René's URL Explorer Experiment

Title: gh-105080: Fixed inconsistent signature on derived classes by gaogaotiantian · Pull Request #105217 · python/cpython · GitHub

Open Graph Title: gh-105080: Fixed inconsistent signature on derived classes by gaogaotiantian · Pull Request #105217 · python/cpython

X Title: gh-105080: Fixed inconsistent signature on derived classes by gaogaotiantian · Pull Request #105217 · python/cpython

Description: class B: def __new__(self, *args, **kwargs): return super().__new__(self) def __init__(self, value): self.value = value class D1(B): def __init__(self, value): super().__init__(value) class D2(D1): pass For the code above, inspect.signature(D2) will give a different result than inspect.signature(D1), which is counter-intuitive. This also affects help(D2) vs help(D1). We should keep the consistency for the signatures for derived classes (of course when the signature is not changed). This is due to a corner case in inspect.signature() where only the direct defined __init__ and __new__ method on the class takes priority, then __new__ is always used if defined on any base classes. This fix searches __new__ and __init__ based on MRO and prioritize __new__ if both are defined on a base class. Issue: gh-105080

Open Graph Description: class B: def __new__(self, *args, **kwargs): return super().__new__(self) def __init__(self, value): self.value = value class D1(B): def __init__(self, value): ...

X Description: class B: def __new__(self, *args, **kwargs): return super().__new__(self) def __init__(self, value): self.value = value class D1(B): def __init__(self, value): ...

Opengraph URL: https://github.com/python/cpython/pull/105217

X: @github

direct link

Domain: github.com

Links:

Viewport: width=device-width