Barry A. Warsaw <ba...@python.org> added the comment:

@Sandro:

>> FTR, for Debian and derivatives, doko chose to use 'linux2' when building on 
>> linux3.

>Luckily that has just been reverted.

No, I don't think it has: 
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=633015

On Debian Wheezy and Ubuntu 11.10:

$ python2.7 -c 'import sys; print sys.platform'
linux2
$ python3.2 -c 'import sys; print(sys.platform)'
linux2

oneiric$ uname -a
Linux resist 3.0.0-8-generic #11-Ubuntu SMP Fri Aug 12 20:23:58 UTC 2011 x86_64 
x86_64 x86_64 GNU/Linux
wheezy$ uname -a
Linux chemistry 3.0.0-1-amd64 #1 SMP Sun Jul 24 02:24:44 UTC 2011 x86_64 
GNU/Linux

I agree with MvL that Python 3.3 should set sys.platform to 'linux' and all 
stable releases should be patched to return 'linux2' on MACHDEP='linux3' 
systems.  configure.in already special cases cygwin* and darwin* to the 
major-version-number-less platform string, so this doesn't seem like much of a 
stretch to me for linux.  Since applications/libraries that already test 
against literal sys.platform values will be broken no matter what we do (except 
perhaps retain 'linux2' for perpetuity, which doesn't seem like a good idea), I 
think we should make a clean break from the major version number in Python 3.3 
and keep backward compatibility for released Pythons.  Seems like the least 
worst option to me.

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