Hello,

pykde4 is the last package in the tree using python-exec:0, and a new
version supporting :2 is being stabilized right now. For this reason, I
think we should start preparing ourselves to remove python-exec:0. I'm
thinking of 30-day p.mask followed by eclass update.

I'm attaching a patch for review. The patch removes bi-python-exec
support in favor of supporting only :2. Specifically:

1. ebuilds forcing python-exec:0 via the internal variable call 'die'
now,

2. PYTHON_DEPS is updated to require >=python-exec-2:=. This way we
still provide support for potential python-exec-3 while requiring at
least 2 ;).

3. all conditionals are inlined to support only :2, also some code has
been simplified.

Please review and possibly test. I haven't tested it yet but
there's still some time before the patch can be committed ;).

-- 
Best regards,
Michał Górny