The help function shows incorrect signature for subclass #105080
Description
Bug report
With the following class hierarchy:
class A0:
def __new__(cls, *args, **kw):
return super().__new__(cls)
def __init__(self, *args, **kw):
super().__init__()
class A1(A0):
def __init__(self, a, b):
super().__init__()
self.a = a
self.b = b
class A2(A1):
c = Nonehelp(A2) shows the wrong signature for instantiating A2 as A2(*args, **kw) instead of the expected A2(a, b), despite the fact that is shows the correct signature for __init__:
Help on class A2 in module __main__:
class A2(A1)
| A2(*args, **kw)
|
| Method resolution order:
| A2
| A1
| A0
| builtins.object
|
| Data and other attributes defined here:
|
| c = None
|
| ----------------------------------------------------------------------
| Methods inherited from A1:
|
| __init__(self, a, b)
| Initialize self. See help(type(self)) for accurate signature.
|
| ----------------------------------------------------------------------
| Static methods inherited from A0:
|
| __new__(cls, *args, **kw)
| Create and return a new object. See help(type) for accurate signature.
|
...
Note that help(A1) works correctly and shows the correct signature as A1(a, b):
Help on class A1 in module __main__:
class A1(A0)
| A1(a, b)
|
| Method resolution order:
| A1
| A0
| builtins.object
|
| Methods defined here:
|
| __init__(self, a, b)
| Initialize self. See help(type(self)) for accurate signature.
|
| ----------------------------------------------------------------------
| Static methods inherited from A0:
|
| __new__(cls, *args, **kw)
| Create and return a new object. See help(type) for accurate signature.
|
...
This doesn't seem to be an issue if __new__ is not defined on A0, or if A1 redefines __new__ with the same signature as __init__.
Your environment
- CPython versions tested on: 3.11.3+
- Operating system and architecture: Linux x86