$ sudo apt-get install software-properties-common
$ sudo add-apt-repository ppa:deadsnakes/ppa
$ sudo apt-get update
$ sudo apt-get install python3.8
sudo apt update
sudo apt install python3
python [-bBdEiOQsRStuUvVWxX3?] [-c command | -m module-name | script | - ] [args]
run ./configure script
make
make install