How to create a Python virtual environment.

On Windows

$ pip install venv
$ python3 -m venv ~/python-test

On Ubuntu

$ sudo apt install python3.8-venv
$ python3 -m venv ~/python-test

On Mac OS

$ brew install virtualenv
$ virtualenv python-test

Activate

$ cd ~/python-test
$ source bin/activate

Deactivate

$ deactivate