python 日期操作类代码

完整代码

# -*- coding: utf-8 -*- 获取当前日期前后N天或N月的日期 from time import strftime, localtime from datetime import timedelta, date import calendar year = strftime(%Y,localtime()) mon = strftime(%m,localtime()) day = strftime(%d,localtime()) hour = strftime(%H,localtime()) min = strftime(%M,localtime()) sec = strftime(%S,localtime()) def today(): get today,date format=YYYY-MM-DD return date.today() def todaystr(): get date string, date format=YYYYMMDD return year+mon+day def datetime(): get datetime,format=YYYY-MM-DD HH:MM:SS return strftime(%Y-%m-%d %H:%M:%S,localtime()) def datetimestr(): get datetime string date format=YYYYMMDDHHMMSS return year+mon+day+hour+min+sec def get_day_of_day(n=0): if n>=0,date is larger than today if n<0,date is less than today date format = YYYY-MM-DD if(n<0): n = abs(n) return date.today()-timedelta(days=n) else: return date.today()+timedelta(days=n) def get_days_of_month(year,mon): get days of month return calendar.monthrange(year, mon)[1] def get_firstday_of_month(year,mon): get the first day of month date format = YYYY-MM-DD days=01 if(int(mon)<10): mon = 0+str(int(mon)) arr = (year,mon,days) return -.join(%s %i for i in arr) def get_lastday_of_month(year,mon): get the last day of month date format = YYYY-MM-DD days=calendar.monthrange(year, mon)[1] mon = addzero(mon) arr = (year,mon,days) return -.join(%s %i for i in arr) def get_firstday_month(n=0): get the first day of month from today n is how many months (y,m,d) = getyearandmonth(n) d = 01 arr = (y,m,d) return -.join(%s %i for i in arr) def get_lastday_month(n=0): get the last day of month from today n is how many months return -.join(%s %i for i in getyearandmonth(n)) def getyearandmonth(n=0): get the year,month,days from today befor or after n months thisyear = int(year) thismon = int(mon) totalmon = thismon+n if(n>=0): if(totalmon<=12): days = str(get_days_of_month(thisyear,totalmon)) totalmon = addzero(totalmon) return (year,totalmon,days) else: i = totalmon/12 j = totalmon%12 if(j==0): i-=1 j=12 thisyear += i days = str(get_days_of_month(thisyear,j)) j = addzero(j) return (str(thisyear),str(j),days) else: if((totalmon>0) and (totalmon<12)): days = str(get_days_of_month(thisyear,totalmon)) totalmon = addzero(totalmon) return (year,totalmon,days) else: i = totalmon/12 j = totalmon%12 if(j==0): i-=1 j=12 thisyear +=i days = str(get_days_of_month(thisyear,j)) j = addzero(j) return (str(thisyear),str(j),days) def addzero(n): add 0 before 0-9 return 01-09 nabs = abs(int(n)) if(nabs<10): return 0+str(nabs) else: return nabs def get_today_month(n=0): 获取当前日期前后N月的日期 if n>0, 获取当前日期前N月的日期 if n<0, 获取当前日期后N月的日期 date format = YYYY-MM-DD (y,m,d) = getyearandmonth(n) arr=(y,m,d) if(int(day)<int(d)): arr = (y,m,day) return -.join(%s %i for i in arr) if __name__==__main__: print today() print todaystr() print datetime() print datetimestr() print get_day_of_day(20) print get_day_of_day(-3) print get_today_month(-3) print get_today_month(3)

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