[Python-Dev] PEP 558, the simplest thing I could come up with

Hi Nick, Our discussion on PEP 558 got me thinking "What is the simplest thing that would work?". This is what I came up (in the form of a draft PEP): https://github.com/markshannon/peps/blob/pep-locals/pep-06xx.rst It doesn't have O(1) len(f_locals), and it does break `PyEval_GetLocals()` but I think the that is a small price to pay for simplicity and consistency. What do you think? Cheers, Mark.