[Python-Dev] PEP 409 update [was: PEP 409 - final?]

[Ethan Furman]

Guido van Rossum wrote:
> On Thu, Feb 2, 2012 at 6:49 PM, Nick Coghlan <ncoghlan at gmail.com> wrote:
>> On Fri, Feb 3, 2012 at 12:42 PM, Ethan Furman <ethan at stoneleaf.us> wrote:
>>> Nick Coghlan wrote:
>>>> FWIW, I expect the implementation will *allow* "raise exc from
>>>> Ellipsis" as an odd synonym for "raise exc".
>>>
>>> Are we sure we want that?  Raising from something not an exception seems
>>> counter-intuitive (None being the obvious exception).
>> It isn't so much a matter of wanting it as "Is it problematic enough
>> to put any effort into preventing it?" (since allowing it is a natural
>> outcome of the obvious implementation).
> 
> I would say yes we want that. It would be strange if you couldn't
> reset a variable explicitly to its default value. I don't expect
> people to do this often. But somebody might want to do a deep copy of
> an exception (with some systematic change), or there might be other
> reasons. I'm sure a few Python zen items apply here. :-)

Okey-doke, I'll get it going.

~Ethan~