Create test_dataset.py

test_dataset.py

@@ -0,0 +1,94 @@
+# coding=utf-8
+# Copyright 2021 The HuggingFace Datasets Authors and the current dataset script contributor.
+#
+# 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.
+"""chensu test animal classification dataset with images of cats and dogs"""
+
+import os
+
+import datasets
+from datasets import load_dataset
+from datasets.tasks import ImageClassification
+
+
+_HOMEPAGE = "https://oss.console.aliyun.com/bucket/oss-cn-beijing/340788/object"
+
+_CITATION = """\
+@ONLINE {
+    author="chensu"
+}
+"""
+
+_DESCRIPTION = """\
+This is a test dataset used to demonstrate the process of creating a hugging face dataset
+"""
+
+_URL = "https://340788.oss-cn-beijing.aliyuncs.com/animal%20classification.zip"
+
+_NAMES = ["cat", "dog"]
+
+
+class TestDataset(datasets.GeneratorBasedBuilder):
+    """Test classification dataset."""
+    VERSION = datasets.Version("1.1.0")
+    BUILDER_CONFIGS = [
+        datasets.BuilderConfig(name="cat", version=VERSION,
+                               description="This part of my cat dataset"),
+        datasets.BuilderConfig(name="dog", version=VERSION,
+                               description="This part of my dog dataset"),
+    ]
+
+    def _info(self):
+        return datasets.DatasetInfo(
+            description=_DESCRIPTION,
+            features=datasets.Features(
+                {
+                    "image_file_path": datasets.Value("string"),
+                    "image": datasets.Image(),
+                    "labels": datasets.features.ClassLabel(names=_NAMES),
+                }
+            ),
+            supervised_keys=("image", "labels"),
+            homepage=_HOMEPAGE,
+            citation=_CITATION,
+            task_templates=[ImageClassification(image_column="image", label_column="labels")],
+        )
+
+    def _split_generators(self, dl_manager):
+        data_dir = dl_manager.download_and_extract(_URL)
+        sub_set = self.config.name
+        return [
+            datasets.SplitGenerator(
+                name=datasets.Split.TRAIN,
+                gen_kwargs={
+                    "files": dl_manager.iter_files(os.path.join(data_dir, sub_set, "train")), # oss://.../cat/train
+                },
+            ),
+            datasets.SplitGenerator(
+                name=datasets.Split.TEST,
+                gen_kwargs={
+                    "files": dl_manager.iter_files(os.path.join(data_dir, sub_set, "test")),# oss://.../cat/test
+                },
+            ),
+        ]
+
+
+    def _generate_examples(self, files):
+        for i, path in enumerate(files):
+            file_name = os.path.basename(path)
+            if file_name.endswith(".jpeg"):
+                yield i, {
+                    "image_file_path": path,
+                    "image": path,
+                    "labels": os.path.basename(os.path.dirname(path)).lower(),
+                }