用python写了一个csdn的模拟登录程序，运行失败了

# -*- coding:utf-8 -*-

import sys

from fileinput import filename

reload(sys)

sys.setdefaultencoding('utf-8')

# -*- coding:utf-8 -*-

import urllib

import urllib2

import re

import hashlib

import cookielib

import webbrowser



cookies = cookielib.CookieJar()

opener = urllib2.build_opener(urllib2.HTTPCookieProcessor(cookies))





loginurl = 'https://passport.csdn.net/account/login'

loginheaders = {

           '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',

           'Host':'my.csdn.net',

           'Proxy-Connection':'keep-alive',

           'Referer':'http://passport.csdn.net/account/login?from=http%3A%2F%2Fmy.csdn.net%2Fmy%2Fmycsdn',

           'User-Agent':'Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/38.0.2125.101 Safari/537.36',

           }



result = urllib2.urlopen(url = loginurl)

content = result.read().encode('UTF-8')

print content





pattern = re.compile('name="lt" value="(.*?)"')

match = re.search(pattern,content)

lt_code = match.group(1)

print lt_code



pattern = re.compile('name="execution" value="(.*?)"')

match = re.search(pattern,content)

execution_code = match.group(1)

print execution_code



postdata = urllib.urlencode({

            'username':'这里填我的用户名',

            'password':'这里填我的密码',

            'rememberMe':'true',

            'lt':lt_code,

            'execution':execution_code,

            'eventId':'submit',

            'l':'登 录',

         })



req = urllib2.Request(url = 'https://passport.csdn.net/account/login',data = postdata,headers = loginheaders)



result = opener.open(req)

content = result.read().encode('UTF-8')

print content