Pythonオブジェクト指向プログラミングの高度な記事の列挙型クラス列挙型

次のように月を定義できます

from enum import Enum

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

for name, member in Month.__members__.items():
    print(name, '=>', member, ',', member.value)

月の下には12のインスタンスがあり、値には1、2、3が割り当てられます...

直接使用できますMonth.Jan

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
>>> for name, member in Weekday.__members__.items():
...     print(name, '=>', member)
Sun => Weekday.Sun
Mon => Weekday.Mon
Tue => Weekday.Tue
Wed => Weekday.Wed
Thu => Weekday.Thu
Fri => Weekday.Fri
Sat => Weekday.Sat

>>> day1 = Weekday.Mon
>>> print(day1)
Weekday.Mon
>>> print(Weekday.Tue)
Weekday.Tue
>>> print(Weekday['Tue'])
Weekday.Tue
>>> print(Weekday.Tue.value)
2
>>> print(day1 == Weekday.Mon)
True
>>> print(day1 == Weekday.Tue)
False
>>> print(Weekday(1))

@uniqueデコレータは、重複する値がないことを確認するのに役立ちます。

呼び出し方法は非常に単純なWeekday.Monです。

参照元：https：//www.liaoxuefeng.com/wiki/1016959663602400/1017592449371072