python爬取京东图片

import re
import urllib.request
def craw(url,page):
    html1=urllib.request.urlopen(url).read()
    html1=str(html1)
    pat1='<div id="plist".+? <div class="page clearfix">'
    result1=re.compile(pat1).findall(html1)
    result1=result1[0]
    pat2='<img width="220" height="220" data-img="1" data-lazy-img="//(.+?\.jpg)">'
    imagelist=re.compile(pat2).findall(result1)
    x=1
    for imageurl in imagelist:
        imagename="D:/Python35/myweb/"+str(page)+str(x)+".jpg"
        imageurl="http://"+imageurl
        try:
            urllib.request.urlretrieve(imageurl,filename=imagename)
        except urllib.error.URLError as e:
            if hasattr(e,"code"):
                x+=1
            if hasattr(e,"reason"):
                x+=1
        x+=1

for i in range(1,79):
    url="http://list.jd.com/list.html?cat=9987,653,655&page="+str(i)
    craw(url,i)