From: Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com>
Date: Thu, 26 Sep 2024 19:19:57 +0000 (+0200)
Subject: [3.12] Programming FAQ: Mention object.__setattr__ as a technique for delegation... 
X-Git-Tag: v3.12.7~32
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=27890edd5aa1b990b7f458bcc6c86e83fdd1aaac;p=thirdparty%2FPython%2Fcpython.git

[3.12] Programming FAQ: Mention object.__setattr__ as a technique for delegation (GH-124617) (#124625)

Co-authored-by: Jelle Zijlstra <jelle.zijlstra@gmail.com>
---

diff --git a/Doc/faq/programming.rst b/Doc/faq/programming.rst
index 55432ab79d58..7a8670111641 100644
--- a/Doc/faq/programming.rst
+++ b/Doc/faq/programming.rst
@@ -1613,9 +1613,16 @@ method too, and it must do so carefully.  The basic implementation of
            self.__dict__[name] = value
        ...
 
-Most :meth:`!__setattr__` implementations must modify
-:attr:`self.__dict__ <object.__dict__>` to store
-local state for self without causing an infinite recursion.
+Many :meth:`~object.__setattr__` implementations call :meth:`!object.__setattr__` to set
+an attribute on self without causing infinite recursion::
+
+   class X:
+       def __setattr__(self, name, value):
+           # Custom logic here...
+           object.__setattr__(self, name, value)
+
+Alternatively, it is possible to set attributes by inserting
+entries into :attr:`self.__dict__ <object.__dict__>` directly.
 
 
 How do I call a method defined in a base class from a derived class that extends it?