python2 登录带验证码的页面

#!/usr/bin/python
#-*- coding: utf-8 -*-

import os,json;
import urllib,urllib2;
import cookielib;

#获取cookie
#声明一个CookieJar对象实例来保存cookie
cookie = cookielib.CookieJar()
#利用urllib2库的HTTPCookieProcessor对象来创建cookie处理器
handler=urllib2.HTTPCookieProcessor(cookie)
#通过handler来构建opener
opener = urllib2.build_opener(handler)
#此处的open方法同urllib2的urlopen方法，也可以传入request
response = opener.open('web地址')
#agent标识
user_agent = {'User-Agent':'Mozilla/4.0 (compatible; MSIE 5.5; Windows NT)'}

#登录
while True:
    #获取验证码
    opener = urllib2.build_opener(urllib2.HTTPCookieProcessor(cookie))
    req_url='验证码地址'
    req=urllib2.Request(url=req_url,headers=user_agent)
    content=opener.open(req)
    
    
    imgpath="code.jpg"
    picture=content.read()
    with open(imgpath,"wb") as fp:
        fp.write(picture)
    
    #弹出验证码图片
    os.system("%s/%s"%(os.path.abspath('.'),imgpath))

#输入验证码
    req_url='登录地址'
    code=raw_input("输入验证码:")
    if code == '':
        print("验证码不能为空")
        continue
    print(code)
    #验证
    req_data_dict={'username':'账号','password':'密码','code':code}
    req_data=urllib.urlencode(req_data_dict)
    req=urllib2.Request(url=req_url,data=req_data,headers=user_agent)
    content=opener.open(req)
    login=json.loads(content.read())
    if int(login[u'ok']) == 1:
        print(cookie)
        print('登录成功')
        break
    else:
        print(login)
        print("验证码错误")

#参考以下资料

http://python.jobbole.com/81344/

https://www.cnblogs.com/xiaoxi-3-/p/7586072.html

http://blog.csdn.net/liuyuan_jq/article/details/69524279