Add tests for scalar row + slice columns dtype preservation

Author: GitHub Actions

pandas/tests/indexing/test_iloc.py

@@ -1548,3 +1548,11 @@ def test_setitem_pyarrow_int_series(self):
 
         expected = Series([7, 8, 3], dtype="int64[pyarrow]")
         tm.assert_series_equal(ser, expected)
+
+
+    def test_iloc_scalar_row_slice_columns_dtype(self):
+        # GH 63071
+        df = DataFrame([["a", 1.0, 2.0], ["b", 3.0, 4.0]])
+        result = df.iloc[0, 1:]
+        expected = Series([1.0, 2.0], index=[1, 2], dtype=float, name=0)
+        tm.assert_series_equal(result, expected)

pandas/tests/indexing/test_loc.py

@@ -69,6 +69,14 @@ def test_loc_dtype():
     tm.assert_series_equal(result, expected)
 
 
+def test_loc_scalar_row_slice_columns_dtype():
+    # GH 63071
+    df = DataFrame([["a", 1.0, 2.0], ["b", 3.0, 4.0]])
+    result = df.loc[0, 1:]
+    expected = Series([1.0, 2.0], index=[1, 2], dtype=float, name=0)
+    tm.assert_series_equal(result, expected)
+
+
 class TestLoc:
     def test_none_values_on_string_columns(self, using_infer_string):
         # Issue #32218