#python 列舉類 示例#2016-8-30 18:55:25#mengmengcoding#-*- coding: utf-8 -*-
from enum importenum#enum是乙個列舉類#month,weekday各為乙個enum類的例項化
month=enum('month',('jan', 'feb', 'mar', 'apr', 'may', 'jun', 'jul', 'aug', 'sep', 'oct', 'nov', 'dec'))
weekday=enum('weekday',('mon','tue','wed','thu','fri','sat','sun'))for name,member in month.__members__.items():print(name,'=>',member,',',member.value)print('--------cut-off line--------')#輸出：
'''jan => month.jan , 1
feb => month.feb , 2
mar => month.mar , 3
apr => month.apr , 4
may => month.may , 5
jun => month.jun , 6
jul => month.jul , 7
aug => month.aug , 8
sep => month.sep , 9
oct => month.oct , 10
nov => month.nov , 11
dec => month.dec , 12'''
for name,member in weekday.__members__.items():print(name,'=>',member,',',member.value)print('--------cut-off line--------')#輸出：
'''mon => weekday.mon , 1
tue => weekday.tue , 2
wed => weekday.wed , 3
thu => weekday.thu , 4
fri => weekday.fri , 5
sat => weekday.sat , 6
sun => weekday.sun , 7'''
#如果需要更精確地控制列舉型別，可以從enum派生出自定義類#這裡還是用周來舉例吧，誰讓我見識少呢~#用weekday來區別之前的weekday吧
from enum importenum,unique
@unique#@unique裝飾器可以幫助我們檢查保證沒有重複值
class weekday(enum): #由enum類派生得到
sun=0
mon=1tue=2wed=3thu=4fri=5sat=6day1=weekday.monprint('day1=',day1)print('weekday.tue=',weekday.tue)print('weekday[\'tue\']=',weekday['tue'])print('weekday.tue.value=',weekday.tue.value)print('day1==weekday.mon ?',day1==weekday.mon)print('day1==weekday.tue ?',day1==weekday.tue)print('day1==weekday(1) ?',day1==weekday(1))#輸出：
'''day1= weekday.mon
weekday.tue= weekday.tue
weekday['tue']= weekday.tue
weekday.tue.value= 2
day1==weekday.mon ? true
day1==weekday.tue ? false
day1==weekday(1) ? true'''
print('--------cut-off line--------')for name,member in weekday.__members__.items():print(name,'=>',member)#輸出：
'''sun => weekday.sun
mon => weekday.mon
tue => weekday.tue
wed => weekday.wed
thu => weekday.thu
fri => weekday.fri
sat => weekday.sat'''
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