1.URLError

import urllib2

if name == ' main' :

url = 'http://www.567.com'req = urllib2.Request(url)try: response = urllib2.urlopen(req) #print response html = response.read().decode('utf-8') print htmlexcept urllib2.URLError as e : print e.reason结果 ：URLError

[Errno 11004] getaddrinfo failed

2.HTTPError

import urllib2

if name == 'main' :

url = 'http://money.163.com/stocks/'req = urllib2.Request(url)try: response = urllib2.urlopen(req) #html = response.read()except urllib2.HTTPError as e: print e.code 结果：404 3，URLError和HTTPError混合使用

    如果想用HTTPError和URLError一起捕获异常，那么需要将HTTPError放在URLError的前面，因为HTTPError是URLError的一个子类。如果URLError放在前面，出现HTTP异常会先响应URLError，这样HTTPError就捕获不到错误信息了。

一种方法：
import urllib2

if name == 'main' :

url = 'http://news.baidu.net'req = urllib2.Request(url)try : response = urllib2.urlopen(req) html = response.read().decode('utf-8') print htmlexcept urllib2.HTTPError as e: print 'HTTPError' print e.codeexcept urllib2.URLError as e: print 'URLError' print e.reason 二种方法使用函数hasattr()： if __name__ == '__main__' :url = 'http://www.567.com'req = urllib2.Request(url)try: response = urllib2.urlopen(req) html = response.read().decode('utf-8') print htmlexcept urllib2.URLError as e : if hasattr(e,'code') : print 'HTTPError' print e.code elif hasattr(e,'reason') : print 'URLError' print e.reason