I meant the C stack, not the Python stack. At the C level all Python objects are allocated on the heap (except for some of the singletons like None which are statically allocated by the interpreter). (The fact that I used the term "heap" indicates that I was talking about the C level, since there is no "heap" at the Python level.)

> Python argument passing is no different from any other language in which everything is an object.

I disagree, since again you have left out the namespace binding step completely.