- Open terminal using keyboard ctrl+alt T
- sudo add-apt-repository ppa:jonathonf/python-3.6
- sudo apt-get update
- sudo apt-get install python3.6
- sudo update-alternatives –install /usr/bin/python3 python3 /usr/bin/python3.5 1
- sudo update-alternatives –install /usr/bin/python3 python3 /usr/bin/python3.6 2
- sudo update-alternatives –config python3
- python3 -V then show : Python 3.6.1+