The software version used for this workshop is Python 3.6.4. (latest available as of workshop period). Python 3 is easy to install like any other computer application - games, microsoft office, etc. It can be downloaded for free from here.
A step-by-step instructional video (1) for installation of python 3 is also made available for your convenience. Additionally, it also contains instructions for installing an IDE Komodo Edit 11 (optional). An IDE is a text editing environment (like a word file) for your python code, with some additional functionalities.
(1) - Adapted from Lynda