The source code of the production version is not executable in the form you will see. If want to execute it, copy and paste the contents into a non-formatted text file (not Word) and give it a new file name with a ".py" suffix.
If your system doesn't download programs due to safety concerns, the files can be downloaded from DropBox with this URL: https://www.dropbox.com/sh/86riv3tfs5b7p0v/AABBv5J7f3AvSrITiQ7wHudia?dl=0. You will be presented with a folder containing the files. They can be downloaded with Dropbox facilities.