"""  """

__author__ = 'shaozhiqi'

# 当我们需要定义常量时，一个办法是用大写变量通过整数来定义，例如月份：

JAN = 1

FEB = 2

MAR = 3

# 好处是简单，缺点是类型是int，并且仍然是变量

# --------------Enum----------------------------------------------

from enum import Enum

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

print(Month.Jan)  # Month.Jan

from enum import unique

# @unique装饰器可以帮助我们检查保证没有重复值。

@unique

class Weekday(Enum):

    Sun = 0  # Sun的value被设定为0

    Mon = 1

    Tue = 2

    Wed = 3

    Thu = 4

    Fri = 5

    Sat = 6

day1 = Weekday.Mon

print(day1)  # Weekday.Mon

print(day1.value)  #

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