comparison-with-callable / W0143

Message emitted:

Comparing against a callable, did you omit the parenthesis?

Description:

This message is emitted when pylint detects that a comparison with a callable was made, which might suggest that some parenthesis were omitted, resulting in potential unwanted behaviour.

Problematic code:

def function_returning_a_fruit() -> str:
    return "orange"


def is_an_orange(fruit: str = "apple"):
    # apple == <function function_returning_a_fruit at 0x7f343ff0a1f0>
    return fruit == function_returning_a_fruit  # [comparison-with-callable]

Correct code:

def function_returning_a_fruit() -> str:
    return "orange"


def is_an_orange(fruit: str = "apple"):
    # apple == orange
    return fruit == function_returning_a_fruit()

Created by the basic checker.