On Mon, 30 Jul 2012 11:23:31 +0200
Dirkjan Ochtman <djc@gentoo.org> wrote:

> On Mon, Jul 30, 2012 at 11:16 AM, Michał Górny <mgorny@gentoo.org>
> wrote:
> > You're saying 'we should explore the option not to upgrade packages
> > without user explicitly saying "please upgrade this package"'.
> 
> Yes, or until the package maintainer removes the annotation again.
> 
> >> > Or maybe we should explore the option of fixing python.eclass to
> >> > not depend on random python versions implicitly?
> >>
> >> I don't know that it does, but I hope you can enlighten me!
> >
> > It does depend on python versions based on $USE_PYTHON. And
> > USE_PYTHON defaults to 2+3 if installed. If it pulls in Python 3,
> > it will pull in all the time unless you set USE_PYTHON manually and
> > remerge all the packages manually.
> 
> It seems to me that we could fix USE_PYTHON to always depend only on 2
> unless it's explicitly set by the user, but it seems to me that
> Portage would, in that case, still pull python3 into the stages.

Portage will pull python3 if and only if anything depends on python:3.*
or anything depends on python without a SLOT (or either is in @world).
If you want it not there, you have to make sure the deps explicitly
state it.

-- 
Best regards,
Michał Górny