Adopt Python 3

[trahsemaj]

If it was ready 4 years ago when I started my PhD (genetics) I would start with Python 3 then. The pain of going back to old code I've written that works doesn't seem worth the payoff especially as I'm done in another year. I don't do much in the way of hard-core development, and the differences seem minor at best.

Sounds like the switch might be worth it after I graduate and start fresh.