# -*- coding:utf-8 -*-import urllib2import cookieliburl = 'http://wwww.baidu.com'print "方法1"response1 = urllib2.urlopen(url)print response1.getcode()print len(response1.read())print "方法2"request = urllib2.Request(url)request.add_header('user-agent', 'Mozilla/5.0')response2 = urllib2.urlopen(request)print response2.getcode()print len(response2.read())print "方法3"cj = cookielib.CookieJar()ck_process = urllib2.HTTPCookieProcessor(cj)opener = urllib2.build_opener(ck_process)urllib2.install_opener(opener)response3 = urllib2.urlopen(url)print response3.getcode()print cj