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| import torch, math | |
| from datasets.load import load_dataset, load_metric | |
| from transformers import ( | |
| AutoTokenizer, | |
| EvalPrediction, | |
| default_data_collator, | |
| ) | |
| import os, hashlib | |
| import numpy as np | |
| import logging, copy, re | |
| from datasets.formatting.formatting import LazyRow, LazyBatch | |
| task_to_keys = { | |
| "imdb": ("text", None) | |
| } | |
| logger = logging.getLogger(__name__) | |
| idx = 0 | |
| class IMDBDataset(): | |
| def __init__(self, tokenizer: AutoTokenizer, data_args, training_args) -> None: | |
| super().__init__() | |
| self.data_args = data_args | |
| self.training_args = training_args | |
| self.tokenizer = tokenizer | |
| self.is_regression = False | |
| raw_datasets = load_dataset("imdb") | |
| self.label_list = raw_datasets["train"].features["label"].names | |
| self.num_labels = len(self.label_list) | |
| # Preprocessing the raw_datasets | |
| self.sentence1_key, self.sentence2_key = task_to_keys[data_args.dataset_name] | |
| sc_template = f'''{'{' + self.sentence1_key + '}'}''' \ | |
| if self.sentence2_key is None else f'''{'{' + self.sentence1_key + '}'}</s></s>{'{' + self.sentence2_key + '}'}''' | |
| self.tokenizer.template = self.template = [sc_template] | |
| print(f"-> using template:{self.template}") | |
| # Padding strategy | |
| if data_args.pad_to_max_length: | |
| self.padding = "max_length" | |
| else: | |
| # We will pad later, dynamically at batch creation, to the max sequence length in each batch | |
| self.padding = False | |
| # Some models have set the order of the labels to use, so let's make sure we do use it. | |
| if not self.is_regression: | |
| self.label2id = {l: i for i, l in enumerate(self.label_list)} | |
| self.id2label = {id: label for label, id in self.label2id.items()} | |
| 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}." | |
| ) | |
| self.max_seq_length = min(data_args.max_seq_length, tokenizer.model_max_length) | |
| if self.data_args.max_seq_length > tokenizer.model_max_length: | |
| logger.warning( | |
| f"The max_seq_length passed ({self.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}." | |
| ) | |
| self.max_seq_length = min(self.data_args.max_seq_length, tokenizer.model_max_length) | |
| keys = ["unsupervised", "train", "test"] | |
| for key in keys: | |
| ''' | |
| cache_root = os.path.dirname(raw_datasets[key].cache_files[0]["filename"]) | |
| digest = hashlib.md5(str(tokenizer.prompt_template + tokenizer.key_template).encode("utf-8")).hexdigest() | |
| filename = f"{tokenizer.name_or_path}_{key}_{digest[:16]}.arrow".replace("/", "_") | |
| print(f"-> template:{tokenizer.prompt_template} filename:{filename}") | |
| cache_file_name = os.path.join(cache_root, filename) | |
| ''' | |
| raw_datasets[key] = raw_datasets[key].map( | |
| self.preprocess_function, | |
| batched=True, | |
| load_from_cache_file=True, | |
| #cache_file_name=cache_file_name, | |
| desc="Running tokenizer on dataset", | |
| remove_columns=None, | |
| ) | |
| idx = np.arange(len(raw_datasets[key])).tolist() | |
| raw_datasets[key] = raw_datasets[key].add_column("idx", idx) | |
| self.train_dataset = raw_datasets["train"] | |
| if self.data_args.max_train_samples is not None: | |
| self.data_args.max_train_samples = min(self.data_args.max_train_samples, len(self.train_dataset)) | |
| self.train_dataset = self.train_dataset.select(range(self.data_args.max_train_samples)) | |
| size = len(self.train_dataset) | |
| select = np.random.choice(size, math.ceil(size * training_args.poison_rate), replace=False) | |
| idx = torch.zeros([size]) | |
| idx[select] = 1 | |
| self.train_dataset.poison_idx = idx | |
| self.eval_dataset = raw_datasets["test"] | |
| if self.data_args.max_eval_samples is not None: | |
| self.data_args.max_eval_samples = min(self.data_args.max_eval_samples, len(self.eval_dataset)) | |
| self.eval_dataset = self.eval_dataset.select(range(self.data_args.max_eval_samples)) | |
| self.predict_dataset = raw_datasets["unsupervised"] | |
| if self.data_args.max_predict_samples is not None: | |
| self.predict_dataset = self.predict_dataset.select(range(self.data_args.max_predict_samples)) | |
| self.metric = load_metric("glue", "sst2") | |
| self.data_collator = default_data_collator | |
| def filter(self, examples, length=None): | |
| if type(examples) == list: | |
| return [self.filter(x, length) for x in examples] | |
| elif type(examples) == dict or type(examples) == LazyRow or type(examples) == LazyBatch: | |
| return {k: self.filter(v, length) for k, v in examples.items()} | |
| elif type(examples) == str: | |
| # txt = re.sub(r"[^a-zA-Z0-9\ \%#!.,]+", '', examples) | |
| txt = examples.replace(self.tokenizer.prompt_token, "T").replace(self.tokenizer.skey_token, "K").replace( | |
| self.tokenizer.predict_token, "P").replace("[X]", "Y").replace("[Y]", "Y") | |
| if length is not None: | |
| return txt[:length] | |
| return txt | |
| return examples | |
| def preprocess_function(self, examples, **kwargs): | |
| examples = self.filter(examples, length=300) | |
| # Tokenize the texts, args = [text1, text2, ...] | |
| _examples = copy.deepcopy(examples) | |
| args = ( | |
| (_examples[self.sentence1_key],) if self.sentence2_key is None else ( | |
| _examples[self.sentence1_key], _examples[self.sentence2_key]) | |
| ) | |
| result = self.tokenizer(*args, padding=self.padding, max_length=self.max_seq_length, truncation=True) | |
| return result | |
| def compute_metrics(self, p: EvalPrediction): | |
| preds = p.predictions[0] if isinstance(p.predictions, tuple) else p.predictions | |
| preds = np.argmax(preds, axis=1) | |
| return {"accuracy": (preds == p.label_ids).astype(np.float32).mean().item()} |