Summary:
There is a module called `2to3` which you can target for future specifically to remove these, the directory of `caffe2` has the most redundant imports:
```2to3 -f future -w caffe2```
Pull Request resolved: https://github.com/pytorch/pytorch/pull/45033
Reviewed By: seemethere
Differential Revision: D23808648
Pulled By: bugra
fbshipit-source-id: 38971900f0fe43ab44a9168e57f2307580d36a38
Summary: Added function _RunComparison to data_parallel_model that checks if all shards in a given rendevous have the same value for a given blob_name
Reviewed By: wesolwsk
Differential Revision: D5394164
fbshipit-source-id: c2b07d0f8d5846fa9887d53b0be091a8c057f106