Bug report

Bug description:

The first argument of the new__replace__ method on dataclasses is conspicuously namedobj rather thanself. While that's not a bug, it would be kinder on introspection tools to useself, since it is otherwise a regular instance method.

>>>importdataclasses,inspect,pprint>>>@dataclasses.dataclass...classFoo:...x:int...>>>pprint.pprint({n:inspect.signature(f)forn,fininspect.getmembers(Foo,inspect.isfunction)}){'__eq__':<Signature (self,other)>,'__init__':<Signature (self,x:int)->None>,'__replace__':<Signature (obj,/,**changes)>,'__repr__':<Signature (self)>}

__replace__ was added in#108752

CPython versions tested on:

3.13

Operating systems tested on:

macOS

Linked PRs

• gh-114198: Rename dataclass __replace__ argument to 'self' #114251