#!/usr/bin/python # -*- coding:utf-8 -*- import datetime,os,platform,time def run_Task():     import SendMail     SendMail.SendMail()     #os_platform=platform.platform()     ##if os_platform.startswith("Darwin"):         #print "this is mac os system!"         #os.system("ls")     #elif os_platform.startswith("Linux"):         #print "this is Linux system!"         #os.system("ls") def timerFun(sched_Timer):     flag = 0     #now = datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")     while True:         now = datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")         #print now,sched_Timer         if now == str(sched_Timer):             print "*"*30             run_Task()             flag = 1             time.sleep(60)             #break         else:             if flag==1:                 sched_Timer=sched_Timer+datetime.timedelta(days=1)                 flag=0 if __name__ =="__main__":     sched_Timer = datetime.datetime(2018,5,8,9,0,0)     print "run the timer task at{0}".format(sched_Timer)     timerFun(sched_Timer)