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bpo-43682: @staticmethod inherits attributes (GH-25268)

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Static methods (@staticmethod) and class methods (@classmethod) now
inherit the method attributes (__module__, __name__, __qualname__,
__doc__, __annotations__) and have a new __wrapped__ attribute.

Changes:

* Add a repr() method to staticmethod and classmethod types.
* Add tests on the @classmethod decorator.
This commit is contained in:
Victor Stinner 2021-04-09 17:51:22 +02:00 • committed by GitHub
parent 150af75432
commit 507a574de3
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8 changed files with 133 additions and 22 deletions
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18
Lib/test/test_descr.py
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@ -1545,7 +1545,9 @@ order (MRO) for bases """
self.assertEqual(d.foo(1), (d, 1))
self.assertEqual(D.foo(d, 1), (d, 1))
# Test for a specific crash (SF bug 528132)
def f(cls, arg): return (cls, arg)
def f(cls, arg):
"f docstring"
return (cls, arg)
ff = classmethod(f)
self.assertEqual(ff.__get__(0, int)(42), (int, 42))
self.assertEqual(ff.__get__(0)(42), (int, 42))
@ -1571,10 +1573,16 @@ order (MRO) for bases """
self.fail("classmethod shouldn't accept keyword args")
cm = classmethod(f)
self.assertEqual(cm.__dict__, {})
cm_dict = {'__annotations__': {},
'__doc__': "f docstring",
'__module__': __name__,
'__name__': 'f',
'__qualname__': f.__qualname__}
self.assertEqual(cm.__dict__, cm_dict)
cm.x = 42
self.assertEqual(cm.x, 42)
self.assertEqual(cm.__dict__, {"x" : 42})
self.assertEqual(cm.__dict__, {"x" : 42, **cm_dict})
del cm.x
self.assertNotHasAttr(cm, "x")
@ -1654,10 +1662,10 @@ order (MRO) for bases """
self.assertEqual(d.foo(1), (d, 1))
self.assertEqual(D.foo(d, 1), (d, 1))
sm = staticmethod(None)
self.assertEqual(sm.__dict__, {})
self.assertEqual(sm.__dict__, {'__doc__': None})
sm.x = 42
self.assertEqual(sm.x, 42)
self.assertEqual(sm.__dict__, {"x" : 42})
self.assertEqual(sm.__dict__, {"x" : 42, '__doc__': None})
del sm.x
self.assertNotHasAttr(sm, "x")