Blender 2.79b has Python 3.5.3 embedded, so download Python 3.5.3 and install. Python installers should keep all of the 3.x releases separate, so you should be able to install it without disrupting, ...

This script should work regardless of which version of Blender you are using, but you will need to verify which version of Python is currently being used by Blender. You can find that information from ...