[Python-3000] self-contained exceptions

[Collin Winter]

On 1/4/07, Guido van Rossum <guido at python.org> wrote:
> On 1/4/07, Phillip J. Eby <pje at telecommunity.com> wrote:
> > How about:
> >
> >       except ExcType, e:
> >           try:
> >               # body
> >           finally:
> >               e = None
> >               del e
> >
> > Then we get the best of all three worlds: a clean explanation, a clean
> > implementation, and a pure source-to-source transformation.
>
> Great! We need (a) an update to PEP 3100 and (b) a patch to implement
> this. (Once we have this we can talk about the rest of PEP 344;
> perhaps that PEP should also target Py3k only?)

I've just uploaded patch #1630248 to SF. This implements the
transformation (including test cases for the new behavior) and patches
all places in the stdlib that relied on the old behavior.

The transformation is as Phillip outlined above, with extra logic to
handle the case where e is a tuple or list.

Thanks,
Collin Winter