#encoding:utf-8

import urllib
import urllib2
import cookielib
from bs4 import BeautifulSoup

filename = ‘cookie_csdn.txt‘
#聲明一個MozillaCookieJar對象實例來保存cookie，之後寫入文件
cookie = cookielib.MozillaCookieJar(filename)
#利用urllib2庫的HTTPCookieProcessor對象來創建cookie處理器
handler = urllib2.HTTPCookieProcessor(cookie)
#通過handler來構建opener
opener = urllib2.build_opener(handler)

loginUrl = "https://passport.csdn.net/account/login?from=http://my.csdn.net/my/mycsdn"

#登陸前準備：獲取lt和exection
response = opener.open(loginUrl)
soup = BeautifulSoup(response.read())
for input in  soup.form.find_all("input"):
    if input.get("name") == "lt":
        lt = input.get("value")
    if input.get("name") == "execution":
        execution = input.get("value")


#post信息
postdata = {
        "username":"[email protected]",
        "password":"xxxxxx",
        "lt":lt,
        "execution":execution,
        "_eventId":"submit"
    }
postdata = urllib.urlencode(postdata)

opener.addheaders = [("User-Agent","Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.63 Safari/537.36")]

#模擬登錄,保存cookie到cookie.txt中
result = opener.open(loginUrl, postdata)
#保存cookie
cookie.save(ignore_discard=True, ignore_expires=True)
#登陸後我們隨意跳轉到博客獲取內容
url = "http://blog.csdn.net"
response = opener.open(url)

#讀取內容保存到html文件中，方便查看
f = open(‘csdn_index.html‘, ‘w‘)
f.write(response.read());
f.close()
print ‘ok‘

Python模擬登錄csdn代碼