Macintosh Question

[Bryce C. Mason]

I developed a script in windows which opens a file, does "stuff" to it, and
writes a few files back to the disk.

How do I do the "drag and drop" Macintosh version?  I want the user to have
my python script on his desktop and all he has to do is drag the file over
the script, let go, and out pop the files the script generates right on his
desktop.

Any ideas?

Bryce