#coding:utf-8

 import urllib2,cookielib

 if __name__ == '__main__':

     root_url='https://www.baidu.com/'

     # 第一种

     print "第一种"

     response1=urllib2.urlopen(root_url)

     print response1.getcode()

     print len(response1.read())

     #第二种

     print "第二种"

     request=urllib2.Request(root_url)

     response2=urllib2.urlopen(request)

     print response2.getcode()

     print len(response2.read())

     # 第三种

     print "第三种"

     cj=cookielib.CookieJar()

     opener=urllib2.build_opener(urllib2.HTTPCookieProcessor(cj))

     urllib2.install_opener(opener)

     response3 = urllib2.urlopen(root_url)

     print response3.getcode()

     print "cookie为："+str(cj)

     print response3.read()