Built in spite of pyenv and inspired by rye, encant does one thing and one thing only: downloads standalone python builds. Builds come from indygreg's repo.
install encant
pipx install encant
add a python version (or two)
$ encant add 3.10
major.minor only version detected, pulling latest: 3.10.13
Successfully added 3.10.13 to ~/.snakes/3.10.13
That's it! You can now use python however you need to, e.g.:
~/.snakes/3.10.13/bin/python3 -m venv .venv