python3 模拟登录网站 一直验证码错误问题

苍天之罪

import requests
from PIL import Image
import time
import chardet
import urllib
import urllib.request
import urllib.parse


def get_image(url): #下载图片
    request = urllib.request.Request(url)#构建请求
    response = urllib.request.urlopen(request)#获取服务器响应
    get_img = response.read()                #读取图片
    with open("mftext.jpg","wb") as fp:
        fp.write(get_img)
        print("图片下载完成")
    return


headers = {
    "Accept": "application/json, text/javascript, */*; q=0.01",
    "Accept-Encoding":"gzip, deflate",
    "Accept-Language":"zh-CN,zh;q=0.9",
    "Connection":"keep-alive",
    "Content-Length":"50",
    "Content-Type":"application/x-www-form-urlencoded; charset=UTF-8",
    "User-Agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36",
    "Host":"www.mf178.cn",
    "Origin":"http://www.mf178.cn",
    "Referer":"http://www.mf178.cn/",
    "X-Requested-With":"XMLHttpRequest",
}
get_image("http://www.mf178.cn/login/captcha")
img=Image.open("mftext.jpg")
img.show()
vcode = input("请输入验证码:")
ddata = "username=" + str("账号") + "&password=" + str("密码") + "&vcode=" + str(vcode)
s1 = requests.post("http://huafei.91yunma.cn/login/index",data=ddata,headers=headers)
print("请求状态码:" + str(s1.status_code))
print(s1.headers["Set-Cookie"])
print(s1.json())

如常

带上图片的 cookie