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[Python-Dev] GeneratorExit inheriting from Exception

Barry Warsaw barry at python.org
Sat Mar 18 16:51:44 CET 2006 
On Sat, 2006-03-18 at 16:50 +0100, Samuele Pedroni wrote:

> > I don't know whether this is possible for Python 2.5, 
> 
> well, one thing to consider is all the
> 
> class MyException(Exception):
> 
> in current code.

Yep, which is why I'm not sure we can do this for Py2.5.  However as PEP
352 talks about a transition plan for Py3k, I think we should document
the ultimate desired hierarchy (and maybe implement that in the p3yk
branch ;), and then think about how to transition to it in Py2.5.

One possible approach is to revert BaseException out of Py2.5,
re-position KeyboardInterrupt, and add Error as an alias for
StandardError.  Then we can encourage people to start using Error as the
base classes for their own errors.

-Barry

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