From: Jelle Zijlstra <jelle.zijlstra@gmail.com>
Date: Sat, 6 Jun 2026 12:47:33 +0000 (-0700)
Subject: gh-149083: Use sentinel for urllib.parse._UNSPECIFIED (#149612)
X-Git-Url: http://git.ipfire.org/gitweb/index.cgi?a=commitdiff_plain;h=884ac3e3ec02347301939ff1f124972d4973f015;p=thirdparty%2FPython%2Fcpython.git

gh-149083: Use sentinel for urllib.parse._UNSPECIFIED (#149612)

This was added in 3.15; let's use a real sentinel instead of an ad-hoc list object.
---

diff --git a/Lib/urllib/parse.py b/Lib/urllib/parse.py
index d64f678d235b..82b95adbdc28 100644
--- a/Lib/urllib/parse.py
+++ b/Lib/urllib/parse.py
@@ -277,7 +277,7 @@ class _NetlocResultMixinBytes(_NetlocResultMixinBase, _ResultMixinBytes):
         return hostname, port
 
 
-_UNSPECIFIED = ['not specified']
+_UNSPECIFIED = sentinel("_UNSPECIFIED", repr="<not specified>")
 _MISSING_AS_NONE_DEFAULT = False
 
 class _ResultBase: