unsupported-method-call-on-all (PYI056)

Derived from the flake8-pyi linter.

What it does

Checks that append, extend and remove methods are not called on __all__.

Why is this bad?

Different type checkers have varying levels of support for calling these methods on __all__. Instead, use the += operator to add items to __all__, which is known to be supported by all major type checkers.

Example

__all__ = ["A"]
__all__.append("B")

Use instead:

__all__ = ["A"]
__all__ += ["B"]