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List:       python-dev
Subject:    Re: [Python-Dev] PEP 408 -- Standard library __preview__ package
From:       Antoine Pitrou <solipsis () pitrou ! net>
Date:       2012-01-28 18:49:01
Message-ID: 1327776541.8904.5.camel () localhost ! localdomain
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Le samedi 28 janvier 2012 à 10:46 -0800, Mike Meyer a écrit :
> Antoine Pitrou <solipsis@pitrou.net> wrote:
> 
> >On Sat, 28 Jan 2012 13:14:36 -0500
> >Barry Warsaw <barry@python.org> wrote:
> >> On Jan 28, 2012, at 09:15 AM, Guido van Rossum wrote:
> >> 
> >> >So I do not support the __preview__ package. I think we're better
> >off
> >> >flagging experimental modules in the docs than in their name. For
> >the
> >> >specific case of the regex module, the best way to adoption may just
> >> >be to include it in the stdlib as regex and keep it there. Any other
> >> >solution will just cause too much anxiety.
> >> 
> >> +1
> >> 
> >> What does the PEP give you above this "simple as possible" solution?
> >
> >"I think we'll just see folks using the unstable APIs and then
> >complaining when we remove them, even though they *know* *upfront* that
> >these APIs will go away."
> >
> >That problem would be much worse if some modules were simply marked
> >"experimental" in the doc, rather than put in a separate namespace.
> >You will see people copying recipes found on the internet without
> >knowing that they rely on unstable APIs.
> 
> How. About doing them the way we do depreciated modules, and have them
> spit warnings to stderr?  Maybe add a flag and environment variable to
> disable that.

You're proposing that new experimental modules spit warnings when you
use them? I don't think that's a good way of promoting their use :)
(something we do want to do even though we also want to convey the idea
that they're not yet "stable" or "fully approved")

Regards

Antoine.


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