python2才有urllib2模块,python3把urllib和urllib2封装成了urllib模块
使用urllib2打开网页的三种方法
#coding:utf-8 import urllib2 import cookielib url="http://www.baidu.com" print '方法 1' response1=urllib2.urlopen(url) print response1.getcode()#验证打开网页是否成功,成功返回200 print len(response1.read())#打印读取网页长度 print'方法 2' request=urllib2.Request(url) request.add_header("user-agent","Mozilla/5.0")#伪装成浏览器 response2=urllib2.urlopen(request) print response2.getcode()#验证打开网页是否成功,成功返回200 print len(response2.read())#打印读取网页长度 print '方法 3' cj=cookielib.CookieJar() opener=urllib2.build_opener(urllib2.HTTPCookieProcessor(cj)) urllib2.install_opener(opener) response3=urllib2.urlopen(url) print response3.getcode()#验证打开网页是否成功,成功返回200 print cj print len(response3.read())#打印读取网页长度