From a7320135da5829cacd1b4e6c4cb0d675f8acea85 Mon Sep 17 00:00:00 2001
From: oppnc <129483880+oppnc@users.noreply.github.com>
Date: Tue, 26 May 2026 05:11:29 +0800
Subject: [PATCH] Fix TypedDict tuple context for Collection

---
 mypy/types.py                                |  1 +
 test-data/unit/check-typeddict.test          | 17 +++++++++++++++++
 test-data/unit/fixtures/typing-typeddict.pyi |  2 ++
 3 files changed, 20 insertions(+)

diff --git a/mypy/types.py b/mypy/types.py
index 5a05962dc4802..9781861edec18 100644
--- a/mypy/types.py
+++ b/mypy/types.py
@@ -163,6 +163,7 @@
     "builtins.tuple",
     "typing.Iterable",
     "typing.Container",
+    "typing.Collection",
     "typing.Sequence",
     "typing.Reversible",
 )
diff --git a/test-data/unit/check-typeddict.test b/test-data/unit/check-typeddict.test
index 17a1fea22ef04..25f7ea1065434 100644
--- a/test-data/unit/check-typeddict.test
+++ b/test-data/unit/check-typeddict.test
@@ -4601,6 +4601,23 @@ inputs: Sequence[Component] = [{
 [builtins fixtures/dict.pyi]
 [typing fixtures/typing-typeddict.pyi]
 
+[case testTypedDictTupleExpressionWithCollectionContext]
+import collections.abc
+from typing import Collection, TypedDict
+
+class Item(TypedDict):
+    x: int
+
+def take(items: Collection[Item]) -> None: ...
+def take_abc(items: collections.abc.Collection[Item]) -> None: ...
+
+take(({"x": 1}, {"x": 2}))
+take_abc(({"x": 1}, {"x": 2}))
+items: Collection[Item] = ({"x": 1}, {"x": 2})
+abc_items: collections.abc.Collection[Item] = ({"x": 1}, {"x": 2})
+[builtins fixtures/dict.pyi]
+[typing fixtures/typing-typeddict.pyi]
+
 [case testTypedDictAssignableToWiderContext]
 from typing import TypedDict, Union
 
diff --git a/test-data/unit/fixtures/typing-typeddict.pyi b/test-data/unit/fixtures/typing-typeddict.pyi
index 0bc5637b32708..0f1439d21c5ba 100644
--- a/test-data/unit/fixtures/typing-typeddict.pyi
+++ b/test-data/unit/fixtures/typing-typeddict.pyi
@@ -47,6 +47,8 @@ class Iterable(Protocol[T_co]):
 class Iterator(Iterable[T_co], Protocol):
     def __next__(self) -> T_co: pass
 
+class Collection(Iterable[T_co]): pass
+
 class Sequence(Iterable[T_co]):
     def __getitem__(self, n: Any) -> T_co: pass # type: ignore[explicit-any]