Python实现定时执行任务的三种方式简单示例

本文实例讲述了Python实现定时执行任务的三种方式。分享给大家供大家参考，具体如下：

1.定时任务代码

import time,os,sched

schedule = sched.scheduler(time.time,time.sleep)

def perform_command(cmd,inc):

  os.system(cmd)

  print('task')

def timming_exe(cmd,inc=60):

  schedule.enter(inc,0,perform_command,(cmd,inc))

  schedule.run()

print('show time after 2 seconds:')

timming_exe('echo %time%',2)

2.周期性执行任务

import time,os,sched

schedule = sched.scheduler(time.time,time.sleep)

def perform_command(cmd,inc):

  #在inc秒后再次运行自己，即周期运行

  schedule.enter(inc, 0, perform_command, (cmd, inc))

  os.system(cmd)

def timming_exe(cmd,inc=60):

  schedule.enter(inc,0,perform_command,(cmd,inc))

  schedule.run()#持续运行，直到计划时间队列变成空为止

print('show time after 2 seconds:')

timming_exe('echo %time%',2)

3.循环执行命令

import time,os

def re_exe(cmd,inc = 60):

  while True:

    os.system(cmd)

    time.sleep(inc)

re_exe("echo %time%",5)