Fixed type checking errors in node.py (#68124)
Summary:
Fixes [issue#67](https://github.com/MLH-Fellowship/pyre-check/issues/67)
This PR fixes the type checking errors in Pytorch torch/fx/node.py .
The variable types in 363:20 and 364:20 were declared to have type `List[str]` but were assigned a value of `None`. This caused an incompatitble variable type error. I changed the type from `List[str]` to `Optional[List[str]` . This therefore fixed the incompatitble variable type error.
Signed-off-by: Onyemowo Agbo
onionymous
0xedward
Pull Request resolved: https://github.com/pytorch/pytorch/pull/68124
Reviewed By: gmagogsfm
Differential Revision: D32322414
Pulled By: onionymous
fbshipit-source-id: be11bbbd463715ddf28a5ba78fb4adbf62878c80
