class-variable-slots-conflict / E0242

Message emitted:

Value %r in slots conflicts with class variable

Description:

Used when a value in __slots__ conflicts with a class variable, property or method.

Problematic code:

class Person:
    # +1: [class-variable-slots-conflict, class-variable-slots-conflict, class-variable-slots-conflict]
    __slots__ = ("age", "name", "say_hi")
    name = None

    def __init__(self, age, name):
        self.age = age
        self.name = name

    @property
    def age(self):
        return self.age

    def say_hi(self):
        print(f"Hi, I'm {self.name}.")

Correct code:

class Person:
    __slots__ = ("_age", "name")

    def __init__(self, age, name):
        self._age = age
        self.name = name

    @property
    def age(self):
        return self._age

    def say_hi(self):
        print(f"Hi, I'm {self.name}.")

Created by the classes checker.