From: sobolevn <mail@sobolevn.me>
Date: Sat, 9 May 2026 07:55:09 +0000 (+0300)
Subject: gh-149083: Convert `_initial_missing` for pure py `reduce` to `sentinel` (#149536)
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=bc8cf07d8dbb4341955dc85d9b2bf273ec5852c7;p=thirdparty%2FPython%2Fcpython.git

gh-149083: Convert `_initial_missing` for pure py `reduce` to `sentinel` (#149536)
---

diff --git a/Lib/functools.py b/Lib/functools.py
index 73274b94ef37..409b2c50478c 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):
     """