Pylint: False positive for `signature-differs` when collecting all arguments

[GergelyKalmar]

This is a very similar bug to #1553. The main difference is that in this case we set a default value to one of the parameters in the function that we override in the subclass (see elit=None).

Steps to reproduce

Create a file lorem.py as follows:

class Ipsum:
    def dolor(self, elit=None):
        pass


class LoremIpsum(Ipsum):
    def dolor(self, *args, **kwargs):
        super().dolor(*args, **kwargs)

Note that this is a particularly common pattern in Django, for example when overriding the save method of models (see an example in the official documentation).

Current behavior

Run pylint on the file (pylint lorem.py):

...
lorem.py:7:4: W0222: Signature differs from overridden 'dolor' method (signature-differs)

Expected behavior

There is no error reported.

pylint --version output

pylint 2.5.3
astroid 2.4.2
Python 3.8.2 (default, Apr 27 2020, 15:53:34) 
[GCC 9.3.0]

[tgree]

+1

I hit this today as well; this is a very common idiom and shouldn't trigger a warning.

[GergelyKalmar]

I've prepared a small PR that fixes this issue: https://github.com/PyCQA/pylint/pull/3988

[abbra]

When do you plan to release new pylint? Right now pylint from pypi and also from Fedora 33 are both erroring with this issue. This blocks FreeIPA CI...

[krzysieqq]

Any news when this fix will be merged to master?

[GergelyKalmar]

The fix has been already merged some time ago: https://github.com/PyCQA/pylint/pull/3988

In fact, this fix should already be included in pylint 2.7.0+ as far as I remember.

[krzysieqq]

My bad I had 2.6 version, after upgrade everything works, thanks :)!