[Python-Dev] Issue 14417: consequences of new dict runtime error

[Victor Stinner]

> No, not really. Anyways, I guess I'll have to further dig down why is
> PEP-416 is really important to Python and why it was likewise rejected,
> supposing I confused the pep 416 and issue 14417 along the way.. :-)

The frozendict builtin type was rejected, but we are going to add
types.MappingProxyType: see issue #14386.
types.MappingProxyType(mydict.copy()) is very close to the frozendict
builtin type.

Victor