Python versions (Score: 2, Informative)
by mth@pipedot.org in GNU Mailman 3.0 is out ! on 2015-04-29 15:15 (#8286)
That's not a 'maybe': Python 2.x and 3.x are incompatible, since Python 3 made some backwards incompatible changes to clean up the language. While it is easy enough to run each process in a different Python version, it would simplify things if they just updated all subprojects to Python 3.x. There is a conversion tool for it (2to3) that works pretty well in my experience.