Python中時間的處理之——timedelta篇

#! /usr/bin/python# coding=utf-8from datetime import datetime,timedelta"""timedelta代表兩個datetime之間的時間差"""now = datetime.now()past = past = datetime(2010,11,12,13,14,15,16)timespan = now - past#這會得到一個負數past - nowattrs = [("days","日"),( 'seconds',"秒"),( 'microseconds',"毫秒")#('min',"最小"),( 'max',"最大"),]for k,v in attrs:    "timespan.%s = %s #%s" % (k,getattr(timespan, k),v)"""總共相差的秒數"""timespan.total_seconds()"""執行個體化一個timespan請注意它的參數順序timedelta([days[, seconds[, microseconds[, milliseconds[, minutes[, hours[, weeks]]]]]]])"""timespan = timedelta(days=1)now - timespan #返回的是datetime型now + timespantimespan * 2 #還可以乘哦。代表二倍timespan / 13#增加一個月from calendar import monthrangenow + timedelta(days=monthrange(start.year,start.month)[1])