pytorch

b1215060 - [fx] make const fold code more pythonic (#64451)

[fx] make const fold code more pythonic (#64451) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/64451 No functional change. Test Plan: ``` buck test caffe2/test:fx_const_fold ``` Reviewed By: jfix71, RoshanPAN, houseroad Differential Revision: D30718255 fbshipit-source-id: 95f98561c7f33fcc6c839db68683c85eb152c949