New enum features in Python 3.11

There's a ton of new enum features in Python 3.11 that mypy doesn't yet support:

• enum.property
• enum.verify
• enum.(non)member
• ReprEnum
• StrEnum

enum.property is not yet supported:

• #12483

The new enum.verify decorator isn't supported: the following snippet will raise an exception at runtime on 3.11 due to not all values being unique, but it passes mypy:

from enum import Enum, verify, UNIQUE

@verify(UNIQUE)
class Color(Enum):
    RED = 1
    GREEN = 2
    BLUE = 3
    CRIMSON = 1

enum.member/enum.nonmember. The docs are a bit thin on these, but it looks like in the following enum, BAR is converted to become a member, but BAZ
is not:

from enum import Enum, nonmember

class Foo(Enum):
    BAR = 1
    BAZ = nonmember(2)

(These two can also be used as decorators)

ReprEnum: this doesn't need any special support by mypy, but the following mypy bug but means that it can't really be used idiomatically at the moment:

• #12787

StrEnum: I didn't think this required any special treatment from mypy, but there's a weird bug here in mypy's handling of StrEnum:

• #14688

まず、mypy における Python enum の既存の処理と、Python 3.11 の enum ドキュメントを確認してください。issue にある enum.verify と enum.member/nonmember の例を使って期待される動作を判断し、別途リンクされている issue を考慮しつつ、一覧にある未対応機能が一貫して処理されることを確認してください。