Keeping up with Python: what makes upgrades hard, and what can we do about it

cPython upgrades can be very challenging. Changes in python version usually mean changes all over the place and managing that can be taxing. Like first party code using deprecated api or Third-party code changing API required to change python versions. Lets go over some bad code examples and ways to improve the experience for everyone. So that maybe in the future upgrades are not so hard.