The Python installation detection in getPysysInterpreter() is looking for ersion in the output from the -V option to the Python interpreter. However, all the Python interpreters I have available produce output of the form Python x.y.z, e.g.

scott@orac:~/Projects$ python3 -V
Python 3.7.4
scott@orac:~/Projects$ python2 -V
Python 2.7.17

This is on WSL2 Ubuntu 18.04 and Raspberry Pi OS December 2020, using Pythons from the standard repos, so I don't think there is anything weird going on in my environment. I've opened PR #21 to (maybe) fix this and a related issue I found while trying to debug the first one.