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Issue 2235: __hash__ is once again inherited by default, but inheritance can be blocked explicitly so that collections.Hashable remains meaningful

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This commit is contained in:
Nick Coghlan 2008-07-15 14:27:37 +00:00
parent 9ace15ca25
commit 53663a695e
14 changed files with 134 additions and 134 deletions
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8
Lib/test/test_descr.py
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@ -3283,12 +3283,20 @@ order (MRO) for bases """
self.assertEqual(hash(d), 144)
D.__hash__ = lambda self: 100
self.assertEqual(hash(d), 100)
D.__hash__ = None
self.assertRaises(TypeError, hash, d)
del D.__hash__
self.assertEqual(hash(d), 144)
B.__hash__ = None
self.assertRaises(TypeError, hash, d)
del B.__hash__
self.assertEqual(hash(d), 314)
C.__hash__ = None
self.assertRaises(TypeError, hash, d)
del C.__hash__
self.assertEqual(hash(d), 42)
A.__hash__ = None
self.assertRaises(TypeError, hash, d)
del A.__hash__
self.assertEqual(hash(d), orig_hash)
d.foo = 42