PEP 667: Mark as Final

[hugovk]

• Final implementation has been merged (including tests and docs)
• PEP matches the final implementation
• Any substantial changes since the accepted version approved by the SC/PEP delegate
• Pull request title in appropriate format (PEP 123: Mark Final)
• Status changed to Final (and Python-Version is correct)
• Canonical docs/spec linked with a canonical-doc directive
  (or canonical-pypa-spec for packaging PEPs,
  or canonical-typing-spec for typing PEPs)

Helps #3781.

@markshannon @gaogaotiantian:

• Is this PEP ready to be marked Final?

• Is https://docs.python.org/3.13/library/functions.html#locals the right place to link to as canonical documentation?

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📚 Documentation preview 📚: https://pep-previews--3942.org.readthedocs.build/

[ncoghlan]

#3845 is still open, along with the corresponding SC ticket at python/steering-council#245 so I don't believe it's quite there yet (specifically missing the second point in the checklist).

For the canonical docs, there are a few relevant canonical links:

• Python builtin API: https://docs.python.org/3.13/library/functions.html#locals
• Python frame API: https://docs.python.org/3.13/reference/datamodel.html#frame-objects
• C reflection API: https://docs.python.org/3.13/c-api/reflection.html
• C frame API: https://docs.python.org/3.13/c-api/frame.html

[hugovk]

Thanks, let's move this to draft until it's ready.

[ncoghlan]

#3845 has been approved and merged, so I think this is genuinely Final now.