下载给定网页上图片的方法

# -*- coding: utf-8 -*- 
import re 
import urllib 
def getHtml(url): 
#找出给出网页的源码 
page = urllib.urlopen(url) 
html = page.read() 
return html 

def getImg(html): 
#正则 
reg = r'src="(.*?\.jpg)"' 
#编译正则 
imgre = re.compile(reg) 
#找出图片地址 
imglist = re.findall(imgre,html) 
#循环遍历 
x = 0 
for i in imglist: 
urllib.urlretrieve(i,'%s.jpg' % x) 
x+=1 
html = getHtml(r'http://www.renren.com/') 
getImg(html)