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Code Issues Projects Releases Packages Wiki Activity Actions 17

bpo-30266: support "= None" pattern in AbstractContextManager (#1448)

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contextlib.AbstractContextManager now supports anti-registration
by setting __enter__ = None or __exit__ = None, following the pattern
introduced in bpo-25958.
This commit is contained in:
Jelle Zijlstra 2017-06-09 08:21:47 -07:00 • committed by Guido van Rossum
parent 3b5cf85edc
commit 57161aac5e
3 changed files with 16 additions and 3 deletions
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10
Lib/test/test_contextlib.py
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@ -44,6 +44,16 @@ class TestAbstractContextManager(unittest.TestCase):
self.assertTrue(issubclass(DefaultEnter, AbstractContextManager))
class NoEnter(ManagerFromScratch):
__enter__ = None
self.assertFalse(issubclass(NoEnter, AbstractContextManager))
class NoExit(ManagerFromScratch):
__exit__ = None
self.assertFalse(issubclass(NoExit, AbstractContextManager))
class ContextManagerTestCase(unittest.TestCase):