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gh-138010: Fix __init_subclass__ forwarding by warnings.deprecated (#138210)

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Brian Schubert
2025-09-05 16:44:50 -04:00
committed by GitHub
parent 8ed1d53e62
commit e2c038f5be
3 changed files with 36 additions and 13 deletions
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26
Lib/_py_warnings.py
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@@ -765,27 +765,27 @@ class deprecated:
arg.__new__ = staticmethod(__new__)
original_init_subclass = arg.__init_subclass__
# We need slightly different behavior if __init_subclass__
# is a bound method (likely if it was implemented in Python)
if isinstance(original_init_subclass, MethodType):
original_init_subclass = original_init_subclass.__func__
if "__init_subclass__" in arg.__dict__:
# __init_subclass__ is directly present on the decorated class.
# Synthesize a wrapper that calls this method directly.
original_init_subclass = arg.__init_subclass__
# We need slightly different behavior if __init_subclass__
# is a bound method (likely if it was implemented in Python).
# Otherwise, it likely means it's a builtin such as
# object's implementation of __init_subclass__.
if isinstance(original_init_subclass, MethodType):
original_init_subclass = original_init_subclass.__func__
@functools.wraps(original_init_subclass)
def __init_subclass__(*args, **kwargs):
_wm.warn(msg, category=category, stacklevel=stacklevel + 1)
return original_init_subclass(*args, **kwargs)
arg.__init_subclass__ = classmethod(__init_subclass__)
# Or otherwise, which likely means it's a builtin such as
# object's implementation of __init_subclass__.
else:
@functools.wraps(original_init_subclass)
def __init_subclass__(*args, **kwargs):
def __init_subclass__(cls, *args, **kwargs):
_wm.warn(msg, category=category, stacklevel=stacklevel + 1)
return original_init_subclass(*args, **kwargs)
return super(arg, cls).__init_subclass__(*args, **kwargs)
arg.__init_subclass__ = __init_subclass__
arg.__init_subclass__ = classmethod(__init_subclass__)
arg.__deprecated__ = __new__.__deprecated__ = msg
__init_subclass__.__deprecated__ = msg