浅谈Python 的枚举 Enum

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)

> day1 = Weekday.Mon
> print(day1)
Weekday.Mon
> print(Weekday.Tue)
Weekday.Tue
> print(Weekday['Tue'])
Weekday.Tue
> print(Weekday.Tue.value)
> print(day1 == Weekday.Mon)
True
> print(day1 == Weekday.Tue)
False
> print(Weekday(1))
Weekday.Mon
> print(day1 == Weekday(1))
True
> Weekday(7)
Traceback (most recent call last):
 ...
ValueError: 7 is not a valid Weekday
> 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