Literal of enum values

I am trying to implement a function that, as the type of one argument, can accept either an Enum or a value of such an enum (because some Python programmers are more used to type strings instead of enum values). Currently I have managed to do the following:

class LinkageCriterion(enum.Enum):
    WARD = "ward"
    COMPLETE = "complete"
    AVERAGE = "average"
    SINGLE = "single"


LinkageCriterionLike = Union[
    LinkageCriterion,
    Literal["ward", "complete", "average", "single"]
]

My question is if there is a way to not repeat myself here, that is, if you can construct a Literal from the values of a given Enum, and if so, how?

Commencez par vérifier la spécification du typage de Python et le comportement de Literal avec des valeurs de Enum. Comparez le modèle LinkageCriterionLike demandé avec la prise en charge actuelle de typing, puis documentez si les valeurs de Enum peuvent être déduites automatiquement ou quelle limitation subsiste.