PY3.E1129

Not context manager

Used when an instance in a with statement doesn't implement the context manager protocol( enter / exit ).

Noncompliant Code:

コピー

class Ctx:
    def __enter__(self):
        pass
with Ctx() as ctx:
    pass

Compliant Code:

コピー

class Ctx:
    def __enter__(self):
        pass

    def __exit__(self, *exc):
        pass
with Ctx() as ctx:
    pass

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