[Python-ideas] Expose a child factory using MappingProxyType in builtins

[Ivan Levkivskyi]

On 28 February 2017 at 23:19, Victor Stinner <victor.stinner at gmail.com>
wrote:

> 2017-02-28 13:17 GMT+01:00 Michel Desmoulin <desmoulinmichel at gmail.com>:
> > We have the immutable frozenset for sets and and tuples for lists.
> >
> > But we also have something to manipulate dict as immutable
> datastructures:
>
> ... Sorry, I don't understand your proposition.
>

My interpretation of the idea is to reconsider
https://www.python.org/dev/peps/pep-0416/
but put frozendict in collections, not in builtins.

MappingProxyType could be a possible implementation
(plus copying in constructor and hashing, as proposed above by Matt),
but not necessarily.

--
Ivan
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