urllib和urllib2在python2以及python3的区别

1.python2

import urllib

import urllib2

共同点：都可以直接用urlopen（‘url’）请求页面

不同点：

urllib有urlencode（dict）和unquote（）进行编码和解码

对于error：

try:
    response = urllib2.urlopen("http://pythonsite.com/111341.html")
except urllib2.HTTPError as e:
    print(e.reason)
    print(e.code)
    print(e.headers)
except urllib2.URLError as e:
    print(e.reason)

else:
    print("reqeust successfully")

2.python3

请求页面：urllib.request.urlopen（‘url’）

对于error：

from urllib import request,error
try:
    response = request.urlopen("http://pythonsite.com/113211.html")
except error.HTTPError as e:
    print(e.reason)
    print(e.code)
    print(e.headers)
except error.URLError as e:
    print(e.reason)

else:
    print("reqeust successfully")