Dear Kirby, Many times on this list and elsewhere ( http://mybizmo.blogspot.com/2006/08/python-pedagogy.html and http://controlroom.blogspot.com/2006/09/lunch-on-hawthorne.html) you have written about Python's special methods as "__ribs__". While you have given many examples ... it is difficult to find a single definitive link that others could be directed to, to learn about this approach (with links to other examples...). I think it would be very useful to all of us if you could come up with a "reasonably complete" single post (either on this list or on some other website) about __ribs__, starting from the beginning simple image, meandering in your own unique way to perhaps conclude with an example showing operator overloading (with fractions?) using Python's special methods. André