[gentoo-python] Providing a common replacement for python_export_best & python*_pkg_setup

[Michał Górny]

Hello,

As a result of late doc writing and adding MERGE_TYPE check to
python-any-r1_pkg_setup, I'm thinking about adding a new function.

The function would, depending on the eclass in use:

1. for python-any-r1, be the 'original' version of
python-any-r1_pkg_setup, that is finding and setting up the Python
version without the MERGE_TYPE check,

2. for python-single-r1, be equivalent to python-single-r1_pkg_setup,

3. for python-r1, call python_export_best + python_wrapper_setup.

So in any of the eclasses, the function would result in Python being
set up properly for use in global scope.

The question is: how to name the function? We need a name that would be
easy to remember and not confusing at the same time. Especially, I'd
like to avoid wrongly suggesting that python-r1 needs it -- since it
usually doesn't :).

-- 
Best regards,
Michał Górny