[Python-Dev] Pre-PEP: Exception Reorganization for Python 3.0
mal at egenix.com
Tue Aug 2 12:07:57 CEST 2005
Nick Coghlan wrote:
> I have a Python 2.5 candidate hierarchy below, which uses dual inheritance to
> avoid breaking backward compatibility - any existing except clauses will catch
> all of the exceptions they used to catch. The only new inheritance introduced
> is to new exceptions, also avoiding backward compatibility problems, as any
> existing except clauses will let by all of the exceptions they used to let by.
> There are no removals, but the deprecation process is started in order to
> change the names of ReferenceError and RuntimeWarning to WeakReferenceError
> and SemanticsWarning.
I like this approach of using multiple inheritence to solve the
b/w compatibility problem.
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