On Sat, Feb 26, 2011 at 8:51 AM, Darren Dale <dsdal...@gmail.com> wrote:
> On Sat, Feb 26, 2011 at 9:23 AM, Pauli Virtanen <p...@iki.fi> wrote: > > On Sat, 26 Feb 2011 07:29:55 -0500, Michael Droettboom wrote: > > [clip] > >> Yes. The minimum version for this Python 3.x compatibility work is > >> Python 2.6. Anything earlier is just insane ;) > > > > Out of curiosity: did you consider using a single source tree for Python > > 2.x and 3.x, rather than a separate branch; providing Python 3 support by > > running 2to3 on build stage and #ifdef's + compatibility headers in C > > code? > > > > This approach allowed Numpy to support Pythons down to 2.4 with little > > extra work, and requires manual Python 3 specific fixes only when > > something breaks (which does not seem to occur often in practice). > > At some point, it will make sense to discontinue support for > <=python-2.5 (maybe even 2.6). I have used numpy's 2to3 for my > quantities project (admittedly a *much* smaller project with *much* > smaller exposure), but recently dropped backwards compatibility and > now 2.6-3.2 are supported in a single branch without use of 2to3. I > prefer this approach, it seems to be working out without too much > trouble so far. > > Darren > > My personal rule-of-thumb for what to support for scientific packages is whichever version of python is in the latest RHEL. Python 2.6 is in RHEL6, so I feel that is a reasonable minimum. Supporting python 2.4 (from RHEL5) is probably too onerous at this point. Ben Root
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