!/usr/bin/python

-- coding=utf-8 --

import HTMLParser
import urlparse
import urllib
import urllib2
import cookielib
import string
import mechanize
import requests
import re
from bs4 import BeautifulSoup
import sys
reload(sys)
sys.setdefaultencoding('utf-8')
br = mechanize.Browser()
signin_url = "http://auth.iiyi.com/?referer=http%3A%2F%2Fwww.iiyi.com%2F"
logininfo = {"username": "zzdaye@163.com",

         "password": "xxxxx",
         "auto": "0",
         "vcode":''
         }

post_headers = {

"Accept":"text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8",
"Accept-Encoding":"gzip, deflate, sdch",
"Accept-Language":"zh-CN,zh;q=0.8",
"Cache-Control":"max-age=0",
"Cookie":"CNZZDATA30049871=cnzz_eid%3D848192274-1440660023-http%253A%252F%252Fiapi.iiyi.com%252F%26ntime%3D1440660023; CNZZDATA30080017=cnzz_eid%3D510248445-1440659800-http%253A%252F%252Fiapi.iiyi.com%252F%26ntime%3D1440659800; __utmt=1; __utma=1.655674906.1440664447.1440664447.1440664447.1; __utmb=1.1.10.1440664447; __utmc=1; __utmz=1.1440664447.1.1.utmcsr=iapi.iiyi.com|utmccn=(referral)|utmcmd=referral|utmcct=/v1/tnav; Hm_lvt_f6462c453d025b6235ffc49efab63e1e=1440664447; Hm_lpvt_f6462c453d025b6235ffc49efab63e1e=1440664447",
"Host":"auth.iiyi.com",
"If-Modified-Since":"Thu, 27 Aug 2015 08:34:03 GMT",
"Proxy-Connection":"keep-alive",
"Referer":"http://iapi.iiyi.com/v1/tnav?site=mh&0.6716969721019268&op=logout&referer=http%3A%2F%2Fwww.iiyi.com%2F",
"Upgrade-Insecure-Requests":"1",
"User-Agent":"Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.155 Safari/537.36",
}

coursera_session = requests.Session()
loginres = courserasession.post(signinurl,data=logininfo,headers=postheaders,)
if loginres.statuscode == 200:

print "Login Successfully!"

else:

print login_res.text

这是返回的是login successfully
但是之后我加上以下代码：
cookie = cookielib.CookieJar()
opener = urllib2.build_opener(urllib2.HTTPCookieProcessor(cookie))
urllib2.install_opener(opener)
抓取到的还是未登录的页面，求问是什么情况