pytorch

81b9aa74 - [pytorch] Update caffe2/python to eliminate Pyre errors (#52083)

[pytorch] Update caffe2/python to eliminate Pyre errors (#52083) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/52083 This makes minor fixes in `caffe2/python` to address all errors currently reported by Pyre. I update the code to fix errors when doing so looked simple and safe, and added `pyre-fixme` comments in other places. ghstack-source-id: 121109695 Test Plan: Confirmed that Pyre no longer reports errors under `caffe2/python` Differential Revision: D26272279 fbshipit-source-id: b1eb19d323b613f23280ce9c71e800e874ca1162