[Python-ideas] Add from __experimental__ import bla [was: Should we move to replace re with regex?]
ron3200 at gmail.com
Mon Aug 29 00:05:03 CEST 2011
On Sun, 2011-08-28 at 10:10 -0700, Guido van Rossum wrote:
> The main difference between experimental and regular status in the
> stdlib is that for experimental modules we reserve the right to make
> incompatible changes in subsequent versions (possibly even in bugfix
> releases, although that's worth a separate discussion).
> An experimental feature in the stdlib also signals a certain
> commitment from the core developers. We shouldn't use experimental as
> a dumping ground for random stuff; that's what PyPI is for. We should
> use experimental within the context of the stdlib.
It looks to me, that Importing from __future__ can do things that a
regular import can't do, like add or change core syntax. So they tend
to be python core features rather than library features.
The term __experimental__ may have differing expectations to different
people and may be a little too broad.
I like __future__ for *early* core changes, and __lib_future__ or
__sdtlib_future__, for early stdlib features.
I describe them as "early" because they either aren't quite ready for
the current release cycle or they are waiting for something else to be
depreciated or done before they can included.
I think It makes sense to split core and library future features this
way because usually, future core features are built into the core,
while a future standard library module can be imported from the disk.
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