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gh-113157: Document and test __get__ for MethodType (gh-115492)

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Raymond Hettinger 2024-02-20 01:53:25 -06:00 committed by GitHub
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1 changed files with 18 additions and 2 deletions
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Doc/howto/descriptor.rst
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@ -1192,6 +1192,10 @@ roughly equivalent to:
"Emulate method_getattro() in Objects/classobject.c"
return getattr(self.__func__, name)
def __get__(self, obj, objtype=None):
"Emulate method_descr_get() in Objects/classobject.c"
return self
To support automatic creation of methods, functions include the
:meth:`__get__` method for binding methods during attribute access. This
means that functions are non-data descriptors that return bound methods
@ -1214,8 +1218,20 @@ descriptor works in practice:
.. testcode::
class D:
def f(self, x):
return x
def f(self):
return self
class D2:
pass
.. doctest::
:hide:
>>> d = D()
>>> d2 = D2()
>>> d2.f = d.f.__get__(d2, D2)
>>> d2.f() is d
True
The function has a :term:`qualified name` attribute to support introspection: