python 学习 第一课

# -*- coding: utf-8 -*-
import urllib2
import cookielib
url="http://www.baidu.com"
print '第一种方 法'
response1=urllib2.urlopen(url)
print response1.getcode()
print len(response1.read())

print '第二种方法'
request=urllib2.Request(url)
request.add_header('user-agent', "Mozilla/5.0")
response2=urllib2.urlopen(request)
print response2.getcode()
print len(response2.read())

print '第三种方法'
cj=cookielib.CookieJar()
opener=urllib2.build_opener(urllib2.HTTPCookieProcessor(cj))
urllib2.install_opener(opener)
response3=urllib2.urlopen(url)
print response3.getcode()
print cj
response3.read()