As a counterpoint to 2 versus 3:
http://python-notes.curiousefficiency.org/en/latest/python3/questions_and_answers.html
by Nick Coughlan, one of Python's major core developers.
A couple of points related to the other threads.
1. There were real social and technical reasons for the non-2.8 pep (404).
2. Python 3 is a work in progress with respect to the new text model. In
particular wire protocol programming is a known problem area and will
get attention. But it is only a small part of the total Python universe.
--
Terry Jan Reedy
--
https://mail.python.org/mailman/listinfo/python-list