Should I use Python 2 or Python 3 for my development activity?
Python 3 is strongly recommended for any new development. As of January 2020, Python 2 has reached End Of Life status, meaning it will receive no further updates or bugfixes, including for security issues. Many frameworks and other add on projects are following a similar policy. As such, we can only recommend learning and teaching Python 3.
For historical information that may be useful in porting or maintaining remaining Python 2 systems, please see previous page revisions.