写了个小爬虫，为何用上代理ip总是出现错误。

 import urllib.request
 import re
 import os
 import random
 import threading

 def url_open(url):  #在第8到第12行，总是无法正常运行，代理Ip是从网上免费代理ip获取的。
     #ips = ['117.136.234.12:80', '218.189.26.20:8080','202.194.101.150:80','180.166.112.47:8888']

     #proxy = urllib.request.ProxyHandler({'http':random.choice(ips)})#{'http':'124.202.174.66:8118'}
     #opener = urllib.request.build_opener(proxy)
     #opener.addheaders = [('User-Agent','Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/30.0.1599.101 Safari/537.36')]

     #urllib.request.install_opener(opener)

     req = urllib.request.Request(url)

     req.add_header('User-Agent','Mozilla/5.0')
     urlobject = urllib.request.urlopen(req)
     response = urlobject.read()
     return response

 def find_page(html):
     s2 = r'\[\d{4}\]'
     m = re.search(s2, html)
     page = m.group()
     print("find_page")
     return page

 def find_page_link(html):
     s = r'http://ww[0-9].sinaimg.cn/mw600/\w+.jpg'
     m = re.findall(s, html)
     return m

 def save_page(jpg):
     for file in jpg:
         data = url_open(file)
         #print("wwwwwwwwww")
         name = "E:\\作业\\j_d\\"+file.split('/')[-1]
         with open(name, 'wb') as f:
             f.write(data)

 def down_jpg(dir_name='E:\作业\j_d', page=10, pages=10):
     #os.mkdir(dir_name)
     os.chdir(dir_name)
     #red = url_open('http://jandan.net/ooxx')
     #print(type(red))
     #red = red.decode('utf-8')

     #page = find_page(red)
     #page = int(page[1:-1])
     #page = 1333
     for i in range(pages):
         page += 1
         url = 'http://jandan.net/ooxx/page-'+str(page)+'#comments'
         print(url)
         data = url_open(url)
         data = data.decode('utf-8')
         print("dddddddddddddd")
         page_list = find_page_link(data)
         #print("sssssssssssssss")
         save_page(page_list)

 if __name__ == '__main__':
     p = threading.Thread(target=down_jpg,args=('E:\作业\j_d',1555,10))
     c = threading.Thread(target=down_jpg,args=('E:\作业\j_d',1024,10))
     #down_jpg()
     p.start()
     c.start()

     p.join()
     c.join()