Invalid undefined-variable error for metaclass value in Python 3.5

[mitar]

Steps to reproduce

1. Create two files in a module. foo.py:

def fun():
    pass

Metaclass = fun()

test.py:

from . import foo


class Foo(metaclass=foo.Metaclass):
    pass

2. Run pylint on test.py.

Current behavior

Two relevant errors are returned:

E:  4, 0: Undefined variable 'foo.Metaclass' (undefined-variable)
W:  1, 0: Unused import foo (unused-import)

Expected behavior

No error is returned about undefined variable foo.Metaclass or unused import.

pylint --version output

No config file found, using default configuration
pylint 1.7.2, 
astroid 1.5.3
Python 3.5.2 (default, Oct 11 2016, 05:00:16) 
[GCC 4.2.1 Compatible Apple LLVM 7.0.2 (clang-700.1.81)]

[PCManticore]

Is this inside a package? It doesn't seem so from your example, which is why this might not work

[mitar]

I made a reproduction here:

https://github.com/mitar/pylint-issue-1603

Running pylint foo/ shows (among others, unrelated) the following:

E:  4, 0: Undefined variable 'metaclass.AbstractMetaclass' (undefined-variable)
W:  1, 0: Unused metaclass imported from foo.utils (unused-import)