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Wed Aug 3 19:18:42 CEST 2005 · http://mail.python.org/pipermail/python-dev/2005-August/055116.html

So here's a radical proposal (hear the scratching of the finglernail
on the blackboard? :-).

Start with Brett's latest proposal. Goal: keep bare "except:" but
change it to catch only the part of the hierarchy rooted at
StandardError.

- Call the root of the hierarchy Raisable.
- Rename CriticalException to CriticalError
  (this should happen anyway).
- Rename ControlFlowException to ControlFlowRaisable
  (anything except Error or Exception).
- Rename StandardError to Exception.
- Make Warning a subclass of Exception.

I'd want the latter point even if the rest of this idea is rejected;
when a Warning is raised (as opposed to just printing a message or
being suppressed altogether) it should be treated just like any other
normal exception, i.e. StandardError.

-- 
--Guido van Rossum (home page: http://www.python.org/~guido/)

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Exception Reorganization for Python 3.0