From: Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com>
Date: Fri, 27 Sep 2024 21:23:16 +0000 (+0200)
Subject: [3.13] gh-124520: What's New entry for ctypes metaclass __new__/__init__ change ... 
X-Git-Tag: v3.13.0rc3~52
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=ec4d7b5d22060c8a485876306294196a0e9aeea6;p=thirdparty%2FPython%2Fcpython.git

[3.13] gh-124520: What's New entry for ctypes metaclass __new__/__init__ change (GH-124546) (#124708)

gh-124520: What's New entry for ctypes metaclass __new__/__init__ change (GH-124546)
(cherry picked from commit 3387f76b8f0b9f5ef89f9526c583bcc3dc36f486)

Co-authored-by: Petr Viktorin <encukou@gmail.com>
---

diff --git a/Doc/whatsnew/3.13.rst b/Doc/whatsnew/3.13.rst
index 45817799b542..52fe749697cf 100644
--- a/Doc/whatsnew/3.13.rst
+++ b/Doc/whatsnew/3.13.rst
@@ -824,6 +824,24 @@ copy
   (Contributed by Serhiy Storchaka in :gh:`108751`.)
 
 
+ctypes
+------
+
+* As a consequence of necessary internal refactoring, initialization of
+  internal metaclasses now happens in ``__init__`` rather
+  than in ``__new__``. This affects projects that subclass these internal
+  metaclasses to provide custom initialization.
+  Generally:
+
+  - Custom logic that was done in ``__new__`` after calling ``super().__new__``
+    should be moved to ``__init__``.
+  - To create a class, call the metaclass, not only the metaclass's
+    ``__new__`` method.
+
+  See :gh:`124520` for discussion and links to changes in some affected
+  projects.
+
+
 dbm
 ---