https://github.com/python/cpython/commit/8eec7ed714e65d616573b7331780b0aa43c6ed6a
commit: 8eec7ed714e65d616573b7331780b0aa43c6ed6a
branch: main
author: 傅立业（Chris Fu） <[email protected]>
committer: AlexWaygood <[email protected]>
date: 2024-03-29T00:19:20Z
summary:
gh-117110: Fix subclasses of typing.Any with custom constructors (#117111)
files:
A Misc/NEWS.d/next/Library/2024-03-21-07-27-36.gh-issue-117110.9K1InX.rst
M Lib/test/test_typing.py
M Lib/typing.py
diff --git a/Lib/test/test_typing.py b/Lib/test/test_typing.py
index 54c7b976185585..927f74eb69fbc7 100644
--- a/Lib/test/test_typing.py
+++ b/Lib/test/test_typing.py
@@ -140,6 +140,26 @@ class MockSomething(Something, Mock): pass
self.assertIsInstance(ms, Something)
self.assertIsInstance(ms, Mock)
+ def test_subclassing_with_custom_constructor(self):
+ class Sub(Any):
+ def __init__(self, *args, **kwargs): pass
+ # The instantiation must not fail.
+ Sub(0, s="")
+
+ def test_multiple_inheritance_with_custom_constructors(self):
+ class Foo:
+ def __init__(self, x):
+ self.x = x
+
+ class Bar(Any, Foo):
+ def __init__(self, x, y):
+ self.y = y
+ super().__init__(x)
+
+ b = Bar(1, 2)
+ self.assertEqual(b.x, 1)
+ self.assertEqual(b.y, 2)
+
def test_cannot_instantiate(self):
with self.assertRaises(TypeError):
Any()
diff --git a/Lib/typing.py b/Lib/typing.py
index 581d187235dc7e..ef532f6c91539d 100644
--- a/Lib/typing.py
+++ b/Lib/typing.py
@@ -539,7 +539,7 @@ class Any(metaclass=_AnyMeta):
def __new__(cls, *args, **kwargs):
if cls is Any:
raise TypeError("Any cannot be instantiated")
- return super().__new__(cls, *args, **kwargs)
+ return super().__new__(cls)
@_SpecialForm
diff --git
a/Misc/NEWS.d/next/Library/2024-03-21-07-27-36.gh-issue-117110.9K1InX.rst
b/Misc/NEWS.d/next/Library/2024-03-21-07-27-36.gh-issue-117110.9K1InX.rst
new file mode 100644
index 00000000000000..32f8f81c8d052f
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2024-03-21-07-27-36.gh-issue-117110.9K1InX.rst
@@ -0,0 +1 @@
+Fix a bug that prevents subclasses of :class:`typing.Any` to be instantiated
with arguments. Patch by Chris Fu.
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