Fix pkg_resource functions

[Dreamsorcerer]

These functions are actually bound methods from working_set.

Any differences in the signatures (e.g. Sequence[str] in require() are bugs.

[Dreamsorcerer]

Hmm, seems pytype doesn't recognise the working_set declaration on the line before. But, it works fine with Mypy.

Any ideas how to define this in a way compatible with pytype?

Similarly, flake8 is probably ignoring the declaration as there is no assignment operator. I think that's just because the tool was written to lint implementation code, rather than stubs.

[hauntsaninja]

Unfortunately, I don't think pytype supports bound methods. This came up in #4282 (comment) as well.
You could probably placate flake8 by using x: y = ..., though.

[Dreamsorcerer]

Yep, does that mean I need to revert back and just copy/paste the fixed annotations?

[hauntsaninja]

Yes, although I filed google/pytype#761. @rchen152 is super responsive, so maybe not too long from now it'll work :-)

[Dreamsorcerer]

Will close this in the meantime.