gh-91621: Fix typing.get_type_hints for collections.abc.Callable #91656
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This mirrors logic in typing.get_args. The trickiness comes from how we flatten args in collections.abc.Callable, see https://bugs.python.org/issue42195
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I think we can skip news since this is just a fix for the unreleased #30900 |
Lib/typing.py
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| @@ -350,7 +350,11 @@ def _eval_type(t, globalns, localns, recursive_guard=frozenset()): | |||
| ForwardRef(arg) if isinstance(arg, str) else arg | |||
| for arg in t.__args__ | |||
| ) | |||
| t = t.__origin__[args] | |||
| if (t.__origin__ is collections.abc.Callable | |||
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I know this code pattern appears once in Generic code and once here now. Should we just convert this into one function? Maybe _should_flatten_callable_args()? Seems abit tiresome to repeat this (and it's also confusing for people who haven't dealt with Callable's args before).
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(sorry, missed this comment)
I added a helper function for this
JelleZijlstra
approved these changes
May 2, 2022
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This mirrors logic in typing.get_args. The trickiness comes from how we
flatten args in collections.abc.Callable, see
https://bugs.python.org/issue42195
#91621