invalid-all-format (PLE0605)

Derived from the Pylint linter.

What it does

Checks for invalid assignments to __all__.

Why is this bad?

In Python, __all__ should contain a sequence of strings that represent the names of all "public" symbols exported by a module.

Assigning anything other than a tuple or list of strings to __all__ is invalid.

Example

__all__ = "Foo"

Use instead:

__all__ = ("Foo",)

References

• Python documentation: The import statement