Python的枚举类型

Python的

Python的没有我们有两种用法：

1. 创建Enum的实例
2. 创建Enum的subclass

创建Enum的实例

from enum import Enum, unique

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

# 用法

print(Month.Jan.value)

for k, v in Month.__members__.items():

    print(k, v.value)

创建Enum的subclass

from enum import Enum, unique

@unique

class Month2(Enum):

    Jan = 0

    Feb = 1

    Mar = 2

    Apr = 3

    May = 4

    Jun = 5

    Jul = 6

    Aug = 7

    Sep = 8

    Oct = 9

    Nov = 10

    Dec = 11

# 用法

print(Month2.Jan.value)

for k, v in Month2.__members__.items():

    print(k, v.value)

运行结果

# 1

# Jan 1

# Feb 2

# Mar 3

# Apr 4

# May 5

# Jun 6

# Jul 7

# Aug 8

# Sep 9

# Oct 10

# Nov 11

# Dec 12

# ----------------------------------------

# 0

# Jan 0

# Feb 1

# Mar 2

# Apr 3

# May 4

# Jun 5

# Jul 6

# Aug 7

# Sep 8

# Oct 9

# Nov 10

# Dec 11