[Distutils] setuptools: can I specify different install_requires for different python versions?

[Sridhar Ratnakumar]

On Tue, 28 Jul 2009 13:00:44 -0700, P.J. Eby <pje at telecommunity.com> wrote:

> [1] One way to implement conditional requirements is to make use of
> Requirement.extras. If setuptools/distribute supports builtin extras -
> such as Py26, Py27, Py30 and so forth .. even Py3x to cover all 3.x
> versions - then one can have a [<Py26] section in their install_requires
> that would specify requirements specific to versions below 2.6.
>  It would also need to support platform-specific requirements, and  
> possibly other options as well.

Yes. Perhaps this can be made extensible/special by requiring that such  
'special' sections start with a ':'. Example:

[:pyver<(2,6)]
multiprocessing<=2.2

[:platinfo.osname=windows]
wincurses

[:platinfo.osname=windows and platinfo.osarch=x64]
ssl64

where 'platinfo' is from http://code.google.com/p/platinfo/ (reason being:  
platform names has to be from a *standard* set of names .. lest people use  
whatever-comes-to-their-mind making it harder for some of us to,  
programmatically, read and understand their metadata).

>   which, however, means one has to run
> setup.py with all its silly hacks (raw_input() anyone?).
>  Ew.  Somebody actually did that?  Please identify the culprit so they  
> can be publicly shamed.

There are a handful .. and http://pypi.python.org/pypi/biopython is one of  
them.

-srid