python实现简单爬虫-百度贴吧帖子中的图片

#coding=utf-8

import re
import urllib

def getHtml(url):
    page = urllib.urlopen(url)
    html = page.read()
    return html


def getImg(html):
    reg = r'src="(.+?\.jpg)" size'
    imgre = re.compile(reg)
    imglist = re.findall(imgre,html)
    x = 0
    for imgurl in imglist:
        urllib.urlretrieve(imgurl,'%s.jpg' % x)
        x+=1

html = getHtml("http://tieba.baidu.com/p/5020321663")

print getImg(html)