You don't need to learn any of those, and they don't break pre-existing code. You can run code written for Python3.2 in 3.10. You can't run code written for Pyt

You don't need to learn any of those, and they don't break pre-existing code. You can run code written for Python3.2 in 3.10. You can't run code written for Python3.10 in Python3.2. That's what backwards compatibility means. It has nothing to do with new features that only affect themselves. Also Python predates SemVer, so it doesn't use major.minor.patch. 3.10 is not considered a minor update.