A fairly advanced question:

I have a certain format string for almost every type of file. I have been "manually" (using pyrenamer, which rocks!) renaming them in bulk. I was wondering if there's a way to automatically (there has to be) set up a script so that certain files will be automatically renamed with a certain format string that uses their date-modified/date-created as part of the format string. I am guess this would involve some kind of cli script? I am not advanced as I'd want to be yet to write such a script but would love to learn.