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TST: add tests to validate margin results for pivot (#25815) #27245

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Merged
merged 4 commits into from
Jul 9, 2019
Merged

TST: add tests to validate margin results for pivot (#25815) #27245

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c5f4df6
TST: add tests to validate margin results for pivot (#25815)
peterpanmj Jul 5, 2019
7547903
fix style errors, construct expected results manually
peterpanmj Jul 8, 2019
0c8a66c
force to use same dtype in tests
peterpanmj Jul 8, 2019
c536e78
fix style errors in pivot test
peterpanmj Jul 9, 2019
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21 changes: 21 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 @@ -286,6 +286,27 @@ def test_pivot_with_interval_index(self, interval_values, dropna):
expected = DataFrame({"B": 1}, index=Index(interval_values.unique(), name="A"))
tm.assert_frame_equal(result, expected)

def test_pivot_with_interval_index_margins(self):
# GH 25815
ordered_cat = pd.IntervalIndex.from_arrays([0, 0, 1, 1], [1, 1, 2, 2])
df = pd.DataFrame(
{
"A": np.arange(4, 0, -1).astype('int32'),
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Suggested change
"A": np.arange(4, 0, -1).astype('int32'),
"A": np.arange(4, 0, -1, dtype=np.intp),

"B": ["a", "b", "a", "b"],
"C": pd.Categorical(ordered_cat, ordered=True).sort_values(
ascending=False
),
}
)

pivot_tab = pd.pivot_table(
df, index="C", columns="B", values="A", aggfunc="sum", margins=True
)

result = pivot_tab["All"]
expected = pd.Series([3, 7, 10], index=result.index, name="All", dtype="int32")
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Suggested change
expected = pd.Series([3, 7, 10], index=result.index, name="All", dtype="int32")
expected = Series(
[3, 7, 10],
index=Index([pd.Interval(0, 1), pd.Interval(1, 2), "All"], name="C"),
name="All",
)

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Why not using index from result , seems easier ?

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I'm not sure that would be in the spirit of constructing the expected result explicitly as suggested in #27245 (comment)

tm.assert_series_equal(result, expected)

def test_pass_array(self):
result = self.data.pivot_table("D", index=self.data.A, columns=self.data.C)
expected = self.data.pivot_table("D", index="A", columns="C")
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