false positive: `no-member` on class variable defined by metaclass

[laf0rge]

Bug description

class ApduCommandMeta(abc.ABCMeta):
    def __new__(metacls, name, bases, namespace, **kwargs):
        x = super().__new__(metacls, name, bases, namespace)
        x._cla = namespace.get('cla', kwargs.get('cla', None))
        return x

class ApduCommand(Apdu, metaclass=ApduCommandMeta):
    @classmethod
    def match_cla(cls, cla) -> bool:
        for cla_match in cls._cla:

In that situation the access to cls._cla triggers thge following false-positive error message:

pySim/apdu/__init__.py:266:25: E1101: Class 'ApduCommand' has no '_cla' member; maybe 'cla'? (no-member)

So somehow it seems the linter doesn't appear to be aware that it must not only look at class members of the ApduCommand base class, but but also at all the class variables that any metaclasses might add?

The complete code can be found at https://gitea.osmocom.org/sim-card/pysim/src/branch/laforge/apdu_decoder

Configuration

No response

Command used

python3 -m pylint --errors-only \          249/0/0
        --disable E1102 \
        --disable E0401 \
        --enable W0301 \
        pySim *.py

Pylint output

pySim/apdu/__init__.py:266:25: E1101: Class 'ApduCommand' has no '_cla' member; maybe 'cla'? (no-member)

Expected behavior

I would expect the linter to consider any class variables/members added by metaclasses before complaining that some variable is not a member.

Pylint version

Python 3.10.5
pylint 2.12.2

OS / Environment

Debian unstable

Additional dependencies

No response