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TST: Add regression test for pivot on empty frame with period dtype (GH62705) #63003

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Merged
merged 2 commits into from
Nov 6, 2025
Merged

TST: Add regression test for pivot on empty frame with period dtype (GH62705) #63003

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TST: Add regression test for pivot on empty frame with period dtype
Nithurshen Nov 6, 2025
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Nithurshen Nov 6, 2025
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17 changes: 17 additions & 0 deletions pandas/tests/reshape/test_pivot.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2942,3 +2942,20 @@ def test_pivot_with_pyarrow_categorical(self):
tm.assert_frame_equal(
df, df_expected, check_dtype=False, check_column_type=False
)

@pytest.mark.parametrize("freq", ["D", "M", "Q", "Y"])
def test_pivot_empty_dataframe_period_dtype(self, freq):
# GH#62705

dtype = pd.PeriodDtype(freq=freq)
df = DataFrame({"index": [], "columns": [], "values": []})
df = df.astype({"values": dtype})
result = df.pivot(index="index", columns="columns", values="values")

expected_index = Index([], name="index", dtype="float64")
expected_columns = Index([], name="columns", dtype="float64")
expected = DataFrame(
index=expected_index, columns=expected_columns, dtype=dtype
)

tm.assert_frame_equal(result, expected)
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