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gh-150403: Document frozendict in language reference Mappings section #150404

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gh-150403: Document `frozendict` in language reference Mappings section
oedokumaci May 25, 2026
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Merge remote-tracking branch 'upstream/main' into docs/datamodel-froz…
oedokumaci May 25, 2026
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Drop redundant 'currently' per review
oedokumaci May 25, 2026
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16 changes: 15 additions & 1 deletion Doc/reference/datamodel.rst
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Expand Up @@ -496,7 +496,7 @@ subscript notation ``a[k]`` selects the item indexed by ``k`` from the mapping
:keyword:`del` statements. The built-in function :func:`len` returns the number
of items in a mapping.

There is currently a single intrinsic mapping type:
There are two intrinsic mapping types:


Dictionaries
Expand Down Expand Up @@ -535,6 +535,20 @@ module.
an implementation detail at that time rather than a language guarantee.


Frozen dictionaries
^^^^^^^^^^^^^^^^^^^

.. index:: pair: object; frozendict

These represent an immutable dictionary. They are created by the built-in
:func:`frozendict` constructor. A frozendict is :term:`hashable` if all of
its keys and values are hashable, in which case it can be used as an element
of a set, or as a key in another mapping. :class:`!frozendict` is not a
subclass of :class:`dict`; it inherits directly from :class:`object`.

.. versionadded:: 3.15


Callable types
--------------

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