[Xapian-discuss] Parallel installation of Python bindings

[Jens Dobberthin]

Maybe python eggs are a solution. One can install different versions
of a module and import it like that:

from pkg_resources import require
require("Xapian>=1.0")

or this way:
require("Xapian>0.9,!=0.9.1,<1.0")

more Information:
http://peak.telecommunity.com/DevCenter/PythonEggs

I'm using eggs (lxml, sqlalchemy) but I haven't build eggs yet, maybe
someone knows how build them or I will find some time in the next days
to do it....

Greetings, Jens.


2007/5/29, James Aylett <james-xapian at tartarus.org>:
> On Tue, May 29, 2007 at 12:23:43PM +0100, Richard Boulton wrote:
>
> > Thomas Waldmann asked me a question on IRC, about how to cope with
> > upgrading his application (MoinMoin) to use the latest version of Xapian
> > if available, but still work with the older releases (so that, for
> > example, users can just use the version of Xapian available from their
> > linux distribution), and, in particular, if other applications require a
> > older Xapian to be installed, how to avoid conflicts.
>
> I agree that this isn't practical to do. We're not intending to make
> backwards incompatible changes often enough to really need it (I hope
> :-).
>
> Incidentally, for MoinMoin although they're reasonably careful about
> getting dependencies with BC issues right, the entire thing still has
> a significant upgrade headache, because each time a new version comes
> out the processing and memory requirements go up, sometimes by
> incredible amounts. From memory, 1.1 to 1.3 (I think - it occurs to me
> that they are the version numbers of the Big SWIG Rewrite, so they
> might be wrong here) took us from a usable system to something that
> took minutes to load any page, on a machine that quite frankly should
> have been able to cope. (Upgrades since then have been easier, but
> we've been upgrading our hardware faster since then for other
> reasons.)
>
> Other projects don't even tend to worry about this sort of thing.
>
> J
>
> --
> /--------------------------------------------------------------------------\
>   James Aylett                                                  xapian.org
>   james at tartarus.org                               uncertaintydivision.org
>
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