deprecated-abc-decorator (UP051)

Preview (since 0.15.21) · Related issues · View source

Derived from the pyupgrade 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 abstractclassmethod, abstractstaticmethod, abstractproperty.

Why is this bad?

These have been deprecated since Python 3.3 and are expected to be removed in a future version of Python.

Example

import abc


class Foo(abc.ABC):
    @abc.abstractclassmethod
    def class_method(cls, arg1): ...

    @abc.abstractstaticmethod
    def static_method(arg1): ...

    @abc.abstractproperty
    def prop(self): ...

Use instead:

import abc


class Foo(abc.ABC):
    @classmethod
    @abc.abstractmethod
    def class_method(cls, arg1): ...

    @staticmethod
    @abc.abstractmethod
    def static_method(arg1): ...

    @property
    @abc.abstractmethod
    def prop(self): ...