From 6d96de82888608beb0538318e9ea664dd56ebba2 Mon Sep 17 00:00:00 2001
From: Huanyi Xie <74809554+xiehuanyi@users.noreply.github.com>
Date: Mon, 12 Oct 2026 11:27:00 +0300
Subject: [PATCH 1/2] Accept integer-like defaults in operator.length_hint

---
 stdlib/@tests/test_cases/check_operator.py | 13 +++++++++++++
 stdlib/_operator.pyi                       |  2 +-
 2 files changed, 14 insertions(+), 1 deletion(-)
 create mode 100644 stdlib/@tests/test_cases/check_operator.py

diff --git a/stdlib/@tests/test_cases/check_operator.py b/stdlib/@tests/test_cases/check_operator.py
new file mode 100644
index 000000000000..3ef774215b85
--- /dev/null
+++ b/stdlib/@tests/test_cases/check_operator.py
@@ -0,0 +1,13 @@
+import _operator
+import operator
+from typing_extensions import assert_type
+
+
+class Index:
+    def __index__(self) -> int:
+        return 3
+
+
+assert_type(operator.length_hint(object(), Index()), int)
+assert_type(_operator.length_hint(object(), Index()), int)
+operator.length_hint(object(), 1.5)  # type: ignore[arg-type]
diff --git a/stdlib/_operator.pyi b/stdlib/_operator.pyi
index 565bb41697f1..066a0a167c5b 100644
--- a/stdlib/_operator.pyi
+++ b/stdlib/_operator.pyi
@@ -132,7 +132,7 @@ def setitem(a: MutableSequence[_T], b: slice[int | None], c: Sequence[_T], /) ->
 @overload
 def setitem(a: MutableMapping[_K, _V], b: _K, c: _V, /) -> None: ...
 
-def length_hint(obj: object, default: int = 0, /) -> int: ...
+def length_hint(obj: object, default: SupportsIndex = 0, /) -> int: ...
 def iadd(a, b, /): ...
 def iand(a, b, /): ...
 def iconcat(a, b, /): ...

From b43d54ba0ce9f82ebb786342fbab2a5d04dd33e9 Mon Sep 17 00:00:00 2001
From: Huanyi Xie <74809554+xiehuanyi@users.noreply.github.com>
Date: Mon, 12 Oct 2026 17:31:58 +0300
Subject: [PATCH 2/2] Remove the in-PR length_hint regression test

---
 stdlib/@tests/test_cases/check_operator.py | 13 -------------
 1 file changed, 13 deletions(-)
 delete mode 100644 stdlib/@tests/test_cases/check_operator.py

diff --git a/stdlib/@tests/test_cases/check_operator.py b/stdlib/@tests/test_cases/check_operator.py
deleted file mode 100644
index 3ef774215b85..000000000000
--- a/stdlib/@tests/test_cases/check_operator.py
+++ /dev/null
@@ -1,13 +0,0 @@
-import _operator
-import operator
-from typing_extensions import assert_type
-
-
-class Index:
-    def __index__(self) -> int:
-        return 3
-
-
-assert_type(operator.length_hint(object(), Index()), int)
-assert_type(_operator.length_hint(object(), Index()), int)
-operator.length_hint(object(), 1.5)  # type: ignore[arg-type]