.rotary_dim dense = partial( nn.Dense, self.embed_dim, use_bias=False, dtype=self.dtype, kernel_init=jax.nn.initializers.normal(self.config.initializer_range), ) self.q_proj, self.k_proj, self.v_proj = dense(), dense(), dense() self.out_proj = dense() self.resid_dropout = nn.Dropout(rate=config.resid_pdrop) self.causal_mask = make_causal_mask(jnp.ones((1, config.max_position_embeddings), dtype="bool"), dtype="bool") pos_embd_dim = self.rotary_dim or self.embed_dim self.embed_positions = create_sinusoidal_positions(config.max_position_embeddings, pos_embd_dim) def _split_heads(self, hidden_states): return hidden_states.reshape(hidden_states.shape[:2] + (self.num_heads, self.head_dim)) def _merge_heads(self, hidden_states): return hidden_states.reshape(hidden_states.shape[:2] + (self.embed_dim,)) @nn.compact def _concatenate_to_cache(self, key, value, query, attention_mask): """ This function takes projected key, value states from a single input token and concatenates the states to cached states from previous steps. This function is slighly adapted from the official Flax repository: https://github.com/google/flax/blob/491ce18759622506588784b4fca0e4bf05f8c8cd/flax/linen/attention.py#L252 """ # detect if we're initializing by absence of existing cache data. is_initialized = self.has_variable("cache", "cached_key") cached_key = self.variable("cache", "cached_key", jnp.zeros, key.shape, key.dtype) cached_value = self.variable("cache", "cached_value", jnp.zeros, value.shape, value.dtype) cache_index = self.variable("cache", "cache_index", lambda: jnp.array(0, dtype=jnp.int32)) if is_initialized: *batch_dims, max_length, num_heads, depth_per_head = cached_key.value.shape # update key, value caches with our new 1d spatial slices cur_index = cache_index.value indices = (0,) * len(batch_dims) + (cur_index, 0, 0) key = lax.dynamic_update_slice(cached_key.value, key, indices) value = lax.dynamic_update_slice(cached_value.value, value, indices) cached_key.value = key cached_value.value = value num_updated_cache_vectors = query.shape[1] cache_index.value = cache_index.value + num_updated_cache_vectors # causal mask for cached decoder self-attention: our single query position should only attend to those key # positions that have already been generated and cached, not the remaining zero elements. pad_mask = jnp.broadcast_to( jnp.arange(max_length) < cur_index + num_updated_cache_vectors, tuple(batch_dims) + (1, num_updated_cache_vectors, max_length), ) attention_mask = combine_masks(pad_mask, attention_mask) return key, value, attention_mask def __call__( self, hidden_states, attention_mask, position_ids, deterministic: bool = True, init_cache: bool = False, output_attentions: bool = False, ): query = self.q_proj(hidden_states) key = self.k_proj(hidden_states) value = self.v_proj(hidden_states) query = self._split_heads(query) key = self._split_heads(key) value = self._split_heads(value) sincos = jnp.take(self.embed_positions, position_ids, axis=0) sincos = jnp.split(sincos, 2, axis=-1) if self.rotary_dim is not None: k_rot = key[:, :, :, : self.rotary_dim] k_pass = key[:, :, :, self.rotary_dim :] q_rot = query[:, :, :, : self.rotary_dim] q_pass = query[:, :, :, self.rotary_dim :] k_rot = apply_rotary_pos_emb(k_rot, sincos) q_rot = apply_rotary_pos_emb(q_rot, sincos) key = jnp.concatenate([k_rot, k_pass], axis=-1) query = jnp.concatenate([q_rot, q_pass], axis=-1) else: key = apply_rotary_pos_emb(key, sincos) query = apply_rotary_pos_emb(query, sincos) query_length, key_length = query.shape[1], key.shape[1] if self.has_variable("cache", "cached_key"): mask_shift = self.variables["cache"]["cache_index"] max_decoder_length = self.variables["cache"]["cached_key"].shape[1] causal_mask = lax.dynamic_slice( self.causal_mask, (0, 0, mask_shift, 0), (1, 1, query_length, max_decoder_length) ) else: causal_mask = self.causal_mask[:, :, :query_length, :key_length] batch_size = hidden_states.shape[0] causal_mask = jnp.broadcast_to(causal_mask, (batch_size,) + causal_mask.shape[1:]) attention_mask = jnp.broadcast_to(jnp.expand_dims(attention_mask, axis=(-3, -2)), causal_mask.shape) attention_mask = combine_masks(attention_mask, causal_mask) dropout_rng = None if not deterministic and self.config.attn_pdrop > 0.0: dropout_rng = self.make_rng("dropout") # During fast autoregressive decoding, we feed one position at a time, # and cache the keys and values step by step. if self.has_variable("cache", "cached_key") or init_cache: key, value, attention_mask = self._concatenate_to_cache(key, value, query, attention_mask) # transform boolean mask into float mask attention_bias = lax.select( attention_mask > 0, jnp.full(attention_mask.shape, 0.0).astype(self.dtype), jnp.full(attention_mask.shape, jnp.finfo(self.dtype).min).astype(self.dtype), ) # usual dot product attention attn_weights = dot_product_attention_weights( query, key, bias=attention_bias, dropout_rng=dropout_rng, dropout_rate=self.config.attn_pdrop, deterministic=deterministic, dtype=self.dtype, precision=None, ) attn_output = jnp.einsum("...hqk,...khd->...qhd", attn_weights, value) attn_output = self._merge_heads(attn_output) attn_output = self.out_proj(attn_output) attn_output = self.resid_dropout(attn_output, deterministic=deterministic) outputs = (attn_output, attn_weights) if output_attentions else (attn_output,) return outputs class FlaxGPTJMLP(nn.Module): config: GPTJConfig intermediate_size: int dtype: jnp.dtype = jnp.float32 def setup(self): embed_dim = self.config.hidden_size kernel_init = jax.nn.initializers.normal(self.config.initializer_range) self.fc_in = nn.Dense(self.intermediate_size, dtype=self.dtype, kernel_init=kernel_init) self.fc_out = nn.Dense(embed_dim, dtype=self.dtype, kernel_init=kernel_init) self.act = ACT2FN[self.config.activation_function] self.dropout = nn.Dropout(rate=self.config.resid_pdrop) def __call__(self, hidden_states, deterministic: bool = True): hidden_states = self.fc_in(hidden_states) hidden_states = self.act(hidden_states) hidden_states = self.fc_out(hidden_states) hidden_states = self.dropout(hidden_states, deterministic=deterministic) return hidden_states class FlaxGPTJBlock(nn.Module): config: GPTJConfig dtype: jnp.dtype = jnp.float32 def setup(self): hidden_size = self.config.hidden_size inner_dim = self.config.n_inner if self.config.n_inner is not None else 4 * hidden_size self.ln_1 = nn.LayerNorm(epsilon=self.config.layer_norm_epsilon, dtype=self.dtype) self.attn = FlaxGPTJAttention(self.config, dtype=self.dtype) self.mlp = FlaxGPTJMLP(self.config, inner_dim, dtype=self.dtype) def __call__( self, hidden_states, attention_mask=None, position_ids=None, deterministic: bool = True, init_cache: bool = False, output_attentions: bool = False, ): residual = hidden_states hidden_states = self.ln_1(hidden_states) attn_outputs = self.attn( hidden_states, attention_mask=attention_mask, position_ids=position_ids, deterministic=deterministic, init_cache=init_cache, output_attentions=output_attentions, ) attn_output = attn_outputs[0] feed_forward_hidden_states = self.mlp(hidden_states, deterministic=deterministic) # residual connection hidden_states = attn_output + feed_forward_hidden_states + residual return (hidden_states,) + attn_outputs[1:] class FlaxGPTJPreTrainedModel(FlaxPreTrainedModel): """ An abstract class to handle weights initialization and a simple interface for downloading and loading pretrained models. """ config_class = GPTJConfig base_model_prefix = "transformer" module_class: nn.Module = None def __init__( self, config: GPTJConfig, input_shape: Tuple = (1, 1), seed: int = 0, dtype: jnp.dtype = jnp.float32, _do_init: bool = True, **kwargs, ): module = self.module_class(config=config, dtype=dtype, **kwargs) super().__init__(config, module, input_shape=input_shape, seed=seed, dtype=dtype, _do_init=_do_init) def init_weights(self, rng: jax.random.PRNGKey, input_shape: Tuple, params: FrozenDict = None) -> FrozenDict: # init input tensors input_ids = jnp.zeros(input_shape, dtype="i4") attention_mask = jnp.ones_like(input_ids) position_ids = jnp.broadcast_to(jnp.arange(jnp.atleast_2d(input_ids).shape[-1]), input_shape) params_rng, dropout_rng = jax.random.split(rng) rngs = {"params": params_rng, "dropout": dropout_rng} if self.config.add_cross_attention: encoder_hidden_states = jnp.zeros(input_shape + (self.config.n_embd,)) encoder_attention_mask = attention_mask module_init_outputs = self.module.init( rngs, input_ids, attention_mask, position_ids, encoder_hidden_states, encoder_attention_mask, return_dict=False, ) else: module_init_outputs = self.module.init(rngs, input_ids, attention_mask, position_ids, return_dict=False) random_params = module_init_outputs["params"] if params is not None: random_params = flatten_dict(unfreeze(random_params)) params = flatten_dict(unfreeze(params)) for missing_key in self._missing_keys: params[missing_key] = random_params[missing_key] self._missing_keys = set() return freeze(unflatten_dict(params)) else: return random_params def init_cache(self, batch_size, max_length): r""" Args: batch_size (`int`): batch_size used for fast auto-regressive decoding. Defines the batch size of the initialized cache. max_length (`int`): maximum possible length for auto-regressive decoding. Defines the sequence length of the initialized cache. """ # init input variables to retrieve cache input_ids = jnp.ones((batch_size, max_length)) attention_mask = jnp.ones_like(input_ids) position_ids = jnp.broadcast_to(jnp.arange(jnp.atleast_2d(input_ids).shape[-1]), input_ids.shape) init_variables = self.module.init( jax.random.PRNGKey(0), input_ids, attention_mask, position_ids, return_dict=False, init_cache=True ) return init_variables["cache"] @add_start_docstrings_to_model_forward(GPTJ_INPUTS_DOCSTRING) def __call__( self, input_ids, attention_mask=None, position_ids=None, params: dict = None, past_key_values: dict = None, dropout_rng: jax.random.PRNGKey = None, train: bool = False, output_attentions: Optional[bool] = None, output_hidden_states: Optional[bool] = None, return_dict: Optional[bool] = None, ): output_attentions = output_attentions if output_attentions is not None else self.config.output_attentions output_hidden_states = ( output_hidden_states if output_hidden_states is not None else self.config.output_hidden_states ) return_dict = return_dict if return_dict is not None else self.config.return_dict batch_size, sequence_length = input_ids.shape if position_ids is None: if past_key_values is not None: raise ValueError("Make sure to provide `position_ids` when passing `past_key_values`.") position_ids = jnp.broadcast_to(jnp.arange(sequence_length)[None, :], (batch_size, sequence_length)) if attention_mask is None: attention_mask = jnp.ones((batch_size, sequence_length)) # Handle any PRNG if needed rngs = {} if dropout_rng is not None: rngs["dropout"] = dropout_rng inputs = {"params": params or self.params} # if past_key_values are passed then cache is already initialized a private flag init_cache has to be passed down to ensure cache is used. It has to be made sure that cache is marked as mutable so that it can be changed by FlaxGPTJAttention module if past_key_values: inputs["cache"] = past_key_values mutable = ["cache"] else: mutable = False outputs = self.module.apply( inputs, jnp.array(input_ids, dtype="i4"), jnp.array(attention_mask, dtype="i4"), jnp.array(position_ids, dtype="i4"), not train, False, output_attentions, output_hidden_states, return_dict, rngs=rngs, mutable=mutable, ) # add updated cache to model output if past_key_values is not None and return_dict: outputs, past_key_values = outputs outputs["past_key_values"] = unfreeze(past_key_values["cache"]) return outputs elif past_key_values is not None and not return_dict: outputs, past_key_values = outputs outputs = outputs[:1] + (unfreeze(past_key_values["cache"]),) + outputs[1:] return outputs class FlaxGPTJBlockCollection(nn.Module): config: GPTJConfig dtype: jnp.dtype = jnp.float32 def setup(self): self.blocks = [ FlaxGPTJBlock(self.config, name=str(i), dtype=self.dtype) for i in range(self.config.num_hidden_layers) ] def __call__( self, hidden_states, attention_mask=None, position_ids=None, deterministic: bool = True, init_cache: bool = False, output_attentions: bool = False, output_hidden_states: bool = False, return_dict: bool = True, ): all_attentions = () if output_attentions else None all_hidden_states = () if output_hidden_states else None for block in self.blocks: if output_hidden_states: all_hidden_states += (hidden_states,) layer_outputs = block( hidden_states, attention_mask, position_ids=position_ids, deterministic=deterministic, init_cache=init_cache, output_attentions=output_attentions, ) hidden_states = layer_outputs[0] if output_attentions: all_attentions += (layer_outputs[1],) # this contains possible `None` values - `FlaxGPTJModule` will filter them out outputs = (hidden_states, all_hidden_states, all_attentions) return outputs class FlaxGPTJModule(nn.Module): config: GPTJConfig dtype: jnp.dtype = jnp.float32 def setup(self): self.embed_dim = self.config.hidden_size self.wte = nn.Embed( self.config.vocab_size, self.config.hidden_size, embedding_init=jax.nn.initializers.normal(stddev=self.config.initializer_range), ) self.dropout = nn.Dropout(rate=self.config.embd_pdrop) self.h = FlaxGPTJBlockCollection(self.config, dtype=self.dtype) self.ln_f = nn.LayerNorm(epsilon=self.config.layer_norm_epsilon, dtype=self.dtype) def __call__( self, input_ids, attention_mask, position_ids, deterministic=True, init_cache: bool = False, output_attentions: bool = False, output_hidden_states: bool = False, return_dict: bool = True, ): input_embeds = self.wte(input_ids.astype("i4")) hidden_states = self.dropout(input_embeds, deterministic=deterministic) outputs = self.h( hidden_states, attention_mask, position_ids=position_ids, deterministic=deterministic, init_cache=init_cache, output_attentions=output_attentions, output_hidden_states=output_hidden_states, return_dict=return_dict, ) hidden_states = outputs[0] hidden_states = self.ln_f(hidden_states) if output_hidden_states: all_hidden_states = outputs[1] + (hidden_states,) outputs = (hidden_states, all_hidden_states) + outputs[2:] else: outputs = (hidden_states,) + outputs[1:] if not return_dict: return tuple(v for v in outputs if v is not None) return FlaxBaseModelOutput( last_hidden_state=hidden_states, hidden_states=outputs[1], attentions=outputs[-1], ) @add_start_docstrings( "The bare GPTJ Model transformer outputting raw hidden-states without any specific head on top.", GPTJ_START_DOCSTRING, ) class FlaxGPTJModel(FlaxGPTJPreTrainedModel): module_class = FlaxGPTJModule append_call_sample_docstring( FlaxGPTJModel, _CHECKPOINT_FOR_DOC, FlaxCausalLMOutput, _CONFIG_FOR_DOC, ) class FlaxGPTJForCausalLMModule(nn.Module): config: GPTJConfig dtype: jnp.dtype = jnp.float32 def setup(self): self.transformer = FlaxGPTJModule(self.config, dtype=self.dtype) self.lm_head = nn.Dense( self.config.vocab_size, dtype=self.dtype, kernel_init=jax.nn.initializers.normal(stddev=self.config.initializer_range), ) def __call__( self, input_ids, attention_mask, position_ids, deterministic: bool = True, init_cache: bool = False, output_attentions: bool = False, output_hidden_states: bool = False, return_dict: bool = True, ): outputs = self.transformer( input_ids, attention_mask, position_ids, deterministic=deterministic, init_cache=init_cache, output_attentions=output_attentions, output_hidden_states=output_hidden_states, return_dict=return_dict, ) hidden_states = outputs[0] if self.config.tie_word_embeddings: shared_kernel = self.transformer.variables["params"]["wte"]["embedding"].T lm_logits = self.lm_head.apply({"params": {"kernel": shared_kernel}}, hidden_states) else: lm_logits = self.lm_head(hidden_states) if not return_dict: return (lm_logits,) + outputs[1:] return FlaxCausalLMOutput(logits=lm_logits, hidden_states=outputs.hidden_states, attentions=outputs.attentions) @add_start_docstrings( """ The GPTJ Model transformer with a language modeling head on top. """, GPTJ_START_DOCSTRING, ) class FlaxGPTJForCausalLM(FlaxGPTJPreTrainedModel): module_class = FlaxGPTJForCausalLMModule def prepare_inputs_for_generation(self, input_ids, max_length, attention_mask: Optional[jax.Array] = None): # initializing the cache batch_size, seq_length = input_ids.shape past_key_values = self.init_cache(batch_size, max_length) # Note that usually one would have to put 0's in the attention_mask for x > input_ids.shape[-1] and x < cache_length. # But since GPTJ uses a causal mask, those positions are masked anyways. # Thus we can create a single static attention_mask here, which is more efficient for compilation extended_attention_mask = jnp.ones((batch_size, max_length), dtype="i4") if attention_mask is not None: position_ids = attention_mask.cumsum(axis=-1) - 1 extended_attention_mask = lax.dynamic_update_slice(extended_attention_mask, attention_mask, (0, 0)) else: position_ids = jnp.broadcast_to(jnp.arange(seq_length, dtype="i4")[None, :], (batch_size, seq_length)) return { "past_key_values": past_key_values, "attention_mask": extended_attention_mask, "position_ids": position_ids, } def update_inputs_for_generation(self, model_outputs, model_kwargs): model_kwargs["past_key_values"] = model_outputs.past_key_values model_kwargs["position_ids"] = model_kwargs["position_ids"][:, -1:] + 1 return model_kwargs append_call_sample_docstring( FlaxGPTJForCausalLM, _CHECKPOINT_FOR_DOC, FlaxCausalLMOutput, _CONFIG_FOR_DOC, )

transformers/src/transformers/models/gptj/modeling_flax_gptj.py/0

{ "file_path": "transformers/src/transformers/models/gptj/modeling_flax_gptj.py", "repo_id": "transformers", "token_count": 12460 }

95

# coding=utf-8 # Copyright 2022 NVIDIA and The HuggingFace Team. All rights reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. """ PyTorch GroupViT model.""" import collections.abc import math from dataclasses import dataclass from typing import Any, Optional, Tuple, Union import numpy as np import torch import torch.utils.checkpoint from torch import nn from ...activations import ACT2FN from ...modeling_attn_mask_utils import _create_4d_causal_attention_mask, _prepare_4d_attention_mask from ...modeling_outputs import BaseModelOutput, BaseModelOutputWithPooling from ...modeling_utils import PreTrainedModel from ...utils import ( ModelOutput, add_start_docstrings, add_start_docstrings_to_model_forward, logging, replace_return_docstrings, ) from .configuration_groupvit import GroupViTConfig, GroupViTTextConfig, GroupViTVisionConfig logger = logging.get_logger(__name__) _CHECKPOINT_FOR_DOC = "nvidia/groupvit-gcc-yfcc" GROUPVIT_PRETRAINED_MODEL_ARCHIVE_LIST = [ "nvidia/groupvit-gcc-yfcc", # See all GroupViT models at https://huggingface.co/models?filter=groupvit ] # contrastive loss function, adapted from # https://sachinruk.github.io/blog/pytorch/pytorch%20lightning/loss%20function/gpu/2021/03/07/CLIP.html def contrastive_loss(logits: torch.Tensor) -> torch.Tensor: return nn.functional.cross_entropy(logits, torch.arange(len(logits), device=logits.device)) # Copied from transformers.models.clip.modeling_clip.clip_loss with clip->groupvit def groupvit_loss(similarity: torch.Tensor) -> torch.Tensor: caption_loss = contrastive_loss(similarity) image_loss = contrastive_loss(similarity.t()) return (caption_loss + image_loss) / 2.0 def hard_softmax(logits: torch.Tensor, dim: int): y_soft = logits.softmax(dim) # Straight through. index = y_soft.max(dim, keepdim=True)[1] y_hard = torch.zeros_like(logits, memory_format=torch.legacy_contiguous_format).scatter_(dim, index, 1.0) ret = y_hard - y_soft.detach() + y_soft return ret def gumbel_softmax(logits: torch.Tensor, tau: float = 1, hard: bool = False, dim: int = -1) -> torch.Tensor: # more stable https://github.com/pytorch/pytorch/issues/41663 gumbel_dist = torch.distributions.gumbel.Gumbel( torch.tensor(0.0, device=logits.device, dtype=logits.dtype), torch.tensor(1.0, device=logits.device, dtype=logits.dtype), ) gumbels = gumbel_dist.sample(logits.shape) gumbels = (logits + gumbels) / tau # ~Gumbel(logits,tau) y_soft = gumbels.softmax(dim) if hard: # Straight through. index = y_soft.max(dim, keepdim=True)[1] y_hard = torch.zeros_like(logits, memory_format=torch.legacy_contiguous_format).scatter_(dim, index, 1.0) ret = y_hard - y_soft.detach() + y_soft else: # Reparametrization trick. ret = y_soft return ret def resize_attention_map(attentions, height, width, align_corners=False): """ Args: attentions (`torch.Tensor`): attention map of shape [batch_size, groups, feat_height*feat_width] height (`int`): height of the output attention map width (`int`): width of the output attention map align_corners (`bool`, *optional*): the `align_corner` argument for `nn.functional.interpolate`. Returns: `torch.Tensor`: resized attention map of shape [batch_size, groups, height, width] """ scale = (height * width // attentions.shape[2]) ** 0.5 if height > width: feat_width = int(np.round(width / scale)) feat_height = attentions.shape[2] // feat_width else: feat_height = int(np.round(height / scale)) feat_width = attentions.shape[2] // feat_height batch_size = attentions.shape[0] groups = attentions.shape[1] # number of group token # [batch_size, groups, height*width, groups] -> [batch_size, groups, height, width] attentions = attentions.reshape(batch_size, groups, feat_height, feat_width) attentions = nn.functional.interpolate( attentions, size=(height, width), mode="bilinear", align_corners=align_corners ) return attentions def get_grouping_from_attentions(attentions, hw_shape): """ Args: attentions (`tuple(torch.FloatTensor)`: tuple of attention maps returned by `GroupViTVisionTransformer` hw_shape (`tuple(int)`): height and width of the output attention map Returns: `torch.Tensor`: the attention map of shape [batch_size, groups, height, width] """ attn_maps = [] with torch.no_grad(): prev_attn_masks = None for attn_masks in attentions: # [batch_size, num_groups, height x width] -> [batch_size, height x width, num_groups] attn_masks = attn_masks.permute(0, 2, 1).contiguous() if prev_attn_masks is None: prev_attn_masks = attn_masks else: prev_attn_masks = prev_attn_masks @ attn_masks # [batch_size, heightxwidth, num_groups] -> [batch_size, num_groups, heightxwidth] -> [batch_size, num_groups, height, width] cur_attn_map = resize_attention_map(prev_attn_masks.permute(0, 2, 1).contiguous(), *hw_shape) attn_maps.append(cur_attn_map) # [batch_size, num_groups, height, width] final_grouping = attn_maps[-1] return final_grouping class GroupViTCrossAttentionLayer(nn.Module): def __init__(self, config: GroupViTVisionConfig): super().__init__() self.attn = GroupViTAttention(config) self.norm2 = nn.LayerNorm(config.hidden_size, eps=config.layer_norm_eps) self.mlp = GroupViTMLP(config) self.norm_post = nn.LayerNorm(config.hidden_size, eps=config.layer_norm_eps) def forward(self, query, key): x = query x = x + self.attn(query, encoder_hidden_states=key)[0] x = x + self.mlp(self.norm2(x)) x = self.norm_post(x) return x class GroupViTAssignAttention(nn.Module): def __init__(self, config: GroupViTVisionConfig): super().__init__() self.scale = config.hidden_size**-0.5 self.q_proj = nn.Linear(config.hidden_size, config.hidden_size) self.k_proj = nn.Linear(config.hidden_size, config.hidden_size) self.v_proj = nn.Linear(config.hidden_size, config.hidden_size) self.proj = nn.Linear(config.hidden_size, config.hidden_size) self.assign_eps = config.assign_eps def get_attn(self, attn, gumbel=True, hard=True): if gumbel and self.training: attn = gumbel_softmax(attn, dim=-2, hard=hard) else: if hard: attn = hard_softmax(attn, dim=-2) else: attn = nn.functional.softmax(attn, dim=-2) return attn def forward(self, query, key): value = key # [batch_size, query_length, channels] query = self.q_proj(query) # [batch_size, key_length, channels] key = self.k_proj(key) # [batch_size, key_length, channels] value = self.v_proj(value) # [batch_size, query_length, key_length] raw_attn = (query @ key.transpose(-2, -1)) * self.scale attn = self.get_attn(raw_attn) soft_attn = self.get_attn(raw_attn, gumbel=False, hard=False) attn = attn / (attn.sum(dim=-1, keepdim=True) + self.assign_eps) out = attn @ value out = self.proj(out) return out, soft_attn class GroupViTTokenAssign(nn.Module): def __init__(self, config: GroupViTVisionConfig, num_group_token, num_output_group): super().__init__() self.num_output_group = num_output_group # norm on group_tokens self.norm_tokens = nn.LayerNorm(config.hidden_size, eps=config.layer_norm_eps) assign_mlp_ratio = ( config.assign_mlp_ratio if isinstance(config.assign_mlp_ratio, collections.abc.Iterable) else (config.assign_mlp_ratio, config.assign_mlp_ratio) ) tokens_dim, channels_dim = [int(x * config.hidden_size) for x in assign_mlp_ratio] self.mlp_inter = GroupViTMixerMLP(config, num_group_token, tokens_dim, num_output_group) self.norm_post_tokens = nn.LayerNorm(config.hidden_size, eps=config.layer_norm_eps) # norm on x self.norm_x = nn.LayerNorm(config.hidden_size, eps=config.layer_norm_eps) self.pre_assign_attn = GroupViTCrossAttentionLayer(config) self.assign = GroupViTAssignAttention(config) self.norm_new_x = nn.LayerNorm(config.hidden_size, eps=config.layer_norm_eps) self.mlp_channels = GroupViTMLP(config, config.hidden_size, channels_dim, config.hidden_size) def project_group_token(self, group_tokens): """ Args: group_tokens (torch.Tensor): group tokens, [batch_size, num_group_tokens, channels] Returns: projected_group_tokens (torch.Tensor): [batch_size, num_output_groups, channels] """ # [B, num_output_groups, C] <- [B, num_group_tokens, C] projected_group_tokens = self.mlp_inter(group_tokens) projected_group_tokens = self.norm_post_tokens(projected_group_tokens) return projected_group_tokens def forward(self, image_tokens, group_tokens): """ Args: image_tokens (`torch.Tensor`): image tokens, of shape [batch_size, input_length, channels] group_tokens (`torch.Tensor`): group tokens, [batch_size, num_group_tokens, channels] """ group_tokens = self.norm_tokens(group_tokens) image_tokens = self.norm_x(image_tokens) # [batch_size, num_output_groups, channels] projected_group_tokens = self.project_group_token(group_tokens) projected_group_tokens = self.pre_assign_attn(projected_group_tokens, image_tokens) new_image_tokens, attention = self.assign(projected_group_tokens, image_tokens) new_image_tokens += projected_group_tokens new_image_tokens = new_image_tokens + self.mlp_channels(self.norm_new_x(new_image_tokens)) return new_image_tokens, attention @dataclass class GroupViTModelOutput(ModelOutput): """ Args: loss (`torch.FloatTensor` of shape `(1,)`, *optional*, returned when `return_loss` is `True`): Contrastive loss for image-text similarity. logits_per_image (`torch.FloatTensor` of shape `(image_batch_size, text_batch_size)`): The scaled dot product scores between `image_embeds` and `text_embeds`. This represents the image-text similarity scores. logits_per_text (`torch.FloatTensor` of shape `(text_batch_size, image_batch_size)`): The scaled dot product scores between `text_embeds` and `image_embeds`. This represents the text-image similarity scores. segmentation_logits (`torch.FloatTensor` of shape `(batch_size, config.num_labels, logits_height, logits_width)`): Classification scores for each pixel. <Tip warning={true}> The logits returned do not necessarily have the same size as the `pixel_values` passed as inputs. This is to avoid doing two interpolations and lose some quality when a user needs to resize the logits to the original image size as post-processing. You should always check your logits shape and resize as needed. </Tip> text_embeds (`torch.FloatTensor` of shape `(batch_size, output_dim`): The text embeddings obtained by applying the projection layer to the pooled output of [`GroupViTTextModel`]. image_embeds (`torch.FloatTensor` of shape `(batch_size, output_dim`): The image embeddings obtained by applying the projection layer to the pooled output of [`GroupViTVisionModel`]. text_model_output (`BaseModelOutputWithPooling`): The output of the [`GroupViTTextModel`]. vision_model_output (`BaseModelOutputWithPooling`): The output of the [`GroupViTVisionModel`]. """ loss: Optional[torch.FloatTensor] = None logits_per_image: torch.FloatTensor = None logits_per_text: torch.FloatTensor = None segmentation_logits: torch.FloatTensor = None text_embeds: torch.FloatTensor = None image_embeds: torch.FloatTensor = None text_model_output: BaseModelOutputWithPooling = None vision_model_output: BaseModelOutputWithPooling = None def to_tuple(self) -> Tuple[Any]: return tuple( self[k] if k not in ["text_model_output", "vision_model_output"] else getattr(self, k).to_tuple() for k in self.keys() ) class GroupViTPatchEmbeddings(nn.Module): """ Image to Patch Embedding. """ def __init__( self, image_size: int = 224, patch_size: Union[int, Tuple[int, int]] = 16, num_channels: int = 3, embed_dim: int = 768, ): super().__init__() image_size = image_size if isinstance(image_size, collections.abc.Iterable) else (image_size, image_size) patch_size = patch_size if isinstance(patch_size, collections.abc.Iterable) else (patch_size, patch_size) num_patches = (image_size[1] // patch_size[1]) * (image_size[0] // patch_size[0]) self.image_size = image_size self.patch_size = patch_size self.num_patches = num_patches self.projection = nn.Conv2d(num_channels, embed_dim, kernel_size=patch_size, stride=patch_size) def forward(self, pixel_values: torch.Tensor, interpolate_pos_encoding: bool = False) -> torch.Tensor: batch_size, num_channels, height, width = pixel_values.shape if not interpolate_pos_encoding: if height != self.image_size[0] or width != self.image_size[1]: raise ValueError( f"Input image size ({height}*{width}) doesn't match model" f" ({self.image_size[0]}*{self.image_size[1]})." ) x = self.projection(pixel_values).flatten(2).transpose(1, 2) return x class GroupViTVisionEmbeddings(nn.Module): def __init__(self, config: GroupViTVisionConfig): super().__init__() self.patch_embeddings = GroupViTPatchEmbeddings( image_size=config.image_size, patch_size=config.patch_size, num_channels=config.num_channels, embed_dim=config.hidden_size, ) num_patches = self.patch_embeddings.num_patches self.position_embeddings = nn.Parameter(torch.zeros(1, num_patches, config.hidden_size)) self.dropout = nn.Dropout(config.dropout) self.layernorm = nn.LayerNorm(config.hidden_size, eps=config.layer_norm_eps) self.config = config def interpolate_pos_encoding(self, embeddings: torch.Tensor, height: int, width: int) -> torch.Tensor: """ This method allows to interpolate the pre-trained position encodings, to be able to use the model on higher resolution images. Source: https://github.com/facebookresearch/dino/blob/de9ee3df6cf39fac952ab558447af1fa1365362a/vision_transformer.py#L174 """ npatch = embeddings.shape[1] if npatch == self.position_embeddings.shape[1] and height == width: return self.position_embeddings patch_pos_embed = self.position_embeddings num_original_pos_embed = patch_pos_embed.shape[1] dim = embeddings.shape[-1] feat_height = height // self.config.patch_size feat_width = width // self.config.patch_size # we add a small number to avoid floating point error in the interpolation # see discussion at https://github.com/facebookresearch/dino/issues/8 feat_height, feat_width = feat_height + 0.1, feat_width + 0.1 original_height = original_width = math.sqrt(num_original_pos_embed) reshaped_patch_pos_embed = patch_pos_embed.reshape(1, int(original_height), int(original_width), dim).permute( 0, 3, 1, 2 ) scale_factor = (feat_height / original_height, feat_width / original_width) patch_pos_embed = nn.functional.interpolate( reshaped_patch_pos_embed, scale_factor=scale_factor, mode="bicubic", align_corners=False, ) patch_pos_embed = patch_pos_embed.permute(0, 2, 3, 1).view(1, -1, dim) return patch_pos_embed def forward(self, pixel_values: torch.Tensor, interpolate_pos_encoding: bool = False) -> torch.Tensor: batch_size, num_channels, height, width = pixel_values.shape embeddings = self.patch_embeddings(pixel_values, interpolate_pos_encoding=interpolate_pos_encoding) embeddings = self.layernorm(embeddings) batch_size, seq_len, _ = embeddings.size() # add positional encoding to each token if interpolate_pos_encoding: embeddings = embeddings + self.interpolate_pos_encoding(embeddings, height, width) else: embeddings = embeddings + self.position_embeddings embeddings = self.dropout(embeddings) return embeddings # Copied from transformers.models.clip.modeling_clip.CLIPTextEmbeddings with CLIP->GroupViT class GroupViTTextEmbeddings(nn.Module): def __init__(self, config: GroupViTTextConfig): super().__init__() embed_dim = config.hidden_size self.token_embedding = nn.Embedding(config.vocab_size, embed_dim) self.position_embedding = nn.Embedding(config.max_position_embeddings, embed_dim) # position_ids (1, len position emb) is contiguous in memory and exported when serialized self.register_buffer( "position_ids", torch.arange(config.max_position_embeddings).expand((1, -1)), persistent=False ) def forward( self, input_ids: Optional[torch.LongTensor] = None, position_ids: Optional[torch.LongTensor] = None, inputs_embeds: Optional[torch.FloatTensor] = None, ) -> torch.Tensor: seq_length = input_ids.shape[-1] if input_ids is not None else inputs_embeds.shape[-2] if position_ids is None: position_ids = self.position_ids[:, :seq_length] if inputs_embeds is None: inputs_embeds = self.token_embedding(input_ids) position_embeddings = self.position_embedding(position_ids) embeddings = inputs_embeds + position_embeddings return embeddings class GroupViTStage(nn.Module): """This corresponds to the `GroupingLayer` class in the GroupViT implementation.""" def __init__( self, config: GroupViTVisionConfig, depth: int, num_prev_group_token: int, num_group_token: int, num_output_group: int, ): super().__init__() self.depth = depth self.num_group_token = num_group_token if num_group_token > 0: self.group_token = nn.Parameter(torch.zeros(1, num_group_token, config.hidden_size)) else: self.group_token = None self.layers = nn.ModuleList([GroupViTEncoderLayer(config) for _ in range(depth)]) if num_group_token > 0: self.downsample = GroupViTTokenAssign( config=config, num_group_token=num_group_token, num_output_group=num_output_group, ) else: self.downsample = None if num_prev_group_token > 0 and num_group_token > 0: self.group_projector = nn.Sequential( nn.LayerNorm(config.hidden_size, eps=config.layer_norm_eps), GroupViTMixerMLP(config, num_prev_group_token, config.hidden_size // 2, num_group_token), ) else: self.group_projector = None @property def with_group_token(self): return self.group_token is not None def split_x(self, x): if self.with_group_token: return x[:, : -self.num_group_token], x[:, -self.num_group_token :] else: return x, None def concat_x(self, x: torch.Tensor, group_token: Optional[torch.Tensor] = None) -> torch.Tensor: if group_token is None: return x return torch.cat([x, group_token], dim=1) def forward( self, hidden_states: torch.Tensor, prev_group_token: Optional[torch.Tensor] = None, output_attentions: Optional[bool] = False, ) -> Tuple[torch.FloatTensor]: """ Args: hidden_states (`torch.FloatTensor`): input to the layer of shape `(batch, seq_len, embed_dim)` attention_mask (`torch.FloatTensor`): attention mask of size `(batch, 1, tgt_len, src_len)` where padding elements are indicated by very large negative values. `(config.encoder_attention_heads,)`. output_attentions (`bool`, *optional*): Whether or not to return the grouping tensors of Grouping block. """ if self.with_group_token: group_token = self.group_token.expand(hidden_states.size(0), -1, -1) if self.group_projector is not None: group_token = group_token + self.group_projector(prev_group_token) else: group_token = None x = hidden_states cat_x = self.concat_x(x, group_token) for layer in self.layers: layer_out = layer(cat_x, attention_mask=None, causal_attention_mask=None) cat_x = layer_out[0] x, group_token = self.split_x(cat_x) attention = None if self.downsample is not None: x, attention = self.downsample(x, group_token) outputs = (x, group_token) if output_attentions: outputs = outputs + (attention,) return outputs class GroupViTMLP(nn.Module): def __init__( self, config: GroupViTVisionConfig, hidden_size: Optional[int] = None, intermediate_size: Optional[int] = None, output_size: Optional[int] = None, ): super().__init__() self.config = config self.activation_fn = ACT2FN[config.hidden_act] hidden_size = hidden_size if hidden_size is not None else config.hidden_size intermediate_size = intermediate_size if intermediate_size is not None else config.intermediate_size output_size = output_size if output_size is not None else hidden_size self.fc1 = nn.Linear(hidden_size, intermediate_size) self.fc2 = nn.Linear(intermediate_size, output_size) def forward(self, hidden_states: torch.Tensor) -> torch.Tensor: hidden_states = self.fc1(hidden_states) hidden_states = self.activation_fn(hidden_states) hidden_states = self.fc2(hidden_states) return hidden_states class GroupViTMixerMLP(GroupViTMLP): def forward(self, x): x = super().forward(x.transpose(1, 2)) return x.transpose(1, 2) class GroupViTAttention(nn.Module): """Multi-headed attention from 'Attention Is All You Need' paper""" def __init__(self, config): super().__init__() self.config = config self.embed_dim = config.hidden_size self.num_heads = config.num_attention_heads self.head_dim = self.embed_dim // self.num_heads if self.head_dim * self.num_heads != self.embed_dim: raise ValueError( f"embed_dim must be divisible by num_heads (got `embed_dim`: {self.embed_dim} and `num_heads`:" f" {self.num_heads})." ) self.scale = self.head_dim**-0.5 self.dropout = config.attention_dropout self.k_proj = nn.Linear(self.embed_dim, self.embed_dim) self.v_proj = nn.Linear(self.embed_dim, self.embed_dim) self.q_proj = nn.Linear(self.embed_dim, self.embed_dim) self.out_proj = nn.Linear(self.embed_dim, self.embed_dim) def _shape(self, tensor: torch.Tensor, seq_len: int, bsz: int): return tensor.view(bsz, seq_len, self.num_heads, self.head_dim).transpose(1, 2).contiguous() def forward( self, hidden_states: torch.Tensor, attention_mask: Optional[torch.Tensor] = None, causal_attention_mask: Optional[torch.Tensor] = None, encoder_hidden_states: Optional[torch.FloatTensor] = None, output_attentions: Optional[bool] = False, ) -> Tuple[torch.Tensor, Optional[torch.Tensor], Optional[Tuple[torch.Tensor]]]: """Input shape: Batch x Time x Channel""" bsz, tgt_len, embed_dim = hidden_states.size() is_cross_attention = encoder_hidden_states is not None # get query proj query_states = self.q_proj(hidden_states) * self.scale if is_cross_attention: key_states = self._shape(self.k_proj(encoder_hidden_states), -1, bsz) value_states = self._shape(self.v_proj(encoder_hidden_states), -1, bsz) else: key_states = self._shape(self.k_proj(hidden_states), -1, bsz) value_states = self._shape(self.v_proj(hidden_states), -1, bsz) proj_shape = (bsz * self.num_heads, -1, self.head_dim) query_states = self._shape(query_states, tgt_len, bsz).view(*proj_shape) key_states = key_states.view(*proj_shape) value_states = value_states.view(*proj_shape) src_len = key_states.size(1) attn_weights = torch.bmm(query_states, key_states.transpose(1, 2)) if attn_weights.size() != (bsz * self.num_heads, tgt_len, src_len): raise ValueError( f"Attention weights should be of size {(bsz * self.num_heads, tgt_len, src_len)}, but is" f" {attn_weights.size()}" ) # apply the causal_attention_mask first if causal_attention_mask is not None: if causal_attention_mask.size() != (bsz, 1, tgt_len, src_len): raise ValueError( f"Attention mask should be of size {(bsz, 1, tgt_len, src_len)}, but is" f" {causal_attention_mask.size()}" ) attn_weights = attn_weights.view(bsz, self.num_heads, tgt_len, src_len) + causal_attention_mask attn_weights = attn_weights.view(bsz * self.num_heads, tgt_len, src_len) if attention_mask is not None: if attention_mask.size() != (bsz, 1, tgt_len, src_len): raise ValueError( f"Attention mask should be of size {(bsz, 1, tgt_len, src_len)}, but is {attention_mask.size()}" ) attn_weights = attn_weights.view(bsz, self.num_heads, tgt_len, src_len) + attention_mask attn_weights = attn_weights.view(bsz * self.num_heads, tgt_len, src_len) attn_weights = nn.functional.softmax(attn_weights, dim=-1) if output_attentions: # this operation is a bit akward, but it's required to # make sure that attn_weights keeps its gradient. # In order to do so, attn_weights have to reshaped # twice and have to be reused in the following attn_weights_reshaped = attn_weights.view(bsz, self.num_heads, tgt_len, src_len) attn_weights = attn_weights_reshaped.view(bsz * self.num_heads, tgt_len, src_len) else: attn_weights_reshaped = None attn_probs = nn.functional.dropout(attn_weights, p=self.dropout, training=self.training) attn_output = torch.bmm(attn_probs, value_states) if attn_output.size() != (bsz * self.num_heads, tgt_len, self.head_dim): raise ValueError( f"`attn_output` should be of size {(bsz, self.num_heads, tgt_len, self.head_dim)}, but is" f" {attn_output.size()}" ) attn_output = attn_output.view(bsz, self.num_heads, tgt_len, self.head_dim) attn_output = attn_output.transpose(1, 2) attn_output = attn_output.reshape(bsz, tgt_len, embed_dim) attn_output = self.out_proj(attn_output) return attn_output, attn_weights_reshaped # Copied from transformers.models.clip.modeling_clip.CLIPEncoderLayer with CLIP->GroupViT class GroupViTEncoderLayer(nn.Module): def __init__(self, config: GroupViTConfig): super().__init__() self.embed_dim = config.hidden_size self.self_attn = GroupViTAttention(config) self.layer_norm1 = nn.LayerNorm(self.embed_dim, eps=config.layer_norm_eps) self.mlp = GroupViTMLP(config) self.layer_norm2 = nn.LayerNorm(self.embed_dim, eps=config.layer_norm_eps) def forward( self, hidden_states: torch.Tensor, attention_mask: torch.Tensor, causal_attention_mask: torch.Tensor, output_attentions: Optional[bool] = False, ) -> Tuple[torch.FloatTensor]: """ Args: hidden_states (`torch.FloatTensor`): input to the layer of shape `(batch, seq_len, embed_dim)` attention_mask (`torch.FloatTensor`): attention mask of size `(batch, 1, tgt_len, src_len)` where padding elements are indicated by very large negative values. `(config.encoder_attention_heads,)`. output_attentions (`bool`, *optional*): Whether or not to return the attentions tensors of all attention layers. See `attentions` under returned tensors for more detail. """ residual = hidden_states hidden_states = self.layer_norm1(hidden_states) hidden_states, attn_weights = self.self_attn( hidden_states=hidden_states, attention_mask=attention_mask, causal_attention_mask=causal_attention_mask, output_attentions=output_attentions, ) hidden_states = residual + hidden_states residual = hidden_states hidden_states = self.layer_norm2(hidden_states) hidden_states = self.mlp(hidden_states) hidden_states = residual + hidden_states outputs = (hidden_states,) if output_attentions: outputs += (attn_weights,) return outputs class GroupViTPreTrainedModel(PreTrainedModel): """ An abstract class to handle weights initialization and a simple interface for downloading and loading pretrained models. """ config_class = GroupViTConfig base_model_prefix = "groupvit" supports_gradient_checkpointing = True def _init_weights(self, module): """Initialize the weights""" init_range = self.config.initializer_range if isinstance(module, (nn.Linear, nn.Conv2d)): # Slightly different from the TF version which uses truncated_normal for initialization # cf https://github.com/pytorch/pytorch/pull/5617 module.weight.data.normal_(mean=0.0, std=init_range) if module.bias is not None: module.bias.data.zero_() elif isinstance(module, nn.LayerNorm): module.bias.data.zero_() module.weight.data.fill_(1.0) factor = self.config.initializer_factor if isinstance(module, GroupViTTextEmbeddings): module.token_embedding.weight.data.normal_(mean=0.0, std=factor * 0.02) module.position_embedding.weight.data.normal_(mean=0.0, std=factor * 0.02) elif isinstance(module, GroupViTAttention): factor = self.config.initializer_factor in_proj_std = (module.embed_dim**-0.5) * ((2 * module.config.num_hidden_layers) ** -0.5) * factor out_proj_std = (module.embed_dim**-0.5) * factor nn.init.normal_(module.q_proj.weight, std=in_proj_std) nn.init.normal_(module.k_proj.weight, std=in_proj_std) nn.init.normal_(module.v_proj.weight, std=in_proj_std) nn.init.normal_(module.out_proj.weight, std=out_proj_std) elif isinstance(module, GroupViTMLP): factor = self.config.initializer_factor in_proj_std = (module.config.hidden_size**-0.5) * ((2 * module.config.num_hidden_layers) ** -0.5) * factor fc_std = (2 * module.config.hidden_size) ** -0.5 * factor nn.init.normal_(module.fc1.weight, std=fc_std) nn.init.normal_(module.fc2.weight, std=in_proj_std) GROUPVIT_START_DOCSTRING = r""" This model is a PyTorch [torch.nn.Module](https://pytorch.org/docs/stable/nn.html#torch.nn.Module) subclass. Use it as a regular PyTorch Module and refer to the PyTorch documentation for all matter related to general usage and behavior. Parameters: config ([`GroupViTConfig`]): Model configuration class with all the parameters of the model. Initializing with a config file does not load the weights associated with the model, only the configuration. Check out the [`~PreTrainedModel.from_pretrained`] method to load the model weights. """ GROUPVIT_TEXT_INPUTS_DOCSTRING = r""" Args: input_ids (`torch.LongTensor` of shape `(batch_size, sequence_length)`): Indices of input sequence tokens in the vocabulary. Padding will be ignored by default should you provide it. Indices can be obtained using [`CLIPTokenizer`]. See [`PreTrainedTokenizer.encode`] and [`PreTrainedTokenizer.__call__`] for details. [What are input IDs?](../glossary#input-ids) attention_mask (`torch.Tensor` of shape `(batch_size, sequence_length)`, *optional*): Mask to avoid performing attention on padding token indices. Mask values selected in `[0, 1]`: - 1 for tokens that are **not masked**, - 0 for tokens that are **masked**. [What are attention masks?](../glossary#attention-mask) position_ids (`torch.LongTensor` of shape `(batch_size, sequence_length)`, *optional*): Indices of positions of each input sequence tokens in the position embeddings. Selected in the range `[0, config.max_position_embeddings - 1]`. [What are position IDs?](../glossary#position-ids) output_attentions (`bool`, *optional*): Whether or not to return the attentions tensors of all attention layers. See `attentions` under returned tensors for more detail. output_hidden_states (`bool`, *optional*): Whether or not to return the hidden states of all layers. See `hidden_states` under returned tensors for more detail. return_dict (`bool`, *optional*): Whether or not to return a [`~utils.ModelOutput`] instead of a plain tuple. """ GROUPVIT_VISION_INPUTS_DOCSTRING = r""" Args: pixel_values (`torch.FloatTensor` of shape `(batch_size, num_channels, height, width)`): Pixel values. Padding will be ignored by default should you provide it. Pixel values can be obtained using [`AutoImageProcessor`]. See [`CLIPImageProcessor.__call__`] for details. output_attentions (`bool`, *optional*): Whether or not to return the attentions tensors of all attention layers. See `attentions` under returned tensors for more detail. output_hidden_states (`bool`, *optional*): Whether or not to return the hidden states of all layers. See `hidden_states` under returned tensors for more detail. return_dict (`bool`, *optional*): Whether or not to return a [`~utils.ModelOutput`] instead of a plain tuple. """ GROUPVIT_INPUTS_DOCSTRING = r""" Args: input_ids (`torch.LongTensor` of shape `(batch_size, sequence_length)`): Indices of input sequence tokens in the vocabulary. Padding will be ignored by default should you provide it. Indices can be obtained using [`CLIPTokenizer`]. See [`PreTrainedTokenizer.encode`] and [`PreTrainedTokenizer.__call__`] for details. [What are input IDs?](../glossary#input-ids) attention_mask (`torch.Tensor` of shape `(batch_size, sequence_length)`, *optional*): Mask to avoid performing attention on padding token indices. Mask values selected in `[0, 1]`: - 1 for tokens that are **not masked**, - 0 for tokens that are **masked**. [What are attention masks?](../glossary#attention-mask) position_ids (`torch.LongTensor` of shape `(batch_size, sequence_length)`, *optional*): Indices of positions of each input sequence tokens in the position embeddings. Selected in the range `[0, config.max_position_embeddings - 1]`. [What are position IDs?](../glossary#position-ids) pixel_values (`torch.FloatTensor` of shape `(batch_size, num_channels, height, width)`): Pixel values. Pixel values can be obtained using [`AutoImageProcessor`]. See [`CLIPImageProcessor.__call__`] for details. return_loss (`bool`, *optional*): Whether or not to return the contrastive loss. output_attentions (`bool`, *optional*): Whether or not to return the attentions tensors of all attention layers. See `attentions` under returned tensors for more detail. output_hidden_states (`bool`, *optional*): Whether or not to return the hidden states of all layers. See `hidden_states` under returned tensors for more detail. return_dict (`bool`, *optional*): Whether or not to return a [`~utils.ModelOutput`] instead of a plain tuple. """ class GroupViTVisionEncoder(nn.Module): def __init__(self, config: GroupViTVisionConfig) -> None: super().__init__() self.config = config self.stages = nn.ModuleList( [ GroupViTStage( config=config, depth=config.depths[i], num_group_token=config.num_group_tokens[i], num_output_group=config.num_output_groups[i], num_prev_group_token=config.num_output_groups[i - 1] if i > 0 else 0, ) for i in range(len(config.depths)) ] ) self.gradient_checkpointing = False def forward( self, hidden_states: torch.Tensor, output_hidden_states: Optional[bool] = None, output_attentions: Optional[bool] = None, return_dict: Optional[bool] = None, ) -> Union[tuple, BaseModelOutput]: output_attentions = output_attentions if output_attentions is not None else self.config.output_attentions output_hidden_states = ( output_hidden_states if output_hidden_states is not None else self.config.output_hidden_states ) return_dict = return_dict if return_dict is not None else self.config.use_return_dict all_hidden_states = () if output_hidden_states else None all_groupings = () if output_attentions else None group_tokens = None for i, stage in enumerate(self.stages): if output_hidden_states: all_hidden_states = all_hidden_states + (hidden_states,) layer_outputs = stage(hidden_states, group_tokens, output_attentions) hidden_states = layer_outputs[0] group_tokens = layer_outputs[1] if output_attentions and layer_outputs[2] is not None: all_groupings = all_groupings + (layer_outputs[2],) if output_hidden_states: all_hidden_states = all_hidden_states + (hidden_states,) if not return_dict: return tuple(v for v in [hidden_states, all_hidden_states, all_groupings] if v is not None) return BaseModelOutput( last_hidden_state=hidden_states, hidden_states=all_hidden_states, attentions=all_groupings ) class GroupViTTextEncoder(nn.Module): """ Transformer encoder consisting of `config.num_hidden_layers` self-attention layers. Each layer is a [`GroupViTEncoderLayer`]. Args: config: GroupViTTextConfig """ def __init__(self, config: GroupViTTextConfig): super().__init__() self.config = config self.layers = nn.ModuleList([GroupViTEncoderLayer(config) for _ in range(config.num_hidden_layers)]) self.gradient_checkpointing = False def forward( self, inputs_embeds, attention_mask: Optional[torch.Tensor] = None, causal_attention_mask: Optional[torch.Tensor] = None, output_attentions: Optional[bool] = None, output_hidden_states: Optional[bool] = None, return_dict: Optional[bool] = None, ) -> Union[Tuple, BaseModelOutput]: r""" Args: inputs_embeds (`torch.FloatTensor` of shape `(batch_size, sequence_length, hidden_size)`): Optionally, instead of passing `input_ids` you can choose to directly pass an embedded representation. This is useful if you want more control over how to convert `input_ids` indices into associated vectors than the model's internal embedding lookup matrix. attention_mask (`torch.Tensor` of shape `(batch_size, sequence_length)`, *optional*): Mask to avoid performing attention on padding token indices. Mask values selected in `[0, 1]`: - 1 for tokens that are **not masked**, - 0 for tokens that are **masked**. [What are attention masks?](../glossary#attention-mask) causal_attention_mask (`torch.Tensor` of shape `(batch_size, sequence_length)`, *optional*): Causal mask for the text model. Mask values selected in `[0, 1]`: - 1 for tokens that are **not masked**, - 0 for tokens that are **masked**. [What are attention masks?](../glossary#attention-mask) output_attentions (`bool`, *optional*): Whether or not to return the attentions tensors of all attention layers. See `attentions` under returned tensors for more detail. output_hidden_states (`bool`, *optional*): Whether or not to return the hidden states of all layers. See `hidden_states` under returned tensors for more detail. return_dict (`bool`, *optional*): Whether or not to return a [`~utils.ModelOutput`] instead of a plain tuple. """ output_attentions = output_attentions if output_attentions is not None else self.config.output_attentions output_hidden_states = ( output_hidden_states if output_hidden_states is not None else self.config.output_hidden_states ) return_dict = return_dict if return_dict is not None else self.config.use_return_dict encoder_states = () if output_hidden_states else None all_attentions = () if output_attentions else None hidden_states = inputs_embeds for idx, encoder_layer in enumerate(self.layers): if output_hidden_states: encoder_states = encoder_states + (hidden_states,) if self.gradient_checkpointing and self.training: layer_outputs = self._gradient_checkpointing_func( encoder_layer.__call__, hidden_states, attention_mask, causal_attention_mask, output_attentions, ) else: layer_outputs = encoder_layer( hidden_states, attention_mask, causal_attention_mask, output_attentions=output_attentions, ) hidden_states = layer_outputs[0] if output_attentions: all_attentions = all_attentions + (layer_outputs[1],) if output_hidden_states: encoder_states = encoder_states + (hidden_states,) if not return_dict: return tuple(v for v in [hidden_states, encoder_states, all_attentions] if v is not None) return BaseModelOutput( last_hidden_state=hidden_states, hidden_states=encoder_states, attentions=all_attentions ) # Copied from transformers.models.clip.modeling_clip.CLIPTextTransformer with CLIPText->GroupViTText, CLIPEncoder->GroupViTTextEncoder, CLIP_TEXT->GROUPVIT_TEXT class GroupViTTextTransformer(nn.Module): def __init__(self, config: GroupViTTextConfig): super().__init__() self.config = config embed_dim = config.hidden_size self.embeddings = GroupViTTextEmbeddings(config) self.encoder = GroupViTTextEncoder(config) self.final_layer_norm = nn.LayerNorm(embed_dim, eps=config.layer_norm_eps) # For `pooled_output` computation self.eos_token_id = config.eos_token_id @add_start_docstrings_to_model_forward(GROUPVIT_TEXT_INPUTS_DOCSTRING) @replace_return_docstrings(output_type=BaseModelOutputWithPooling, config_class=GroupViTTextConfig) def forward( self, input_ids: Optional[torch.Tensor] = None, attention_mask: Optional[torch.Tensor] = None, position_ids: Optional[torch.Tensor] = None, output_attentions: Optional[bool] = None, output_hidden_states: Optional[bool] = None, return_dict: Optional[bool] = None, ) -> Union[Tuple, BaseModelOutputWithPooling]: r""" Returns: """ output_attentions = output_attentions if output_attentions is not None else self.config.output_attentions output_hidden_states = ( output_hidden_states if output_hidden_states is not None else self.config.output_hidden_states ) return_dict = return_dict if return_dict is not None else self.config.use_return_dict if input_ids is None: raise ValueError("You have to specify input_ids") input_shape = input_ids.size() input_ids = input_ids.view(-1, input_shape[-1]) hidden_states = self.embeddings(input_ids=input_ids, position_ids=position_ids) # CLIP's text model uses causal mask, prepare it here. # https://github.com/openai/CLIP/blob/cfcffb90e69f37bf2ff1e988237a0fbe41f33c04/clip/model.py#L324 causal_attention_mask = _create_4d_causal_attention_mask( input_shape, hidden_states.dtype, device=hidden_states.device ) # expand attention_mask if attention_mask is not None: # [bsz, seq_len] -> [bsz, 1, tgt_seq_len, src_seq_len] attention_mask = _prepare_4d_attention_mask(attention_mask, hidden_states.dtype) encoder_outputs = self.encoder( inputs_embeds=hidden_states, attention_mask=attention_mask, causal_attention_mask=causal_attention_mask, output_attentions=output_attentions, output_hidden_states=output_hidden_states, return_dict=return_dict, ) last_hidden_state = encoder_outputs[0] last_hidden_state = self.final_layer_norm(last_hidden_state) if self.eos_token_id == 2: # The `eos_token_id` was incorrect before PR #24773: Let's keep what have been done here. # A CLIP model with such `eos_token_id` in the config can't work correctly with extra new tokens added # ------------------------------------------------------------ # text_embeds.shape = [batch_size, sequence_length, transformer.width] # take features from the eot embedding (eot_token is the highest number in each sequence) # casting to torch.int for onnx compatibility: argmax doesn't support int64 inputs with opset 14 pooled_output = last_hidden_state[ torch.arange(last_hidden_state.shape[0], device=last_hidden_state.device), input_ids.to(dtype=torch.int, device=last_hidden_state.device).argmax(dim=-1), ] else: # The config gets updated `eos_token_id` from PR #24773 (so the use of exta new tokens is possible) pooled_output = last_hidden_state[ torch.arange(last_hidden_state.shape[0], device=last_hidden_state.device), # We need to get the first position of `eos_token_id` value (`pad_token_ids` might equal to `eos_token_id`) (input_ids.to(dtype=torch.int, device=last_hidden_state.device) == self.eos_token_id) .int() .argmax(dim=-1), ] if not return_dict: return (last_hidden_state, pooled_output) + encoder_outputs[1:] return BaseModelOutputWithPooling( last_hidden_state=last_hidden_state, pooler_output=pooled_output, hidden_states=encoder_outputs.hidden_states, attentions=encoder_outputs.attentions, ) class GroupViTTextModel(GroupViTPreTrainedModel): config_class = GroupViTTextConfig def __init__(self, config: GroupViTTextConfig): super().__init__(config) self.text_model = GroupViTTextTransformer(config) # Initialize weights and apply final processing self.post_init() def get_input_embeddings(self) -> nn.Module: return self.text_model.embeddings.token_embedding def set_input_embeddings(self, value): self.text_model.embeddings.token_embedding = value @add_start_docstrings_to_model_forward(GROUPVIT_TEXT_INPUTS_DOCSTRING) @replace_return_docstrings(output_type=BaseModelOutputWithPooling, config_class=GroupViTTextConfig) def forward( self, input_ids: Optional[torch.Tensor] = None, attention_mask: Optional[torch.Tensor] = None, position_ids: Optional[torch.Tensor] = None, output_attentions: Optional[bool] = None, output_hidden_states: Optional[bool] = None, return_dict: Optional[bool] = None, ) -> Union[Tuple, BaseModelOutputWithPooling]: r""" Returns: Examples: ```python >>> from transformers import CLIPTokenizer, GroupViTTextModel >>> tokenizer = CLIPTokenizer.from_pretrained("nvidia/groupvit-gcc-yfcc") >>> model = GroupViTTextModel.from_pretrained("nvidia/groupvit-gcc-yfcc") >>> inputs = tokenizer(["a photo of a cat", "a photo of a dog"], padding=True, return_tensors="pt") >>> outputs = model(**inputs) >>> last_hidden_state = outputs.last_hidden_state >>> pooled_output = outputs.pooler_output # pooled (EOS token) states ```""" return self.text_model( input_ids=input_ids, attention_mask=attention_mask, position_ids=position_ids, output_attentions=output_attentions, output_hidden_states=output_hidden_states, return_dict=return_dict, ) class GroupViTVisionTransformer(nn.Module): def __init__(self, config: GroupViTVisionConfig): super().__init__() self.config = config embed_dim = config.hidden_size self.embeddings = GroupViTVisionEmbeddings(config) self.encoder = GroupViTVisionEncoder(config) self.layernorm = nn.LayerNorm(embed_dim, eps=config.layer_norm_eps) @add_start_docstrings_to_model_forward(GROUPVIT_VISION_INPUTS_DOCSTRING) @replace_return_docstrings(output_type=BaseModelOutputWithPooling, config_class=GroupViTVisionConfig) def forward( self, pixel_values: Optional[torch.FloatTensor] = None, output_hidden_states: Optional[bool] = None, output_attentions: Optional[bool] = None, return_dict: Optional[bool] = None, ) -> Union[Tuple, BaseModelOutputWithPooling]: r""" Returns: """ output_attentions = output_attentions if output_attentions is not None else self.config.output_attentions output_hidden_states = ( output_hidden_states if output_hidden_states is not None else self.config.output_hidden_states ) return_dict = return_dict if return_dict is not None else self.config.use_return_dict if pixel_values is None: raise ValueError("You have to specify pixel_values") hidden_states = self.embeddings(pixel_values) encoder_outputs = self.encoder( hidden_states=hidden_states, output_hidden_states=output_hidden_states, output_attentions=output_attentions, return_dict=return_dict, ) last_hidden_state = encoder_outputs[0] # normalize the last hidden state last_hidden_state = self.layernorm(last_hidden_state) pooled_output = last_hidden_state.mean(dim=1) if not return_dict: return (last_hidden_state, pooled_output) + encoder_outputs[1:] return BaseModelOutputWithPooling( last_hidden_state=last_hidden_state, pooler_output=pooled_output, hidden_states=encoder_outputs.hidden_states, attentions=encoder_outputs.attentions, ) class GroupViTVisionModel(GroupViTPreTrainedModel): config_class = GroupViTVisionConfig main_input_name = "pixel_values" def __init__(self, config: GroupViTVisionConfig): super().__init__(config) self.vision_model = GroupViTVisionTransformer(config) # Initialize weights and apply final processing self.post_init() def get_input_embeddings(self) -> GroupViTPatchEmbeddings: return self.vision_model.embeddings.patch_embeddings @add_start_docstrings_to_model_forward(GROUPVIT_VISION_INPUTS_DOCSTRING) @replace_return_docstrings(output_type=BaseModelOutputWithPooling, config_class=GroupViTVisionConfig) def forward( self, pixel_values: Optional[torch.FloatTensor] = None, output_attentions: Optional[bool] = None, output_hidden_states: Optional[bool] = None, return_dict: Optional[bool] = None, ) -> Union[Tuple, BaseModelOutputWithPooling]: r""" Returns: Examples: ```python >>> from PIL import Image >>> import requests >>> from transformers import AutoProcessor, GroupViTVisionModel >>> processor = AutoProcessor.from_pretrained("nvidia/groupvit-gcc-yfcc") >>> model = GroupViTVisionModel.from_pretrained("nvidia/groupvit-gcc-yfcc") >>> url = "http://images.cocodataset.org/val2017/000000039769.jpg" >>> image = Image.open(requests.get(url, stream=True).raw) >>> inputs = processor(images=image, return_tensors="pt") >>> outputs = model(**inputs) >>> last_hidden_state = outputs.last_hidden_state >>> pooled_output = outputs.pooler_output # pooled CLS states ```""" return self.vision_model( pixel_values=pixel_values, output_attentions=output_attentions, output_hidden_states=output_hidden_states, return_dict=return_dict, ) @add_start_docstrings(GROUPVIT_START_DOCSTRING) class GroupViTModel(GroupViTPreTrainedModel): config_class = GroupViTConfig def __init__(self, config: GroupViTConfig): super().__init__(config) if not isinstance(config.text_config, GroupViTTextConfig): raise ValueError( "config.text_config is expected to be of type GroupViTTextConfig but is of type" f" {type(config.text_config)}." ) if not isinstance(config.vision_config, GroupViTVisionConfig): raise ValueError( "config.vision_config is expected to be of type GroupViTVisionConfig but is of type" f" {type(config.vision_config)}." ) text_config = config.text_config vision_config = config.vision_config self.projection_dim = config.projection_dim self.projection_intermediate_dim = config.projection_intermediate_dim self.text_embed_dim = text_config.hidden_size self.vision_embed_dim = vision_config.hidden_size self.text_model = GroupViTTextTransformer(text_config) self.vision_model = GroupViTVisionTransformer(vision_config) self.visual_projection = nn.Sequential( nn.Linear(self.vision_embed_dim, self.projection_intermediate_dim, bias=True), nn.BatchNorm1d(self.projection_intermediate_dim), nn.ReLU(inplace=True), nn.Linear(self.projection_intermediate_dim, self.projection_dim, bias=True), ) self.text_projection = nn.Sequential( nn.Linear(self.text_embed_dim, self.projection_intermediate_dim, bias=True), nn.BatchNorm1d(self.projection_intermediate_dim), nn.ReLU(inplace=True), nn.Linear(self.projection_intermediate_dim, self.projection_dim, bias=True), ) self.logit_scale = nn.Parameter(torch.tensor(self.config.logit_scale_init_value)) # Initialize weights and apply final processing self.post_init() @add_start_docstrings_to_model_forward(GROUPVIT_TEXT_INPUTS_DOCSTRING) def get_text_features( self, input_ids: Optional[torch.Tensor] = None, attention_mask: Optional[torch.Tensor] = None, position_ids: Optional[torch.Tensor] = None, output_attentions: Optional[bool] = None, output_hidden_states: Optional[bool] = None, return_dict: Optional[bool] = None, ) -> torch.FloatTensor: r""" Returns: text_features (`torch.FloatTensor` of shape `(batch_size, output_dim`): The text embeddings obtained by applying the projection layer to the pooled output of [`GroupViTTextModel`]. Examples: ```python >>> from transformers import CLIPTokenizer, GroupViTModel >>> model = GroupViTModel.from_pretrained("nvidia/groupvit-gcc-yfcc") >>> tokenizer = CLIPTokenizer.from_pretrained("nvidia/groupvit-gcc-yfcc") >>> inputs = tokenizer(["a photo of a cat", "a photo of a dog"], padding=True, return_tensors="pt") >>> text_features = model.get_text_features(**inputs) ```""" # Use GROUPVIT model's config for some fields (if specified) instead of those of vision & text components. output_attentions = output_attentions if output_attentions is not None else self.config.output_attentions output_hidden_states = ( output_hidden_states if output_hidden_states is not None else self.config.output_hidden_states ) return_dict = return_dict if return_dict is not None else self.config.use_return_dict text_outputs = self.text_model( input_ids=input_ids, attention_mask=attention_mask, position_ids=position_ids, output_attentions=output_attentions, output_hidden_states=output_hidden_states, return_dict=return_dict, ) pooled_output = text_outputs[1] text_features = self.text_projection(pooled_output) return text_features @add_start_docstrings_to_model_forward(GROUPVIT_VISION_INPUTS_DOCSTRING) def get_image_features( self, pixel_values: Optional[torch.FloatTensor] = None, output_attentions: Optional[bool] = None, output_hidden_states: Optional[bool] = None, return_dict: Optional[bool] = None, ) -> torch.FloatTensor: r""" Returns: image_features (`torch.FloatTensor` of shape `(batch_size, output_dim`): The image embeddings obtained by applying the projection layer to the pooled output of [`GroupViTVisionModel`]. Examples: ```python >>> from PIL import Image >>> import requests >>> from transformers import AutoProcessor, GroupViTModel >>> model = GroupViTModel.from_pretrained("nvidia/groupvit-gcc-yfcc") >>> processor = AutoProcessor.from_pretrained("nvidia/groupvit-gcc-yfcc") >>> url = "http://images.cocodataset.org/val2017/000000039769.jpg" >>> image = Image.open(requests.get(url, stream=True).raw) >>> inputs = processor(images=image, return_tensors="pt") >>> image_features = model.get_image_features(**inputs) ```""" # Use GROUPVIT model's config for some fields (if specified) instead of those of vision & text components. output_attentions = output_attentions if output_attentions is not None else self.config.output_attentions output_hidden_states = ( output_hidden_states if output_hidden_states is not None else self.config.output_hidden_states ) return_dict = return_dict if return_dict is not None else self.config.use_return_dict vision_outputs = self.vision_model( pixel_values=pixel_values, output_attentions=output_attentions, output_hidden_states=output_hidden_states, return_dict=return_dict, ) pooled_output = vision_outputs[1] # pooled_output image_features = self.visual_projection(pooled_output) return image_features @add_start_docstrings_to_model_forward(GROUPVIT_INPUTS_DOCSTRING) @replace_return_docstrings(output_type=GroupViTModelOutput, config_class=GroupViTConfig) def forward( self, input_ids: Optional[torch.LongTensor] = None, pixel_values: Optional[torch.FloatTensor] = None, attention_mask: Optional[torch.Tensor] = None, position_ids: Optional[torch.LongTensor] = None, return_loss: Optional[bool] = None, output_attentions: Optional[bool] = None, output_hidden_states: Optional[bool] = None, output_segmentation: Optional[bool] = None, return_dict: Optional[bool] = None, ) -> Union[Tuple, GroupViTModelOutput]: r""" Returns: Examples: ```python >>> from PIL import Image >>> import requests >>> from transformers import AutoProcessor, GroupViTModel >>> model = GroupViTModel.from_pretrained("nvidia/groupvit-gcc-yfcc") >>> processor = AutoProcessor.from_pretrained("nvidia/groupvit-gcc-yfcc") >>> url = "http://images.cocodataset.org/val2017/000000039769.jpg" >>> image = Image.open(requests.get(url, stream=True).raw) >>> inputs = processor( ... text=["a photo of a cat", "a photo of a dog"], images=image, return_tensors="pt", padding=True ... ) >>> outputs = model(**inputs) >>> logits_per_image = outputs.logits_per_image # this is the image-text similarity score >>> probs = logits_per_image.softmax(dim=1) # we can take the softmax to get the label probabilities ```""" # Use GROUPVIT model's config for some fields (if specified) instead of those of vision & text components. output_attentions = output_attentions if output_attentions is not None else self.config.output_attentions output_segmentation = ( output_segmentation if output_segmentation is not None else self.config.output_segmentation ) if output_segmentation: output_attentions = True output_hidden_states = ( output_hidden_states if output_hidden_states is not None else self.config.output_hidden_states ) return_dict = return_dict if return_dict is not None else self.config.use_return_dict vision_outputs = self.vision_model( pixel_values=pixel_values, output_attentions=output_attentions, output_hidden_states=output_hidden_states, return_dict=return_dict, ) text_outputs = self.text_model( input_ids=input_ids, attention_mask=attention_mask, position_ids=position_ids, output_attentions=output_attentions, output_hidden_states=output_hidden_states, return_dict=return_dict, ) image_embeds = vision_outputs[1] image_embeds = self.visual_projection(image_embeds) text_embeds = text_outputs[1] text_embeds = self.text_projection(text_embeds) # normalized features image_embeds = image_embeds / image_embeds.norm(dim=-1, keepdim=True) text_embeds = text_embeds / text_embeds.norm(dim=-1, keepdim=True) # cosine similarity as logits logit_scale = self.logit_scale.exp() logits_per_text = torch.matmul(text_embeds, image_embeds.t()) * logit_scale logits_per_image = logits_per_text.t() seg_logits = None if output_segmentation: # grouped features # [batch_size_image, num_group, hidden_size] image_group_embeds = vision_outputs[0] # [batch_size_image*num_group, hidden_size] image_group_embeds = self.visual_projection(image_group_embeds.reshape(-1, image_group_embeds.shape[-1])) if output_hidden_states: attentions = vision_outputs[3] else: attentions = vision_outputs[2] # [batch_size_image, num_group, height, width] grouping = get_grouping_from_attentions(attentions, pixel_values.shape[2:]) # normalized features image_group_embeds = image_group_embeds / image_group_embeds.norm(dim=-1, keepdim=True) # [batch_size_image x num_group, batch_size_text] logits_per_image_group = torch.matmul(image_group_embeds, text_embeds.t()) * logit_scale # [batch_size_image, batch_size_text, num_group] logits_per_image_group = logits_per_image_group.reshape( image_embeds.shape[0], -1, text_embeds.shape[0] ).permute(0, 2, 1) # [batch_size_image, batch_size_text, height x width] flatten_grouping = grouping.reshape(grouping.shape[0], grouping.shape[1], -1) # [batch_size_image, batch_size_text, height, width] seg_logits = torch.matmul(logits_per_image_group, flatten_grouping) * logit_scale seg_logits = seg_logits.reshape( seg_logits.shape[0], seg_logits.shape[1], grouping.shape[2], grouping.shape[3] ) loss = None if return_loss: loss = groupvit_loss(logits_per_text) if not return_dict: if seg_logits is not None: output = ( logits_per_image, logits_per_text, seg_logits, text_embeds, image_embeds, text_outputs, vision_outputs, ) else: output = (logits_per_image, logits_per_text, text_embeds, image_embeds, text_outputs, vision_outputs) return ((loss,) + output) if loss is not None else output return GroupViTModelOutput( loss=loss, logits_per_image=logits_per_image, logits_per_text=logits_per_text, segmentation_logits=seg_logits, text_embeds=text_embeds, image_embeds=image_embeds, text_model_output=text_outputs, vision_model_output=vision_outputs, )

transformers/src/transformers/models/groupvit/modeling_groupvit.py/0

{ "file_path": "transformers/src/transformers/models/groupvit/modeling_groupvit.py", "repo_id": "transformers", "token_count": 29453 }

96

# coding=utf-8 # Copyright 2010, The Microsoft Research Asia LayoutLM Team authors # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. """ LayoutLM model configuration""" from collections import OrderedDict from typing import Any, List, Mapping, Optional from ... import PretrainedConfig, PreTrainedTokenizer from ...onnx import OnnxConfig, PatchingSpec from ...utils import TensorType, is_torch_available, logging logger = logging.get_logger(__name__) LAYOUTLM_PRETRAINED_CONFIG_ARCHIVE_MAP = { "microsoft/layoutlm-base-uncased": ( "https://huggingface.co/microsoft/layoutlm-base-uncased/resolve/main/config.json" ), "microsoft/layoutlm-large-uncased": ( "https://huggingface.co/microsoft/layoutlm-large-uncased/resolve/main/config.json" ), } class LayoutLMConfig(PretrainedConfig): r""" This is the configuration class to store the configuration of a [`LayoutLMModel`]. It is used to instantiate a LayoutLM model according to the specified arguments, defining the model architecture. Instantiating a configuration with the defaults will yield a similar configuration to that of the LayoutLM [microsoft/layoutlm-base-uncased](https://huggingface.co/microsoft/layoutlm-base-uncased) architecture. Configuration objects inherit from [`BertConfig`] and can be used to control the model outputs. Read the documentation from [`BertConfig`] for more information. Args: vocab_size (`int`, *optional*, defaults to 30522): Vocabulary size of the LayoutLM model. Defines the different tokens that can be represented by the *inputs_ids* passed to the forward method of [`LayoutLMModel`]. hidden_size (`int`, *optional*, defaults to 768): Dimensionality of the encoder layers and the pooler layer. num_hidden_layers (`int`, *optional*, defaults to 12): Number of hidden layers in the Transformer encoder. num_attention_heads (`int`, *optional*, defaults to 12): Number of attention heads for each attention layer in the Transformer encoder. intermediate_size (`int`, *optional*, defaults to 3072): Dimensionality of the "intermediate" (i.e., feed-forward) layer in the Transformer encoder. hidden_act (`str` or `function`, *optional*, defaults to `"gelu"`): The non-linear activation function (function or string) in the encoder and pooler. If string, `"gelu"`, `"relu"`, `"silu"` and `"gelu_new"` are supported. hidden_dropout_prob (`float`, *optional*, defaults to 0.1): The dropout probability for all fully connected layers in the embeddings, encoder, and pooler. attention_probs_dropout_prob (`float`, *optional*, defaults to 0.1): The dropout ratio for the attention probabilities. max_position_embeddings (`int`, *optional*, defaults to 512): The maximum sequence length that this model might ever be used with. Typically set this to something large just in case (e.g., 512 or 1024 or 2048). type_vocab_size (`int`, *optional*, defaults to 2): The vocabulary size of the `token_type_ids` passed into [`LayoutLMModel`]. initializer_range (`float`, *optional*, defaults to 0.02): The standard deviation of the truncated_normal_initializer for initializing all weight matrices. layer_norm_eps (`float`, *optional*, defaults to 1e-12): The epsilon used by the layer normalization layers. pad_token_id (`int`, *optional*, defaults to 0): The value used to pad input_ids. position_embedding_type (`str`, *optional*, defaults to `"absolute"`): Type of position embedding. Choose one of `"absolute"`, `"relative_key"`, `"relative_key_query"`. For positional embeddings use `"absolute"`. For more information on `"relative_key"`, please refer to [Self-Attention with Relative Position Representations (Shaw et al.)](https://arxiv.org/abs/1803.02155). For more information on `"relative_key_query"`, please refer to *Method 4* in [Improve Transformer Models with Better Relative Position Embeddings (Huang et al.)](https://arxiv.org/abs/2009.13658). use_cache (`bool`, *optional*, defaults to `True`): Whether or not the model should return the last key/values attentions (not used by all models). Only relevant if `config.is_decoder=True`. max_2d_position_embeddings (`int`, *optional*, defaults to 1024): The maximum value that the 2D position embedding might ever used. Typically set this to something large just in case (e.g., 1024). Examples: ```python >>> from transformers import LayoutLMConfig, LayoutLMModel >>> # Initializing a LayoutLM configuration >>> configuration = LayoutLMConfig() >>> # Initializing a model (with random weights) from the configuration >>> model = LayoutLMModel(configuration) >>> # Accessing the model configuration >>> configuration = model.config ```""" model_type = "layoutlm" def __init__( self, vocab_size=30522, hidden_size=768, num_hidden_layers=12, num_attention_heads=12, intermediate_size=3072, hidden_act="gelu", hidden_dropout_prob=0.1, attention_probs_dropout_prob=0.1, max_position_embeddings=512, type_vocab_size=2, initializer_range=0.02, layer_norm_eps=1e-12, pad_token_id=0, position_embedding_type="absolute", use_cache=True, max_2d_position_embeddings=1024, **kwargs, ): super().__init__(pad_token_id=pad_token_id, **kwargs) self.vocab_size = vocab_size self.hidden_size = hidden_size self.num_hidden_layers = num_hidden_layers self.num_attention_heads = num_attention_heads self.hidden_act = hidden_act self.intermediate_size = intermediate_size self.hidden_dropout_prob = hidden_dropout_prob self.attention_probs_dropout_prob = attention_probs_dropout_prob self.max_position_embeddings = max_position_embeddings self.type_vocab_size = type_vocab_size self.initializer_range = initializer_range self.layer_norm_eps = layer_norm_eps self.position_embedding_type = position_embedding_type self.use_cache = use_cache self.max_2d_position_embeddings = max_2d_position_embeddings class LayoutLMOnnxConfig(OnnxConfig): def __init__( self, config: PretrainedConfig, task: str = "default", patching_specs: List[PatchingSpec] = None, ): super().__init__(config, task=task, patching_specs=patching_specs) self.max_2d_positions = config.max_2d_position_embeddings - 1 @property def inputs(self) -> Mapping[str, Mapping[int, str]]: return OrderedDict( [ ("input_ids", {0: "batch", 1: "sequence"}), ("bbox", {0: "batch", 1: "sequence"}), ("attention_mask", {0: "batch", 1: "sequence"}), ("token_type_ids", {0: "batch", 1: "sequence"}), ] ) def generate_dummy_inputs( self, tokenizer: PreTrainedTokenizer, batch_size: int = -1, seq_length: int = -1, is_pair: bool = False, framework: Optional[TensorType] = None, ) -> Mapping[str, Any]: """ Generate inputs to provide to the ONNX exporter for the specific framework Args: tokenizer: The tokenizer associated with this model configuration batch_size: The batch size (int) to export the model for (-1 means dynamic axis) seq_length: The sequence length (int) to export the model for (-1 means dynamic axis) is_pair: Indicate if the input is a pair (sentence 1, sentence 2) framework: The framework (optional) the tokenizer will generate tensor for Returns: Mapping[str, Tensor] holding the kwargs to provide to the model's forward function """ input_dict = super().generate_dummy_inputs( tokenizer, batch_size=batch_size, seq_length=seq_length, is_pair=is_pair, framework=framework ) # Generate a dummy bbox box = [48, 84, 73, 128] if not framework == TensorType.PYTORCH: raise NotImplementedError("Exporting LayoutLM to ONNX is currently only supported for PyTorch.") if not is_torch_available(): raise ValueError("Cannot generate dummy inputs without PyTorch installed.") import torch batch_size, seq_length = input_dict["input_ids"].shape input_dict["bbox"] = torch.tensor([*[box] * seq_length]).tile(batch_size, 1, 1) return input_dict

transformers/src/transformers/models/layoutlm/configuration_layoutlm.py/0

{ "file_path": "transformers/src/transformers/models/layoutlm/configuration_layoutlm.py", "repo_id": "transformers", "token_count": 3609 }

97

# coding=utf-8 # Copyright 2022 The HuggingFace Inc. team. All rights reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. """Image processor class for LayoutLMv3.""" from typing import Dict, Iterable, Optional, Union import numpy as np from ...image_processing_utils import BaseImageProcessor, BatchFeature, get_size_dict from ...image_transforms import resize, to_channel_dimension_format, to_pil_image from ...image_utils import ( IMAGENET_STANDARD_MEAN, IMAGENET_STANDARD_STD, ChannelDimension, ImageInput, PILImageResampling, infer_channel_dimension_format, is_scaled_image, make_list_of_images, to_numpy_array, valid_images, validate_kwargs, validate_preprocess_arguments, ) from ...utils import TensorType, is_pytesseract_available, is_vision_available, logging, requires_backends if is_vision_available(): import PIL # soft dependency if is_pytesseract_available(): import pytesseract logger = logging.get_logger(__name__) def normalize_box(box, width, height): return [ int(1000 * (box[0] / width)), int(1000 * (box[1] / height)), int(1000 * (box[2] / width)), int(1000 * (box[3] / height)), ] def apply_tesseract( image: np.ndarray, lang: Optional[str], tesseract_config: Optional[str], input_data_format: Optional[Union[ChannelDimension, str]] = None, ): """Applies Tesseract OCR on a document image, and returns recognized words + normalized bounding boxes.""" # apply OCR pil_image = to_pil_image(image, input_data_format=input_data_format) image_width, image_height = pil_image.size data = pytesseract.image_to_data(pil_image, lang=lang, output_type="dict", config=tesseract_config) words, left, top, width, height = data["text"], data["left"], data["top"], data["width"], data["height"] # filter empty words and corresponding coordinates irrelevant_indices = [idx for idx, word in enumerate(words) if not word.strip()] words = [word for idx, word in enumerate(words) if idx not in irrelevant_indices] left = [coord for idx, coord in enumerate(left) if idx not in irrelevant_indices] top = [coord for idx, coord in enumerate(top) if idx not in irrelevant_indices] width = [coord for idx, coord in enumerate(width) if idx not in irrelevant_indices] height = [coord for idx, coord in enumerate(height) if idx not in irrelevant_indices] # turn coordinates into (left, top, left+width, top+height) format actual_boxes = [] for x, y, w, h in zip(left, top, width, height): actual_box = [x, y, x + w, y + h] actual_boxes.append(actual_box) # finally, normalize the bounding boxes normalized_boxes = [] for box in actual_boxes: normalized_boxes.append(normalize_box(box, image_width, image_height)) assert len(words) == len(normalized_boxes), "Not as many words as there are bounding boxes" return words, normalized_boxes class LayoutLMv3ImageProcessor(BaseImageProcessor): r""" Constructs a LayoutLMv3 image processor. Args: do_resize (`bool`, *optional*, defaults to `True`): Whether to resize the image's (height, width) dimensions to `(size["height"], size["width"])`. Can be overridden by `do_resize` in `preprocess`. size (`Dict[str, int]` *optional*, defaults to `{"height": 224, "width": 224}`): Size of the image after resizing. Can be overridden by `size` in `preprocess`. resample (`PILImageResampling`, *optional*, defaults to `PILImageResampling.BILINEAR`): Resampling filter to use if resizing the image. Can be overridden by `resample` in `preprocess`. do_rescale (`bool`, *optional*, defaults to `True`): Whether to rescale the image's pixel values by the specified `rescale_value`. Can be overridden by `do_rescale` in `preprocess`. rescale_factor (`float`, *optional*, defaults to 1 / 255): Value by which the image's pixel values are rescaled. Can be overridden by `rescale_factor` in `preprocess`. do_normalize (`bool`, *optional*, defaults to `True`): Whether to normalize the image. Can be overridden by the `do_normalize` parameter in the `preprocess` method. image_mean (`Iterable[float]` or `float`, *optional*, defaults to `IMAGENET_STANDARD_MEAN`): Mean to use if normalizing the image. This is a float or list of floats the length of the number of channels in the image. Can be overridden by the `image_mean` parameter in the `preprocess` method. image_std (`Iterable[float]` or `float`, *optional*, defaults to `IMAGENET_STANDARD_STD`): Standard deviation to use if normalizing the image. This is a float or list of floats the length of the number of channels in the image. Can be overridden by the `image_std` parameter in the `preprocess` method. apply_ocr (`bool`, *optional*, defaults to `True`): Whether to apply the Tesseract OCR engine to get words + normalized bounding boxes. Can be overridden by the `apply_ocr` parameter in the `preprocess` method. ocr_lang (`str`, *optional*): The language, specified by its ISO code, to be used by the Tesseract OCR engine. By default, English is used. Can be overridden by the `ocr_lang` parameter in the `preprocess` method. tesseract_config (`str`, *optional*): Any additional custom configuration flags that are forwarded to the `config` parameter when calling Tesseract. For example: '--psm 6'. Can be overridden by the `tesseract_config` parameter in the `preprocess` method. """ model_input_names = ["pixel_values"] def __init__( self, do_resize: bool = True, size: Dict[str, int] = None, resample: PILImageResampling = PILImageResampling.BILINEAR, do_rescale: bool = True, rescale_value: float = 1 / 255, do_normalize: bool = True, image_mean: Union[float, Iterable[float]] = None, image_std: Union[float, Iterable[float]] = None, apply_ocr: bool = True, ocr_lang: Optional[str] = None, tesseract_config: Optional[str] = "", **kwargs, ) -> None: super().__init__(**kwargs) size = size if size is not None else {"height": 224, "width": 224} size = get_size_dict(size) self.do_resize = do_resize self.size = size self.resample = resample self.do_rescale = do_rescale self.rescale_factor = rescale_value self.do_normalize = do_normalize self.image_mean = image_mean if image_mean is not None else IMAGENET_STANDARD_MEAN self.image_std = image_std if image_std is not None else IMAGENET_STANDARD_STD self.apply_ocr = apply_ocr self.ocr_lang = ocr_lang self.tesseract_config = tesseract_config self._valid_processor_keys = [ "images", "do_resize", "size", "resample", "do_rescale", "rescale_factor", "do_normalize", "image_mean", "image_std", "apply_ocr", "ocr_lang", "tesseract_config", "return_tensors", "data_format", "input_data_format", ] # Copied from transformers.models.vit.image_processing_vit.ViTImageProcessor.resize def resize( self, image: np.ndarray, size: Dict[str, int], resample: PILImageResampling = PILImageResampling.BILINEAR, data_format: Optional[Union[str, ChannelDimension]] = None, input_data_format: Optional[Union[str, ChannelDimension]] = None, **kwargs, ) -> np.ndarray: """ Resize an image to `(size["height"], size["width"])`. Args: image (`np.ndarray`): Image to resize. size (`Dict[str, int]`): Dictionary in the format `{"height": int, "width": int}` specifying the size of the output image. resample (`PILImageResampling`, *optional*, defaults to `PILImageResampling.BILINEAR`): `PILImageResampling` filter to use when resizing the image e.g. `PILImageResampling.BILINEAR`. data_format (`ChannelDimension` or `str`, *optional*): The channel dimension format for the output image. If unset, the channel dimension format of the input image is used. Can be one of: - `"channels_first"` or `ChannelDimension.FIRST`: image in (num_channels, height, width) format. - `"channels_last"` or `ChannelDimension.LAST`: image in (height, width, num_channels) format. - `"none"` or `ChannelDimension.NONE`: image in (height, width) format. input_data_format (`ChannelDimension` or `str`, *optional*): The channel dimension format for the input image. If unset, the channel dimension format is inferred from the input image. Can be one of: - `"channels_first"` or `ChannelDimension.FIRST`: image in (num_channels, height, width) format. - `"channels_last"` or `ChannelDimension.LAST`: image in (height, width, num_channels) format. - `"none"` or `ChannelDimension.NONE`: image in (height, width) format. Returns: `np.ndarray`: The resized image. """ size = get_size_dict(size) if "height" not in size or "width" not in size: raise ValueError(f"The `size` dictionary must contain the keys `height` and `width`. Got {size.keys()}") output_size = (size["height"], size["width"]) return resize( image, size=output_size, resample=resample, data_format=data_format, input_data_format=input_data_format, **kwargs, ) def preprocess( self, images: ImageInput, do_resize: bool = None, size: Dict[str, int] = None, resample=None, do_rescale: bool = None, rescale_factor: float = None, do_normalize: bool = None, image_mean: Union[float, Iterable[float]] = None, image_std: Union[float, Iterable[float]] = None, apply_ocr: bool = None, ocr_lang: Optional[str] = None, tesseract_config: Optional[str] = None, return_tensors: Optional[Union[str, TensorType]] = None, data_format: ChannelDimension = ChannelDimension.FIRST, input_data_format: Optional[Union[str, ChannelDimension]] = None, **kwargs, ) -> PIL.Image.Image: """ Preprocess an image or batch of images. Args: images (`ImageInput`): Image to preprocess. Expects a single or batch of images with pixel values ranging from 0 to 255. If passing in images with pixel values between 0 and 1, set `do_rescale=False`. do_resize (`bool`, *optional*, defaults to `self.do_resize`): Whether to resize the image. size (`Dict[str, int]`, *optional*, defaults to `self.size`): Desired size of the output image after applying `resize`. resample (`int`, *optional*, defaults to `self.resample`): Resampling filter to use if resizing the image. This can be one of the `PILImageResampling` filters. Only has an effect if `do_resize` is set to `True`. do_rescale (`bool`, *optional*, defaults to `self.do_rescale`): Whether to rescale the image pixel values between [0, 1]. rescale_factor (`float`, *optional*, defaults to `self.rescale_factor`): Rescale factor to apply to the image pixel values. Only has an effect if `do_rescale` is set to `True`. do_normalize (`bool`, *optional*, defaults to `self.do_normalize`): Whether to normalize the image. image_mean (`float` or `Iterable[float]`, *optional*, defaults to `self.image_mean`): Mean values to be used for normalization. Only has an effect if `do_normalize` is set to `True`. image_std (`float` or `Iterable[float]`, *optional*, defaults to `self.image_std`): Standard deviation values to be used for normalization. Only has an effect if `do_normalize` is set to `True`. apply_ocr (`bool`, *optional*, defaults to `self.apply_ocr`): Whether to apply the Tesseract OCR engine to get words + normalized bounding boxes. ocr_lang (`str`, *optional*, defaults to `self.ocr_lang`): The language, specified by its ISO code, to be used by the Tesseract OCR engine. By default, English is used. tesseract_config (`str`, *optional*, defaults to `self.tesseract_config`): Any additional custom configuration flags that are forwarded to the `config` parameter when calling Tesseract. return_tensors (`str` or `TensorType`, *optional*): The type of tensors to return. Can be one of: - Unset: Return a list of `np.ndarray`. - `TensorType.TENSORFLOW` or `'tf'`: Return a batch of type `tf.Tensor`. - `TensorType.PYTORCH` or `'pt'`: Return a batch of type `torch.Tensor`. - `TensorType.NUMPY` or `'np'`: Return a batch of type `np.ndarray`. - `TensorType.JAX` or `'jax'`: Return a batch of type `jax.numpy.ndarray`. data_format (`ChannelDimension` or `str`, *optional*, defaults to `ChannelDimension.FIRST`): The channel dimension format for the output image. Can be one of: - `ChannelDimension.FIRST`: image in (num_channels, height, width) format. - `ChannelDimension.LAST`: image in (height, width, num_channels) format. input_data_format (`ChannelDimension` or `str`, *optional*): The channel dimension format for the input image. If unset, the channel dimension format is inferred from the input image. Can be one of: - `"channels_first"` or `ChannelDimension.FIRST`: image in (num_channels, height, width) format. - `"channels_last"` or `ChannelDimension.LAST`: image in (height, width, num_channels) format. - `"none"` or `ChannelDimension.NONE`: image in (height, width) format. """ do_resize = do_resize if do_resize is not None else self.do_resize size = size if size is not None else self.size size = get_size_dict(size) resample = resample if resample is not None else self.resample do_rescale = do_rescale if do_rescale is not None else self.do_rescale rescale_factor = rescale_factor if rescale_factor is not None else self.rescale_factor do_normalize = do_normalize if do_normalize is not None else self.do_normalize image_mean = image_mean if image_mean is not None else self.image_mean image_std = image_std if image_std is not None else self.image_std apply_ocr = apply_ocr if apply_ocr is not None else self.apply_ocr ocr_lang = ocr_lang if ocr_lang is not None else self.ocr_lang tesseract_config = tesseract_config if tesseract_config is not None else self.tesseract_config images = make_list_of_images(images) validate_kwargs(captured_kwargs=kwargs.keys(), valid_processor_keys=self._valid_processor_keys) if not valid_images(images): raise ValueError( "Invalid image type. Must be of type PIL.Image.Image, numpy.ndarray, " "torch.Tensor, tf.Tensor or jax.ndarray." ) validate_preprocess_arguments( do_rescale=do_rescale, rescale_factor=rescale_factor, do_normalize=do_normalize, image_mean=image_mean, image_std=image_std, do_resize=do_resize, size=size, resample=resample, ) # All transformations expect numpy arrays. images = [to_numpy_array(image) for image in images] if is_scaled_image(images[0]) and do_rescale: logger.warning_once( "It looks like you are trying to rescale already rescaled images. If the input" " images have pixel values between 0 and 1, set `do_rescale=False` to avoid rescaling them again." ) if input_data_format is None: # We assume that all images have the same channel dimension format. input_data_format = infer_channel_dimension_format(images[0]) # Tesseract OCR to get words + normalized bounding boxes if apply_ocr: requires_backends(self, "pytesseract") words_batch = [] boxes_batch = [] for image in images: words, boxes = apply_tesseract(image, ocr_lang, tesseract_config, input_data_format=input_data_format) words_batch.append(words) boxes_batch.append(boxes) if do_resize: images = [ self.resize(image=image, size=size, resample=resample, input_data_format=input_data_format) for image in images ] if do_rescale: images = [ self.rescale(image=image, scale=rescale_factor, input_data_format=input_data_format) for image in images ] if do_normalize: images = [ self.normalize(image=image, mean=image_mean, std=image_std, input_data_format=input_data_format) for image in images ] images = [ to_channel_dimension_format(image, data_format, input_channel_dim=input_data_format) for image in images ] data = BatchFeature(data={"pixel_values": images}, tensor_type=return_tensors) if apply_ocr: data["words"] = words_batch data["boxes"] = boxes_batch return data

transformers/src/transformers/models/layoutlmv3/image_processing_layoutlmv3.py/0

{ "file_path": "transformers/src/transformers/models/layoutlmv3/image_processing_layoutlmv3.py", "repo_id": "transformers", "token_count": 7927 }

98

# coding=utf-8 # Copyright 2022 Google LLC., LongT5 Authors and HuggingFace Inc. team. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. """ PyTorch LongT5 model.""" import copy import math import warnings from typing import Any, List, Optional, Tuple, Union import torch from torch import nn from torch.nn import CrossEntropyLoss from ...activations import ACT2FN from ...modeling_outputs import ( BaseModelOutput, BaseModelOutputWithPastAndCrossAttentions, Seq2SeqLMOutput, Seq2SeqModelOutput, ) from ...modeling_utils import PreTrainedModel from ...pytorch_utils import ALL_LAYERNORM_LAYERS, find_pruneable_heads_and_indices, prune_linear_layer from ...utils import ( DUMMY_INPUTS, DUMMY_MASK, add_start_docstrings, add_start_docstrings_to_model_forward, is_torch_fx_proxy, logging, replace_return_docstrings, ) from .configuration_longt5 import LongT5Config logger = logging.get_logger(__name__) _CONFIG_FOR_DOC = "LongT5Config" _CHECKPOINT_FOR_DOC = "google/long-t5-local-base" # TODO: Update before the merge LONGT5_PRETRAINED_MODEL_ARCHIVE_LIST = [ "google/long-t5-local-base", "google/long-t5-local-large", "google/long-t5-tglobal-base", "google/long-t5-tglobal-large", ] def _pad_to_multiple(x: torch.Tensor, block_len: int, dim: int, pad_value: int = 0) -> torch.Tensor: """Pad a tensor so that a sequence length will be a multiple of `block_len`""" pad_len = -x.shape[dim] % block_len # Handle cases when an empty input sequence is given if not all(x.shape): new_shape = list(x.shape) new_shape[dim] += pad_len return torch.zeros(new_shape, dtype=x.dtype) pad = [(0, 0)] * x.ndim pad[dim] = (0, pad_len) pad = sum(pad[::-1], ()) x = nn.functional.pad(x, pad=pad, mode="constant", value=pad_value) return x def _split_into_blocks(x: torch.Tensor, block_len: int, dim: int) -> torch.Tensor: """Split an input tensor into blocks of a given `block_len` along the given `dim`. If the dimension length is not a multiple of `block_len`, it will be padded first with selected `pad_value`. """ # pad tensor to multiple of block_len if x.shape[dim] % block_len != 0: x = _pad_to_multiple(x, block_len, dim, pad_value=0) num_blocks = x.shape[dim] // block_len output_shape = x.shape[:dim] + (num_blocks, block_len) + x.shape[(dim + 1) :] # If 0 is in output_shape, we cannot apply reshape because of incompatibility with ONNX conversion if 0 in output_shape: return torch.empty(output_shape, dtype=x.dtype, device=x.device) return x.reshape(output_shape) def _concatenate_3_blocks(x: torch.Tensor, block_dim: int, sequence_dim: int, pad_value: int = 0) -> torch.Tensor: """Concatenate three consecutive blocks for each input block for local attentiont. For more information, see: https://arxiv.org/pdf/2112.07916.pdf. """ num_blocks = x.shape[block_dim] pad = [(0, 0)] * x.ndim pad[block_dim] = (1, 1) pad = sum(pad[::-1], ()) # [batch_size, num_blocks, block_len] -> [batch_size, num_blocks + 2, block_len] x = nn.functional.pad(x, pad=pad, mode="constant", value=pad_value) blocks_list: List[torch.Tensor] = [] for i in range(3): # We use indexing approach here: # https://numpy.org/doc/stable/user/basics.indexing.html#dealing-with-variable-numbers-of-indices-within-programs indices = [slice(0, None)] * x.ndim indices[block_dim] = slice(i, i + num_blocks) indices = tuple(indices) blocks_list.append(x[indices]) # [batch_size, num_blocks, 3 * block_len, ...] return torch.cat(blocks_list, dim=sequence_dim) def _make_3block_relative_position_ids(block_len: int) -> torch.Tensor: """Makes 3-blocked relative position ids for local attention.""" position_ids = torch.arange(3 * block_len, dtype=torch.int32) center_position_ids = position_ids[block_len:-block_len] # [block_len, 3 * block_len] relative_position_ids = position_ids.unsqueeze(0) - center_position_ids.unsqueeze(1) return relative_position_ids def _mask_local_attention_mask(local_attention_mask: torch.Tensor, block_len: int) -> torch.Tensor: """Mask local attention mask to enforce that tokens are not allowed to attend tokens farther than ``local_radius.""" relative_position_ids = _make_3block_relative_position_ids(block_len) locality_mask = torch.abs(relative_position_ids) < block_len locality_mask = locality_mask[None, None, :, :] locality_mask = locality_mask.to(local_attention_mask.device) return torch.logical_and(local_attention_mask, locality_mask) def _get_local_attention_mask(attention_mask: torch.Tensor, block_len: int, device: torch.device) -> torch.Tensor: """Prepare attention mask to be applied for a local attention.""" # [batch_size, num_blocks, block_len] _blocked_attention_mask = _split_into_blocks(attention_mask, block_len, dim=1) # [batch_size, num_block, 3 * block_len] _3blocked_attention_mask = _concatenate_3_blocks(_blocked_attention_mask, block_dim=1, sequence_dim=2) _blocked_attention_mask = _blocked_attention_mask.unsqueeze(-1) _3blocked_attention_mask = _3blocked_attention_mask.unsqueeze(-2) # [batch_size, num_block, block_len, 3 * block_len] local_attention_mask = torch.logical_and(_blocked_attention_mask, _3blocked_attention_mask) local_attention_mask = _mask_local_attention_mask(local_attention_mask, block_len) # [batch_size, 1, num_block, block_len, 3 * block_len] return local_attention_mask.unsqueeze(1).to(device) def _make_global_fixed_block_ids( attention_mask: torch.Tensor, global_block_size: int ) -> Tuple[torch.Tensor, torch.Tensor]: """Obtain the "fixed block" global id corresponding to each input token. This implementation is a simlified version of the original Flaxformr implementation adopted from: https://github.com/google/flaxformer/blob/main/flaxformer/architectures/longt5/long_attention.py. In our scenario, as we use this strategy only for a decoder, orphan tokens, i.e. those tokens which do not make for the whole fixed block, are assigned to the preceding block. Padding tokens from the original sequence are represented by -1. """ batch_size, seq_len = attention_mask.shape[:2] def handle_orphan_tokens(block_ids: torch.Tensor) -> torch.Tensor: block_ends = (torch.arange(seq_len) % global_block_size) == global_block_size - 1 block_ends = block_ends.to(block_ids.device) true_block_ends = torch.logical_and(block_ends, block_ids >= 0) full_blocks = true_block_ends.sum(-1).unsqueeze(-1).type(block_ids.dtype) - 1 block_ids = torch.where(block_ids < full_blocks, block_ids, full_blocks) return block_ids fixed_block_mask = torch.ones_like(attention_mask, device=attention_mask.device) / global_block_size fixed_block_mask = torch.cumsum(fixed_block_mask, axis=1) - fixed_block_mask mask = torch.where(attention_mask != 0.0, 1.0, -1000.0).type(attention_mask.dtype) global_block_ids = torch.floor(mask + fixed_block_mask - 1.0).type(attention_mask.dtype) _global_block_ids_lower_bound = torch.tensor(-1, dtype=global_block_ids.dtype, device=global_block_ids.device) global_block_ids = torch.where( global_block_ids > _global_block_ids_lower_bound, global_block_ids, _global_block_ids_lower_bound ) # set padding tokens to -1 global_block_ids = (global_block_ids * attention_mask) + (attention_mask - 1) # [batch_size, seq_len] global_block_ids = handle_orphan_tokens(global_block_ids) num_globals = seq_len // global_block_size # [batch_size, seq_len // global_block_size] if num_globals > 0: _sequence_block_ids_max = torch.max(global_block_ids, dim=-1).values.repeat(num_globals, 1).transpose(0, 1) else: _sequence_block_ids_max = torch.zeros( batch_size, 0, dtype=global_block_ids.dtype, device=global_block_ids.device ) global_segment_ids = torch.cumsum(torch.ones(batch_size, num_globals), dim=-1) - 1 global_segment_ids = global_segment_ids.to(attention_mask.device) global_segment_ids = torch.where(global_segment_ids <= _sequence_block_ids_max, 1, 0) return global_block_ids.type(torch.int), global_segment_ids.type(torch.int) def _make_side_relative_position_ids(attention_mask: torch.Tensor, global_block_size: int) -> torch.Tensor: """Create the relative position tensor for local -> global attention.""" block_ids, global_segment_ids = _make_global_fixed_block_ids(attention_mask, global_block_size) global_seq_len = global_segment_ids.shape[-1] global_positions = torch.arange(global_seq_len, device=block_ids.device) side_relative_position = global_positions - block_ids[..., None] return side_relative_position.type(torch.int64) def _create_global_aggregates( hidden_states: torch.Tensor, block_ids: torch.Tensor, global_seq_len: int ) -> torch.Tensor: """Compute individual block aggregates by summing over individual blocks.""" # (batch..., seq_len, global_seq_len)) block_ids = block_ids.where( block_ids >= 0, torch.tensor(global_seq_len, dtype=block_ids.dtype, device=block_ids.device) ) one_hot_block_ids = nn.functional.one_hot(block_ids.type(torch.int64), global_seq_len + 1)[:, :, :-1] return torch.einsum("...nd,...ng->...gd", hidden_states, one_hot_block_ids.type(hidden_states.dtype)) # Copied from transformers.models.t5.modeling_t5.T5LayerNorm with T5->LongT5 class LongT5LayerNorm(nn.Module): def __init__(self, hidden_size, eps=1e-6): """ Construct a layernorm module in the LongT5 style. No bias and no subtraction of mean. """ super().__init__() self.weight = nn.Parameter(torch.ones(hidden_size)) self.variance_epsilon = eps def forward(self, hidden_states): # LongT5 uses a layer_norm which only scales and doesn't shift, which is also known as Root Mean # Square Layer Normalization https://arxiv.org/abs/1910.07467 thus varience is calculated # w/o mean and there is no bias. Additionally we want to make sure that the accumulation for # half-precision inputs is done in fp32 variance = hidden_states.to(torch.float32).pow(2).mean(-1, keepdim=True) hidden_states = hidden_states * torch.rsqrt(variance + self.variance_epsilon) # convert into half-precision if necessary if self.weight.dtype in [torch.float16, torch.bfloat16]: hidden_states = hidden_states.to(self.weight.dtype) return self.weight * hidden_states try: from apex.normalization import FusedRMSNorm LongT5LayerNorm = FusedRMSNorm # noqa logger.info("Discovered apex.normalization.FusedRMSNorm - will use it instead of LongT5LayerNorm") except ImportError: # using the normal LongT5LayerNorm pass except Exception: logger.warning("discovered apex but it failed to load, falling back to LongT5LayerNorm") pass ALL_LAYERNORM_LAYERS.append(LongT5LayerNorm) # Copied from transformers.models.t5.modeling_t5.T5DenseActDense with T5->LongT5 class LongT5DenseActDense(nn.Module): def __init__(self, config: LongT5Config): super().__init__() self.wi = nn.Linear(config.d_model, config.d_ff, bias=False) self.wo = nn.Linear(config.d_ff, config.d_model, bias=False) self.dropout = nn.Dropout(config.dropout_rate) self.act = ACT2FN[config.dense_act_fn] def forward(self, hidden_states): hidden_states = self.wi(hidden_states) hidden_states = self.act(hidden_states) hidden_states = self.dropout(hidden_states) if ( isinstance(self.wo.weight, torch.Tensor) and hidden_states.dtype != self.wo.weight.dtype and self.wo.weight.dtype != torch.int8 ): hidden_states = hidden_states.to(self.wo.weight.dtype) hidden_states = self.wo(hidden_states) return hidden_states class LongT5DenseGatedActDense(nn.Module): def __init__(self, config: LongT5Config): super().__init__() self.wi_0 = nn.Linear(config.d_model, config.d_ff, bias=False) self.wi_1 = nn.Linear(config.d_model, config.d_ff, bias=False) self.wo = nn.Linear(config.d_ff, config.d_model, bias=False) self.dropout = nn.Dropout(config.dropout_rate) self.act = ACT2FN[config.dense_act_fn] def forward(self, hidden_states): hidden_gelu = self.act(self.wi_0(hidden_states)) hidden_linear = self.wi_1(hidden_states) hidden_states = hidden_gelu * hidden_linear hidden_states = self.dropout(hidden_states) hidden_states = self.wo(hidden_states) return hidden_states # Copied from transformers.models.t5.modeling_t5.T5LayerFF with T5->LongT5 class LongT5LayerFF(nn.Module): def __init__(self, config: LongT5Config): super().__init__() if config.is_gated_act: self.DenseReluDense = LongT5DenseGatedActDense(config) else: self.DenseReluDense = LongT5DenseActDense(config) self.layer_norm = LongT5LayerNorm(config.d_model, eps=config.layer_norm_epsilon) self.dropout = nn.Dropout(config.dropout_rate) def forward(self, hidden_states): forwarded_states = self.layer_norm(hidden_states) forwarded_states = self.DenseReluDense(forwarded_states) hidden_states = hidden_states + self.dropout(forwarded_states) return hidden_states # Copied from transformers.models.t5.modeling_t5.T5Attention with T5->LongT5 class LongT5Attention(nn.Module): def __init__(self, config: LongT5Config, has_relative_attention_bias=False): super().__init__() self.is_decoder = config.is_decoder self.has_relative_attention_bias = has_relative_attention_bias self.relative_attention_num_buckets = config.relative_attention_num_buckets self.relative_attention_max_distance = config.relative_attention_max_distance self.d_model = config.d_model self.key_value_proj_dim = config.d_kv self.n_heads = config.num_heads self.dropout = config.dropout_rate self.inner_dim = self.n_heads * self.key_value_proj_dim # Mesh TensorFlow initialization to avoid scaling before softmax self.q = nn.Linear(self.d_model, self.inner_dim, bias=False) self.k = nn.Linear(self.d_model, self.inner_dim, bias=False) self.v = nn.Linear(self.d_model, self.inner_dim, bias=False) self.o = nn.Linear(self.inner_dim, self.d_model, bias=False) if self.has_relative_attention_bias: self.relative_attention_bias = nn.Embedding(self.relative_attention_num_buckets, self.n_heads) self.pruned_heads = set() self.gradient_checkpointing = False def prune_heads(self, heads): if len(heads) == 0: return heads, index = find_pruneable_heads_and_indices( heads, self.n_heads, self.key_value_proj_dim, self.pruned_heads ) # Prune linear layers self.q = prune_linear_layer(self.q, index) self.k = prune_linear_layer(self.k, index) self.v = prune_linear_layer(self.v, index) self.o = prune_linear_layer(self.o, index, dim=1) # Update hyper params self.n_heads = self.n_heads - len(heads) self.inner_dim = self.key_value_proj_dim * self.n_heads self.pruned_heads = self.pruned_heads.union(heads) @staticmethod def _relative_position_bucket(relative_position, bidirectional=True, num_buckets=32, max_distance=128): """ Adapted from Mesh Tensorflow: https://github.com/tensorflow/mesh/blob/0cb87fe07da627bf0b7e60475d59f95ed6b5be3d/mesh_tensorflow/transformer/transformer_layers.py#L593 Translate relative position to a bucket number for relative attention. The relative position is defined as memory_position - query_position, i.e. the distance in tokens from the attending position to the attended-to position. If bidirectional=False, then positive relative positions are invalid. We use smaller buckets for small absolute relative_position and larger buckets for larger absolute relative_positions. All relative positions >=max_distance map to the same bucket. All relative positions <=-max_distance map to the same bucket. This should allow for more graceful generalization to longer sequences than the model has been trained on Args: relative_position: an int32 Tensor bidirectional: a boolean - whether the attention is bidirectional num_buckets: an integer max_distance: an integer Returns: a Tensor with the same shape as relative_position, containing int32 values in the range [0, num_buckets) """ relative_buckets = 0 if bidirectional: num_buckets //= 2 relative_buckets += (relative_position > 0).to(torch.long) * num_buckets relative_position = torch.abs(relative_position) else: relative_position = -torch.min(relative_position, torch.zeros_like(relative_position)) # now relative_position is in the range [0, inf) # half of the buckets are for exact increments in positions max_exact = num_buckets // 2 is_small = relative_position < max_exact # The other half of the buckets are for logarithmically bigger bins in positions up to max_distance relative_position_if_large = max_exact + ( torch.log(relative_position.float() / max_exact) / math.log(max_distance / max_exact) * (num_buckets - max_exact) ).to(torch.long) relative_position_if_large = torch.min( relative_position_if_large, torch.full_like(relative_position_if_large, num_buckets - 1) ) relative_buckets += torch.where(is_small, relative_position, relative_position_if_large) return relative_buckets def compute_bias(self, query_length, key_length, device=None): """Compute binned relative position bias""" if device is None: device = self.relative_attention_bias.weight.device context_position = torch.arange(query_length, dtype=torch.long, device=device)[:, None] memory_position = torch.arange(key_length, dtype=torch.long, device=device)[None, :] relative_position = memory_position - context_position # shape (query_length, key_length) relative_position_bucket = self._relative_position_bucket( relative_position, # shape (query_length, key_length) bidirectional=(not self.is_decoder), num_buckets=self.relative_attention_num_buckets, max_distance=self.relative_attention_max_distance, ) values = self.relative_attention_bias(relative_position_bucket) # shape (query_length, key_length, num_heads) values = values.permute([2, 0, 1]).unsqueeze(0) # shape (1, num_heads, query_length, key_length) return values def forward( self, hidden_states, mask=None, key_value_states=None, position_bias=None, past_key_value=None, layer_head_mask=None, query_length=None, use_cache=False, output_attentions=False, ): """ Self-attention (if key_value_states is None) or attention over source sentence (provided by key_value_states). """ # Input is (batch_size, seq_length, dim) # Mask is (batch_size, key_length) (non-causal) or (batch_size, key_length, key_length) # past_key_value[0] is (batch_size, n_heads, q_len - 1, dim_per_head) batch_size, seq_length = hidden_states.shape[:2] real_seq_length = seq_length if past_key_value is not None: if len(past_key_value) != 2: raise ValueError( f"past_key_value should have 2 past states: keys and values. Got { len(past_key_value)} past states" ) real_seq_length += past_key_value[0].shape[2] if query_length is None else query_length key_length = real_seq_length if key_value_states is None else key_value_states.shape[1] def shape(states): """projection""" return states.view(batch_size, -1, self.n_heads, self.key_value_proj_dim).transpose(1, 2) def unshape(states): """reshape""" return states.transpose(1, 2).contiguous().view(batch_size, -1, self.inner_dim) def project(hidden_states, proj_layer, key_value_states, past_key_value): """projects hidden states correctly to key/query states""" if key_value_states is None: # self-attn # (batch_size, n_heads, seq_length, dim_per_head) hidden_states = shape(proj_layer(hidden_states)) elif past_key_value is None: # cross-attn # (batch_size, n_heads, seq_length, dim_per_head) hidden_states = shape(proj_layer(key_value_states)) if past_key_value is not None: if key_value_states is None: # self-attn # (batch_size, n_heads, key_length, dim_per_head) hidden_states = torch.cat([past_key_value, hidden_states], dim=2) elif past_key_value.shape[2] != key_value_states.shape[1]: # checking that the `sequence_length` of the `past_key_value` is the same as # the provided `key_value_states` to support prefix tuning # cross-attn # (batch_size, n_heads, seq_length, dim_per_head) hidden_states = shape(proj_layer(key_value_states)) else: # cross-attn hidden_states = past_key_value return hidden_states # get query states query_states = shape(self.q(hidden_states)) # (batch_size, n_heads, seq_length, dim_per_head) # get key/value states key_states = project( hidden_states, self.k, key_value_states, past_key_value[0] if past_key_value is not None else None ) value_states = project( hidden_states, self.v, key_value_states, past_key_value[1] if past_key_value is not None else None ) # compute scores scores = torch.matmul( query_states, key_states.transpose(3, 2) ) # equivalent of torch.einsum("bnqd,bnkd->bnqk", query_states, key_states), compatible with onnx op>9 if position_bias is None: if not self.has_relative_attention_bias: position_bias = torch.zeros( (1, self.n_heads, real_seq_length, key_length), device=scores.device, dtype=scores.dtype ) if self.gradient_checkpointing and self.training: position_bias.requires_grad = True else: position_bias = self.compute_bias(real_seq_length, key_length, device=scores.device) # if key and values are already calculated # we want only the last query position bias if past_key_value is not None: position_bias = position_bias[:, :, -hidden_states.size(1) :, :] if mask is not None: position_bias = position_bias + mask # (batch_size, n_heads, seq_length, key_length) if self.pruned_heads: mask = torch.ones(position_bias.shape[1]) mask[list(self.pruned_heads)] = 0 position_bias_masked = position_bias[:, mask.bool()] else: position_bias_masked = position_bias scores += position_bias_masked attn_weights = nn.functional.softmax(scores.float(), dim=-1).type_as( scores ) # (batch_size, n_heads, seq_length, key_length) attn_weights = nn.functional.dropout( attn_weights, p=self.dropout, training=self.training ) # (batch_size, n_heads, seq_length, key_length) # Mask heads if we want to if layer_head_mask is not None: attn_weights = attn_weights * layer_head_mask attn_output = unshape(torch.matmul(attn_weights, value_states)) # (batch_size, seq_length, dim) attn_output = self.o(attn_output) present_key_value_state = (key_states, value_states) if (self.is_decoder and use_cache) else None outputs = (attn_output,) + (present_key_value_state,) + (position_bias,) if output_attentions: outputs = outputs + (attn_weights,) return outputs class LongT5LocalAttention(nn.Module): def __init__(self, config: LongT5Config, has_relative_attention_bias: bool = False) -> None: super().__init__() self.is_decoder = config.is_decoder self.has_relative_attention_bias = has_relative_attention_bias self.relative_attention_num_buckets = config.relative_attention_num_buckets self.relative_attention_max_distance = config.relative_attention_max_distance self.d_model = config.d_model self.key_value_proj_dim = config.d_kv self.n_heads = config.num_heads self.local_radius = config.local_radius self.block_len = self.local_radius + 1 self.dropout = config.dropout_rate self.inner_dim = self.n_heads * self.key_value_proj_dim # Mesh TensorFlow initialization to avoid scaling before softmax self.q = nn.Linear(self.d_model, self.inner_dim, bias=False) self.k = nn.Linear(self.d_model, self.inner_dim, bias=False) self.v = nn.Linear(self.d_model, self.inner_dim, bias=False) self.o = nn.Linear(self.inner_dim, self.d_model, bias=False) if self.has_relative_attention_bias: self.relative_attention_bias = nn.Embedding(self.relative_attention_num_buckets, self.n_heads) self.pruned_heads = set() self.gradient_checkpointing = False # Copied from transformers.models.t5.modeling_t5.T5Attention.prune_heads def prune_heads(self, heads): if len(heads) == 0: return heads, index = find_pruneable_heads_and_indices( heads, self.n_heads, self.key_value_proj_dim, self.pruned_heads ) # Prune linear layers self.q = prune_linear_layer(self.q, index) self.k = prune_linear_layer(self.k, index) self.v = prune_linear_layer(self.v, index) self.o = prune_linear_layer(self.o, index, dim=1) # Update hyper params self.n_heads = self.n_heads - len(heads) self.inner_dim = self.key_value_proj_dim * self.n_heads self.pruned_heads = self.pruned_heads.union(heads) @staticmethod # Copied from transformers.models.t5.modeling_t5.T5Attention._relative_position_bucket def _relative_position_bucket(relative_position, bidirectional=True, num_buckets=32, max_distance=128): """ Adapted from Mesh Tensorflow: https://github.com/tensorflow/mesh/blob/0cb87fe07da627bf0b7e60475d59f95ed6b5be3d/mesh_tensorflow/transformer/transformer_layers.py#L593 Translate relative position to a bucket number for relative attention. The relative position is defined as memory_position - query_position, i.e. the distance in tokens from the attending position to the attended-to position. If bidirectional=False, then positive relative positions are invalid. We use smaller buckets for small absolute relative_position and larger buckets for larger absolute relative_positions. All relative positions >=max_distance map to the same bucket. All relative positions <=-max_distance map to the same bucket. This should allow for more graceful generalization to longer sequences than the model has been trained on Args: relative_position: an int32 Tensor bidirectional: a boolean - whether the attention is bidirectional num_buckets: an integer max_distance: an integer Returns: a Tensor with the same shape as relative_position, containing int32 values in the range [0, num_buckets) """ relative_buckets = 0 if bidirectional: num_buckets //= 2 relative_buckets += (relative_position > 0).to(torch.long) * num_buckets relative_position = torch.abs(relative_position) else: relative_position = -torch.min(relative_position, torch.zeros_like(relative_position)) # now relative_position is in the range [0, inf) # half of the buckets are for exact increments in positions max_exact = num_buckets // 2 is_small = relative_position < max_exact # The other half of the buckets are for logarithmically bigger bins in positions up to max_distance relative_position_if_large = max_exact + ( torch.log(relative_position.float() / max_exact) / math.log(max_distance / max_exact) * (num_buckets - max_exact) ).to(torch.long) relative_position_if_large = torch.min( relative_position_if_large, torch.full_like(relative_position_if_large, num_buckets - 1) ) relative_buckets += torch.where(is_small, relative_position, relative_position_if_large) return relative_buckets def compute_bias(self, block_length: int): """Compute binned relative position bias""" target_device = ( self.relative_attention_bias.weight.device if self.relative_attention_bias.weight.device.type != "meta" else None ) memory_position = torch.arange(3 * block_length, dtype=torch.long, device=target_device) context_position = memory_position[block_length:-block_length] # (block_length, 3 * block_length) relative_position = memory_position[None, :] - context_position[:, None] relative_position_bucket = self._relative_position_bucket( relative_position, # (block_length, 3 * block_length) bidirectional=(not self.is_decoder), num_buckets=self.relative_attention_num_buckets, max_distance=self.relative_attention_max_distance, ) # (block_length, 3 * block_length, num_heads) values = self.relative_attention_bias(relative_position_bucket) # (1, 1, num_heads, block_length, 3 * block_length) values = values.permute([2, 0, 1]).unsqueeze(0).unsqueeze(0) return values def forward( self, hidden_states, mask=None, position_bias=None, layer_head_mask=None, output_attentions=False, ): batch_size, seq_length = hidden_states.shape[:2] def shape(states): """projection""" return states.view(batch_size, -1, self.n_heads, self.key_value_proj_dim) def unshape(states): """reshape""" return states.contiguous().view(batch_size, -1, self.inner_dim) # get query/key/value states -> (batch_size, seq_length, n_heads, dim_per_head) query_states = shape(self.q(hidden_states)) key_states = shape(self.k(hidden_states)) value_states = shape(self.v(hidden_states)) # Split into blocks -> (batch_size, num_blocks, block_len, n_heads, dim_per_head) query_states = _split_into_blocks(query_states, self.block_len, dim=1) key_states = _split_into_blocks(key_states, self.block_len, dim=1) value_states = _split_into_blocks(value_states, self.block_len, dim=1) # Concatenate 3 blocks for keys and values -> (batch_size, num_blocks, 3 * block_len, n_heads, dim_per_head) key_states = _concatenate_3_blocks(key_states, block_dim=1, sequence_dim=2) value_states = _concatenate_3_blocks(value_states, block_dim=1, sequence_dim=2) # Compute scores scores = torch.einsum( "...qhd,...khd->...hqk", query_states, key_states ) # (batch_size, num_block, n_heads, block_len, 3 * block_len) if position_bias is None: # position_bias shape: # (1, 1, n_heads, block_len, 3 * block_len) if not self.has_relative_attention_bias: position_bias = torch.zeros( (1, 1, self.n_heads, self.block_len, 3 * self.block_len), device=scores.device, dtype=scores.dtype ) if self.gradient_checkpointing and self.training: position_bias.requires_grad = True else: position_bias = self.compute_bias(self.block_len) if mask is not None: # Replace masked positions with -1e10 (according to the original implementation) mask = torch.where(mask > 0, 0.0, -1e10) # We need to adjust position bias shape to be sum with mask position_bias = position_bias + mask.transpose(1, 2) scores += position_bias # (batch_size, num_blocks, n_heads, block_len, 3 * block_len) attn_weights = nn.functional.softmax(scores.float(), dim=-1).type_as(scores) # (batch_size, num_blocks, n_heads, block_len, 3 * block_len) attn_weights = nn.functional.dropout(attn_weights, p=self.dropout, training=self.training) # Mask heads if we want to if layer_head_mask is not None: attn_weights = attn_weights * layer_head_mask attn_weights = attn_weights.type(value_states.dtype) attn_output = unshape(torch.einsum("...hqk,...khd->...qhd", attn_weights, value_states)) attn_output = attn_output[:, :seq_length, :] attn_output = self.o(attn_output) present_key_value_state = None outputs = (attn_output,) + (present_key_value_state,) + (position_bias,) if output_attentions: outputs = outputs + (attn_weights,) return outputs class LongT5TransientGlobalAttention(nn.Module): def __init__(self, config: LongT5Config, has_relative_attention_bias: bool = False) -> None: super().__init__() self.is_decoder = config.is_decoder self.has_relative_attention_bias = has_relative_attention_bias self.relative_attention_num_buckets = config.relative_attention_num_buckets self.relative_attention_max_distance = config.relative_attention_max_distance self.d_model = config.d_model self.key_value_proj_dim = config.d_kv self.n_heads = config.num_heads self.local_radius = config.local_radius self.block_len = self.local_radius + 1 self.global_block_size = config.global_block_size self.dropout = config.dropout_rate self.inner_dim = self.n_heads * self.key_value_proj_dim # Mesh TensorFlow initialization to avoid scaling before softmax self.q = nn.Linear(self.d_model, self.inner_dim, bias=False) self.k = nn.Linear(self.d_model, self.inner_dim, bias=False) self.v = nn.Linear(self.d_model, self.inner_dim, bias=False) self.o = nn.Linear(self.inner_dim, self.d_model, bias=False) if self.has_relative_attention_bias: self.relative_attention_bias = nn.Embedding(self.relative_attention_num_buckets, self.n_heads) self.pruned_heads = set() # Relativen attention bias & Layer norm for global attention if self.has_relative_attention_bias: self.global_relative_attention_bias = nn.Embedding(self.relative_attention_num_buckets, self.n_heads) self.global_input_layer_norm = LongT5LayerNorm(config.d_model, eps=config.layer_norm_epsilon) # Copied from transformers.models.t5.modeling_t5.T5Attention.prune_heads def prune_heads(self, heads): if len(heads) == 0: return heads, index = find_pruneable_heads_and_indices( heads, self.n_heads, self.key_value_proj_dim, self.pruned_heads ) # Prune linear layers self.q = prune_linear_layer(self.q, index) self.k = prune_linear_layer(self.k, index) self.v = prune_linear_layer(self.v, index) self.o = prune_linear_layer(self.o, index, dim=1) # Update hyper params self.n_heads = self.n_heads - len(heads) self.inner_dim = self.key_value_proj_dim * self.n_heads self.pruned_heads = self.pruned_heads.union(heads) @staticmethod # Copied from transformers.models.t5.modeling_t5.T5Attention._relative_position_bucket def _relative_position_bucket(relative_position, bidirectional=True, num_buckets=32, max_distance=128): """ Adapted from Mesh Tensorflow: https://github.com/tensorflow/mesh/blob/0cb87fe07da627bf0b7e60475d59f95ed6b5be3d/mesh_tensorflow/transformer/transformer_layers.py#L593 Translate relative position to a bucket number for relative attention. The relative position is defined as memory_position - query_position, i.e. the distance in tokens from the attending position to the attended-to position. If bidirectional=False, then positive relative positions are invalid. We use smaller buckets for small absolute relative_position and larger buckets for larger absolute relative_positions. All relative positions >=max_distance map to the same bucket. All relative positions <=-max_distance map to the same bucket. This should allow for more graceful generalization to longer sequences than the model has been trained on Args: relative_position: an int32 Tensor bidirectional: a boolean - whether the attention is bidirectional num_buckets: an integer max_distance: an integer Returns: a Tensor with the same shape as relative_position, containing int32 values in the range [0, num_buckets) """ relative_buckets = 0 if bidirectional: num_buckets //= 2 relative_buckets += (relative_position > 0).to(torch.long) * num_buckets relative_position = torch.abs(relative_position) else: relative_position = -torch.min(relative_position, torch.zeros_like(relative_position)) # now relative_position is in the range [0, inf) # half of the buckets are for exact increments in positions max_exact = num_buckets // 2 is_small = relative_position < max_exact # The other half of the buckets are for logarithmically bigger bins in positions up to max_distance relative_position_if_large = max_exact + ( torch.log(relative_position.float() / max_exact) / math.log(max_distance / max_exact) * (num_buckets - max_exact) ).to(torch.long) relative_position_if_large = torch.min( relative_position_if_large, torch.full_like(relative_position_if_large, num_buckets - 1) ) relative_buckets += torch.where(is_small, relative_position, relative_position_if_large) return relative_buckets def compute_bias(self, block_length: int): """Compute binned relative position bias""" target_device = ( self.relative_attention_bias.weight.device if self.relative_attention_bias.weight.device.type != "meta" else None ) memory_position = torch.arange(3 * block_length, dtype=torch.long, device=target_device) context_position = memory_position[block_length:-block_length] # (block_length, 3 * block_length) relative_position = memory_position[None, :] - context_position[:, None] relative_position_bucket = self._relative_position_bucket( relative_position, # (block_length, 3 * block_length) bidirectional=(not self.is_decoder), num_buckets=self.relative_attention_num_buckets, max_distance=self.relative_attention_max_distance, ) # (block_length, 3 * block_length, num_heads) values = self.relative_attention_bias(relative_position_bucket) # (1, 1, num_heads, block_length, 3 * block_length) values = values.permute([2, 0, 1]).unsqueeze(0).unsqueeze(0) return values def compute_side_bias(self, mask: torch.Tensor, global_segment_ids: torch.Tensor) -> torch.Tensor: # (batch_size, 1, seq_len, global_seq_len) side_attention_mask = torch.eq(mask[..., None], global_segment_ids[:, None, :])[:, None, ...] attention_side_bias = torch.where(side_attention_mask > 0, 0.0, -1e10) # (batch_size, seq_len, global_seq_len) side_relative_position = _make_side_relative_position_ids(mask, self.global_block_size) side_relative_position_bucket = self._relative_position_bucket( side_relative_position, bidirectional=(not self.is_decoder), num_buckets=self.relative_attention_num_buckets, max_distance=self.relative_attention_max_distance, ) # (batch_size, seq_len, global_seq_len, num_heads) side_bias = self.global_relative_attention_bias(side_relative_position_bucket) # (batch_size, num_heads, seq_len, global_seq_len) side_bias = side_bias.permute([0, 3, 1, 2]) # (batch_size, num_heads, seq_len, global_seq_len) attention_side_bias = attention_side_bias + side_bias return attention_side_bias def forward( self, hidden_states, mask=None, position_bias=None, layer_head_mask=None, output_attentions=False, ): batch_size, seq_length = hidden_states.shape[:2] def shape(states): """projection""" return states.view(batch_size, -1, self.n_heads, self.key_value_proj_dim) def unshape(states): """reshape""" return states.contiguous().view(batch_size, -1, self.inner_dim) # Prepare components for transient-global attention # Obtain block_ids and global_segment_ids # global_seq_len := seq_len // self.global_block_size # shapes: (batch_size, seq_len) & (batch_size, global_seq_len) block_ids, global_segment_ids = _make_global_fixed_block_ids( mask if mask is not None else torch.ones(hidden_states.shape[:-1]), self.global_block_size, ) # Create global inputs _global_seq_len = global_segment_ids.shape[-1] global_inputs = _create_global_aggregates(hidden_states, block_ids, _global_seq_len) global_inputs = self.global_input_layer_norm(global_inputs) # get query states -> (batch_size, seq_length, n_heads, dim_per_head) query_states = shape(self.q(hidden_states)) key_states = shape(self.k(hidden_states)) value_states = shape(self.v(hidden_states)) # Get global/side key/value states shape: (batch_size, global_seq_len, n_heads, dim_per_head) side_key_states = shape(self.k(global_inputs)) side_value_states = shape(self.v(global_inputs)) # Split into blocks -> (batch_size, num_blocks, block_len, n_heads, dim_per_head) query_states = _split_into_blocks(query_states, self.block_len, dim=1) key_states = _split_into_blocks(key_states, self.block_len, dim=1) value_states = _split_into_blocks(value_states, self.block_len, dim=1) # Concatenate 3 blocks for keys and values -> (batch_size, num_blocks, 3 * block_len, n_heads, dim_per_head) key_states = _concatenate_3_blocks(key_states, block_dim=1, sequence_dim=2) value_states = _concatenate_3_blocks(value_states, block_dim=1, sequence_dim=2) # Tile side inputs across local key/value blocks # New shape: (batch_size, num_blocks, global_seq_len, n_heads, dim_per_head) reps = [1] * (side_key_states.ndim + 1) reps[1] = key_states.shape[1] side_key_states = side_key_states.unsqueeze(1).repeat(reps) side_value_states = side_value_states.unsqueeze(1).repeat(reps) # Concatenate "local" and "side"/"global" key/value states to allow each token to attend global aggregated ones # New shape: (batch_size, num_blocks, 3 * block_len + global_seq_len, n_heads, dim_per_head) key_states = torch.cat([key_states, side_key_states], dim=2) value_states = torch.cat([value_states, side_value_states], dim=2) # Compute scores -> (batch_size, num_block, n_heads, block_len, 3 * block_len + global_seq_len) scores = torch.einsum("...qhd,...khd->...hqk", query_states, key_states) if mask is not None: # We need to adjust position bias shape to be sum with mask local_attention_mask = _get_local_attention_mask(mask, self.block_len, hidden_states.device) # Replace masked positions with -10_000 (according to the original implementation) local_attention_mask = torch.where(local_attention_mask > 0, 0.0, -1e10) else: local_attention_mask = None if position_bias is None: # position_bias shape: # (1, 1, n_heads, block_len, 3 * block_len) if not self.has_relative_attention_bias: position_bias = torch.zeros( (1, 1, self.n_heads, self.block_len, 3 * self.block_len), device=scores.device, dtype=scores.dtype, ) if self.gradient_checkpointing and self.training: position_bias.requires_grad = True else: position_bias = self.compute_bias(self.block_len) if local_attention_mask is not None: # (batch_size, 1, n_heads, block_len, 3 * block_len) position_bias = position_bias + local_attention_mask.transpose(1, 2) position_bias = position_bias.type(scores.dtype) # Calculate global/side bias - shape: # (batch_size, num_heads, seq_len, global_seq_len) if mask is None: mask = torch.ones(batch_size, seq_length) # (batch_size, num_heads, seq_len, global_seq_len) side_position_bias = self.compute_side_bias(mask, global_segment_ids) # (batch_size, num_blocks, num_heads, block_len, global_seq_len) side_position_bias = _split_into_blocks(side_position_bias, self.block_len, dim=-2).transpose(1, 2) side_position_bias = side_position_bias.type(scores.dtype).to(scores.device) # (batch_size, num_blocks, num_heads, block_len, 3 * block_len + global_seq_len) position_bias = torch.cat([position_bias, side_position_bias], dim=-1) scores += position_bias # (batch_size, num_blocks, n_heads, block_len, 3 * block_len + global_seq_len) attn_weights = nn.functional.softmax(scores.float(), dim=-1).type_as(scores) attn_weights = nn.functional.dropout(attn_weights, p=self.dropout, training=self.training) # Mask heads if we want to if layer_head_mask is not None: attn_weights = attn_weights * layer_head_mask attn_weights = attn_weights.type(value_states.dtype) attn_output = unshape(torch.einsum("...hqk,...khd->...qhd", attn_weights, value_states)) attn_output = attn_output[:, :seq_length, :] attn_output = self.o(attn_output) present_key_value_state = None outputs = (attn_output,) + (present_key_value_state,) + (position_bias,) if output_attentions: outputs = outputs + (attn_weights,) return outputs # Copied from transformers.models.t5.modeling_t5.T5LayerSelfAttention with T5->LongT5 class LongT5LayerSelfAttention(nn.Module): def __init__(self, config, has_relative_attention_bias=False): super().__init__() self.SelfAttention = LongT5Attention(config, has_relative_attention_bias=has_relative_attention_bias) self.layer_norm = LongT5LayerNorm(config.d_model, eps=config.layer_norm_epsilon) self.dropout = nn.Dropout(config.dropout_rate) def forward( self, hidden_states, attention_mask=None, position_bias=None, layer_head_mask=None, past_key_value=None, use_cache=False, output_attentions=False, ): normed_hidden_states = self.layer_norm(hidden_states) attention_output = self.SelfAttention( normed_hidden_states, mask=attention_mask, position_bias=position_bias, layer_head_mask=layer_head_mask, past_key_value=past_key_value, use_cache=use_cache, output_attentions=output_attentions, ) hidden_states = hidden_states + self.dropout(attention_output[0]) outputs = (hidden_states,) + attention_output[1:] # add attentions if we output them return outputs class LongT5LayerLocalSelfAttention(nn.Module): """Local self attention used in encoder""" def __init__(self, config, has_relative_attention_bias=False): super().__init__() self.LocalSelfAttention = LongT5LocalAttention(config, has_relative_attention_bias=has_relative_attention_bias) self.layer_norm = LongT5LayerNorm(config.d_model, eps=config.layer_norm_epsilon) self.dropout = nn.Dropout(config.dropout_rate) def forward( self, hidden_states, attention_mask=None, position_bias=None, layer_head_mask=None, output_attentions=False, **kwargs: Any, # to accept past_key_value and use_cache kwargs ): normed_hidden_states = self.layer_norm(hidden_states) attention_output = self.LocalSelfAttention( normed_hidden_states, mask=attention_mask, position_bias=position_bias, layer_head_mask=layer_head_mask, output_attentions=output_attentions, ) hidden_states = hidden_states + self.dropout(attention_output[0]) outputs = (hidden_states,) + attention_output[1:] # add attentions if we output them return outputs class LongT5LayerTransientGlobalSelfAttention(nn.Module): """Transient-Global self attention used in encoder""" def __init__(self, config, has_relative_attention_bias=False): super().__init__() self.TransientGlobalSelfAttention = LongT5TransientGlobalAttention( config, has_relative_attention_bias=has_relative_attention_bias ) self.layer_norm = LongT5LayerNorm(config.d_model, eps=config.layer_norm_epsilon) self.dropout = nn.Dropout(config.dropout_rate) def forward( self, hidden_states, attention_mask=None, position_bias=None, layer_head_mask=None, output_attentions=False, **kwargs: Any, # to accept past_key_value and use_cache kwargs ): normed_hidden_states = self.layer_norm(hidden_states) attention_output = self.TransientGlobalSelfAttention( normed_hidden_states, mask=attention_mask, position_bias=position_bias, layer_head_mask=layer_head_mask, output_attentions=output_attentions, ) hidden_states = hidden_states + self.dropout(attention_output[0]) outputs = (hidden_states,) + attention_output[1:] # add attentions if we output them return outputs # Copied from transformers.models.t5.modeling_t5.T5LayerCrossAttention with T5->LongT5 class LongT5LayerCrossAttention(nn.Module): def __init__(self, config): super().__init__() self.EncDecAttention = LongT5Attention(config, has_relative_attention_bias=False) self.layer_norm = LongT5LayerNorm(config.d_model, eps=config.layer_norm_epsilon) self.dropout = nn.Dropout(config.dropout_rate) def forward( self, hidden_states, key_value_states, attention_mask=None, position_bias=None, layer_head_mask=None, past_key_value=None, use_cache=False, query_length=None, output_attentions=False, ): normed_hidden_states = self.layer_norm(hidden_states) attention_output = self.EncDecAttention( normed_hidden_states, mask=attention_mask, key_value_states=key_value_states, position_bias=position_bias, layer_head_mask=layer_head_mask, past_key_value=past_key_value, use_cache=use_cache, query_length=query_length, output_attentions=output_attentions, ) layer_output = hidden_states + self.dropout(attention_output[0]) outputs = (layer_output,) + attention_output[1:] # add attentions if we output them return outputs class LongT5Block(nn.Module): def __init__(self, config, has_relative_attention_bias=False): super().__init__() self.is_decoder = config.is_decoder if config.is_decoder: attention_layer = LongT5LayerSelfAttention elif config.encoder_attention_type == "local": attention_layer = LongT5LayerLocalSelfAttention elif config.encoder_attention_type == "transient-global": attention_layer = LongT5LayerTransientGlobalSelfAttention else: raise ValueError( "For encoder attention mechanism, either `local` or `transient-global` attention type is expected, " f"but got {config.encoder_attention_type}." ) self.layer = nn.ModuleList() self.layer.append(attention_layer(config, has_relative_attention_bias=has_relative_attention_bias)) if self.is_decoder: self.layer.append(LongT5LayerCrossAttention(config)) self.layer.append(LongT5LayerFF(config)) def forward( self, hidden_states, attention_mask=None, position_bias=None, encoder_hidden_states=None, encoder_attention_mask=None, encoder_decoder_position_bias=None, layer_head_mask=None, cross_attn_layer_head_mask=None, past_key_value=None, use_cache=False, output_attentions=False, return_dict=True, ): if past_key_value is not None: if not self.is_decoder: logger.warning("`past_key_values` is passed to the encoder. Please make sure this is intended.") expected_num_past_key_values = 2 if encoder_hidden_states is None else 4 if len(past_key_value) != expected_num_past_key_values: raise ValueError( f"There should be {expected_num_past_key_values} past states. " f"{'2 (past / key) for cross attention. ' if expected_num_past_key_values == 4 else ''}" f"Got {len(past_key_value)} past key / value states" ) self_attn_past_key_value = past_key_value[:2] cross_attn_past_key_value = past_key_value[2:] else: self_attn_past_key_value, cross_attn_past_key_value = None, None self_attention_outputs = self.layer[0]( hidden_states, attention_mask=attention_mask, position_bias=position_bias, layer_head_mask=layer_head_mask, past_key_value=self_attn_past_key_value, use_cache=use_cache, output_attentions=output_attentions, ) hidden_states, present_key_value_state = self_attention_outputs[:2] attention_outputs = self_attention_outputs[2:] # Keep self-attention outputs and relative position weights # clamp inf values to enable fp16 inference - check https://github.com/huggingface/transformers/pull/19229/ if hidden_states.dtype == torch.float16 and torch.isinf(hidden_states).any(): clamp_value = torch.finfo(hidden_states.dtype).max - 1000 hidden_states = torch.clamp(hidden_states, min=-clamp_value, max=clamp_value) do_cross_attention = self.is_decoder and encoder_hidden_states is not None if do_cross_attention: # the actual query length is unknown for cross attention # if using past key value states. Need to inject it here if present_key_value_state is not None: query_length = present_key_value_state[0].shape[2] else: query_length = None cross_attention_outputs = self.layer[1]( hidden_states, key_value_states=encoder_hidden_states, attention_mask=encoder_attention_mask, position_bias=encoder_decoder_position_bias, layer_head_mask=cross_attn_layer_head_mask, past_key_value=cross_attn_past_key_value, query_length=query_length, use_cache=use_cache, output_attentions=output_attentions, ) hidden_states = cross_attention_outputs[0] # clamp inf values to enable fp16 inference - check https://github.com/huggingface/transformers/pull/19229/ if hidden_states.dtype == torch.float16 and torch.isinf(hidden_states).any(): clamp_value = torch.finfo(hidden_states.dtype).max - 1000 hidden_states = torch.clamp(hidden_states, min=-clamp_value, max=clamp_value) # Combine self attn and cross attn key value states if present_key_value_state is not None: present_key_value_state = present_key_value_state + cross_attention_outputs[1] # Keep cross-attention outputs and relative position weights attention_outputs = attention_outputs + cross_attention_outputs[2:] # Apply Feed Forward layer hidden_states = self.layer[-1](hidden_states) # clamp inf values to enable fp16 inference - check https://github.com/huggingface/transformers/pull/19229/ if hidden_states.dtype == torch.float16 and torch.isinf(hidden_states).any(): clamp_value = torch.finfo(hidden_states.dtype).max - 1000 hidden_states = torch.clamp(hidden_states, min=-clamp_value, max=clamp_value) outputs = (hidden_states,) if use_cache: outputs = outputs + (present_key_value_state,) + attention_outputs else: outputs = outputs + attention_outputs return outputs # hidden-states, present_key_value_states, (self-attention position bias), (self-attention weights), (cross-attention position bias), (cross-attention weights) class LongT5PreTrainedModel(PreTrainedModel): """ An abstract class to handle weights initialization and a simple interface for downloading and loading pretrained models. """ config_class = LongT5Config base_model_prefix = "transformer" supports_gradient_checkpointing = True _no_split_modules = ["LongT5Block"] @property # Copied from transformers.models.t5.modeling_t5.T5PreTrainedModel.dummy_inputs def dummy_inputs(self): input_ids = torch.tensor(DUMMY_INPUTS) input_mask = torch.tensor(DUMMY_MASK) dummy_inputs = { "decoder_input_ids": input_ids, "input_ids": input_ids, "decoder_attention_mask": input_mask, } return dummy_inputs def _init_weights(self, module): """Initialize the weights""" factor = self.config.initializer_factor # Used for testing weights initialization if isinstance(module, LongT5LayerNorm): module.weight.data.fill_(factor * 1.0) elif isinstance(module, (LongT5Model, LongT5ForConditionalGeneration, LongT5EncoderModel)): # Mesh TensorFlow embeddings initialization # See https://github.com/tensorflow/mesh/blob/fa19d69eafc9a482aff0b59ddd96b025c0cb207d/mesh_tensorflow/layers.py#L1624 module.shared.weight.data.normal_(mean=0.0, std=factor * 1.0) if hasattr(module, "lm_head") and not self.config.tie_word_embeddings: module.lm_head.weight.data.normal_(mean=0.0, std=factor * 1.0) elif isinstance(module, LongT5DenseActDense): # Mesh TensorFlow FF initialization # See https://github.com/tensorflow/mesh/blob/master/mesh_tensorflow/transformer/transformer_layers.py#L56 # and https://github.com/tensorflow/mesh/blob/fa19d69eafc9a482aff0b59ddd96b025c0cb207d/mesh_tensorflow/layers.py#L89 module.wi.weight.data.normal_(mean=0.0, std=factor * ((self.config.d_model) ** -0.5)) if hasattr(module.wi, "bias") and module.wi.bias is not None: module.wi.bias.data.zero_() module.wo.weight.data.normal_(mean=0.0, std=factor * ((self.config.d_ff) ** -0.5)) if hasattr(module.wo, "bias") and module.wo.bias is not None: module.wo.bias.data.zero_() elif isinstance(module, LongT5DenseGatedActDense): module.wi_0.weight.data.normal_(mean=0.0, std=factor * ((self.config.d_model) ** -0.5)) if hasattr(module.wi_0, "bias") and module.wi_0.bias is not None: module.wi_0.bias.data.zero_() module.wi_1.weight.data.normal_(mean=0.0, std=factor * ((self.config.d_model) ** -0.5)) if hasattr(module.wi_1, "bias") and module.wi_1.bias is not None: module.wi_1.bias.data.zero_() module.wo.weight.data.normal_(mean=0.0, std=factor * ((self.config.d_ff) ** -0.5)) if hasattr(module.wo, "bias") and module.wo.bias is not None: module.wo.bias.data.zero_() elif isinstance(module, (LongT5Attention, LongT5LocalAttention, LongT5TransientGlobalAttention)): # Mesh TensorFlow attention initialization to avoid scaling before softmax # See https://github.com/tensorflow/mesh/blob/fa19d69eafc9a482aff0b59ddd96b025c0cb207d/mesh_tensorflow/transformer/attention.py#L136 d_model = self.config.d_model key_value_proj_dim = self.config.d_kv n_heads = self.config.num_heads module.q.weight.data.normal_(mean=0.0, std=factor * ((d_model * key_value_proj_dim) ** -0.5)) module.k.weight.data.normal_(mean=0.0, std=factor * (d_model**-0.5)) module.v.weight.data.normal_(mean=0.0, std=factor * (d_model**-0.5)) module.o.weight.data.normal_(mean=0.0, std=factor * ((n_heads * key_value_proj_dim) ** -0.5)) if module.has_relative_attention_bias: module.relative_attention_bias.weight.data.normal_(mean=0.0, std=factor * ((d_model) ** -0.5)) if isinstance(module, LongT5TransientGlobalAttention): module.global_relative_attention_bias.weight.data.normal_( mean=0.0, std=factor * ((d_model) ** -0.5) ) # Copied from transformers.models.t5.modeling_t5.T5PreTrainedModel._shift_right with T5->LongT5 def _shift_right(self, input_ids): decoder_start_token_id = self.config.decoder_start_token_id pad_token_id = self.config.pad_token_id if decoder_start_token_id is None: raise ValueError( "self.model.config.decoder_start_token_id has to be defined. In LongT5 it is usually set to the pad_token_id. " "See LongT5 docs for more information." ) # shift inputs to the right if is_torch_fx_proxy(input_ids): # Item assignment is not supported natively for proxies. shifted_input_ids = torch.full(input_ids.shape[:-1] + (1,), decoder_start_token_id) shifted_input_ids = torch.cat([shifted_input_ids, input_ids[..., :-1]], dim=-1) else: shifted_input_ids = input_ids.new_zeros(input_ids.shape) shifted_input_ids[..., 1:] = input_ids[..., :-1].clone() shifted_input_ids[..., 0] = decoder_start_token_id if pad_token_id is None: raise ValueError("self.model.config.pad_token_id has to be defined.") # replace possible -100 values in labels by `pad_token_id` shifted_input_ids.masked_fill_(shifted_input_ids == -100, pad_token_id) return shifted_input_ids class LongT5Stack(LongT5PreTrainedModel): def __init__(self, config, embed_tokens=None): super().__init__(config) self.embed_tokens = nn.Embedding(config.vocab_size, config.d_model) if embed_tokens is not None: self.embed_tokens.weight = embed_tokens.weight self.is_decoder = config.is_decoder self.local_radius = config.local_radius self.block_len = self.local_radius + 1 self.block = nn.ModuleList( [LongT5Block(config, has_relative_attention_bias=bool(i == 0)) for i in range(config.num_layers)] ) self.final_layer_norm = LongT5LayerNorm(config.d_model, eps=config.layer_norm_epsilon) self.dropout = nn.Dropout(config.dropout_rate) self.gradient_checkpointing = False # Initialize weights and apply final processing self.post_init() # Copied from transformers.models.t5.modeling_t5.T5Stack.get_input_embeddings def get_input_embeddings(self): return self.embed_tokens # Copied from transformers.models.t5.modeling_t5.T5Stack.set_input_embeddings def set_input_embeddings(self, new_embeddings): self.embed_tokens = new_embeddings def forward( self, input_ids=None, attention_mask=None, encoder_hidden_states=None, encoder_attention_mask=None, inputs_embeds=None, head_mask=None, cross_attn_head_mask=None, past_key_values=None, use_cache=None, output_attentions=None, output_hidden_states=None, return_dict=None, ): use_cache = use_cache if use_cache is not None else self.config.use_cache output_attentions = output_attentions if output_attentions is not None else self.config.output_attentions output_hidden_states = ( output_hidden_states if output_hidden_states is not None else self.config.output_hidden_states ) return_dict = return_dict if return_dict is not None else self.config.use_return_dict if input_ids is not None and inputs_embeds is not None: err_msg_prefix = "decoder_" if self.is_decoder else "" raise ValueError( f"You cannot specify both {err_msg_prefix}input_ids and {err_msg_prefix}inputs_embeds at the same time" ) elif input_ids is not None: input_shape = input_ids.size() input_ids = input_ids.view(-1, input_shape[-1]) elif inputs_embeds is not None: input_shape = inputs_embeds.size()[:-1] else: err_msg_prefix = "decoder_" if self.is_decoder else "" raise ValueError(f"You have to specify either {err_msg_prefix}input_ids or {err_msg_prefix}inputs_embeds") if inputs_embeds is None: assert self.embed_tokens is not None, "You have to initialize the model with valid token embeddings" inputs_embeds = self.embed_tokens(input_ids) batch_size, seq_length = input_shape # required mask seq length can be calculated via length of past mask_seq_length = past_key_values[0][0].shape[2] + seq_length if past_key_values is not None else seq_length if use_cache is True: assert self.is_decoder, f"`use_cache` can only be set to `True` if {self} is used as a decoder" if attention_mask is None: attention_mask = torch.ones(batch_size, mask_seq_length, device=inputs_embeds.device) # initialize past_key_values with `None` if past does not exist if past_key_values is None: past_key_values = [None] * len(self.block) # We can provide a self-attention mask of dimensions [batch_size, from_seq_length, to_seq_length] # ourselves in which case we just need to make it broadcastable to all heads. # We use local attention in encoder self-attention, otherwise standard self & cross attentions are used if self.is_decoder: extended_attention_mask = self.get_extended_attention_mask( attention_mask, input_shape, inputs_embeds.device ) elif self.config.encoder_attention_type == "local": extended_attention_mask = _get_local_attention_mask(attention_mask, self.block_len, inputs_embeds.device) else: # we need to use both local attention mask and standard extended mask for transient-global attention extended_attention_mask = attention_mask # If a 2D or 3D attention mask is provided for the cross-attention # we need to make broadcastable to [batch_size, num_heads, seq_length, seq_length] if self.is_decoder and encoder_hidden_states is not None: encoder_batch_size, encoder_sequence_length, _ = encoder_hidden_states.size() encoder_hidden_shape = (encoder_batch_size, encoder_sequence_length) if encoder_attention_mask is None: encoder_attention_mask = torch.ones(encoder_hidden_shape, device=inputs_embeds.device) encoder_extended_attention_mask = self.invert_attention_mask(encoder_attention_mask) else: encoder_extended_attention_mask = None if self.gradient_checkpointing and self.training: if use_cache: logger.warning_once( "`use_cache=True` is incompatible with gradient checkpointing. Setting `use_cache=False`..." ) use_cache = False # Prepare head mask if needed head_mask = self.get_head_mask(head_mask, self.config.num_layers) cross_attn_head_mask = self.get_head_mask(cross_attn_head_mask, self.config.num_layers) present_key_value_states = () if use_cache else None all_hidden_states = () if output_hidden_states else None all_attentions = () if output_attentions else None all_cross_attentions = () if (output_attentions and self.is_decoder) else None position_bias = None encoder_decoder_position_bias = None hidden_states = self.dropout(inputs_embeds) for i, (layer_module, past_key_value) in enumerate(zip(self.block, past_key_values)): layer_head_mask = head_mask[i] cross_attn_layer_head_mask = cross_attn_head_mask[i] if output_hidden_states: all_hidden_states = all_hidden_states + (hidden_states,) if self.gradient_checkpointing and self.training: layer_outputs = self._gradient_checkpointing_func( layer_module.forward, hidden_states, extended_attention_mask, position_bias, encoder_hidden_states, encoder_extended_attention_mask, encoder_decoder_position_bias, layer_head_mask, cross_attn_layer_head_mask, None, # past_key_value is always None with gradient checkpointing use_cache, output_attentions, ) else: layer_outputs = layer_module( hidden_states, attention_mask=extended_attention_mask, position_bias=position_bias, encoder_hidden_states=encoder_hidden_states, encoder_attention_mask=encoder_extended_attention_mask, encoder_decoder_position_bias=encoder_decoder_position_bias, layer_head_mask=layer_head_mask, cross_attn_layer_head_mask=cross_attn_layer_head_mask, past_key_value=past_key_value, use_cache=use_cache, output_attentions=output_attentions, ) # layer_outputs is a tuple with: # hidden-states, key-value-states, (self-attention position bias), (self-attention weights), (cross-attention position bias), (cross-attention weights) if use_cache is False: layer_outputs = layer_outputs[:1] + (None,) + layer_outputs[1:] hidden_states, present_key_value_state = layer_outputs[:2] # We share the position biases between the layers - the first layer store them # layer_outputs = hidden-states, key-value-states (self-attention position bias), (self-attention weights), # (cross-attention position bias), (cross-attention weights) position_bias = layer_outputs[2] if self.is_decoder and encoder_hidden_states is not None: encoder_decoder_position_bias = layer_outputs[4 if output_attentions else 3] # append next layer key value states if use_cache: present_key_value_states = present_key_value_states + (present_key_value_state,) if output_attentions: all_attentions = all_attentions + (layer_outputs[3],) if self.is_decoder: all_cross_attentions = all_cross_attentions + (layer_outputs[5],) hidden_states = self.final_layer_norm(hidden_states) hidden_states = self.dropout(hidden_states) # Add last layer if output_hidden_states: all_hidden_states = all_hidden_states + (hidden_states,) if not return_dict: return tuple( v for v in [ hidden_states, present_key_value_states, all_hidden_states, all_attentions, all_cross_attentions, ] if v is not None ) return BaseModelOutputWithPastAndCrossAttentions( last_hidden_state=hidden_states, past_key_values=present_key_value_states, hidden_states=all_hidden_states, attentions=all_attentions, cross_attentions=all_cross_attentions, ) LONGT5_START_DOCSTRING = r""" The LongT5 model was proposed in [LongT5: Efficient Text-To-Text Transformer for Long Sequences](https://arxiv.org/abs/2112.07916) by Mandy Guo, Joshua Ainslie, David Uthus, Santiago Ontanon, Jianmo Ni, Yun-Hsuan Sung and Yinfei Yang. It's an encoder-decoder transformer pre-trained in a text-to-text denoising generative setting. LongT5 model is an extension of T5 model, and it enables using one of the two different efficient attention mechanisms - (1) Local attention, or (2) Transient-Global attention. This model inherits from [`PreTrainedModel`]. Check the superclass documentation for the generic methods the library implements for all its model (such as downloading or saving, resizing the input embeddings, pruning heads etc.) This model is also a PyTorch [torch.nn.Module](https://pytorch.org/docs/stable/nn.html#torch.nn.Module) subclass. Use it as a regular PyTorch Module and refer to the PyTorch documentation for all matter related to general usage and behavior. Parameters: config ([`LongT5Config`]): Model configuration class with all the parameters of the model. Initializing with a config file does not load the weights associated with the model, only the configuration. Check out the [`~PreTrainedModel.from_pretrained`] method to load the model weights. """ LONGT5_INPUTS_DOCSTRING = r""" Args: input_ids (`torch.LongTensor` of shape `(batch_size, sequence_length)`): Indices of input sequence tokens in the vocabulary. LongT5 is a model with relative position embeddings so you should be able to pad the inputs on both the right and the left. Indices can be obtained using [`AutoTokenizer`]. See [`PreTrainedTokenizer.encode`] and [`PreTrainedTokenizer.__call__`] for detail. [What are input IDs?](../glossary#input-ids) To know more on how to prepare `input_ids` for pretraining take a look a [LONGT5 Training](./longt5#training). attention_mask (`torch.FloatTensor` of shape `(batch_size, sequence_length)`, *optional*): Mask to avoid performing attention on padding token indices. Mask values selected in `[0, 1]`: - 1 for tokens that are **not masked**, - 0 for tokens that are **masked**. [What are attention masks?](../glossary#attention-mask) decoder_input_ids (`torch.LongTensor` of shape `(batch_size, target_sequence_length)`, *optional*): Indices of decoder input sequence tokens in the vocabulary. Indices can be obtained using [`AutoTokenizer`]. See [`PreTrainedTokenizer.encode`] and [`PreTrainedTokenizer.__call__`] for details. [What are decoder input IDs?](../glossary#decoder-input-ids) LONGT5 uses the `pad_token_id` as the starting token for `decoder_input_ids` generation. If `past_key_values` is used, optionally only the last `decoder_input_ids` have to be input (see `past_key_values`). To know more on how to prepare `decoder_input_ids` for pretraining take a look at [LONGT5 Training](./longt5#training). decoder_attention_mask (`torch.BoolTensor` of shape `(batch_size, target_sequence_length)`, *optional*): Default behavior: generate a tensor that ignores pad tokens in `decoder_input_ids`. Causal mask will also be used by default. head_mask (`torch.FloatTensor` of shape `(num_heads,)` or `(num_layers, num_heads)`, *optional*): Mask to nullify selected heads of the self-attention modules in the encoder. Mask values selected in `[0, 1]`: - 1 indicates the head is **not masked**, - 0 indicates the head is **masked**. decoder_head_mask (`torch.FloatTensor` of shape `(num_heads,)` or `(num_layers, num_heads)`, *optional*): Mask to nullify selected heads of the self-attention modules in the decoder. Mask values selected in `[0, 1]`: - 1 indicates the head is **not masked**, - 0 indicates the head is **masked**. cross_attn_head_mask (`torch.Tensor` of shape `(num_heads,)` or `(num_layers, num_heads)`, *optional*): Mask to nullify selected heads of the cross-attention modules in the decoder. Mask values selected in `[0, 1]`: - 1 indicates the head is **not masked**, - 0 indicates the head is **masked**. encoder_outputs (`tuple(tuple(torch.FloatTensor)`, *optional*): Tuple consists of (`last_hidden_state`, `optional`: *hidden_states*, `optional`: *attentions*) `last_hidden_state` of shape `(batch_size, sequence_length, hidden_size)` is a sequence of hidden states at the output of the last layer of the encoder. Used in the cross-attention of the decoder. past_key_values (`tuple(tuple(torch.FloatTensor))` of length `config.n_layers` with each tuple having 4 tensors of shape `(batch_size, num_heads, sequence_length - 1, embed_size_per_head)`): Contains precomputed key and value hidden states of the attention blocks. Can be used to speed up decoding. If `past_key_values` are used, the user can optionally input only the last `decoder_input_ids` (those that don't have their past key value states given to this model) of shape `(batch_size, 1)` instead of all `decoder_input_ids` of shape `(batch_size, sequence_length)`. inputs_embeds (`torch.FloatTensor` of shape `(batch_size, sequence_length, hidden_size)`, *optional*): Optionally, instead of passing `input_ids` you can choose to directly pass an embedded representation. This is useful if you want more control over how to convert `input_ids` indices into associated vectors than the model's internal embedding lookup matrix. decoder_inputs_embeds (`torch.FloatTensor` of shape `(batch_size, target_sequence_length, hidden_size)`, *optional*): Optionally, instead of passing `decoder_input_ids` you can choose to directly pass an embedded representation. If `past_key_values` is used, optionally only the last `decoder_inputs_embeds` have to be input (see `past_key_values`). This is useful if you want more control over how to convert `decoder_input_ids` indices into associated vectors than the model's internal embedding lookup matrix. If `decoder_input_ids` and `decoder_inputs_embeds` are both unset, `decoder_inputs_embeds` takes the value of `inputs_embeds`. use_cache (`bool`, *optional*): If set to `True`, `past_key_values` key value states are returned and can be used to speed up decoding (see `past_key_values`). output_attentions (`bool`, *optional*): Whether or not to return the attentions tensors of all attention layers. See `attentions` under returned tensors for more detail. output_hidden_states (`bool`, *optional*): Whether or not to return the hidden states of all layers. See `hidden_states` under returned tensors for more detail. return_dict (`bool`, *optional*): Whether or not to return a [`~utils.ModelOutput`] instead of a plain tuple. """ LONGT5_ENCODER_INPUTS_DOCSTRING = r""" Args: input_ids (`torch.LongTensor` of shape `(batch_size, sequence_length)`): Indices of input sequence tokens in the vocabulary. LongT5 is a model with relative position embeddings so you should be able to pad the inputs on both the right and the left. Indices can be obtained using [`AutoTokenizer`]. See [`PreTrainedTokenizer.encode`] and [`PreTrainedTokenizer.__call__`] for detail. To know more on how to prepare `input_ids` for pretraining take a look a [LONGT5 Training](./longt5#training). attention_mask (`torch.FloatTensor` of shape `(batch_size, sequence_length)`, *optional*): Mask to avoid performing attention on padding token indices. Mask values selected in `[0, 1]`: - 1 for tokens that are **not masked**, - 0 for tokens that are **masked**. [What are attention masks?](../glossary#attention-mask) head_mask (`torch.FloatTensor` of shape `(num_heads,)` or `(num_layers, num_heads)`, *optional*): Mask to nullify selected heads of the self-attention modules. Mask values selected in `[0, 1]`: - 1 indicates the head is **not masked**, - 0 indicates the head is **masked**. inputs_embeds (`torch.FloatTensor` of shape `(batch_size, sequence_length, hidden_size)`, *optional*): Optionally, instead of passing `input_ids` you can choose to directly pass an embedded representation. This is useful if you want more control over how to convert `input_ids` indices into associated vectors than the model's internal embedding lookup matrix. output_attentions (`bool`, *optional*): Whether or not to return the attentions tensors of all attention layers. See `attentions` under returned tensors for more detail. output_hidden_states (`bool`, *optional*): Whether or not to return the hidden states of all layers. See `hidden_states` under returned tensors for more detail. return_dict (`bool`, *optional*): Whether or not to return a [`~utils.ModelOutput`] instead of a plain tuple. """ # Warning message for FutureWarning: head_mask was separated into two input args - head_mask, decoder_head_mask __HEAD_MASK_WARNING_MSG = """ The input argument `head_mask` was split into two arguments `head_mask` and `decoder_head_mask`. Currently, `decoder_head_mask` is set to copy `head_mask`, but this feature is deprecated and will be removed in future versions. If you do not want to use any `decoder_head_mask` now, please set `decoder_head_mask = torch.ones(num_layers, num_heads)`. """ @add_start_docstrings( "The bare LONGT5 Model transformer outputting raw hidden-states without any specific head on top.", LONGT5_START_DOCSTRING, ) class LongT5Model(LongT5PreTrainedModel): _keys_to_ignore_on_load_unexpected = [ r"decoder.block.0.layer.1.EncDecAttention.relative_attention_bias.weight", ] _tied_weights_keys = ["encoder.embed_tokens.weight", "decoder.embed_tokens.weight"] def __init__(self, config: LongT5Config): super().__init__(config) self.shared = nn.Embedding(config.vocab_size, config.d_model) encoder_config = copy.deepcopy(config) encoder_config.is_decoder = False encoder_config.use_cache = False encoder_config.is_encoder_decoder = False self.encoder = LongT5Stack(encoder_config, self.shared) decoder_config = copy.deepcopy(config) decoder_config.is_decoder = True decoder_config.is_encoder_decoder = False decoder_config.num_layers = config.num_decoder_layers self.decoder = LongT5Stack(decoder_config, self.shared) # Initialize weights and apply final processing self.post_init() def get_input_embeddings(self): return self.shared def set_input_embeddings(self, new_embeddings): self.shared = new_embeddings self.encoder.set_input_embeddings(new_embeddings) self.decoder.set_input_embeddings(new_embeddings) def _tie_weights(self): if self.config.tie_word_embeddings: self._tie_or_clone_weights(self.encoder.embed_tokens, self.shared) self._tie_or_clone_weights(self.decoder.embed_tokens, self.shared) def get_encoder(self): return self.encoder def get_decoder(self): return self.decoder def _prune_heads(self, heads_to_prune): """ Prunes heads of the model. heads_to_prune: dict of {layer_num: list of heads to prune in this layer} See base class PreTrainedModel """ for layer, heads in heads_to_prune.items(): self.encoder.layer[layer].attention.prune_heads(heads) @add_start_docstrings_to_model_forward(LONGT5_INPUTS_DOCSTRING) @replace_return_docstrings(output_type=Seq2SeqModelOutput, config_class=_CONFIG_FOR_DOC) def forward( self, input_ids: Optional[torch.LongTensor] = None, attention_mask: Optional[torch.FloatTensor] = None, decoder_input_ids: Optional[torch.LongTensor] = None, decoder_attention_mask: Optional[torch.BoolTensor] = None, head_mask: Optional[torch.FloatTensor] = None, decoder_head_mask: Optional[torch.FloatTensor] = None, cross_attn_head_mask: Optional[torch.Tensor] = None, encoder_outputs: Optional[Tuple[Tuple[torch.FloatTensor]]] = None, past_key_values: Optional[Tuple[Tuple[torch.FloatTensor]]] = None, inputs_embeds: Optional[torch.Tensor] = None, decoder_inputs_embeds: Optional[torch.Tensor] = None, use_cache: Optional[bool] = None, output_attentions: Optional[bool] = None, output_hidden_states: Optional[bool] = None, return_dict: Optional[bool] = None, ) -> Union[Tuple[torch.FloatTensor], Seq2SeqModelOutput]: r""" Returns: Example: ```python >>> from transformers import AutoTokenizer, LongT5Model >>> tokenizer = AutoTokenizer.from_pretrained("google/long-t5-local-base") >>> model = LongT5Model.from_pretrained("google/long-t5-local-base") >>> # Let's try a very long encoder input. >>> input_ids = tokenizer( ... 100 * "Studies have been shown that owning a dog is good for you", return_tensors="pt" ... ).input_ids # Batch size 1 >>> decoder_input_ids = tokenizer("Studies show that", return_tensors="pt").input_ids # Batch size 1 >>> # forward pass >>> outputs = model(input_ids=input_ids, decoder_input_ids=decoder_input_ids) >>> last_hidden_states = outputs.last_hidden_state ```""" use_cache = use_cache if use_cache is not None else self.config.use_cache return_dict = return_dict if return_dict is not None else self.config.use_return_dict # FutureWarning: head_mask was separated into two input args - head_mask, decoder_head_mask if head_mask is not None and decoder_head_mask is None: if self.config.num_layers == self.config.num_decoder_layers: warnings.warn(__HEAD_MASK_WARNING_MSG, FutureWarning) decoder_head_mask = head_mask # Encode if needed (training, first prediction pass) if encoder_outputs is None: encoder_outputs = self.encoder( input_ids=input_ids, attention_mask=attention_mask, inputs_embeds=inputs_embeds, head_mask=head_mask, output_attentions=output_attentions, output_hidden_states=output_hidden_states, return_dict=return_dict, ) elif return_dict and not isinstance(encoder_outputs, BaseModelOutput): encoder_outputs = BaseModelOutput( last_hidden_state=encoder_outputs[0], hidden_states=encoder_outputs[1] if len(encoder_outputs) > 1 else None, attentions=encoder_outputs[2] if len(encoder_outputs) > 2 else None, ) hidden_states = encoder_outputs[0] # Decode decoder_outputs = self.decoder( input_ids=decoder_input_ids, attention_mask=decoder_attention_mask, inputs_embeds=decoder_inputs_embeds, past_key_values=past_key_values, encoder_hidden_states=hidden_states, encoder_attention_mask=attention_mask, head_mask=decoder_head_mask, cross_attn_head_mask=cross_attn_head_mask, use_cache=use_cache, output_attentions=output_attentions, output_hidden_states=output_hidden_states, return_dict=return_dict, ) if not return_dict: return decoder_outputs + encoder_outputs return Seq2SeqModelOutput( last_hidden_state=decoder_outputs.last_hidden_state, past_key_values=decoder_outputs.past_key_values, decoder_hidden_states=decoder_outputs.hidden_states, decoder_attentions=decoder_outputs.attentions, cross_attentions=decoder_outputs.cross_attentions, encoder_last_hidden_state=encoder_outputs.last_hidden_state, encoder_hidden_states=encoder_outputs.hidden_states, encoder_attentions=encoder_outputs.attentions, ) @add_start_docstrings("""LONGT5 Model with a `language modeling` head on top.""", LONGT5_START_DOCSTRING) class LongT5ForConditionalGeneration(LongT5PreTrainedModel): _keys_to_ignore_on_load_unexpected = [ r"decoder.block.0.layer.1.EncDecAttention.relative_attention_bias.weight", ] _tied_weights_keys = ["encoder.embed_tokens.weight", "decoder.embed_tokens.weight", "lm_head.weight"] def __init__(self, config: LongT5Config): super().__init__(config) self.model_dim = config.d_model self.shared = nn.Embedding(config.vocab_size, config.d_model) encoder_config = copy.deepcopy(config) encoder_config.is_decoder = False encoder_config.use_cache = False encoder_config.is_encoder_decoder = False self.encoder = LongT5Stack(encoder_config, self.shared) decoder_config = copy.deepcopy(config) decoder_config.is_decoder = True decoder_config.is_encoder_decoder = False decoder_config.num_layers = config.num_decoder_layers self.decoder = LongT5Stack(decoder_config, self.shared) self.lm_head = nn.Linear(config.d_model, config.vocab_size, bias=False) # Initialize weights and apply final processing self.post_init() def get_input_embeddings(self): return self.shared def set_input_embeddings(self, new_embeddings): self.shared = new_embeddings self.encoder.set_input_embeddings(new_embeddings) self.decoder.set_input_embeddings(new_embeddings) def _tie_weights(self): if self.config.tie_word_embeddings: self._tie_or_clone_weights(self.encoder.embed_tokens, self.shared) self._tie_or_clone_weights(self.decoder.embed_tokens, self.shared) def set_output_embeddings(self, new_embeddings): self.lm_head = new_embeddings def get_output_embeddings(self): return self.lm_head def get_encoder(self): return self.encoder def get_decoder(self): return self.decoder @add_start_docstrings_to_model_forward(LONGT5_INPUTS_DOCSTRING) @replace_return_docstrings(output_type=Seq2SeqLMOutput, config_class=_CONFIG_FOR_DOC) def forward( self, input_ids: Optional[torch.LongTensor] = None, attention_mask: Optional[torch.FloatTensor] = None, decoder_input_ids: Optional[torch.LongTensor] = None, decoder_attention_mask: Optional[torch.BoolTensor] = None, head_mask: Optional[torch.FloatTensor] = None, decoder_head_mask: Optional[torch.FloatTensor] = None, cross_attn_head_mask: Optional[torch.Tensor] = None, encoder_outputs: Optional[Tuple[Tuple[torch.Tensor]]] = None, past_key_values: Optional[Tuple[Tuple[torch.Tensor]]] = None, inputs_embeds: Optional[torch.FloatTensor] = None, decoder_inputs_embeds: Optional[torch.FloatTensor] = None, labels: Optional[torch.LongTensor] = None, use_cache: Optional[bool] = None, output_attentions: Optional[bool] = None, output_hidden_states: Optional[bool] = None, return_dict: Optional[bool] = None, ) -> Union[Tuple[torch.FloatTensor], Seq2SeqLMOutput]: r""" labels (`torch.LongTensor` of shape `(batch_size,)`, *optional*): Labels for computing the sequence classification/regression loss. Indices should be in `[-100, 0, ..., config.vocab_size - 1]`. All labels set to `-100` are ignored (masked), the loss is only computed for labels in `[0, ..., config.vocab_size]` Returns: Examples: ```python >>> from transformers import AutoTokenizer, LongT5ForConditionalGeneration >>> tokenizer = AutoTokenizer.from_pretrained("Stancld/longt5-tglobal-large-16384-pubmed-3k_steps") >>> model = LongT5ForConditionalGeneration.from_pretrained( ... "Stancld/longt5-tglobal-large-16384-pubmed-3k_steps" ... ) >>> # Let's try a very long input. >>> inputs = tokenizer(100 * "studies have shown that owning a dog is good for you ", return_tensors="pt") >>> input_ids = inputs.input_ids >>> outputs = model.generate(input_ids) >>> print(tokenizer.decode(outputs[0], skip_special_tokens=True)) abstractthe aim of this article is to provide an overview of the literature on the role of dog ```""" use_cache = use_cache if use_cache is not None else self.config.use_cache return_dict = return_dict if return_dict is not None else self.config.use_return_dict # FutureWarning: head_mask was separated into two input args - head_mask, decoder_head_mask if head_mask is not None and decoder_head_mask is None: if self.config.num_layers == self.config.num_decoder_layers: warnings.warn(__HEAD_MASK_WARNING_MSG, FutureWarning) decoder_head_mask = head_mask # Encode if needed (training, first prediction pass) if encoder_outputs is None: # Convert encoder inputs in embeddings if needed encoder_outputs = self.encoder( input_ids=input_ids, attention_mask=attention_mask, inputs_embeds=inputs_embeds, head_mask=head_mask, output_attentions=output_attentions, output_hidden_states=output_hidden_states, return_dict=return_dict, ) elif return_dict and not isinstance(encoder_outputs, BaseModelOutput): encoder_outputs = BaseModelOutput( last_hidden_state=encoder_outputs[0], hidden_states=encoder_outputs[1] if len(encoder_outputs) > 1 else None, attentions=encoder_outputs[2] if len(encoder_outputs) > 2 else None, ) hidden_states = encoder_outputs[0] if labels is not None and decoder_input_ids is None and decoder_inputs_embeds is None: # get decoder inputs from shifting lm labels to the right decoder_input_ids = self._shift_right(labels) # Decode decoder_outputs = self.decoder( input_ids=decoder_input_ids, attention_mask=decoder_attention_mask, inputs_embeds=decoder_inputs_embeds, past_key_values=past_key_values, encoder_hidden_states=hidden_states, encoder_attention_mask=attention_mask, head_mask=decoder_head_mask, cross_attn_head_mask=cross_attn_head_mask, use_cache=use_cache, output_attentions=output_attentions, output_hidden_states=output_hidden_states, return_dict=return_dict, ) sequence_output = decoder_outputs[0] if self.config.tie_word_embeddings: # Rescale output before projecting on vocab # See https://github.com/tensorflow/mesh/blob/fa19d69eafc9a482aff0b59ddd96b025c0cb207d/mesh_tensorflow/transformer/transformer.py#L586 sequence_output = sequence_output * (self.model_dim**-0.5) lm_logits = self.lm_head(sequence_output) loss = None if labels is not None: loss_fct = CrossEntropyLoss(ignore_index=-100) labels = labels.to(lm_logits.device) loss = loss_fct(lm_logits.view(-1, lm_logits.size(-1)), labels.view(-1)) # TODO(thom): Add z_loss https://github.com/tensorflow/mesh/blob/fa19d69eafc9a482aff0b59ddd96b025c0cb207d/mesh_tensorflow/layers.py#L666 if not return_dict: output = (lm_logits,) + decoder_outputs[1:] + encoder_outputs return ((loss,) + output) if loss is not None else output return Seq2SeqLMOutput( loss=loss, logits=lm_logits, past_key_values=decoder_outputs.past_key_values, decoder_hidden_states=decoder_outputs.hidden_states, decoder_attentions=decoder_outputs.attentions, cross_attentions=decoder_outputs.cross_attentions, encoder_last_hidden_state=encoder_outputs.last_hidden_state, encoder_hidden_states=encoder_outputs.hidden_states, encoder_attentions=encoder_outputs.attentions, ) def prepare_inputs_for_generation( self, input_ids, past_key_values=None, attention_mask=None, head_mask=None, decoder_head_mask=None, cross_attn_head_mask=None, use_cache=None, encoder_outputs=None, **kwargs, ): # cut decoder_input_ids if past_key_values is used if past_key_values is not None: past_length = past_key_values[0][0].shape[2] # Some generation methods already pass only the last input ID if input_ids.shape[1] > past_length: remove_prefix_length = past_length else: # Default to old behavior: keep only final ID remove_prefix_length = input_ids.shape[1] - 1 input_ids = input_ids[:, remove_prefix_length:] return { "decoder_input_ids": input_ids, "past_key_values": past_key_values, "encoder_outputs": encoder_outputs, "attention_mask": attention_mask, "head_mask": head_mask, "decoder_head_mask": decoder_head_mask, "cross_attn_head_mask": cross_attn_head_mask, "use_cache": use_cache, } def prepare_decoder_input_ids_from_labels(self, labels: torch.Tensor): return self._shift_right(labels) def _reorder_cache(self, past_key_values, beam_idx): # if decoder past is not included in output # speedy decoding is disabled and no need to reorder if past_key_values is None: logger.warning("You might want to consider setting `use_cache=True` to speed up decoding") return past_key_values reordered_decoder_past = () for layer_past_states in past_key_values: # get the correct batch idx from layer past batch dim # batch dim of `past` is at 2nd position reordered_layer_past_states = () for layer_past_state in layer_past_states: # need to set correct `past` for each of the four key / value states reordered_layer_past_states = reordered_layer_past_states + ( layer_past_state.index_select(0, beam_idx.to(layer_past_state.device)), ) assert reordered_layer_past_states[0].shape == layer_past_states[0].shape assert len(reordered_layer_past_states) == len(layer_past_states) reordered_decoder_past = reordered_decoder_past + (reordered_layer_past_states,) return reordered_decoder_past @add_start_docstrings( "The bare LONGT5 Model transformer outputting encoder's raw hidden-states without any specific head on top.", LONGT5_START_DOCSTRING, ) class LongT5EncoderModel(LongT5PreTrainedModel): _tied_weights_keys = ["encoder.embed_tokens.weight"] _keys_to_ignore_on_load_unexpected = [r"decoder"] def __init__(self, config: LongT5Config): super().__init__(config) self.shared = nn.Embedding(config.vocab_size, config.d_model) encoder_config = copy.deepcopy(config) encoder_config.use_cache = False encoder_config.is_encoder_decoder = False self.encoder = LongT5Stack(encoder_config, self.shared) # Initialize weights and apply final processing self.post_init() def get_input_embeddings(self): return self.shared def set_input_embeddings(self, new_embeddings): self.shared = new_embeddings self.encoder.set_input_embeddings(new_embeddings) def _tie_weights(self): if self.config.tie_word_embeddings: self._tie_or_clone_weights(self.encoder.embed_tokens, self.shared) def get_encoder(self): return self.encoder def _prune_heads(self, heads_to_prune): """ Prunes heads of the model. heads_to_prune: dict of {layer_num: list of heads to prune in this layer} See base class PreTrainedModel """ for layer, heads in heads_to_prune.items(): self.encoder.layer[layer].attention.prune_heads(heads) @add_start_docstrings_to_model_forward(LONGT5_ENCODER_INPUTS_DOCSTRING) @replace_return_docstrings(output_type=BaseModelOutput, config_class=_CONFIG_FOR_DOC) def forward( self, input_ids: Optional[torch.LongTensor] = None, attention_mask: Optional[torch.FloatTensor] = None, head_mask: Optional[torch.FloatTensor] = None, inputs_embeds: Optional[torch.FloatTensor] = None, output_attentions: Optional[bool] = None, output_hidden_states: Optional[bool] = None, return_dict: Optional[bool] = None, ) -> Union[Tuple[torch.FloatTensor], BaseModelOutput]: r""" Returns: Example: ```python >>> from transformers import AutoTokenizer, LongT5ForConditionalGeneration >>> tokenizer = AutoTokenizer.from_pretrained("google/long-t5-local-base") >>> model = LongT5EncoderModel.from_pretrained("google/long-t5-local-base") >>> input_ids = tokenizer( ... 100 * "Studies have been shown that owning a dog is good for you ", return_tensors="pt" ... ).input_ids # Batch size 1 >>> outputs = model(input_ids=input_ids) >>> last_hidden_states = outputs.last_hidden_state ```""" return_dict = return_dict if return_dict is not None else self.config.use_return_dict encoder_outputs = self.encoder( input_ids=input_ids, attention_mask=attention_mask, inputs_embeds=inputs_embeds, head_mask=head_mask, output_attentions=output_attentions, output_hidden_states=output_hidden_states, return_dict=return_dict, ) return encoder_outputs

transformers/src/transformers/models/longt5/modeling_longt5.py/0

{ "file_path": "transformers/src/transformers/models/longt5/modeling_longt5.py", "repo_id": "transformers", "token_count": 45685 }

99

# coding=utf-8 # Copyright 2022 The HuggingFace Inc. team. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. """ Fast tokenization class for MarkupLM. It overwrites 2 methods of the slow tokenizer class, namely _batch_encode_plus and _encode_plus, in which the Rust tokenizer is used. """ import json from functools import lru_cache from typing import Dict, List, Optional, Tuple, Union from tokenizers import pre_tokenizers, processors from ...file_utils import PaddingStrategy, TensorType, add_end_docstrings from ...tokenization_utils_base import ( ENCODE_KWARGS_DOCSTRING, AddedToken, BatchEncoding, EncodedInput, PreTokenizedInput, TextInput, TextInputPair, TruncationStrategy, ) from ...tokenization_utils_fast import PreTrainedTokenizerFast from ...utils import logging from .tokenization_markuplm import MARKUPLM_ENCODE_PLUS_ADDITIONAL_KWARGS_DOCSTRING, MarkupLMTokenizer logger = logging.get_logger(__name__) VOCAB_FILES_NAMES = {"vocab_file": "vocab.json", "merges_file": "merges.txt", "tokenizer_file": "tokenizer.json"} PRETRAINED_VOCAB_FILES_MAP = { "vocab_file": { "microsoft/markuplm-base": "https://huggingface.co/microsoft/markuplm-base/resolve/main/vocab.json", "microsoft/markuplm-large": "https://huggingface.co/microsoft/markuplm-large/resolve/main/vocab.json", }, "merges_file": { "microsoft/markuplm-base": "https://huggingface.co/microsoft/markuplm-base/resolve/main/merges.txt", "microsoft/markuplm-large": "https://huggingface.co/microsoft/markuplm-large/resolve/main/merges.txt", }, } PRETRAINED_POSITIONAL_EMBEDDINGS_SIZES = { "microsoft/markuplm-base": 512, "microsoft/markuplm-large": 512, } @lru_cache() def bytes_to_unicode(): """ Returns list of utf-8 byte and a mapping to unicode strings. We specifically avoids mapping to whitespace/control characters the bpe code barfs on. The reversible bpe codes work on unicode strings. This means you need a large # of unicode characters in your vocab if you want to avoid UNKs. When you're at something like a 10B token dataset you end up needing around 5K for decent coverage. This is a significant percentage of your normal, say, 32K bpe vocab. To avoid that, we want lookup tables between utf-8 bytes and unicode strings. """ bs = ( list(range(ord("!"), ord("~") + 1)) + list(range(ord("¡"), ord("¬") + 1)) + list(range(ord("®"), ord("ÿ") + 1)) ) cs = bs[:] n = 0 for b in range(2**8): if b not in bs: bs.append(b) cs.append(2**8 + n) n += 1 cs = [chr(n) for n in cs] return dict(zip(bs, cs)) def get_pairs(word): """ Return set of symbol pairs in a word. Word is represented as tuple of symbols (symbols being variable-length strings). """ pairs = set() prev_char = word[0] for char in word[1:]: pairs.add((prev_char, char)) prev_char = char return pairs class MarkupLMTokenizerFast(PreTrainedTokenizerFast): r""" Construct a MarkupLM tokenizer. Based on byte-level Byte-Pair-Encoding (BPE). [`MarkupLMTokenizerFast`] can be used to turn HTML strings into to token-level `input_ids`, `attention_mask`, `token_type_ids`, `xpath_tags_seq` and `xpath_tags_seq`. This tokenizer inherits from [`PreTrainedTokenizer`] which contains most of the main methods. Users should refer to this superclass for more information regarding those methods. Args: vocab_file (`str`): Path to the vocabulary file. merges_file (`str`): Path to the merges file. errors (`str`, *optional*, defaults to `"replace"`): Paradigm to follow when decoding bytes to UTF-8. See [bytes.decode](https://docs.python.org/3/library/stdtypes.html#bytes.decode) for more information. bos_token (`str`, *optional*, defaults to `"<s>"`): The beginning of sequence token that was used during pretraining. Can be used a sequence classifier token. <Tip> When building a sequence using special tokens, this is not the token that is used for the beginning of sequence. The token used is the `cls_token`. </Tip> eos_token (`str`, *optional*, defaults to `"</s>"`): The end of sequence token. <Tip> When building a sequence using special tokens, this is not the token that is used for the end of sequence. The token used is the `sep_token`. </Tip> sep_token (`str`, *optional*, defaults to `"</s>"`): The separator token, which is used when building a sequence from multiple sequences, e.g. two sequences for sequence classification or for a text and a question for question answering. It is also used as the last token of a sequence built with special tokens. cls_token (`str`, *optional*, defaults to `"<s>"`): The classifier token which is used when doing sequence classification (classification of the whole sequence instead of per-token classification). It is the first token of the sequence when built with special tokens. unk_token (`str`, *optional*, defaults to `"<unk>"`): The unknown token. A token that is not in the vocabulary cannot be converted to an ID and is set to be this token instead. pad_token (`str`, *optional*, defaults to `"<pad>"`): The token used for padding, for example when batching sequences of different lengths. mask_token (`str`, *optional*, defaults to `"<mask>"`): The token used for masking values. This is the token used when training this model with masked language modeling. This is the token which the model will try to predict. add_prefix_space (`bool`, *optional*, defaults to `False`): Whether or not to add an initial space to the input. This allows to treat the leading word just as any other word. (RoBERTa tokenizer detect beginning of words by the preceding space). """ vocab_files_names = VOCAB_FILES_NAMES pretrained_vocab_files_map = PRETRAINED_VOCAB_FILES_MAP max_model_input_sizes = PRETRAINED_POSITIONAL_EMBEDDINGS_SIZES slow_tokenizer_class = MarkupLMTokenizer def __init__( self, vocab_file, merges_file, tags_dict, tokenizer_file=None, errors="replace", bos_token="<s>", eos_token="</s>", sep_token="</s>", cls_token="<s>", unk_token="<unk>", pad_token="<pad>", mask_token="<mask>", add_prefix_space=False, max_depth=50, max_width=1000, pad_width=1001, pad_token_label=-100, only_label_first_subword=True, trim_offsets=False, **kwargs, ): bos_token = AddedToken(bos_token, lstrip=False, rstrip=False) if isinstance(bos_token, str) else bos_token eos_token = AddedToken(eos_token, lstrip=False, rstrip=False) if isinstance(eos_token, str) else eos_token sep_token = AddedToken(sep_token, lstrip=False, rstrip=False) if isinstance(sep_token, str) else sep_token cls_token = AddedToken(cls_token, lstrip=False, rstrip=False) if isinstance(cls_token, str) else cls_token unk_token = AddedToken(unk_token, lstrip=False, rstrip=False) if isinstance(unk_token, str) else unk_token pad_token = AddedToken(pad_token, lstrip=False, rstrip=False) if isinstance(pad_token, str) else pad_token # Mask token behave like a normal word, i.e. include the space before it mask_token = AddedToken(mask_token, lstrip=True, rstrip=False) if isinstance(mask_token, str) else mask_token super().__init__( vocab_file=vocab_file, merges_file=merges_file, tags_dict=tags_dict, tokenizer_file=tokenizer_file, errors=errors, bos_token=bos_token, eos_token=eos_token, unk_token=unk_token, sep_token=sep_token, cls_token=cls_token, pad_token=pad_token, mask_token=mask_token, add_prefix_space=add_prefix_space, trim_offsets=trim_offsets, max_depth=max_depth, max_width=max_width, pad_width=pad_width, pad_token_label=pad_token_label, only_label_first_subword=only_label_first_subword, **kwargs, ) if trim_offsets: # Not implemented yet, because we need to chain two post processors which is not possible yet # We need to wait for https://github.com/huggingface/tokenizers/pull/1005 # With `trim_offsets=False` we don't need to do add `processors.ByteLevel(trim_offsets=False)` # because it's not doing anything raise NotImplementedError( "`trim_offsets=True` is not implemented for MarkupLMTokenizerFast. Please set it to False." ) self.tags_dict = tags_dict pre_tok_state = json.loads(self.backend_tokenizer.pre_tokenizer.__getstate__()) if pre_tok_state.get("add_prefix_space", add_prefix_space) != add_prefix_space: pre_tok_class = getattr(pre_tokenizers, pre_tok_state.pop("type")) pre_tok_state["add_prefix_space"] = add_prefix_space self.backend_tokenizer.pre_tokenizer = pre_tok_class(**pre_tok_state) self.add_prefix_space = add_prefix_space tokenizer_component = "post_processor" tokenizer_component_instance = getattr(self.backend_tokenizer, tokenizer_component, None) if tokenizer_component_instance: state = json.loads(tokenizer_component_instance.__getstate__()) # The lists 'sep' and 'cls' must be cased in tuples for the object `post_processor_class` if "sep" in state: state["sep"] = tuple(state["sep"]) if "cls" in state: state["cls"] = tuple(state["cls"]) changes_to_apply = False if state.get("add_prefix_space", add_prefix_space) != add_prefix_space: state["add_prefix_space"] = add_prefix_space changes_to_apply = True if changes_to_apply: component_class = getattr(processors, state.pop("type")) new_value = component_class(**state) setattr(self.backend_tokenizer, tokenizer_component, new_value) # additional properties self.max_depth = max_depth self.max_width = max_width self.pad_width = pad_width self.unk_tag_id = len(self.tags_dict) self.pad_tag_id = self.unk_tag_id + 1 self.pad_xpath_tags_seq = [self.pad_tag_id] * self.max_depth self.pad_xpath_subs_seq = [self.pad_width] * self.max_depth self.pad_token_label = pad_token_label self.only_label_first_subword = only_label_first_subword def get_xpath_seq(self, xpath): """ Given the xpath expression of one particular node (like "/html/body/div/li[1]/div/span[2]"), return a list of tag IDs and corresponding subscripts, taking into account max depth. """ xpath_tags_list = [] xpath_subs_list = [] xpath_units = xpath.split("/") for unit in xpath_units: if not unit.strip(): continue name_subs = unit.strip().split("[") tag_name = name_subs[0] sub = 0 if len(name_subs) == 1 else int(name_subs[1][:-1]) xpath_tags_list.append(self.tags_dict.get(tag_name, self.unk_tag_id)) xpath_subs_list.append(min(self.max_width, sub)) xpath_tags_list = xpath_tags_list[: self.max_depth] xpath_subs_list = xpath_subs_list[: self.max_depth] xpath_tags_list += [self.pad_tag_id] * (self.max_depth - len(xpath_tags_list)) xpath_subs_list += [self.pad_width] * (self.max_depth - len(xpath_subs_list)) return xpath_tags_list, xpath_subs_list @add_end_docstrings(ENCODE_KWARGS_DOCSTRING, MARKUPLM_ENCODE_PLUS_ADDITIONAL_KWARGS_DOCSTRING) def __call__( self, text: Union[TextInput, PreTokenizedInput, List[TextInput], List[PreTokenizedInput]], text_pair: Optional[Union[PreTokenizedInput, List[PreTokenizedInput]]] = None, xpaths: Union[List[List[int]], List[List[List[int]]]] = None, node_labels: Optional[Union[List[int], List[List[int]]]] = None, add_special_tokens: bool = True, padding: Union[bool, str, PaddingStrategy] = False, truncation: Union[bool, str, TruncationStrategy] = None, max_length: Optional[int] = None, stride: int = 0, pad_to_multiple_of: Optional[int] = None, return_tensors: Optional[Union[str, TensorType]] = None, return_token_type_ids: Optional[bool] = None, return_attention_mask: Optional[bool] = None, return_overflowing_tokens: bool = False, return_special_tokens_mask: bool = False, return_offsets_mapping: bool = False, return_length: bool = False, verbose: bool = True, **kwargs, ) -> BatchEncoding: """ Main method to tokenize and prepare for the model one or several sequence(s) or one or several pair(s) of sequences with nodes, xpaths and optional labels. Args: text (`str`, `List[str]`, `List[List[str]]`): The sequence or batch of sequences to be encoded. Each sequence can be a string, a list of strings (words of a single example or questions of a batch of examples) or a list of list of strings (batch of words). text_pair (`List[str]`, `List[List[str]]`): The sequence or batch of sequences to be encoded. Each sequence should be a list of strings (pretokenized string). xpaths (`List[List[int]]`, `List[List[List[int]]]`): Node-level xpaths. Each bounding box should be normalized to be on a 0-1000 scale. node_labels (`List[int]`, `List[List[int]]`, *optional*): Node-level integer labels (for token classification tasks). """ # Input type checking for clearer error def _is_valid_text_input(t): if isinstance(t, str): # Strings are fine return True elif isinstance(t, (list, tuple)): # List are fine as long as they are... if len(t) == 0: # ... empty return True elif isinstance(t[0], str): # ... list of strings return True elif isinstance(t[0], (list, tuple)): # ... list with an empty list or with a list of strings return len(t[0]) == 0 or isinstance(t[0][0], str) else: return False else: return False if text_pair is not None: # in case text + text_pair are provided, text = questions, text_pair = nodes if not _is_valid_text_input(text): raise ValueError("text input must of type `str` (single example) or `List[str]` (batch of examples). ") if not isinstance(text_pair, (list, tuple)): raise ValueError( "Nodes must be of type `List[str]` (single pretokenized example), " "or `List[List[str]]` (batch of pretokenized examples)." ) else: # in case only text is provided => must be nodes if not isinstance(text, (list, tuple)): raise ValueError( "Nodes must be of type `List[str]` (single pretokenized example), " "or `List[List[str]]` (batch of pretokenized examples)." ) if text_pair is not None: is_batched = isinstance(text, (list, tuple)) else: is_batched = isinstance(text, (list, tuple)) and text and isinstance(text[0], (list, tuple)) nodes = text if text_pair is None else text_pair assert xpaths is not None, "You must provide corresponding xpaths" if is_batched: assert len(nodes) == len(xpaths), "You must provide nodes and xpaths for an equal amount of examples" for nodes_example, xpaths_example in zip(nodes, xpaths): assert len(nodes_example) == len(xpaths_example), "You must provide as many nodes as there are xpaths" else: assert len(nodes) == len(xpaths), "You must provide as many nodes as there are xpaths" if is_batched: if text_pair is not None and len(text) != len(text_pair): raise ValueError( f"batch length of `text`: {len(text)} does not match batch length of `text_pair`:" f" {len(text_pair)}." ) batch_text_or_text_pairs = list(zip(text, text_pair)) if text_pair is not None else text is_pair = bool(text_pair is not None) return self.batch_encode_plus( batch_text_or_text_pairs=batch_text_or_text_pairs, is_pair=is_pair, xpaths=xpaths, node_labels=node_labels, add_special_tokens=add_special_tokens, padding=padding, truncation=truncation, max_length=max_length, stride=stride, pad_to_multiple_of=pad_to_multiple_of, return_tensors=return_tensors, return_token_type_ids=return_token_type_ids, return_attention_mask=return_attention_mask, return_overflowing_tokens=return_overflowing_tokens, return_special_tokens_mask=return_special_tokens_mask, return_offsets_mapping=return_offsets_mapping, return_length=return_length, verbose=verbose, **kwargs, ) else: return self.encode_plus( text=text, text_pair=text_pair, xpaths=xpaths, node_labels=node_labels, add_special_tokens=add_special_tokens, padding=padding, truncation=truncation, max_length=max_length, stride=stride, pad_to_multiple_of=pad_to_multiple_of, return_tensors=return_tensors, return_token_type_ids=return_token_type_ids, return_attention_mask=return_attention_mask, return_overflowing_tokens=return_overflowing_tokens, return_special_tokens_mask=return_special_tokens_mask, return_offsets_mapping=return_offsets_mapping, return_length=return_length, verbose=verbose, **kwargs, ) @add_end_docstrings(ENCODE_KWARGS_DOCSTRING, MARKUPLM_ENCODE_PLUS_ADDITIONAL_KWARGS_DOCSTRING) def batch_encode_plus( self, batch_text_or_text_pairs: Union[ List[TextInput], List[TextInputPair], List[PreTokenizedInput], ], is_pair: bool = None, xpaths: Optional[List[List[List[int]]]] = None, node_labels: Optional[Union[List[int], List[List[int]]]] = None, add_special_tokens: bool = True, padding: Union[bool, str, PaddingStrategy] = False, truncation: Union[bool, str, TruncationStrategy] = None, max_length: Optional[int] = None, stride: int = 0, pad_to_multiple_of: Optional[int] = None, return_tensors: Optional[Union[str, TensorType]] = None, return_token_type_ids: Optional[bool] = None, return_attention_mask: Optional[bool] = None, return_overflowing_tokens: bool = False, return_special_tokens_mask: bool = False, return_offsets_mapping: bool = False, return_length: bool = False, verbose: bool = True, **kwargs, ) -> BatchEncoding: # Backward compatibility for 'truncation_strategy', 'pad_to_max_length' padding_strategy, truncation_strategy, max_length, kwargs = self._get_padding_truncation_strategies( padding=padding, truncation=truncation, max_length=max_length, pad_to_multiple_of=pad_to_multiple_of, verbose=verbose, **kwargs, ) return self._batch_encode_plus( batch_text_or_text_pairs=batch_text_or_text_pairs, is_pair=is_pair, xpaths=xpaths, node_labels=node_labels, add_special_tokens=add_special_tokens, padding_strategy=padding_strategy, truncation_strategy=truncation_strategy, max_length=max_length, stride=stride, pad_to_multiple_of=pad_to_multiple_of, return_tensors=return_tensors, return_token_type_ids=return_token_type_ids, return_attention_mask=return_attention_mask, return_overflowing_tokens=return_overflowing_tokens, return_special_tokens_mask=return_special_tokens_mask, return_offsets_mapping=return_offsets_mapping, return_length=return_length, verbose=verbose, **kwargs, ) def tokenize(self, text: str, pair: Optional[str] = None, add_special_tokens: bool = False, **kwargs) -> List[str]: batched_input = [(text, pair)] if pair else [text] encodings = self._tokenizer.encode_batch( batched_input, add_special_tokens=add_special_tokens, is_pretokenized=False, **kwargs ) return encodings[0].tokens @add_end_docstrings(ENCODE_KWARGS_DOCSTRING, MARKUPLM_ENCODE_PLUS_ADDITIONAL_KWARGS_DOCSTRING) def encode_plus( self, text: Union[TextInput, PreTokenizedInput], text_pair: Optional[PreTokenizedInput] = None, xpaths: Optional[List[List[int]]] = None, node_labels: Optional[List[int]] = None, add_special_tokens: bool = True, padding: Union[bool, str, PaddingStrategy] = False, truncation: Union[bool, str, TruncationStrategy] = None, max_length: Optional[int] = None, stride: int = 0, pad_to_multiple_of: Optional[int] = None, return_tensors: Optional[Union[str, TensorType]] = None, return_token_type_ids: Optional[bool] = None, return_attention_mask: Optional[bool] = None, return_overflowing_tokens: bool = False, return_special_tokens_mask: bool = False, return_offsets_mapping: bool = False, return_length: bool = False, verbose: bool = True, **kwargs, ) -> BatchEncoding: """ Tokenize and prepare for the model a sequence or a pair of sequences. .. warning:: This method is deprecated, `__call__` should be used instead. Args: text (`str`, `List[str]`, `List[List[str]]`): The first sequence to be encoded. This can be a string, a list of strings or a list of list of strings. text_pair (`List[str]` or `List[int]`, *optional*): Optional second sequence to be encoded. This can be a list of strings (words of a single example) or a list of list of strings (words of a batch of examples). """ # Backward compatibility for 'truncation_strategy', 'pad_to_max_length' padding_strategy, truncation_strategy, max_length, kwargs = self._get_padding_truncation_strategies( padding=padding, truncation=truncation, max_length=max_length, pad_to_multiple_of=pad_to_multiple_of, verbose=verbose, **kwargs, ) return self._encode_plus( text=text, xpaths=xpaths, text_pair=text_pair, node_labels=node_labels, add_special_tokens=add_special_tokens, padding_strategy=padding_strategy, truncation_strategy=truncation_strategy, max_length=max_length, stride=stride, pad_to_multiple_of=pad_to_multiple_of, return_tensors=return_tensors, return_token_type_ids=return_token_type_ids, return_attention_mask=return_attention_mask, return_overflowing_tokens=return_overflowing_tokens, return_special_tokens_mask=return_special_tokens_mask, return_offsets_mapping=return_offsets_mapping, return_length=return_length, verbose=verbose, **kwargs, ) def _batch_encode_plus( self, batch_text_or_text_pairs: Union[ List[TextInput], List[TextInputPair], List[PreTokenizedInput], ], is_pair: bool = None, xpaths: Optional[List[List[List[int]]]] = None, node_labels: Optional[List[List[int]]] = None, add_special_tokens: bool = True, padding_strategy: PaddingStrategy = PaddingStrategy.DO_NOT_PAD, truncation_strategy: TruncationStrategy = TruncationStrategy.DO_NOT_TRUNCATE, max_length: Optional[int] = None, stride: int = 0, pad_to_multiple_of: Optional[int] = None, return_tensors: Optional[str] = None, return_token_type_ids: Optional[bool] = None, return_attention_mask: Optional[bool] = None, return_overflowing_tokens: bool = False, return_special_tokens_mask: bool = False, return_offsets_mapping: bool = False, return_length: bool = False, verbose: bool = True, ) -> BatchEncoding: if not isinstance(batch_text_or_text_pairs, list): raise TypeError(f"batch_text_or_text_pairs has to be a list (got {type(batch_text_or_text_pairs)})") # Set the truncation and padding strategy and restore the initial configuration self.set_truncation_and_padding( padding_strategy=padding_strategy, truncation_strategy=truncation_strategy, max_length=max_length, stride=stride, pad_to_multiple_of=pad_to_multiple_of, ) if is_pair: batch_text_or_text_pairs = [([text], text_pair) for text, text_pair in batch_text_or_text_pairs] encodings = self._tokenizer.encode_batch( batch_text_or_text_pairs, add_special_tokens=add_special_tokens, is_pretokenized=True, # we set this to True as MarkupLM always expects pretokenized inputs ) # Convert encoding to dict # `Tokens` is a tuple of (List[Dict[str, List[List[int]]]] or List[Dict[str, 2D-Tensor]], # List[EncodingFast]) with nested dimensions corresponding to batch, overflows, sequence length tokens_and_encodings = [ self._convert_encoding( encoding=encoding, return_token_type_ids=return_token_type_ids, return_attention_mask=return_attention_mask, return_overflowing_tokens=return_overflowing_tokens, return_special_tokens_mask=return_special_tokens_mask, return_offsets_mapping=True if node_labels is not None else return_offsets_mapping, # we use offsets to create the labels return_length=return_length, verbose=verbose, ) for encoding in encodings ] # Convert the output to have dict[list] from list[dict] and remove the additional overflows dimension # From (variable) shape (batch, overflows, sequence length) to ~ (batch * overflows, sequence length) # (we say ~ because the number of overflow varies with the example in the batch) # # To match each overflowing sample with the original sample in the batch # we add an overflow_to_sample_mapping array (see below) sanitized_tokens = {} for key in tokens_and_encodings[0][0].keys(): stack = [e for item, _ in tokens_and_encodings for e in item[key]] sanitized_tokens[key] = stack sanitized_encodings = [e for _, item in tokens_and_encodings for e in item] # If returning overflowing tokens, we need to return a mapping # from the batch idx to the original sample if return_overflowing_tokens: overflow_to_sample_mapping = [] for i, (toks, _) in enumerate(tokens_and_encodings): overflow_to_sample_mapping += [i] * len(toks["input_ids"]) sanitized_tokens["overflow_to_sample_mapping"] = overflow_to_sample_mapping for input_ids in sanitized_tokens["input_ids"]: self._eventual_warn_about_too_long_sequence(input_ids, max_length, verbose) # create the token-level xpaths tags and subscripts xpath_tags_seq = [] xpath_subs_seq = [] for batch_index in range(len(sanitized_tokens["input_ids"])): if return_overflowing_tokens: original_index = sanitized_tokens["overflow_to_sample_mapping"][batch_index] else: original_index = batch_index xpath_tags_seq_example = [] xpath_subs_seq_example = [] for id, sequence_id, word_id in zip( sanitized_tokens["input_ids"][batch_index], sanitized_encodings[batch_index].sequence_ids, sanitized_encodings[batch_index].word_ids, ): if word_id is not None: if is_pair and sequence_id == 0: xpath_tags_seq_example.append(self.pad_xpath_tags_seq) xpath_subs_seq_example.append(self.pad_xpath_subs_seq) else: xpath_tags_list, xpath_subs_list = self.get_xpath_seq(xpaths[original_index][word_id]) xpath_tags_seq_example.extend([xpath_tags_list]) xpath_subs_seq_example.extend([xpath_subs_list]) else: if id in [self.cls_token_id, self.sep_token_id, self.pad_token_id]: xpath_tags_seq_example.append(self.pad_xpath_tags_seq) xpath_subs_seq_example.append(self.pad_xpath_subs_seq) else: raise ValueError("Id not recognized") xpath_tags_seq.append(xpath_tags_seq_example) xpath_subs_seq.append(xpath_subs_seq_example) sanitized_tokens["xpath_tags_seq"] = xpath_tags_seq sanitized_tokens["xpath_subs_seq"] = xpath_subs_seq # optionally, create the labels if node_labels is not None: labels = [] for batch_index in range(len(sanitized_tokens["input_ids"])): if return_overflowing_tokens: original_index = sanitized_tokens["overflow_to_sample_mapping"][batch_index] else: original_index = batch_index labels_example = [] for id, offset, word_id in zip( sanitized_tokens["input_ids"][batch_index], sanitized_tokens["offset_mapping"][batch_index], sanitized_encodings[batch_index].word_ids, ): if word_id is not None: if self.only_label_first_subword: if offset[0] == 0: # Use the real label id for the first token of the word, and padding ids for the remaining tokens labels_example.append(node_labels[original_index][word_id]) else: labels_example.append(self.pad_token_label) else: labels_example.append(node_labels[original_index][word_id]) else: labels_example.append(self.pad_token_label) labels.append(labels_example) sanitized_tokens["labels"] = labels # finally, remove offsets if the user didn't want them if not return_offsets_mapping: del sanitized_tokens["offset_mapping"] return BatchEncoding(sanitized_tokens, sanitized_encodings, tensor_type=return_tensors) def _encode_plus( self, text: Union[TextInput, PreTokenizedInput], text_pair: Optional[PreTokenizedInput] = None, xpaths: Optional[List[List[int]]] = None, node_labels: Optional[List[int]] = None, add_special_tokens: bool = True, padding_strategy: PaddingStrategy = PaddingStrategy.DO_NOT_PAD, truncation_strategy: TruncationStrategy = TruncationStrategy.DO_NOT_TRUNCATE, max_length: Optional[int] = None, stride: int = 0, pad_to_multiple_of: Optional[int] = None, return_tensors: Optional[bool] = None, return_token_type_ids: Optional[bool] = None, return_attention_mask: Optional[bool] = None, return_overflowing_tokens: bool = False, return_special_tokens_mask: bool = False, return_offsets_mapping: bool = False, return_length: bool = False, verbose: bool = True, **kwargs, ) -> BatchEncoding: # make it a batched input # 2 options: # 1) only text, in case text must be a list of str # 2) text + text_pair, in which case text = str and text_pair a list of str batched_input = [(text, text_pair)] if text_pair else [text] batched_xpaths = [xpaths] batched_node_labels = [node_labels] if node_labels is not None else None batched_output = self._batch_encode_plus( batched_input, is_pair=bool(text_pair is not None), xpaths=batched_xpaths, node_labels=batched_node_labels, add_special_tokens=add_special_tokens, padding_strategy=padding_strategy, truncation_strategy=truncation_strategy, max_length=max_length, stride=stride, pad_to_multiple_of=pad_to_multiple_of, return_tensors=return_tensors, return_token_type_ids=return_token_type_ids, return_attention_mask=return_attention_mask, return_overflowing_tokens=return_overflowing_tokens, return_special_tokens_mask=return_special_tokens_mask, return_offsets_mapping=return_offsets_mapping, return_length=return_length, verbose=verbose, **kwargs, ) # Return tensor is None, then we can remove the leading batch axis # Overflowing tokens are returned as a batch of output so we keep them in this case if return_tensors is None and not return_overflowing_tokens: batched_output = BatchEncoding( { key: value[0] if len(value) > 0 and isinstance(value[0], list) else value for key, value in batched_output.items() }, batched_output.encodings, ) self._eventual_warn_about_too_long_sequence(batched_output["input_ids"], max_length, verbose) return batched_output def _pad( self, encoded_inputs: Union[Dict[str, EncodedInput], BatchEncoding], max_length: Optional[int] = None, padding_strategy: PaddingStrategy = PaddingStrategy.DO_NOT_PAD, pad_to_multiple_of: Optional[int] = None, return_attention_mask: Optional[bool] = None, ) -> dict: """ Args: Pad encoded inputs (on left/right and up to predefined length or max length in the batch) encoded_inputs: Dictionary of tokenized inputs (`List[int]`) or batch of tokenized inputs (`List[List[int]]`). max_length: maximum length of the returned list and optionally padding length (see below). Will truncate by taking into account the special tokens. padding_strategy: PaddingStrategy to use for padding. - PaddingStrategy.LONGEST Pad to the longest sequence in the batch - PaddingStrategy.MAX_LENGTH: Pad to the max length (default) - PaddingStrategy.DO_NOT_PAD: Do not pad The tokenizer padding sides are defined in self.padding_side: - 'left': pads on the left of the sequences - 'right': pads on the right of the sequences pad_to_multiple_of: (optional) Integer if set will pad the sequence to a multiple of the provided value. This is especially useful to enable the use of Tensor Core on NVIDIA hardware with compute capability `>= 7.5` (Volta). return_attention_mask: (optional) Set to False to avoid returning attention mask (default: set to model specifics) """ # Load from model defaults if return_attention_mask is None: return_attention_mask = "attention_mask" in self.model_input_names required_input = encoded_inputs[self.model_input_names[0]] if padding_strategy == PaddingStrategy.LONGEST: max_length = len(required_input) if max_length is not None and pad_to_multiple_of is not None and (max_length % pad_to_multiple_of != 0): max_length = ((max_length // pad_to_multiple_of) + 1) * pad_to_multiple_of needs_to_be_padded = padding_strategy != PaddingStrategy.DO_NOT_PAD and len(required_input) != max_length # Initialize attention mask if not present. if return_attention_mask and "attention_mask" not in encoded_inputs: encoded_inputs["attention_mask"] = [1] * len(required_input) if needs_to_be_padded: difference = max_length - len(required_input) if self.padding_side == "right": if return_attention_mask: encoded_inputs["attention_mask"] = encoded_inputs["attention_mask"] + [0] * difference if "token_type_ids" in encoded_inputs: encoded_inputs["token_type_ids"] = ( encoded_inputs["token_type_ids"] + [self.pad_token_type_id] * difference ) if "xpath_tags_seq" in encoded_inputs: encoded_inputs["xpath_tags_seq"] = ( encoded_inputs["xpath_tags_seq"] + [self.pad_xpath_tags_seq] * difference ) if "xpath_subs_seq" in encoded_inputs: encoded_inputs["xpath_subs_seq"] = ( encoded_inputs["xpath_subs_seq"] + [self.pad_xpath_subs_seq] * difference ) if "labels" in encoded_inputs: encoded_inputs["labels"] = encoded_inputs["labels"] + [self.pad_token_label] * difference if "special_tokens_mask" in encoded_inputs: encoded_inputs["special_tokens_mask"] = encoded_inputs["special_tokens_mask"] + [1] * difference encoded_inputs[self.model_input_names[0]] = required_input + [self.pad_token_id] * difference elif self.padding_side == "left": if return_attention_mask: encoded_inputs["attention_mask"] = [0] * difference + encoded_inputs["attention_mask"] if "token_type_ids" in encoded_inputs: encoded_inputs["token_type_ids"] = [self.pad_token_type_id] * difference + encoded_inputs[ "token_type_ids" ] if "xpath_tags_seq" in encoded_inputs: encoded_inputs["xpath_tags_seq"] = [self.pad_xpath_tags_seq] * difference + encoded_inputs[ "xpath_tags_seq" ] if "xpath_subs_seq" in encoded_inputs: encoded_inputs["xpath_subs_seq"] = [self.pad_xpath_subs_seq] * difference + encoded_inputs[ "xpath_subs_seq" ] if "labels" in encoded_inputs: encoded_inputs["labels"] = [self.pad_token_label] * difference + encoded_inputs["labels"] if "special_tokens_mask" in encoded_inputs: encoded_inputs["special_tokens_mask"] = [1] * difference + encoded_inputs["special_tokens_mask"] encoded_inputs[self.model_input_names[0]] = [self.pad_token_id] * difference + required_input else: raise ValueError("Invalid padding strategy:" + str(self.padding_side)) return encoded_inputs def build_inputs_with_special_tokens( self, token_ids_0: List[int], token_ids_1: Optional[List[int]] = None ) -> List[int]: """ Build model inputs from a sequence or a pair of sequence for sequence classification tasks by concatenating and adding special tokens. A RoBERTa sequence has the following format: - single sequence: `<s> X </s>` - pair of sequences: `<s> A </s></s> B </s>` Args: token_ids_0 (`List[int]`): List of IDs to which the special tokens will be added. token_ids_1 (`List[int]`, *optional*): Optional second list of IDs for sequence pairs. Returns: `List[int]`: List of [input IDs](../glossary#input-ids) with the appropriate special tokens. """ if token_ids_1 is None: return [self.cls_token_id] + token_ids_0 + [self.sep_token_id] cls = [self.cls_token_id] sep = [self.sep_token_id] return cls + token_ids_0 + sep + token_ids_1 + sep def create_token_type_ids_from_sequences( self, token_ids_0: List[int], token_ids_1: Optional[List[int]] = None ) -> List[int]: """ Create a mask from the two sequences passed to be used in a sequence-pair classification task. RoBERTa does not make use of token type ids, therefore a list of zeros is returned. Args: token_ids_0 (`List[int]`): List of IDs. token_ids_1 (`List[int]`, *optional*): Optional second list of IDs for sequence pairs. Returns: `List[int]`: List of zeros. """ sep = [self.sep_token_id] cls = [self.cls_token_id] if token_ids_1 is None: return len(cls + token_ids_0 + sep) * [0] return len(cls + token_ids_0 + sep + token_ids_1 + sep) * [0] def save_vocabulary(self, save_directory: str, filename_prefix: Optional[str] = None) -> Tuple[str]: files = self._tokenizer.model.save(save_directory, name=filename_prefix) return tuple(files)

transformers/src/transformers/models/markuplm/tokenization_markuplm_fast.py/0

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# coding=utf-8 # Copyright 2022 The HuggingFace Inc. team. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. """Convert MobileNetV1 checkpoints from the tensorflow/models library.""" import argparse import json import re from pathlib import Path import requests import torch from huggingface_hub import hf_hub_download from PIL import Image from transformers import ( MobileNetV1Config, MobileNetV1ForImageClassification, MobileNetV1ImageProcessor, load_tf_weights_in_mobilenet_v1, ) from transformers.utils import logging logging.set_verbosity_info() logger = logging.get_logger(__name__) def get_mobilenet_v1_config(model_name): config = MobileNetV1Config(layer_norm_eps=0.001) if "_quant" in model_name: raise ValueError("Quantized models are not supported.") matches = re.match(r"^mobilenet_v1_([^_]*)_([^_]*)$", model_name) if matches: config.depth_multiplier = float(matches[1]) config.image_size = int(matches[2]) # The TensorFlow version of MobileNetV1 predicts 1001 classes instead of # the usual 1000. The first class (index 0) is "background". config.num_labels = 1001 filename = "imagenet-1k-id2label.json" repo_id = "huggingface/label-files" id2label = json.load(open(hf_hub_download(repo_id, filename, repo_type="dataset"), "r")) id2label = {int(k) + 1: v for k, v in id2label.items()} id2label[0] = "background" config.id2label = id2label config.label2id = {v: k for k, v in id2label.items()} return config # We will verify our results on an image of cute cats def prepare_img(): url = "http://images.cocodataset.org/val2017/000000039769.jpg" im = Image.open(requests.get(url, stream=True).raw) return im @torch.no_grad() def convert_movilevit_checkpoint(model_name, checkpoint_path, pytorch_dump_folder_path, push_to_hub=False): """ Copy/paste/tweak model's weights to our MobileNetV1 structure. """ config = get_mobilenet_v1_config(model_name) # Load 🤗 model model = MobileNetV1ForImageClassification(config).eval() # Load weights from TensorFlow checkpoint load_tf_weights_in_mobilenet_v1(model, config, checkpoint_path) # Check outputs on an image, prepared by MobileNetV1ImageProcessor image_processor = MobileNetV1ImageProcessor( crop_size={"width": config.image_size, "height": config.image_size}, size={"shortest_edge": config.image_size + 32}, ) encoding = image_processor(images=prepare_img(), return_tensors="pt") outputs = model(**encoding) logits = outputs.logits assert logits.shape == (1, 1001) if model_name == "mobilenet_v1_1.0_224": expected_logits = torch.tensor([-4.1739, -1.1233, 3.1205]) elif model_name == "mobilenet_v1_0.75_192": expected_logits = torch.tensor([-3.9440, -2.3141, -0.3333]) else: expected_logits = None if expected_logits is not None: assert torch.allclose(logits[0, :3], expected_logits, atol=1e-4) Path(pytorch_dump_folder_path).mkdir(exist_ok=True) print(f"Saving model {model_name} to {pytorch_dump_folder_path}") model.save_pretrained(pytorch_dump_folder_path) print(f"Saving image processor to {pytorch_dump_folder_path}") image_processor.save_pretrained(pytorch_dump_folder_path) if push_to_hub: print("Pushing to the hub...") repo_id = "google/" + model_name image_processor.push_to_hub(repo_id) model.push_to_hub(repo_id) if __name__ == "__main__": parser = argparse.ArgumentParser() # Required parameters parser.add_argument( "--model_name", default="mobilenet_v1_1.0_224", type=str, help="Name of the MobileNetV1 model you'd like to convert. Should in the form 'mobilenet_v1_<depth>_<size>'.", ) parser.add_argument( "--checkpoint_path", required=True, type=str, help="Path to the original TensorFlow checkpoint (.ckpt file)." ) parser.add_argument( "--pytorch_dump_folder_path", required=True, type=str, help="Path to the output PyTorch model directory." ) parser.add_argument( "--push_to_hub", action="store_true", help="Whether or not to push the converted model to the 🤗 hub." ) args = parser.parse_args() convert_movilevit_checkpoint( args.model_name, args.checkpoint_path, args.pytorch_dump_folder_path, args.push_to_hub )

transformers/src/transformers/models/mobilenet_v1/convert_original_tf_checkpoint_to_pytorch.py/0

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