From 4c4c58b941dbf62f0e1aee81fcc63cc31487522b Mon Sep 17 00:00:00 2001
From: Jelle Zijlstra <jelle.zijlstra@gmail.com>
Date: Sat, 6 Jun 2026 05:47:33 -0700
Subject: [PATCH] gh-149083: Use sentinel for urllib.parse._UNSPECIFIED
 (GH-149612)

This was added in 3.15; let's use a real sentinel instead of an ad-hoc list object.
(cherry picked from commit 884ac3e3ec02347301939ff1f124972d4973f015)

Co-authored-by: Jelle Zijlstra <jelle.zijlstra@gmail.com>
---
 Lib/urllib/parse.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Lib/urllib/parse.py b/Lib/urllib/parse.py
index d64f678d235b6f..82b95adbdc283e 100644
--- a/Lib/urllib/parse.py
+++ b/Lib/urllib/parse.py
@@ -277,7 +277,7 @@ def _hostinfo(self):
         return hostname, port
 
 
-_UNSPECIFIED = ['not specified']
+_UNSPECIFIED = sentinel("_UNSPECIFIED", repr="<not specified>")
 _MISSING_AS_NONE_DEFAULT = False
 
 class _ResultBase: