异常处理

1、使用URLError进行异常处理

# -*- coding: UTF-8 -*-
from urllib import request
from urllib import error
if __name__ == "__main__":
     url = 'https://blog.csdn.net/asialee_bir'  #错误链接
     try:
        response=request.urlopen(url)
        file=response.read().decode('utf-8')
        print(file)
     except  error.URLError as e:
        print(e.code)
        print(e.reason)

异常结果:(403错误表示禁止访问)

 

 

2、使用HTTPError进行异常处理

# -*- coding: UTF-8 -*-
from urllib import request
from urllib import error
if __name__ == "__main__":
    url = 'https://blog.csdn.net/asialee_bir'  #错误链接
    try:
        response=request.urlopen(url)
        file=response.read().decode('utf-8')
        print(file)
    except error.HTTPError as e:
        print(e.code)    #返回状态码
        print(e.reason)

异常结果:(403错误表示禁止访问)

 

注意:URLError是HTTPError的父类

 

3、URLError和TTPError混合使用

# -*- coding: UTF-8 -*-
from urllib import request
from urllib import error
if __name__ == "__main__":
    url = 'https://blog.baidusss.net'  #不存在的链接
    try:
        response=request.urlopen(url)
        file=response.read().decode('utf-8')
        print(file)
    except error.URLError as e:
        if hasattr(e,'code'):   #使用hasattr()判断是否有这些属性
             print('HTTPError')
             print(e.code)
        if hasattr(e,'reason'):
             print('URLError')
             print(e.reason)