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| Date | Sun, 24 Jun 2012 16:16:25 -0700 |
| From | Charles Hixson <charleshixsn@earthlink.net> |
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| Subject | Re: exception problem |
| References | <4FE79433.8020704@earthlink.net> <4FE7982C.5020708@mrabarnett.plus.com> |
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On 06/24/2012 03:43 PM, MRAB wrote:
> On 24/06/2012 23:26, Charles Hixson wrote:
>> The code:
>> print ("pre-chunkLine")
>> chunks = []
>> try:
>> chunks = self.chunkLine (l)
>> except:
>> print ("caught exception")
>> print (sys.exc_info()[:2])
>> finally:
>> print ("at finally")
>> print ("chunks =")
>> print (repr(chunks), ".", end = ":")
>> produces this result:
>> . . ., by
>> pre-chunkLine
>> caught exception
>> at finally
>> path 3...
>>
>> Any suggestions as to what's wrong with the code?
>> FWIW, chunkLine begins:
>> def chunkLine (self, line):
>> print ("chunkLine: ")
>> print ("line = ", line)
>> if line == None:
>> return []
>> assert (isinstance (line, str) )
>>
> Don't use a bare "except"; it'll catch _any__exception. Catch only what
> you expect.
>
> For all I know, it could be that the name "l" doesn't exist.
But what I wanted was to catch any exception. A problem was happening
and I had no clue as to what it was. (It turned out to be "self is not
defined". A silly mistake, but a real one.)
The odd thing was that if I ran it without the try block, I didn't get
any exceptions at all. (Which I clearly should have, except that since
self wasn't defined, I'd usually expect the interpreter to detect the
error before trying to execute the code.)
--
Charles Hixson
Back to comp.lang.python | Previous | Next — Next in thread | Find similar | Unroll thread
Re: exception problem Charles Hixson <charleshixsn@earthlink.net> - 2012-06-24 16:16 -0700
Re: exception problem Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-06-25 07:48 +0000
Re: exception problem Charles Hixson <charleshixsn@earthlink.net> - 2012-06-27 17:13 -0700
Re: exception problem alex23 <wuwei23@gmail.com> - 2012-06-27 17:36 -0700
Re: exception problem Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-06-28 03:44 +0000
Re: exception problem Ethan Furman <ethan@stoneleaf.us> - 2012-06-28 05:52 -0700
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