Install Python3.8 on Jetson Nano (run with sudo)

install.sh

#!/bin/bash

apt-get install -y python3.8 python3.8-dev

wget https://files.pythonhosted.org/packages/b7/2d/ad02de84a4c9fd3b1958dc9fb72764de1aa2605a9d7e943837be6ad82337/pip-21.0.1.tar.gz
tar -xzvf pip-21.0.1.tar.gz
cd pip-21.0.1
python3.8 setup.py install

curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py
python3.8 get-pip.py

update-alternatives --install /usr/bin/python python /usr/bin/python3.6 1
update-alternatives --install /usr/bin/python python /usr/bin/python3.8 2
update-alternatives  --set python /usr/bin/python3.8

python -V
which python