can error messages be improved or can they be overridden ?

Steve Holden steve at holdenweb.com
Sun Feb 22 16:14:24 CET 2009


Barak, Ron wrote:
> Hi Stef,
> 
> You can do something like (not tested):
> 
> try: 
> 	self.Brick.Par [ self.EP[2] ]['FileName'] = filename
> except IndexError,e:
>                 msg = "%s: '%s %s %s %d" % (e.strerror,e.filename,self.EP,self.EP[2],len(self.Brick.Par))
>                 print msg
>  
Unfortunately this too can raise an IndexError if self.EP has less than
three elements ...

regards
 Steve

> Bye,
> Ron.
> 	
>> -----Original Message-----
>> From: Stef Mientki [mailto:stef.mientki at gmail.com] 
>> Sent: Sunday, February 22, 2009 15:43
>> To: python-list at python.org
>> Subject: can error messages be improved or can they be overridden ?
>>
>> hello,
>>
>> I often get an error message like this
>>
>>     self.Brick.Par [ self.EP[2] ]['FileName'] = filename
>> IndexError: list index out of range
>>
>> Now it would be very welcome,
>> if the error message specified which index is out of range, 
>> in this case e.g.,
>> - specifying the length of self.EP
>> - specifying the value of self.EP[2]
>> - specifying the length of self.Brick.Par etc..
>>
>> Is there a way to override the error message and provide this 
>> information, or is it impossible ?
>>
>> And if it's possible, am I the only one who often stumbles 
>> about this problem ?
>> (I expect many people must have bounced in this problem before me ;-)
>>
>> thanks,
>> Stef Mientki
>>
>>
>>
> --
> http://mail.python.org/mailman/listinfo/python-list
> 


-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC              http://www.holdenweb.com/




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