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Thu Aug 5 13:29:28 CEST 2004 · https://mail.python.org/pipermail/python-dev/2004-August/046860.html

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. 

cheers, 

    Holger

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