First: technical gibberish, while I guess it can be considered a language, is by no means secret - it's like using "it's" instead of "it is". You start using it because it's so damn much more convenient, you keep using it because of habit.
Just ask and we'll explain as best we can, because we know we can't make everything understandable on the first try (although be warned we can't always cut the technical part out of technical subjects, for obvious reasons).
The Python File Node exports a Python File Mod. Simple, yea ?
Now let's keep this civil, shall we ?
EDIT: and just to make sure we don't mutually waste everyone's time:
Download the Python sources
for MOUL, and use those when you click on the big "select" button above. Pick one of those
fancy scripts, and you'll notice the node just gained extra input parameters. You'll obviously have to link those to various other Python Attribute nodes. If the purpose of one of those is unclear, ask us more precision about them.