从 Python 中的字符串列表创建枚举 class

Question

当我运行这个

from enum import Enum

class MyEnumType(str, Enum):
    RED   = 'RED'
    BLUE  = 'BLUE'
    GREEN = 'GREEN'

for x in MyEnumType:
    print(x)

我得到了预期的结果：

MyEnumType.RED
MyEnumType.BLUE
MyEnumType.GREEN

是否可以从从其他地方获得的列表或元组创建这样的 class？

可能有点类似于：

myEnumStrings = ('RED', 'GREEN', 'BLUE')

class MyEnumType(str, Enum):
    def __init__(self):
        for x in myEnumStrings :
            self.setattr(self, x,x)

但是，和原来一样，我不想显式地实例化一个对象。

Answer 1

您可以为此使用 enum functional API：

from enum import Enum


myEnumStrings = ('RED', 'GREEN', 'BLUE')
MyEnumType = Enum('MyEnumType', myEnumStrings)

来自文档：

The first argument of the call to Enum is the name of the enumeration.

The second argument is the source of enumeration member names. It can be a whitespace-separated string of names, a sequence of names, a sequence of 2-tuples with key/value pairs, or a mapping (e.g. dictionary) of names to values.

从 Python 中的字符串列表创建枚举 class

Create an enum class from a list of strings in Python

python

enums