怎样用Python设计一个爬虫模拟登陆知乎

两种方法：

1. 带cookielib和urllib2

   import urllib2

   import urllib

   import cookielib

   
   def login():

          email = raw_input("请输入用户名:")

           pwd = raw_input("请输入密码:")
          data={"email":email,"password":pwd} 
         post_data=urllib.urlencode(data)  
         cj=cookielib.CookieJar()
         opener=urllib2.build_opener(urllib2.HTTPCookieProcessor(cj))
   headers ={"User-agent":"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1"}
   website = raw_input('请输入网址:')
   req=urllib2.Request(website,post_data,headers)
   content=opener.open(req)
   print content.read()  

   
   

2. 使用selenium

   import selenium import webdriver

   browser=webdriver.Firefox()

   browser.get("Url")

   browser.find_element_by_id("    ").sendkey("username")

   browser.find_element_by_id("    ").sendkey("pass")

   browser.find_element_by_id("   ").click()
   

3.