自动登录京东网，基于requests、pyquery。

login_jingdong.py

# -*- coding: utf-8 -*-
import requests
from pyquery import PyQuery as pq

login_url = "https://passport.jd.com/new/login.aspx"
login_post_url = "http://passport.jd.com/uc/loginService"

# 用户名和密码
username = "your_name"
password = "your_password"

header_info = {
    'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/30.0.1581.2 Safari/537.36',
    'Connection': 'keep-alive',
}

# 创建会话
s = requests.Session()
s.headers = header_info
login_page_content = s.get(login_url)
d = pq(login_page_content.text)

# 获得随机数据
uuid = d("#uuid").attr("value")
left = d('#formlogin input[type="hidden"]:eq(4)').attr("name")
right = d('#formlogin input[type="hidden"]:eq(4)').attr("value")

# 获取验证码
auth_img_url = d('#JD_Verification1').attr("src2")
img_name = 'authcode.jpg'
r = s.get(auth_img_url)
with open(img_name, 'wb') as f:
    for chunk in r.iter_content(chunk_size=1024):
        f.write(chunk)

# 手动填写验证码
authcode = raw_input("please input the authcodde:")
authcode = str(authcode)

# post数据
login_data = {
    "loginname": username,
    "nloginpwd": password,
    "loginpwd": password,
    "uuid": uuid,
    left: right,
    'authcode': authcode,
    "chkRememberMe": "on"
}

x = s.post(login_post_url, data=login_data)
print(x.text)

# 获得({"success":"http://www.jd.com"}) ，表示登录成功。