[GitHub] [arrow] AlenkaF commented on a diff in pull request #34445: GH-34283 [Python] Add types_mapper support to index for to_pandas

["AlenkaF (via GitHub)" <gi...@apache.org>]

AlenkaF commented on code in PR #34445:
URL: https://github.com/apache/arrow/pull/34445#discussion_r1126116923


##########
python/pyarrow/tests/test_pandas.py:
##########
@@ -647,6 +647,23 @@ def test_mismatch_metadata_schema(self):
             result = new_table.to_pandas()
             tm.assert_frame_equal(result, expected)
 
+    @pytest.mark.parametrize("index", ["a", ["a", "b"]])
+    def test_to_pandas_types_mapper_index(self, index):
+        if Version(pd.__version__) < Version("1.5.0"):
+            pytest.skip("ArrowDtype missing")
+        df = pd.DataFrame(
+            {
+                "a": [1, 2],
+                "b": [3, 4],
+                "c": [5, 6],
+            },
+            dtype=pd.ArrowDtype(pa.int64()),
+        ).set_index(index)
+        expected = df.copy()

Review Comment:
   Why is the copy needed?



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