python抓取网页图片

#!/usr/bin/env python
# -*- coding: utf-8 -*-
import urllib2
import re
url1 = "http://www.mmonly.cc/ktmh/hzw/list_34_2.html"
request = urllib2.Request(url1)
req = urllib2.urlopen(request)
buf = req.read()
url_list = re.findall(r‘src=\"http://t1.+?\.png‘, buf)#正则表达式
#for img_url in url_list:
#    print img_url[5:]

index = 1
for img_url in url_list:
    f = open(str(index)+‘.png‘,‘wb‘)
    img_req = urllib2.urlopen(img_url[5:])
    img_buf = img_req.read()
    f.write(img_buf)
    f.close()
    index +=1