F822 (flake8): Type-only definitions in stubs and __all__
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Description
I am not sure if this is something that should be fixed in pyflakes as it only concerns stub files and is a genuine error in Python files. Please consider:
__all__ = ["foo"]
foo: int
This reports undefined name 'foo' in __all__. This is true at runtime, although this example is still useful for stubs. (flake8 3.7.9, pyflakes 2.1.1)
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Research direction
Start by reproducing the reported snippet with pyflakes and then trace how all and annotated names are checked. Determine whether stub-file handling should change without suppressing the genuine runtime error in regular Python files; done means the intended case is handled and existing behavior remains covered by tests.
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Assessment
- Tech stack
- python
- Domain
- tooling
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100