Simple way to manage different Python versions

This video demonstrates a simple flow to manage Python versions in Ubuntu.

The commands used in this video:

sudo apt update

install dependencies
sudo apt-get install make build-essential libssl-dev zlib1g-dev \
libbz2-dev libreadline-dev libsqlite3-dev wget curl llvm \
libncursesw5-dev xz-utils tk-dev libxml2-dev libxmlsec1-dev libffi-dev liblzma-dev -y

install pyenv
curl pyenv.run/ | bash

configure .bashrc
(use what the pyenv installation prescribes)

restart your shell
exec $SHELL

install a python version
pyenv install 3.8 (or any version)

start particular python environment
pyenv shell 3.8