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Fri Oct 9 20:32:05 CEST 2009 · https://mail.python.org/pipermail/python-dev/2009-October/092882.html

The *only* change in semantics I'm proposing is for users of  
IronPython 2.6 which is not even at final release yet. CPython users  
would be unaffected.

Sorry for top-posting, mobile device.

Michael

--
http://www.ironpythoninaction.com

On 9 Oct 2009, at 19:00, Brett Cannon <brett at python.org> wrote:

>
>
> On Fri, Oct 9, 2009 at 04:53, Michael Foord  
> <fuzzyman at voidspace.org.uk> wrote:
> Christian Heimes wrote:
> Michael Foord wrote:
>
> I really like this scheme. The important thing for IronPython is  
> that we can get it into Python 2.6 (along with other fixes to make  
> distutils compatible with IronPython - like not attempting to  
> bytecode-compile when sys.dont_write_bytecode is True).
>
>
> I don't think my proposal will land into 2.6. The changes are too  
> severe
> for a bug fix release.
>
>
> Right, certainly not adding umpteen new sys attributes. :-)
>
> The problem is that the alternative implementations run well behind  
> Python-trunk, indeed it doesn't really make sense for them to put a  
> lot of effort into implementing a version that is still in  
> development. The result is that they discover incompatibilites after  
> a version has gone into 'bugfix only' mode.
>
> Whilst the fix you have described (add information to sys that is  
> used by site.py and distutils) is ideal it can only go into 2.7. I  
> would *still* like to see a fix in 2.6 - even if it is simple logic  
> in site.py using sys.platform (if sys.platform == 'cli'; elif  
> sys.platform == 'java' etc). That way IronPython 2.6 is able to be  
> compatible with Python 2.6. This logic might need duplicating in  
> distutils (I haven't looked at how distutils works out where the  
> user site-packages folder is), but it is a 'maintenance only' fix.
>
> But it's still a change in semantics. Tossing this into 2.6 would  
> mean that anyone who has worked around the current behaviour is  
> going to have a busted install.
>
> -Brett
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[Python-Dev] PEP 370 and IronPython