pylint-errors

E1129 (not-context-manager)

Problematic code:

class Ctx:
    def __enter__(self):
        pass


with Ctx() as ctx:
    pass

Correct code:

class Ctx:
    def __enter__(self):
        pass

    def __exit__(self, *exc):
        pass


with Ctx() as ctx:
    pass

Rationale:

Used when an instance in a with statement doesn’t implement the context manager protocol(__enter__/__exit__).

Related resources:

• Issue Tracker

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