Thanks @jamesjuett . Do you have a reference for that?
It seems, in practice, os.errno still works because our tests are passing.

Fair question! I've tracked down an authoritative source:

https://github.com/python/cpython/blob/main/Doc/whatsnew/3.7.rst#changes-in-the-python-api

(Near the bottom of the list, or just search for "errno".)

Thanks for that reference. If you can fix the lint error (import order) then this is good to go.

Ah yeah, my bad on the import ordering - fixed!

(Note on the force push...I'm on WSL and have issues with clock drift when my machine hibernates. The force push was after I realized my commit to fix the lint issue was showing up as several days ago.)

Awesome. Thanks for the fix!