python: enum
3650 ワード
PythonのEnumクラスの例
Weekdayはそのまま使えます.Sunは定数を参照します
Enumクラスをカスタマイズすることもできます.
定数と定数に対応する値を表示します.
>>> from enum import Enum
>>> Weekday = Enum('Weekday', ('Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'))
>>> for name, member in Weekday.__members__.items():
... print(name, member.value) #value int , 1 。
...
Sun 1
Mon 2
Tue 3
Wed 4
Thu 5
Fri 6
Sat 7
>>>
Weekdayはそのまま使えます.Sunは定数を参照します
>>> Weekday.Sun
.Sun: 1>
>>>
Enumクラスをカスタマイズすることもできます.
>>> from enum import Enum, unique
>>> @unique # @unique
... class Weekday(Enum):
... Sun = 0 #
... Mon = 1
... Tue = 2
... Wed = 3
... Thu = 4
... Fri = 5
... Sat = 6
...
>>> for name, no in Weekday.__members__.items():
... print(name, no.value)
...
Sun 0
Mon 1
Tue 2
Wed 3
Thu 4
Fri 5
Sat 6
>>>
定数と定数に対応する値を表示します.
>>> Weekday.Sun
<Weekday.Sun: 0>
>>> Weekday.Sun.value
0
>>> Weekday['Sun']
<Weekday.Sun: 0>
>>> Weekday(0)
<Weekday.Sun: 0>
>>>
>>>> s = Weekday.Sun # ,
>>> s
<Weekday.Sun: 0>
>>> s.value
0