python爬贴吧图片下载到本地

#coding:utf-8
import requests
import re
import urllib
import os, sys
from bs4 import BeautifulSoup as bs

'''
作用：获取百度贴吧图片

'''
def get_content(url):
r = urllib.urlopen(url)
html = r.read()
r.close()
return html

html = get_content("http://tieba.baidu.com/p/5347937418")
url(http://tb2.bdstatic.com/tb/static-pb/img/cur_zin.cur), pointer;" src="http://imgsrc.baidu.com/forum/w%3D580/sign=af5797c0b9fb43161a1f7a7210a44642/96f8ce1b9d16fdfa3d6b31e5bf8f8c5494ee7b49.jpg" size="230432" changedsize="true">'
regex = r'class="BDE_Image".+?src="(.+?\.jpg)"'
pat = re.compile(regex)
list = re.findall(pat,html)
i = 0
os.mkdir("d://image")
for item in list:
urllib.urlretrieve(item,"d://image//%s.jpg" % i)
print i
i += 1