python 爬虫 进击的巨人

import urllib2
import os
import re

chapter = 1
while(chapter <= 69):

    dir = 'G:\\python data\\' + str(chapter)
    os.mkdir(dir)
    os.chdir(dir)
    URL = 'http://jj.xxdm.org/manhua/jjdjrmh/' + str(chapter) + '.shtml'
    response = urllib2.urlopen(URL).read()
    
    Urls = re.findall(r'/uploads/mh/jj/\d{3,5}/\d{2,4}\.\w{3}', response)
    page = 1
    for url in Urls:
        pic = urllib2.urlopen('http://pic.xxdm.com/' + url).read()
        print url
        with open(str(page) + '.jpg', 'wb') as f:
            f.write(pic)
        page = page + 1
    chapter = chapter + 1

用不来scrapy。最后没有用这个框架，反而简单很多。
但是很慢，真的特别慢。