Python scheduled task to achieve a simple example of three ways

This article describes three examples of ways to achieve the scheduled task's Python. Share to you for your reference, as follows:

1. Timing task code

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. periodic tasks

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. Run the loop

import time,os

def re_exe(cmd,inc = 60 ):

   while True :

     os.system(cmd)

     time.sleep(inc)

re_exe( "echo %time%" , 5 )