python-chinese at lists.python.cn，您好！

	      退订，谢谢，水太大了。

　　　　　　　　致
礼！
 				

　　　　　　　　liushan_snail
　　　　　　　　liushan_snail at sjtu.edu.cn
　　　　　　　　　　2005-02-21

hw_cg，您好！

谢谢，你这样一说，我清楚了很多。
但是ftplib为什么做了一个all_error，httplib就没有呢？

在 2005-02-21 14:21:00 您写道：
>cry: 你好!
>
>借鉴其他语言的异常思想,不是这样写捕获语句的.
>你的捕获机制不完善,导致你漏掉了一些异常.
>
>建议你的异常捕获象下面这样分级捕获, 每个异常捕获语句仅捕获自己感兴趣的异常,
>最后使用Exception捕获所有未拦截的异常.
>
>import httplib
>import socket
>
>try:
>    conn = httplib.HTTPConnection("127.0.0.1:8080")
>    conn.request("GET", "/")
>    response = conn.getresponse()
>    result = response.read()
>    print result
>    conn.close()
>
>except socket.error, msg:
>    print msg
>    # do something other
>
>except httplib.HTTPException,msg:
>    print msg
>    # do something other
>
>except Exception, msg:
>    print msg
>    # do something other
>
>
>
>
>----- Original Message ----- 
>From: "cry" <zyqmail at 163.net>
>To: "limodou, python-chinese at lists.python.cn" <limodou at gmail.com,python-chinese at lists.python.cn>
>Sent: Monday, February 21, 2005 1:26 PM
>Subject: Re: Re: [python-chinese] ???′μ?μ?httplib μ?òì3￡??￡?
>
>
>limodou，您好！
>
>直接用except:当然是没有问题，但是我需要错误信息呀，比如：
>except error,msg:
>
>
>在 2005-02-21 12:22:00 您写道：
>>捕获Exception 不要httplib.HTTPException 试试
>>
>>
>>On Mon, 21 Feb 2005 12:5:36 +0800, cry <zyqmail at 163.net> wrote:
>>> python，您好！
>>> 
>>> 我做了如下的代码：
>>> try:
>>>         conn = httplib.HTTPConnection("192.168.1.103")
>>>         conn.request("GET", "/")
>>>         response = conn.getresponse()
>>>         result = response.read()
>>>         conn.close()
>>>  except httplib.HTTPException , msg:
>>>         print msg
>>> 
>>> 运行后：
>>> Traceback (most recent call last):
>>>   File "", line 3, in ?
>>>   File "I:\Python23\lib\httplib.py", line 718, in request
>>>     self._send_request(method, url, body, headers)
>>>   File "I:\Python23\lib\httplib.py", line 739, in _send_request
>>>     self.endheaders()
>>>   File "I:\Python23\lib\httplib.py", line 712, in endheaders
>>>     self._send_output()
>>>   File "I:\Python23\lib\httplib.py", line 597, in _send_output
>>>     self.send(msg)
>>>   File "I:\Python23\lib\httplib.py", line 564, in send
>>>     self.connect()
>>>   File "I:\Python23\lib\httplib.py", line 532, in connect
>>>     socket.SOCK_STREAM):
>>> error: (10060, 'Operation timed out')
>>> 
>>> 错在那里呢？我怎么能控制httplib的exception呢？
>>> 我这样处理ftplib就可以。
>>> 
>>> 谢谢。
>>> 
>>>                     致
>>> 礼！
>>> 
>>>             cry
>>>             zyqmail at 163.net
>>> 
>>> _______________________________________________
>>> python-chinese list
>>> python-chinese at lists.python.cn
>>> http://python.cn/mailman/listinfo/python-chinese
>>> 
>>
>>
>>-- 
>>I like python! 
>>My Blog: http://www.donews.net/limodou
>>New Maillist: http://groups-beta.google.com/group/python-cn
>>_______________________________________________
>>python-chinese list
>>python-chinese at lists.python.cn
>>http://python.cn/mailman/listinfo/python-chinese
>
>                    致
>礼！
>
>            cry
>            zyqmail at 163.net
>
>
>_______________________________________________
>python-chinese list
>python-chinese at lists.python.cn
>http://python.cn/mailman/listinfo/python-chinese_______________________________________________
>python-chinese list
>python-chinese at lists.python.cn
>http://python.cn/mailman/listinfo/python-chinese

                    致
礼！

            cry
            zyqmail at 163.net

hw_cg,您好！

	  补充一点:千万不要在一个接口中捕捉所有异常,只捕捉此接口(或函数或方法)可以处理的异常,
对不能合理处理的异常,应该抛出,留给调用者处理,否则和业务有关的具体异常就无法正确处理
比如象这样的代码就不好:
except Exception, msg:
    print msg
    # do something other
捕捉了所有异常,记住:本级不能合理处理的异常,抛出给调用者处理

======= 2005-02-21 14:21:29 您在来信中写道：=======

>cry: 你好!
>
>借鉴其他语言的异常思想,不是这样写捕获语句的.
>你的捕获机制不完善,导致你漏掉了一些异常.
>
>建议你的异常捕获象下面这样分级捕获, 每个异常捕获语句仅捕获自己感兴趣的异常,
>最后使用Exception捕获所有未拦截的异常.
>
>import httplib
>import socket
>
>try:
>    conn = httplib.HTTPConnection("127.0.0.1:8080")
>    conn.request("GET", "/")
>    response = conn.getresponse()
>    result = response.read()
>    print result
>    conn.close()
>
>except socket.error, msg:
>    print msg
>    # do something other
>
>except httplib.HTTPException,msg:
>    print msg
>    # do something other
>
>except Exception, msg:
>    print msg
>    # do something other
>
>
>
>
>----- Original Message ----- 
>From: "cry" <zyqmail at 163.net>
>To: "limodou, python-chinese at lists.python.cn" <limodou at gmail.com,python-chinese at lists.python.cn>
>Sent: Monday, February 21, 2005 1:26 PM
>Subject: Re: Re: [python-chinese] ÔõôµÃµ½httplib µÄÒì³£ÄØ£¿
>
>
>limodou，您好！
>
>直接用except:当然是没有问题，但是我需要错误信息呀，比如：
>except error,msg:
>
>
>在 2005-02-21 12:22:00 您写道：
>>捕获Exception 不要httplib.HTTPException 试试
>>
>>
>>On Mon, 21 Feb 2005 12:5:36 +0800, cry <zyqmail at 163.net> wrote:
>>> python，您好！
>>> 
>>> 我做了如下的代码：
>>> try:
>>>         conn = httplib.HTTPConnection("192.168.1.103")
>>>         conn.request("GET", "/")
>>>         response = conn.getresponse()
>>>         result = response.read()
>>>         conn.close()
>>>  except httplib.HTTPException , msg:
>>>         print msg
>>> 
>>> 运行后：
>>> Traceback (most recent call last):
>>>   File "", line 3, in ?
>>>   File "I:\Python23\lib\httplib.py", line 718, in request
>>>     self._send_request(method, url, body, headers)
>>>   File "I:\Python23\lib\httplib.py", line 739, in _send_request
>>>     self.endheaders()
>>>   File "I:\Python23\lib\httplib.py", line 712, in endheaders
>>>     self._send_output()
>>>   File "I:\Python23\lib\httplib.py", line 597, in _send_output
>>>     self.send(msg)
>>>   File "I:\Python23\lib\httplib.py", line 564, in send
>>>     self.connect()
>>>   File "I:\Python23\lib\httplib.py", line 532, in connect
>>>     socket.SOCK_STREAM):
>>> error: (10060, 'Operation timed out')
>>> 
>>> 错在那里呢？我怎么能控制httplib的exception呢？
>>> 我这样处理ftplib就可以。
>>> 
>>> 谢谢。
>>> 
>>>                     致
>>> 礼！
>>> 
>>>             cry
>>>             zyqmail at 163.net
>>> 
>>> _______________________________________________
>>> python-chinese list
>>> python-chinese at lists.python.cn
>>> http://python.cn/mailman/listinfo/python-chinese
>>> 
>>
>>
>>-- 
>>I like python! 
>>My Blog: http://www.donews.net/limodou
>>New Maillist: http://groups-beta.google.com/group/python-cn
>>_______________________________________________
>>python-chinese list
>>python-chinese at lists.python.cn
>>http://python.cn/mailman/listinfo/python-chinese
>
>                    致
>礼！
>
>            cry
>            zyqmail at 163.net
>
>
>_______________________________________________
>python-chinese list
>python-chinese at lists.python.cn
>http://python.cn/mailman/listinfo/python-chinese_______________________________________________
>python-chinese list
>python-chinese at lists.python.cn
>http://python.cn/mailman/listinfo/python-chinese
>

= = = = = = = = = = = = = = = = = = = =
			

　　　　　　　　致
礼！
 
				 
　　　　　　　　jian wang
　　　　　　　　wangjian5748 at 163.com
　　　　　　　　　　2005-02-21

同理

liushan_snail <liushan_snail at sjtu.edu.cn> wrote:python-chinese at lists.python.cn，您好！

退订，谢谢，水太大了。

　　　　　　　　致
礼！


　　　　　　　　liushan_snail
　　　　　　　　liushan_snail at sjtu.edu.cn
　　　　　　　　　　2005-02-21
_______________________________________________
python-chinese list
python-chinese at lists.python.cn
http://python.cn/mailman/listinfo/python-chinese




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