Dicts now retain order now (in other words all dicts are ordered dicts). I support this, but I also guarantee this is going to bite me in the ass at least once sharing notebooks with someone on an older version of python as I expect to use this liberally. Ah well.
A hefty list if improvements to asyncio. When I tried working with asyncio in Python 3.4 it seemed half-baked and unpythonic. I look forward to trying out the more mature implementation.
Python 3.7 is a great release. Finally is faster than 2.7 for almost all of our use cases.
Something I've been wondering for years: I understand the rift between 2.x and 3.x.. But what is the rationale for maintaining multiple 3.x branches? And how do I choose the right branch for a fresh project? From experience, it seems like it doesn't really matter.