bpo-42345: Fix hash implementation of typing.Literal (GH-23383)
Fix hash implementation of `typing.Literal`.
Update docs regarding `typing.Litaral` caching.
Base implementation was done in PR GH-23294.
(cherry picked from commit 1b54077ff6f5c1379e097e9f8e8648da9826d6ec)
Co-authored-by: Yurii Karabas <1998uriyyo@gmail.com>
diff --git a/Lib/test/test_typing.py b/Lib/test/test_typing.py
index 9d82eec..13cf20e 100644
--- a/Lib/test/test_typing.py
+++ b/Lib/test/test_typing.py
@@ -573,6 +573,11 @@
self.assertEqual(Literal[1, 2], Literal[2, 1])
self.assertEqual(Literal[1, 2, 3], Literal[1, 2, 3, 3])
+ def test_hash(self):
+ self.assertEqual(hash(Literal[1]), hash(Literal[1]))
+ self.assertEqual(hash(Literal[1, 2]), hash(Literal[2, 1]))
+ self.assertEqual(hash(Literal[1, 2, 3]), hash(Literal[1, 2, 3, 3]))
+
def test_args(self):
self.assertEqual(Literal[1, 2, 3].__args__, (1, 2, 3))
self.assertEqual(Literal[1, 2, 3, 3].__args__, (1, 2, 3))
diff --git a/Lib/typing.py b/Lib/typing.py
index 14952ec..f5316ab 100644
--- a/Lib/typing.py
+++ b/Lib/typing.py
@@ -932,7 +932,7 @@
return set(_value_and_type_iter(self.__args__)) == set(_value_and_type_iter(other.__args__))
def __hash__(self):
- return hash(tuple(_value_and_type_iter(self.__args__)))
+ return hash(frozenset(_value_and_type_iter(self.__args__)))
class Generic: