gh-141510: Document ParameterizedMIMEHeader.params change

vstinner · vstinner · commit 795dbdd75b0c · 2026-02-19T16:26:39.000+01:00
diff --git a/Doc/library/email.headerregistry.rst b/Doc/library/email.headerregistry.rst
@@ -269,6 +269,10 @@ variant, :attr:`~.BaseHeader.max_count` is set to 1.
 
        A dictionary mapping parameter names to parameter values.
 
+       .. versionchanged:: next
+          It is now a :class:`frozendict` instead of a
+          :class:`types.MappingProxyType`.
+
 
 .. class:: ContentTypeHeader
 
diff --git a/Misc/NEWS.d/next/Library/2026-02-19-16-26-08.gh-issue-141510.4Qxy8_.rst b/Misc/NEWS.d/next/Library/2026-02-19-16-26-08.gh-issue-141510.4Qxy8_.rst
@@ -0,0 +1,3 @@
+``ParameterizedMIMEHeader.params`` of :mod:`email.headerregistry` is now a
+:class:`frozendict` instead of a :class:`types.MappingProxyType`. Patch by
+Victor Stinner.

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,3 @@`
	`1`	+``ParameterizedMIMEHeader.params`` of :mod:`email.headerregistry` is now a
	`2`	+:class:`frozendict` instead of a :class:`types.MappingProxyType`. Patch by
	`3`	`+Victor Stinner.`