From 3efd377fc16df7063cba7915cea137c514606956 Mon Sep 17 00:00:00 2001
From: Jelle Zijlstra <jelle.zijlstra@gmail.com>
Date: Mon, 12 May 2025 08:22:55 -0700
Subject: [PATCH] gh-133925: Make typing._UnionGenericAlias hashable
 (GH-133929) (cherry picked from commit
 8d478c79539ed0ec7071766b7a0afe62fb11f7d4)

Co-authored-by: Jelle Zijlstra <jelle.zijlstra@gmail.com>
---
 Lib/test/test_typing.py                                        | 3 +++
 Lib/typing.py                                                  | 3 +++
 .../Library/2025-05-12-06-52-10.gh-issue-133925.elInBY.rst     | 1 +
 3 files changed, 7 insertions(+)
 create mode 100644 Misc/NEWS.d/next/Library/2025-05-12-06-52-10.gh-issue-133925.elInBY.rst

diff --git a/Lib/test/test_typing.py b/Lib/test/test_typing.py
index 8c55ba4623e719..a4fab1d5e14805 100644
--- a/Lib/test/test_typing.py
+++ b/Lib/test/test_typing.py
@@ -10731,6 +10731,9 @@ def test_eq(self):
         with self.assertWarns(DeprecationWarning):
             self.assertNotEqual(int, typing._UnionGenericAlias)
 
+    def test_hashable(self):
+        self.assertEqual(hash(typing._UnionGenericAlias), hash(Union))
+
 
 def load_tests(loader, tests, pattern):
     import doctest
diff --git a/Lib/typing.py b/Lib/typing.py
index 2baf655256d1eb..0695a825283c7a 100644
--- a/Lib/typing.py
+++ b/Lib/typing.py
@@ -1649,6 +1649,9 @@ def __eq__(self, other):
             return True
         return NotImplemented
 
+    def __hash__(self):
+        return hash(Union)
+
 
 class _UnionGenericAlias(metaclass=_UnionGenericAliasMeta):
     """Compatibility hack.
diff --git a/Misc/NEWS.d/next/Library/2025-05-12-06-52-10.gh-issue-133925.elInBY.rst b/Misc/NEWS.d/next/Library/2025-05-12-06-52-10.gh-issue-133925.elInBY.rst
new file mode 100644
index 00000000000000..328e28abc3b42b
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2025-05-12-06-52-10.gh-issue-133925.elInBY.rst
@@ -0,0 +1 @@
+Make the private class ``typing._UnionGenericAlias`` hashable.