caffe2 - Expose tensor filler util to Python (#18886)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/18886
Expose tensor filler util to Python and add a unit test (both C++/Python)
Reviewed By: salexspb
Differential Revision: D14784470
fbshipit-source-id: bb8e013d1755c27c166e87d5a8491a97c65d3d8d
