Since I've been poking around in this area of CPython lately, here's some triviaassociated with frame objects.

First, one might wonder if code executing at the module level literallyhas a CPython frame struct with f_locals being the same as f_globals , or if the C code just leaves f_locals null and fixesthings up behind the scenes when you look from Python code. Theanswer turns out to be that CPython frame structures always havea real f_locals (Python) dictionary