[Enhancement] Installed Python version should be configurable

[sjedlick]

Description

DMC 3.0.1 includes Python3 (the latest version). I want to specify a Python version other than that (for example python3.9)
Configuring build.yaml with

packages
- python39

doesn't install Python 3.9 in DMC, since in template.d/01_base an installation of python3 is specified (i assume always the latest version).

Additional information

No response

[rndmh3ro]

doesn't install Python 3.9 in DMC, since in template.d/01_base an installation of python3 is specified (i assume always the latest version).

That's not the reason. The reason is that there's no package for Python 3.9 in the default Ubuntu 22.04 repositories.

To add Python 3.9, you need to add a PPA (https://launchpad.net/~deadsnakes/+archive/ubuntu/ppa) to ubuntu and then install it. This is currently not supported by the DMC.

BTW touching the default python installation of Ubuntu is not recommended.

[michaelamattes]

Why you have the need to install a different version from default ? Is it not rather a configuration problem of your tools used. e.g. ansible hardcoded version.

interpreter_python = /usr/bin/python3.9