text: import urllib3
  import cookielib
  from bs4 import BeautifulSoup
  #设置代理IP
  proxy_support = urllib3.ProxyHandler({'http':'120.197.234.164:80'})
  #设置cookie
  cookie_support = urllib3.HTTPCookieProcessor(cookielib.LWPCookieJar())
  opener = urllib3.build_opener(proxy_support,cookie_support,urllib.HTTPHandler)
  urllib3.install_opener(opener)
  #开始的URL
  #hosturl = "http://www.renren.com"
  hosturl = "http://mail.163.com/"
  #接受表单数据的URL
  #posturl = "http://www.renren.com/ajaxLogin/login"
  posturl = "https://mail.163.com/entry/cgi/ntesdoor?df=mail163_letter&from=web&funcid=loginone&iframe=1&language=-1&passtype=1&product=mail163&net=e&style=-1&race=118_35_39_bj&uid=Thinkgamer@163.com"
  #发送表单数据
  postdata = urllib.urlencode(
    {
    "username":"xxxxxxxxxxx",
    "password":"xxxxxxxxxxxxxxx"
    }
  )
  #设置表头
  headers = {
    #'User-Agent':'Mozilla/5.0 (Windows NT 6.3; WOW64; rv:40.0) Gecko/20100101 Firefox/40.0/',
    #'Referer':'http://www.renren.com/'
    'User-Agent':"Mozilla/5.0 (Windows NT 6.3; WOW64; rv:41.0) Gecko/20100101 Firefox/41.0",
    'Referer':'http://mail.163.com/'
  }
  #生成HTTP请求
  req =urllib.Request(
    url = posturl,
    data = postdata,
    headers = headers
  )
  print(req)
  page = urllib.urlopen(req).read()
  print(page)
  listvalue = page.split(";")
  url = listvalue[0].split("op.location.href = ")[1]
  href = url[1:-1]
  print(href)
  soup = BeautifulSoup(urllib.urlopen(href))
  print(soup.title)