Python学习笔记11——枚举

from enum import Enum
from enum import unique

# Python定义枚举类型
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)


# 若要更精确的控制枚举类型，可以从Enum派生出自定义类：

@unique  # @unique可以帮助检查重复值
class Weekday(Enum):
    Sun = 0
    Mon = 1
    Tue = 2
    Wed = 3
    Thu = 4
    Fri = 5
    Sat = 6


# 调用枚举类型方法:既可以通过成员名称引用枚举常量，又可以直接根据value的值获取枚举常量
print(Weekday.Mon)
print(Weekday['Tue'])
print(Weekday.Wed.value)
print(Weekday(4))
for name, member in Weekday.__members__.items():
    print(name, '=>', member, '=>', member.value)