Python 入门demo第二篇

循环执行逻辑

 #-*- coding: UTF-8 -*-
 import time
 import urllib2

 def task(i):
     urlstr='http://baidu.com'
     html = urllib2.urlopen(urlstr,timeout=30).read()
     # -*- coding: UTF-8 -*-
     print '第',str(i),'次'

 def tasking(j):
     urlstr = 'http://baidu.com'
     html = urllib2.urlopen(urlstr,timeout=30).read()
     print '第',str(j),'次'

 def timer(n):
     i=0;
     j=0;
     while True:
         print time.strftime('%Y-%m-%d %X', time.localtime())
         i+=1
         j+=1
         task(i)
         tasking(j)
         time.sleep(n)

 if __name__ == '__main__':
     timer(300)