URLError#

import urllib.request
import urllib.parse
import urllib.error

url='http://www.maodan.com/'#没有这个域名的情况下，链接服务器不成功#

try:
response=urllib.request.urlopen(url)
print(response)
except Exception as e:#Exception可以精确捕获任何的异常#
print(e)

———————————————————————————————————————

URLError#

import urllib.request
import urllib.parse
import urllib.error

url='http://www.maodan.com/'#没有这个域名的情况下#

try:
response=urllib.request.urlopen(url)
print(response)
except urllib.error.URLError as e:#urllib.error.URLError也可以精确捕获任何的异常#
print(e)

———————————————————————————————————————

URLError#

HTTPError#

import urllib.request
import urllib.parse
import urllib.error

url='https://bbs.csdn.net/topics/39231478'#URL输入性错误#

try:
response=urllib.request.urlopen(url)
print(response)
except urllib.error.HTTPError as e:#HTTPError属于URLError的子项#
print(e)
print(e.code)#HTTP的状态码#
except urllib.error.URLError as e:
print(e)