no-method-argument / E0211

Message emitted:

Method %r has no argument

Description:

Used when a method which should have the bound instance as first argument has no argument defined.

Problematic code:

class Person:
    def print_greeting():  # [no-method-argument]
        print("hello")

Correct code:

class Person:
    def print_greeting(self):
        print("hello")

Created by the classes checker.