First of all, Python is approved under an OSI-approved license, which makes it absolutely free to download. You can simply go to the Python’s site and look for the latest version there. Besides the latest, there are certain past versions that are still supported and you will also see the latest updates available.
Simply find the one that you need and click “download.” Follow the instructions as they appear and approve the necessary actions. Once the process is done, you will be able to use Python on your computer.