Hi Sweskman,
On 08.01.14 10:06, Kristján Valur Jónsson wrote:
-----Original Message-----
From: [email protected] [mailto:stackless-
[email protected]] On Behalf Of Kristján Valur Jónsson
Sent: 8. janúar 2014 08:56
To: The Stackless Python Mailing List
Subject: Re: [Stackless] __future__ policy
"from __stackless__ import nonlocal"
does not help one part of what we are trying to achieve, allow polyglot code
between 2.x and 3 to use nonlocal.
Because for the module that uses this code to work, you'd have to have to
run it in either stackless 2.8 or a new version of stackless 3.4 or whatever.
i.e.
you'd be tying your code to stackless, even if It were not doing any stackless
related stuff.
Ok, I see now that you could also be providing a __stackless__.py module to
deal with the default 3.x case.
Still, a very cludgy proposition.
Yep. For me, it seems to be cleanest/simplest for now to extend __future__,
and make a matching stackless 3.x that adds exactly those as no-ops.
Python 3.4 can follow the patch, or we change things.
I think that will not be so problematic, since the compat header is at the
front of the module, and semi-auto-conversion would be possible.
I wonder how cPython would view adding no-op codes to the 3.4 __future__ module
at this stage?
What would we like to propose? nonlocal and yield_from are the obvious
candidates
Maybe also a bit about str/unicode, see
https://github.com/PythonCharmers/python-future/issues/27
Actually we should connect to http://python-future.org/ to find out more.
Furthermore, something we need to add is support for metaclasses.
Right now you need to do quite nasty tricks to make things work,
see the SIX module. It is actually impossible to directly use metaclasses
without a syntax error.
cheers - chris
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