Exceptional inheritance patterns (was Re: [Python-Dev] Python in Unicode context) (original) (raw)

Aahz aahz at pythoncraft.com
Thu Aug 5 17:26:45 CEST 2004

On Thu, Aug 05, 2004, Holger Krekel wrote:

Guido van Rossum wrote:

(It will also break code that creates a class used as an exception that doesn't derive from Exception, but those should be shot. :-) Then i guess that searching down into a recursive structure and just raising an "i found it" result object up doesn't count as a use case in your book, right? It can avoid boilerplate code like return-if-not-None checks and I have used it for e.g. finding patterns in an AST-Tree.

In cases where I've done this, I've always inherited from Exception or a subclass. Is there any reason not to?

Aahz (aahz at pythoncraft.com) <*> http://www.pythoncraft.com/

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