What version of Python should you use? At the time of writing, the newest version of Python is Python 3.9.1. This provides a number of bug fixes over previous versions and some security updates.

Core Python developers release the next major version of the world's most popular programming language.

Major Python update makes break with past Python 3.0 is a major change from the Python 2 series, and the first release that is intentionally backwards-incompatible.