Pylint: False positive no-value-for-parameter in metaclass

[mrginglymus]

Steps to reproduce

given dang.py

# pylint: disable=missing-module-docstring,blacklisted-name,invalid-name,missing-function-docstring,missing-class-docstring

class MetaDang(type):

    @staticmethod
    def foo(fn, string):
        fn(string)

    def bar(cls, string):
        cls.foo(print, string)

    def baz(cls):
        cls.bar('woo')

class Dang(metaclass=MetaDang):
    pass

Dang.baz()

Current behavior

py -3.7 -m pylint dang.py
************* Module dang
dang.py:13:8: E1120: No value for argument 'string' in unbound method call (no-value-for-parameter)

------------------------------------------------------------------
Your code has been rated at 5.00/10

Expected behavior

py -3.7 -m pylint dang.py

-------------------------------------------------------------------
Your code has been rated at 10.00/10

pylint --version output

pylint 2.4.0
astroid 2.3.3
Python 3.7.4 (tags/v3.7.4:e09359112e, Jul 8 2019, 20:34:20) [MSC v.1916 64 bit (AMD64)]

[PCManticore]

Thanks, I agree we should fix this.

[ifinik]

Hi, it this issue, isn't it?

from abc import ABCMeta
class Foo(ABCMeta):
    def __getattr__(cls, bar):
        return cls(bar)

class Bar(metaclass=Foo):
    def __init__(self, foo):
        self.foo = foo

No value for argument 'bases' in constructor call
No value for argument 'namespace' in constructor call
If "ABCMeta" is replaced by "type"
messages do not appear

[jourdanrodrigues]

Same issue here (I know I shouldn't comment, but I feel it won't get attention if they don't notice it).