--- a
+++ b/mmaction/datasets/__init__.py
@@ -0,0 +1,28 @@
+# Copyright (c) OpenMMLab. All rights reserved.
+from .activitynet_dataset import ActivityNetDataset
+from .audio_dataset import AudioDataset
+from .audio_feature_dataset import AudioFeatureDataset
+from .audio_visual_dataset import AudioVisualDataset
+from .ava_dataset import AVADataset
+from .base import BaseDataset
+from .blending_utils import (BaseMiniBatchBlending, CutmixBlending,
+                             MixupBlending)
+from .builder import (BLENDINGS, DATASETS, PIPELINES, build_dataloader,
+                      build_dataset)
+from .dataset_wrappers import ConcatDataset, RepeatDataset
+from .hvu_dataset import HVUDataset
+from .image_dataset import ImageDataset
+from .pose_dataset import PoseDataset
+from .rawframe_dataset import RawframeDataset
+from .rawvideo_dataset import RawVideoDataset
+from .ssn_dataset import SSNDataset
+from .video_dataset import VideoDataset
+
+__all__ = [
+    'VideoDataset', 'build_dataloader', 'build_dataset', 'RepeatDataset',
+    'RawframeDataset', 'BaseDataset', 'ActivityNetDataset', 'SSNDataset',
+    'HVUDataset', 'AudioDataset', 'AudioFeatureDataset', 'ImageDataset',
+    'RawVideoDataset', 'AVADataset', 'AudioVisualDataset',
+    'BaseMiniBatchBlending', 'CutmixBlending', 'MixupBlending', 'DATASETS',
+    'PIPELINES', 'BLENDINGS', 'PoseDataset', 'ConcatDataset'
+]