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GH-89519: Deprecate classmethod descriptor chaining (#92379)

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Raymond Hettinger 2022-05-06 02:57:53 -05:00 • committed by GitHub
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commit ebaf0945f9
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Doc/howto/descriptor.rst
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@ -1349,6 +1349,8 @@ Using the non-data descriptor protocol, a pure Python version of
if cls is None:
cls = type(obj)
if hasattr(type(self.f), '__get__'):
# This code path was added in Python 3.9
# and was deprecated in Python 3.11.
return self.f.__get__(cls, cls)
return MethodType(self.f, cls)
@ -1386,7 +1388,7 @@ Using the non-data descriptor protocol, a pure Python version of
The code path for ``hasattr(type(self.f), '__get__')`` was added in
Python 3.9 and makes it possible for :func:`classmethod` to support
chained decorators. For example, a classmethod and property could be
chained together:
chained together. In Python 3.11, this functionality was deprecated.
.. testcode::