PEP 603 adds a frozenmap type to collections, implemented as HAMT. For a read-only *dict*, I proposed PEP 416 "Add a frozendict builtin type" in 2012. It was rejected. https://peps.python.org/pep-0416/
The outcome of this PEP was the addition of the types.MappingProxy type (previously, it already existed but it was somehow hidden: type(int.__dict__)). Victor _______________________________________________ Python-Dev mailing list -- [email protected] To unsubscribe send an email to [email protected] https://mail.python.org/mailman3/lists/python-dev.python.org/ Message archived at https://mail.python.org/archives/list/[email protected]/message/IQMBELHLSWSEYQI7BEPTJTYP47BWTBUV/ Code of Conduct: http://python.org/psf/codeofconduct/