@lnxw48a1
Note: The current ironpython is still based on Python 2.7 family, the 3.x Python version is still in development and the git notes say:

>IronPython3 is NOT ready for use yet. There is still much that needs to be done to support Python 3.x. We are working on it, albeit slowly.
https://github.com/IronLanguages/ironpython3

Also:
PEP 373- Python 2.7 Release Schedule Python.org
https://www.python.org/dev/peps/pep-0373/#release-schedule

>Being the last of the 2.x series, 2.7 received bugfix support until 2020. Support officially stopped January 1 2020, and 2.7.18 code freeze occurred on January 1 2020, but the final release occurred after that date.