obbyPY
In order to run the scripts of the apps which are available at this site, a PY Script Runner is supplied, and you don't need to download it here. It is a little standalone app which you can copy to any location and execute directly by simply double-clicking on it.
However, if you wish to try using it to run your own Python scripts, and you are not currently interested in downloading the apps available, just click on the download icon on the left to obtain it.
It is supplied in the form of a ZIP file.
Right click on it, and choose "Extract here" from the popup.
The app will then appear in the same folder.
You can now copy it to a folder where you have your own scripts to run.
(Your scripts all need to use the standard suffix ".py" in order to be recognized.)
Note that the name of the Runner begins with a ZERO. This is just to ensure that it appears among the first files in the folder, for convenience.
You can change its name if you wish.
It will list all the Python scripts it finds in your folder.
Just click on the one you wish to execute.
The little "HELP" required appears on the right hand side of the app itself. That's all you need, I think.
It is worth repeating here, though, that if you close the Runner, it will kill off ALL currently running Python scripts, not just the one that you have chosen with it. That's a small detail that you might need to watch.