python 枚举类

枚举类

Enum类

from enum import Enum

Month = Enum('Month', ('Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'))

value属性则是自动赋给成员的int常量，默认从1开始计数
for name, member in Month.__members__.items():
print(name, '=>', member, ',', member.value)

自定义类
from enum import Enum, unique

@unique
class Weekday(Enum):
Sun = 0 # Sun的value被设定为0
Mon = 1
Tue = 2
Wed = 3
Thu = 4
Fri = 5
Sat = 6
@unique装饰器可以帮助我们检查保证没有重复值
访问：
>>> print(Weekday['Tue'])
Weekday.Tue
>>> print(Weekday.Tue.value)
2
>>> print(Weekday(1))
Weekday.Mon