install python 2.7 on ubu code example
Example 1: linux ubuntu install python 3.7
sudo apt-get install python3.7
Example 2: how to install python 3 on ubuntu 20.04
sudo apt install build-essential libssl-dev libffi-dev python3-dev
sudo apt-get install python3.7
sudo apt install build-essential libssl-dev libffi-dev python3-dev