Override print when python is present (#21625)
Summary:
This makes it so we can see the output of prim::Print in environments like iPython notebooks which override sys.stdout
Pull Request resolved: https://github.com/pytorch/pytorch/pull/21625
Differential Revision: D15756793
Pulled By: jamesr66a
fbshipit-source-id: 7d9a14b2e229ed358e784318e9d862677db2c461
