gh-141510: Document frozendict support in json (gh-155929)

https://github.com/python/cpython/commit/c3df37cb62e5864f2c7bf654de131d701820f999
commit: c3df37cb62e5864f2c7bf654de131d701820f999
branch: main
author: Sanghun Lee <[email protected]>
committer: corona10 <[email protected]>
date: 2026-08-17T14:54:06+09:00
summary:

gh-141510: Document frozendict support in json (gh-155929)

files:
M Doc/library/json.rst

diff --git a/Doc/library/json.rst b/Doc/library/json.rst
index 383ccad9df041b..5e8c452a5ab9a1 100644
--- a/Doc/library/json.rst
+++ b/Doc/library/json.rst
@@ -486,7 +486,7 @@ Encoders and Decoders
    +----------------------------------------+---------------+
    | Python                                 | JSON          |
    +========================================+===============+
-   | dict                                   | object        |
+   | dict, frozendict                       | object        |
    +----------------------------------------+---------------+
    | list, tuple                            | array         |
    +----------------------------------------+---------------+
@@ -504,6 +504,9 @@ Encoders and Decoders
    .. versionchanged:: 3.4
       Added support for int- and float-derived Enum classes.
 
+   .. versionchanged:: 3.15
+      Added support for :class:`frozendict`.
+
    To extend this to recognize other objects, subclass and implement a
    :meth:`~JSONEncoder.default` method with another method that returns a serializable object
    for ``o`` if possible, otherwise it should call the superclass implementation

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