pytorch

841a7f51 - [DataPipe] apply dill serialization for _Demux and add cache to traverse

[DataPipe] apply dill serialization for _Demux and add cache to traverse - Fix _Demux can not be pickled with DILL presented https://github.com/pytorch/pytorch/pull/74958#issuecomment-1084637227 - And add cache to traverse function to prevent infinite recursion for circular reference of DataPipe (Fixes https://github.com/pytorch/data/issues/237) Pull Request resolved: https://github.com/pytorch/pytorch/pull/75034 Approved by: https://github.com/wenleix