默认情况下，如何在枚举中将元素评估为它们的值？ [英] How can I have elements in an Enum evaluate as their value by default?

问题描述

反正我可以有一个如下所示的枚举

Is there anyway I can have an Enum like below

class Key(Enum):
    CUSTOMER_ID = 'c_id'
    PHONE_NUMBER = 'phone'

从而调用 Key.CUSTOMER_ID 默认情况下计算为'c_id'，而无需调用 CUSTOMER_ID.value ？

such that calling Key.CUSTOMER_ID evaluates to 'c_id' by default, without the need of calling CUSTOMER_ID.value?

有没有我可以重写的方法来更改评估时返回的对象是什么？

Is there any method I can override that changes what the object returned when evaluated is?

推荐答案

何时要枚举成员以评估其值，您需要混合其值类型：

When you want the Enum members to evaluate as their value, you need to mixin their value type:

class Key(str, Enum):             # note that `str` is before `Enum`
    CUSTOMER_ID = 'c_id'
    PHONE_NUMBER = 'phone'

使用中：

>>> Key.PHONE_NUMBER == 'phone'
True

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