python / python/typeshed

`bool()` return type on with no arguments

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Python
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Description

Right now bool has this __new__ signature: def __new__(cls: Type[_T], __o: object = ...) -> _T: ...

Should not it be:

@overload
def __new__(cls) -> Literal[False]: ...
@overload
def __new__(cls: Type[_T], __o: object) -> _T: ...

?

Current source:
https://github.com/python/typeshed/blob/2217ac8a8c7004baad94a5adcb0d503d985eaa21/stdlib/builtins.pyi#L676

What do you think?

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Research direction

Start with stdlib/builtins.pyi around line 676 and read the issue's comment thread to resolve how bool() with and without an argument should be typed. Done means the agreed signature is represented in the stub and the resulting behavior is validated for both call forms.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
tooling
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Clearly specified
Newbie friendliness
45/100

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