在python中枚举是一种类（Enum,IntEnum），存放在enum模块中。枚举类型可以给一组标签赋予一组特定的值。
在开始前，我们先定义一个枚举类：
from enum import Enum class Vip(Enum): MONDAY = 0 TUESDAY = 1 WEDNESDAY = 2 THURSDAY = 3 FRIDAY = 4 SATURDAY = 5 SUNDAY = 6
示例一：获取在枚举类中定义的枚举成员
# 方法一： print(Vip.MONDAY) print(type(Vip.MONDAY)) # 方法二 print(Vip[‘TUESDAY‘]) print(type(Vip.TUESDAY)) # 方法三 print(Vip(2)) print(type(Vip(2))) ------------------- Vip.MONDAY <enum ‘Vip‘> Vip.TUESDAY <enum ‘Vip‘> Vip.WEDNESDAY <enum ‘Vip‘>
示例二：枚举成员中包含标签名和该标签对应的值
today = Vip.FRIDAY print(‘Today is ‘ + today.name + ‘. The number of today is ‘ + str(today.value)) ---------------------------------------- Today is FRIDAY. The number of today is 4
示例三：包含相同值的枚举类的迭代，默认情况下不会输出别名，但可通过迭代__members__来显示所有成员标签
from enum import Enum class Week(Enum): MONDAY = 0 TUESDAY = 1 FRIDAY = 4 TODAY = 4 # 以FRIDAY别名的形式存在 for day in Week: print(day) print(‘******************‘) for day in Week.__members__: print(day) ---------------------- Week.MONDAY Week.TUESDAY Week.FRIDAY ****************** MONDAY TUESDAY FRIDAY TODAY
示例四：限定不含相同值的枚举类@unique
from enum import Enum, unique @unique class Week(Enum): MONDAY = 0 TUESDAY = 1 FRIDAY = 4 TODAY = 4 -------------------------------------- ValueError: duplicate values found in <enum ‘Week‘>: TODAY -> FRIDAY
原文：https://www.cnblogs.com/huwt/p/11183768.html