Why is Python 2.7 dependent on db46 and only db46

[Vincent Habchi]

> On 21 Jul 2015, at 16:02, Brandon Allbery <allbery.b at gmail.com> wrote:
> 
> On Tue, Jul 21, 2015 at 10:00 AM, Clemens Lang <cal at macports.org> wrote:
> ----- On 21 Jul, 2015, at 15:43, Rainer Müller raimue at macports.org wrote:
> 
> > And even if the default +db* variant selection depends on the local
> > active db* version, I guess such a change would trigger more local
> > builds instead of using binary archives which should be preferred for
> > most users.
> 
> However, what we could do -- and I'd argue we should -- is choose a single
> "blessed" version of db and try to use it everywhere. Normally, that would
> just be the latest version.
> 
> Last I checked, upgrading existing data files was not automatic. 

And something approaching what we do with perl/python, that is using a generic port as a proxy for a chosen version?