On 7/14/10 10:49 AM, Paul McNett wrote:
> On 7/14/10 10:42 AM, Jacek Kałucki wrote:
>> Użytkownik Paul McNett napisał:
>>>> It seems like first attribute was object instance, not a class.
>>>> Look at this:
>>>>
>>>> raise Exception('foo'), 'what now?'
>>>>
>>>> versus this:
>>>>
>>>> raise Exception('foo', 'what now?')
>>>>
>>>>
>>> So something somewhere has changed dabo.dException.NoRecordsException from
>>> a class
>>> into an instance?
>>>
>>
>> I doubt it, but maybe Python misinterpreted first attribute.
>> Did you try other platform or Python version (e.g. 2.6)?
>> Maybe you could put an breakpoint in this line and watch what happens.
>
> Problem is that this happened only for one customer out of many. I can't
> repro on my
> end.
Was finally able to reproduce on my end, and found the error. I've been bitten
by
this before but unfortunately my except block in this case only fires very
rarely and
I never hit it in my testing. Here's what I was doing:
133 try:
134 if lookup.getFieldVal(lookup.KeyField) != val:
135 lookup.moveToPK(val)
136 return self.DisplayFormat %
lookup.getDataSet(rowStart=lookup.RowNumber,
rows=1)[0]
137 except dabo.dException.RowNotFoundException,
dabo.dException.NoRecordsException:
138 return self.Application.NoneDisplay
Line 137 wants to catch two possible exceptions, not use
dabo.dException.NoRecordsException as the instance exception object! So that
line
should be:
137 except (dabo.dException.RowNotFoundException,
dabo.dException.NoRecordsException):
In my case it was other code in the same stackframe that was catching
NoRecordsException, and *that* code was complaining about "instance exception
may not
have a separate value", because dabo.dException.NoRecordsException was (during
this
stackframe at least) a dabo.dException.RowNotFound instance!
Python programs are usually very easy to debug, but this one had me flummoxed!
It was
difficult for me to find even after I could finally reproduce the error this
morning...
Anyway I wanted to follow up on this since it was still open.
Paul
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