I’m one of the guy who needs to know the internals of a machine before using it. I can’t help it but that is my very nature. The following article that I refer to is not for faint heart (meaning beginners to programming or python) and is by far the best i’ve found ever that describes the internals of python(at least 2.x) and i’ve to admit that i never ever used python 3 or found a need for using 3.x.
If you are curious about how python types, object or descriptors or attributes or methods work internally then read this .
My recommendation is to save the pdf version since this guy never wrote a book (which would have been an excellent one for experts or intermediates) and not sure how long his/her site will be up.