python每隔N秒运行指定的函数程序详解编程语言

一个类似定时器的效果，每隔指定的秒数运行指定的函数，采用线程实现，代码简单实用。

import os 
import time 
  
def print_ts(message): 
    print "[%s] %s"%(time.strftime("%Y-%m-%d %H:%M:%S", time.localtime()), message) 
  
def run(interval, command): 
    print_ts("-"*100) 
    print_ts("Command %s"%command) 
    print_ts("Starting every %s seconds."%interval) 
    print_ts("-"*100) 
  
    while True: 
        try: 
            # sleep for the remaining seconds of interval，http://www.sharejs.com 
            time_remaining = interval-time.time()%interval 
            print_ts("Sleeping until %s (%s seconds)..."%((time.ctime(time.time()+time_remaining)), time_remaining)) 
            time.sleep(time_remaining) 
            print_ts("Starting command.") 
  
            # execute the command 
            status = os.system(command) 
            print_ts("-"*100) 
            print_ts("Command status = %s."%status) 
        except Exception, e: 
            print e 
  
if __name__=="__main__": 
    interval = 5 
    command = r"ipconfig" 
    run(interval, command)