python request load cookie请求

# !/usr/bin/env python
# -*- coding: utf-8 -*-
import urllib2
import urllib
import cookielib
import json
import httplib
import re
import requests
import os
import time
import requests, requests.utils, pickle
try:
    import cookielib  # 兼容Python2
except:
    import http.cookiejar as cookielib

s=requests.session()
print s.headers
from requests.packages.urllib3.exceptions import InsecureRequestWarning
requests.packages.urllib3.disable_warnings(InsecureRequestWarning)
s.cookies = cookielib.LWPCookieJar(filename="cookies.txt")
# with open('cook.txt', 'r') as f:
#    cookies = json.loads(f.read())
# print cookies

try:
    with open("cookies.txt", "r") as f:
        load_cookies = json.loads(f.read())
    s.cookies = requests.utils.cookiejar_from_dict(load_cookies)
    print s.get('https://oauth2.lvchengcaifu.com/').content
except:
 url = "https://oauth2.lvchengcaifu.com/login"
 headers={
    'User-Agent': 'Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:54.0) Gecko/20100101 Firefox/54.0',
    'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',

 }
 r= s.get(url,headers=headers,verify=False)
 r=r.text
 print r
 print type(r)
 r = r.encode('unicode-escape')
 print type(r)
 p = re.compile('.*_csrf"s+value="(.*?)".*')
 m = p.match(r)
 token = m.group(1)
 print token
 imgurl='https://oauth2.lvchengcaifu.com/Kaptcha.jpg'
 r = s.get(imgurl)
 r = r.content
 # print s
 print type(r)
 print r
 filename = 'E:image.jpg'
 local = open(filename, 'wb')
 local.write(r)
 local.close()
 print "登录二维码已经下载到本地" + "[" + filename + "]"

 ##打开图片
 os.system("start %s" % filename);
 code = raw_input('输入验证码： ')
 print code
 print len(code)

 ## <input type="hidden" id="_csrf" name="_csrf" value="6f772fd9-14da-40c4-b317-e8d9a4336203" />
 login_url='https://oauth2.lvchengcaifu.com/login/form'
 data = {'username': 'xx', 'password': 'xx@', '_csrf': token,'validCode':code}
 response = s.post(login_url, data=data,headers=headers)
 print  response.content
 aa=s.cookies
 print '-------------------------------------'
 print aa
 cookies = requests.utils.dict_from_cookiejar(s.cookies)
 with open("cookies.txt",'w') as fp:
    json.dump(cookies, fp)
 print(cookies)