IMO the many versions and dependencies in Python make it highly fragmented and fragile. Using Python Virtual Environments, the programmer can rapidly experiment with different versions and dependencies in a VE, without disrupting the computer operating system.
Create a project directory and move into it
mkdir piper; cd piper
Check Python version
python3 -V
Python 3.8.10
Install Python VENV
sudo apt install python3.8-venv
Create virtual environment
python3 -m venv .venv
Activate the virtual environment
source .venv/bin/activate
To deactivate the virtual environment just type deactivate
deactivate
Different version of Python for your Python Virtual Environment
sudo add-apt-repository ppa:deadsnakes/ppa
sudo apt-get update
sudo apt-get install python3.9 python3.9-venv python3.9-dev
Create a PVE for the new version
python3.9 -m venv new_venv
Activate the new PVE
source new_venv/bin/activate