Pyright: Support features about export (__all__)

[jeongukjae]

Is your feature request related to a problem? Please describe.
A clear and concise description of the problem.

from .some_packages import some_function

__all__ = ["some_function"]

I think above code should not raise any warnings nor errors, but pyright 1.0.53 raises an error like error: Import 'some_function' is not accessed.

A static analyzer may not fully support this feature because value of __all__ can be dynamic. But it would be much better if pyright supports this feature even though partially.

[erictraut]

Thanks for the suggestion. This will be included in the next version of pyright.

[giyyapan]

https://github.com/microsoft/python-language-server/issues/619

FYI, python-language-server removed support of __all__ for reason:

commonly used libraries are using it in ways we can't handle yet.

Not sure what's those libraries and how they can't handle.

[erictraut]

Yeah, I'm not planning to honor __all__ in terms of import mechanics, but I think it's reasonable to mark the referenced symbols as "accessed" so pyright doesn't report them as unaccessed.

[giyyapan]

Fair point.

Didn't read the issue description clearly enough and thought those two issue were simillar.

[erictraut]

This support is included in 1.0.54, which I just published.

[jeongukjae]

I installed new version and checked it working well!! Thank you for maintaining this amazing project!