Tecadmin published a tutorial about creating a Python Virtual Environment on Ubuntu 18.04 and 16.04.

How to Create Python Virtual Environment on Ubuntu 18.04 & 16.04

The Virtualenv is used to create an isolated environment for Python application. It provides separate environment to application that system environment. This tutorial will help you to create a Python virtual environment on Ubuntu 19.10, 18.04 and 16.04 LTS systems.

Before We Start
This tutorial has been tested on Ubuntu 18.04 Linux hosted by DigitalOcean. Also, I have already installed Python 3.8 on this system.

How to Create Python Virtual Environment on Ubuntu 18.04 & 16.04