From fe8d090887b356fdd7a6fbfd00578309e1c34ded Mon Sep 17 00:00:00 2001
From: Hagen Wierstorf <hwierstorf@audeering.com>
Date: Tue, 25 Jun 2024 13:05:10 +0200
Subject: [PATCH] DOC: utils.hash() can change with pandas>=2.2 (#442)

* DOC: utils.hash() can change with pandas>=2.2

* Fix rebasing
---
 audformat/core/utils.py |  6 ++++++
 tests/test_utils.py     | 44 +++++++++++++++++++++++++++++++++++++++++
 2 files changed, 50 insertions(+)

diff --git a/audformat/core/utils.py b/audformat/core/utils.py
index b201808a..8945357d 100644
--- a/audformat/core/utils.py
+++ b/audformat/core/utils.py
@@ -672,6 +672,12 @@ def hash(
     independent of the ordering of the elements,
     and level or column names.
 
+    .. warning::
+
+        If ``obj`` is a dataframe or series
+        with data type ``"Int64"``,
+        the returned hash value changes with ``pandas>=2.2.0``.
+
     Args:
         obj: object
 
diff --git a/tests/test_utils.py b/tests/test_utils.py
index d124e057..79cd6028 100644
--- a/tests/test_utils.py
+++ b/tests/test_utils.py
@@ -509,6 +509,50 @@ def test_expand_file_path(tmpdir, index, root, expected):
             pd.DataFrame([0, 1], columns=["name"]),
             "-7179254265801896228",
         ),
+        pytest.param(
+            pd.DataFrame(
+                [0, 1, 2],
+                pd.Index([0, 1, 2], dtype="Int64"),
+            ),
+            "5440931770055407318",
+            marks=pytest.mark.skipif(
+                pd.__version__ >= "2.2.0",
+                reason="Changed in pandas 2.2.0",
+            ),
+        ),
+        pytest.param(
+            pd.DataFrame(
+                [0, 1, 2],
+                pd.Index([0, 1, 2], dtype="Int64"),
+            ),
+            "-5491649331962632325",
+            marks=pytest.mark.skipif(
+                pd.__version__ < "2.2.0",
+                reason="Changed in pandas 2.2.0",
+            ),
+        ),
+        pytest.param(
+            pd.Series(
+                [0, 1, 2],
+                pd.Index([0, 1, 2], dtype="Int64"),
+            ),
+            "5440931770055407318",
+            marks=pytest.mark.skipif(
+                pd.__version__ >= "2.2.0",
+                reason="Changed in pandas 2.2.0",
+            ),
+        ),
+        pytest.param(
+            pd.Series(
+                [0, 1, 2],
+                pd.Index([0, 1, 2], dtype="Int64"),
+            ),
+            "-5491649331962632325",
+            marks=pytest.mark.skipif(
+                pd.__version__ < "2.2.0",
+                reason="Changed in pandas 2.2.0",
+            ),
+        ),
     ],
 )
 def test_hash(obj, expected):