python3对urllib和urllib2进行了重构,拆分成了urllib.request,urllib.response, urllib.parse, urllib.error等几个子模块,这样的架构从逻辑和结构上说更加合理。urllib库无需安装,python3自带。python 3.x中将urllib库和urilib2库合并成了urllib库。 其中
urllib2.urlopen() 变成了 urllib.request.urlopen()
urllib2.Request() 变成了 urllib.request.Request()
python2中的 cookielib 改为 http.cookiejar.
import http.cookiejar 代替 import cookielib
urljoin 现在对应的函数是 urllib.parse.urljoin
import urllib.request import http.cookiejar url ="http://www.baidu.com" print ('第一种方法') response1=urllib.request.urlopen(url) print (response1.getcode()) print (len(response1.read())) print ('第二种方法') request=urllib.request.Request(url) request.add_header("user-agent","Mozilla/5.0")#将爬虫伪装成浏览器 response2=urllib.request.urlopen(request) print (response2.getcode())#打印状态码 print (len(response2.read()))#打印内容长度 print ('第三种方法') cj = http.cookiejar.CookieJar() opener = urllib.request.build_opener(urllib.request.HTTPCookieProcessor(cj)) urllib.request.install_opener(opener) response3=urllib.request.urlopen(url) print (response1.getcode()) print (cj) #输出cookie print (response1.read())
参考链接:https://blog.csdn.net/weixin_43550140/article/details/84563205