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meta-class-abc-meta (FURB180)#

Derived from the refurb linter.

Fix is always available.

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

What it does#

Checks for uses of metaclass=abc.ABCMeta to define abstract base classes (ABCs).

Why is this bad?#

Instead of class C(metaclass=abc.ABCMeta): ..., use class C(ABC): ... to define an abstract base class. Inheriting from the ABC wrapper class is semantically identical to setting metaclass=abc.ABCMeta, but more succinct.


class C(metaclass=ABCMeta):

Use instead:

class C(ABC):