python 枚举enum

python 枚举enum

from enum import Enum


class EnumTest(Enum):
    spring = [1,2,3]
    summer = [4,5,6]
    autumn = [7,8,9]
    winter = [10,11,12]

print(EnumTest.spring)          #输出 EnumTest.spring
print(EnumTest.summer)          #输出 EnumTest.summer     
print(EnumTest.autumn)          #输出 EnumTest.autumn
print(EnumTest.winter)          #输出 EnumTest.winter

print(type(EnumTest.spring))          #输出 <enum 'EnumTest'>
print(type(EnumTest.summer))          #输出 <enum 'EnumTest'>
print(type(EnumTest.autumn))          #输出 <enum 'EnumTest'>
print(type(EnumTest.winter))          #输出 <enum 'EnumTest'>

print(EnumTest.spring.name)          #输出 spring
print(EnumTest.summer.name)          #输出 summer
print(EnumTest.autumn.name)          #输出 autumn
print(EnumTest.winter.name)          #输出 winter

print(EnumTest.spring.value)          #输出 [1,2,3]
print(EnumTest.summer.value)          #输出 [4,5,6]
print(EnumTest.autumn.value)          #输出 [7,8,9]
print(EnumTest.winter.value)          #输出 [10,11,12]

除了用类来创建枚举，还可以直接用Enum()创建枚举，默认的序号/value是1,2,3,4,5.......

YearSeason = Enum('season',('spring','summer','autumn','winter'))
for name,member in YearSeason.__members__.items():
    print(name,'==>',member.value,'==>',member)

#输出：spring ==> 1 ==> season.spring
#输出：summer ==> 2 ==> season.summer
#输出：autumn ==> 3 ==> season.autumn
#输出：winter ==> 4 ==> season.winter
    
print(YearSeason)       #输出：<enum 'season'>
print(YearSeason(1))    #输出：season.spring
print(YearSeason(2))    #输出：season.summer
print(YearSeason(3))    #输出：season.autumn
print(YearSeason(4))    #输出：season.winter
print('========================================================')
print(len(YearSeason))      #输出：4
print('========================================================')
print(YearSeason.spring)    #输出：season.spring
print(YearSeason['spring']) #输出：season.spring
print('========================================================')


for i in range(1,(len(YearSeason)+1)):
    print(YearSeason(i))    
   #输出：season.spring
   #输出：season.summer
   #输出：season.autumn
   #输出：season.winter

Enum