From: Jelle Zijlstra <jelle.zijlstra@gmail.com>
Date: Mon, 12 May 2025 15:22:55 +0000 (-0700)
Subject: gh-133925: Make typing._UnionGenericAlias hashable (#133929)
X-Git-Tag: v3.15.0a1~1750
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=8d478c79539ed0ec7071766b7a0afe62fb11f7d4;p=thirdparty%2FPython%2Fcpython.git

gh-133925: Make typing._UnionGenericAlias hashable (#133929)
---

diff --git a/Lib/test/test_typing.py b/Lib/test/test_typing.py
index bc03e6bf2d79..6ef633e4545a 100644
--- a/Lib/test/test_typing.py
+++ b/Lib/test/test_typing.py
@@ -10668,6 +10668,9 @@ class UnionGenericAliasTests(BaseTestCase):
         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 44f39e9672f4..3d64480e1431 100644
--- a/Lib/typing.py
+++ b/Lib/typing.py
@@ -1649,6 +1649,9 @@ class _UnionGenericAliasMeta(type):
             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 000000000000..328e28abc3b4
--- /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.