Since Python 3.11 there are now StrEnum and IntEnum:

from enum import Enum, IntEnum, StrEnum

class Foo(str, Enum):  ...  # Python<3.11
class Foo(StrEnum):  ...  # Python>=3.11

class Bar(int, Enum): ...  # Python<3.11
class Bar(IntEnum): ...  # Python>=3.11

pyupgrade can be used to suggest this change.

However, this request was rejected in pyupgrade itself here: asottile/pyupgrade#779. Apparently they're not identical in behavior. Luckily, ruff has a concept of safe vs unsafe, so I think ruff can actually implement this rule.

The request here is for ruff to suggest this upgrade as an unsafe fix, ideally with autofix support.