no-classmethod-decorator (PLR0202)

Derived from the Pylint linter.

Fix is always available.

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

What it does

Checks for the use of a classmethod being made without the decorator.

Why is this bad?

When it comes to consistency and readability, it's preferred to use the decorator.

Example

class Foo:
    def bar(cls): ...

    bar = classmethod(bar)

Use instead:

class Foo:
    @classmethod
    def bar(cls): ...