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

[Guido van Rossum]

On Thu, Feb 2, 2012 at 3:41 PM, Nick Coghlan <ncoghlan at gmail.com> wrote:
> On Fri, Feb 3, 2012 at 9:32 AM, Yury Selivanov <yselivanov.ml at gmail.com> wrote:
>> In my opinion using Ellipsis is just wrong.  It is completely
>> non-obvious not only to a beginner, but even to an experienced
>> python developer.  Writing 'raise Something() from None'
>> looks less suspicious, but still strange.
>
> Beginners will never even see it (unless they're printing out
> __cause__ explicitly for some unknown reason). Experienced devs can go
> read language reference or PEP 409 for the rationale (that's one of
> the reasons we have a PEP process).

I somehow have a feeling that Yury misread the PEP (or maybe my +1) as
saying that the syntax for suppressing the context would be "raise
<exception> from Ellipsis". That's not the case, it's "from None".

-- 
--Guido van Rossum (python.org/~guido)