From 06e747b847f83272abe7b9455b1330d4517b046f Mon Sep 17 00:00:00 2001
From: dkane01 <dk1384@nyu.edu>
Date: Fri, 19 Sep 2025 02:41:56 +0000
Subject: [PATCH] ENH: set __module__ on IndexSlice

---
 pandas/core/indexing.py      | 6 +++++-
 pandas/tests/api/test_api.py | 1 +
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/pandas/core/indexing.py b/pandas/core/indexing.py
index 1ea06e5473805..98eb6034b6289 100644
--- a/pandas/core/indexing.py
+++ b/pandas/core/indexing.py
@@ -28,7 +28,10 @@
     LossySetitemError,
 )
 from pandas.errors.cow import _chained_assignment_msg
-from pandas.util._decorators import doc
+from pandas.util._decorators import (
+    doc,
+    set_module,
+)
 
 from pandas.core.dtypes.cast import (
     can_hold_element,
@@ -101,6 +104,7 @@
 
 
 # the public IndexSlicerMaker
+@set_module("pandas")
 class _IndexSlice:
     """
     Create an object to more easily perform multi-index slicing.
diff --git a/pandas/tests/api/test_api.py b/pandas/tests/api/test_api.py
index 053c268dd8503..e6882144aa629 100644
--- a/pandas/tests/api/test_api.py
+++ b/pandas/tests/api/test_api.py
@@ -457,5 +457,6 @@ def test_set_module():
     assert pd.to_timedelta.__module__ == "pandas"
     assert pd.to_numeric.__module__ == "pandas"
     assert pd.NamedAgg.__module__ == "pandas"
+    assert pd.IndexSlice.__module__ == "pandas"
     assert api.typing.SeriesGroupBy.__module__ == "pandas.api.typing"
     assert api.typing.DataFrameGroupBy.__module__ == "pandas.api.typing"