no-self-use (PLR6301)

Derived from the Pylint linter.

This rule is unstable and in preview. The --preview flag is required for use.

What it does

Checks for the presence of unused self parameter in methods definitions.

Why is this bad?

Unused self parameters are usually a sign of a method that could be replaced by a function, class method, or static method.

Example

class Person:
    def greeting(self):
        print("Greetings friend!")

Use instead:

def greeting():
    print("Greetings friend!")

or

class Person:
    @staticmethod
    def greeting():
        print("Greetings friend!")