From: Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com>
Date: Sat, 9 May 2026 08:27:29 +0000 (+0200)
Subject: [3.15] gh-149083: Convert `_initial_missing` for pure py `reduce` to `sentinel` ... 
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=915b6c1572285f2bd469be177fe523eca52951f1;p=thirdparty%2FPython%2Fcpython.git

[3.15] gh-149083: Convert `_initial_missing` for pure py `reduce` to `sentinel` (GH-149536) (#149592)

gh-149083: Convert `_initial_missing` for pure py `reduce` to `sentinel` (GH-149536)
(cherry picked from commit bc8cf07d8dbb4341955dc85d9b2bf273ec5852c7)

Co-authored-by: sobolevn <mail@sobolevn.me>
---

diff --git a/Lib/functools.py b/Lib/functools.py
index cd374631f167..e03a77f204b5 100644
--- a/Lib/functools.py
+++ b/Lib/functools.py
@@ -232,7 +232,7 @@ except ImportError:
 ### reduce() sequence to a single item
 ################################################################################
 
-_initial_missing = object()
+_initial_missing = sentinel('_initial_missing')
 
 def reduce(function, sequence, initial=_initial_missing):
     """