[Pytables-users] Policy for exception types?

[Norbert N. <Nor...@gm...>]

Hi there,

checking through the code of pytables, I fail to find much of a concept for 
which exception is thrown where. All the different standard exception types 
have well defined meanings:
 http://www.python.org/dev/doc/devel/lib/module-exceptions.html
but it seems to me that pytables does not really follow these too closely.

I'm mostly concerned about nonexistant objects. If I try to access/delete such 
an object in different contexts, I get all kinds of different exceptions, 
ranging from NameError over LookupError all the way to RuntimeError, where an 
AttributeError would seem most appropriate.

Following the documentation
* LookupError should never be used at all, since it is just the base for 
IndexError and KeyError.
* NameError is meant for global or local symbols that do not exist
* RuntimeError is just a fallback in cases where nothing else seems to fit.

Is this matter just not defined too well, yet or is there a hidden concept 
behind the current state of affairs, that I just fail to see?

Ciao,
Norbert

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_________________________________________Norbert Nemec
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