False positive (no-value-for-parameter) when chaining partial from functools

[JeremyVriens]

Background: when using partial from functools (which is a default function from Python3) multiple times in a chain, pylint doesn't recognise the previous defined value(s) for the current argument(s).

Steps to reproduce

1. Make a new file animal.py

""" False positive demo for no-value-for-parameter """
from functools import partial

def animal(name, type_, legs):
    """ Prints 'name' is a 'type_' with 'legs' legs
    """
    print(f'{name} is a {type_} with {legs} legs')

MAMMAL = partial(animal, type_='mammal')
DOG = partial(MAMMAL, legs=4)

if __name__ == "__main__":
    DOG('Jake')

Jake is a mammal with 4 legs

2. Run pylint animal.py

Current behavior

************* Module animal
animal.py:13:4: E1120: No value for argument 'type_' in function call (no-value-for-parameter)

---

Your code has been rated at 2.86/10 (previous run: 1.43/10, +1.43)

Expected behavior

The code should be rated at 10/10

pylint --version output

pylint 2.1.1
astroid 2.0.4
Python 3.6.5 (default, Apr 1 2018, 05:46:30)
[GCC 7.3.0]

[PCManticore]

Thank you, I can reproduce the bug.

[bjtho08]

I have the same bug, but I'm not using any functools import.

[JeremyVriens]

This issue is no longer valid.

[Pierre-Sassoulas]

I was curious so I bisected: it was fixed when we upgraded astroid to 2.8.0 in ca455ce.