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)