对于mmaction2工具箱，猜测这个RepeatDataset类大概率是在MMEngine包里面。找到路径：miniconda3/envs/openmmlab/lib/python3.8/site-packages/mmengine/dataset/dataset_wrapper.py果然发现RepeatDataset类放到了mmengine包里面 pyskl/configs/rgbpose_conv3d/rgb_o