[Python-Dev] Pre-PEP: Exception Reorganization for Python 3.0

[Brett Cannon]

OK, I withdraw the suggestion of the subclassing of SystemError by SystemExit.

-Brett

On 7/29/05, Guido van Rossum <gvanrossum at gmail.com> wrote:
> On 7/29/05, Robert Brewer <fumanchu at amor.org> wrote:
> > >     +-- SystemExit
> > >     +-- SystemError (subclass SystemExit?)
> >
> > I'd recommend not subclassing SystemExit--there are too many programs
> > out there which expect the argument (e.g. sys.exit(3)) to mean something
> > specific, but that expectation doesn't apply at all to SystemError.
> 
> Agreed. SystemExit is used by sys.exit(); SystemError is something
> completely different, used by the interpreter when it finds an
> internal invariant is broken. It is one step short of a fatal error --
> the latter is used when we have evidence of random memory scribbling,
> the former when the interpreter is still intact.
> 
> --
> --Guido van Rossum (home page: http://www.python.org/~guido/)
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