[Python-Dev] PEP 558: Defined semantics for locals() (original) (raw)

Nick Coghlan ncoghlan at gmail.com
Thu May 23 09:36:22 EDT 2019

On Wed, 22 May 2019 at 00:51, Nick Coghlan <ncoghlan at gmail.com> wrote:

P.S. I'm away this weekend, so I expect the reference implementation to be done late next week, and I'd be submitting the PEP to Nathaniel for formal pronouncement at that point. However, I'm posting this thread now so that there's more time for discussion prior to the 3.8b1 deadline.

I found some time the other day to finish up the core of the reference implementation and resolve some bugs in the new test cases, so the essential changes can now be seen in https://github.com/python/cpython/pull/3640/files

There are still some code level TODO items to cover off a few minor points in the PEP, as well as to make the fast locals proxy a better behaved mutable mapping. The proposed documentation changes also still need to be brought over from the PEP, and at least a quick scan done through the code comments and the rest of the documentation for now outdated references to the legacy trace function namespace handling.

However, I think the PR does show that the proposed technique can be implemented without too much additional code complexity, and will hopefully be adaptable for all implementations that emulate the frame API at all.

Cheers, Nick.

-- Nick Coghlan | ncoghlan at gmail.com | Brisbane, Australia

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