Jelle Zijlstra 57161aac5e bpo-30266: support "= None" pattern in AbstractContextManager (#1448) ...

contextlib.AbstractContextManager now supports anti-registration
by setting __enter__ = None or __exit__ = None, following the pattern
introduced in bpo-25958.

2017-06-09 08:21:47 -07:00

16 KiB

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