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bpo-44807: Allow Protocol classes to define __init__ (GH-31628)

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Co-authored-by: Jelle Zijlstra <jelle.zijlstra@gmail.com>
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Adrian Garcia Badaracco 2022-04-11 09:51:25 -05:00 • committed by GitHub
parent b0b836b20c
commit 5f2abae61e
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3 changed files with 29 additions and 1 deletions
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Lib/typing.py
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@ -1997,7 +1997,8 @@ class Protocol(Generic, metaclass=_ProtocolMeta):
issubclass(base, Generic) and base._is_protocol):
raise TypeError('Protocols can only inherit from other'
' protocols, got %r' % base)
cls.__init__ = _no_init_or_replace_init
if cls.__init__ is Protocol.__init__:
cls.__init__ = _no_init_or_replace_init
class _AnnotatedAlias(_GenericAlias, _root=True):