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bpo-40257: Improve help for the typing module (GH-19546)

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* Show docstring for special forms.
* Show docstring for special generic aliases.
* Show documentation for __origin__ for generic aliases.
This commit is contained in:
Serhiy Storchaka 2020-04-18 17:13:21 +03:00 • committed by GitHub
parent c606624af8
commit 7e64414f57
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5 changed files with 24 additions and 4 deletions
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6
Lib/typing.py
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@ -323,6 +323,10 @@ class _SpecialForm(_Final, _Immutable, _root=True):
self._name = name
self._doc = doc
@property
def __doc__(self):
return self._doc
def __eq__(self, other):
if not isinstance(other, _SpecialForm):
return NotImplemented
@ -672,6 +676,8 @@ class _GenericAlias(_Final, _root=True):
self.__slots__ = None # This is not documented.
if not name:
self.__module__ = origin.__module__
if special:
self.__doc__ = f'A generic version of {origin.__module__}.{origin.__qualname__}'
@_tp_cache
def __getitem__(self, params):