# -*- coding: UTF-8 -*-
from calendar import monthrange
import datetime
import time
import os
#獲取本月年份與月份
Year = time.strftime("%Y", time.localtime())
Month = time.strftime("%m", time.localtime())
#獲取本月所有日期
def allDays(y,m):
#return ['{:04d}{:02d}{:02d}'.format(y,m,d) for d in range(1, monthrange(y,m)[1] + 1)]
return ['{:02d}'.format(d) for d in range(1, monthrange(y,m)[1] + 1)]
#打印下個月月份(2020-03的格式)
def getYesterday(Day=1):
today=datetime.date(int(Year),int(Month),1).replace(day=(int((allDays(int(Year),int(Month)))[-1])))
oneday=datetime.timedelta(days=Day)
yesterday=today+oneday #減號改成加號即爲打印n天后的日期。
return yesterday.strftime("%Y-%m") #轉換成指定的格式
print getYesterday()