install python 3 in ubuntu site: python code example
Example 1: ubuntu install python
# first do:
sudo apt-get update
# after do:
sudo apt-get install python3.6
# then it should be installed
Example 2: how to install python3 in ubuntu
sudo apt update
sudo apt install software-properties-common
sudo add-apt-repository ppa:deadsnakes/ppa
sudo apt update
sudo apt install python3.8