python 定时器每天就执行一次的实现代码

#-*-coding:utf-8 -*-
__author__ = 'Administrator'
import os,threading,time
curTime=time.strftime("%Y-%M-%D",time.localtime())#记录当前时间
execF=False
ncount=0
def execTask():
  #具体任务执行内容
  print("execTask executed!")
def timerTask():
  global execF
  global curTime
  global ncount
  if execF is False:
    execTask()#判断任务是否执行过，没有执行就执行
    execF=True
  else:#任务执行过，判断时间是否新的一天。如果是就执行任务
    desTime=time.strftime("%Y-%M-%D",time.localtime())
    if desTime > curTime:
      execF = False#任务执行执行置值为
      curTime=desTime
  ncount = ncount+1
  timer = threading.Timer(5,timerTask)
  timer.start()
  print("定时器执行%d次"%(ncount))
if __name__=="__main__":
  timer = threading.Timer(5,timerTask)
  timer.start()

import threading
import time
exec_count = 0
def heart_beat():
  print time.strftime('%Y-%m-%d %H:%M:%S')
  global exec_count
  exec_count += 1
  # 15秒后停止定时器
  if exec_count < 15:
    threading.Timer(1, heart_beat).start()
heart_beat()

import threading
import time
cancel_tmr = False
def heart_beat():
  print time.strftime('%Y-%m-%d %H:%M:%S')
  if not cancel_tmr:
    threading.Timer(1, heart_beat).start()
heart_beat()
# 15秒后停止定时器
time.sleep(15) 
cancel_tmr = True