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BUG: compound dtype ndarray passed to Series #30494

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Merged
merged 1 commit into from
Dec 26, 2019
Merged

BUG: compound dtype ndarray passed to Series #30494

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7 changes: 7 additions & 0 deletions pandas/core/series.py
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Original file line number Diff line number Diff line change
Expand Up @@ -235,6 +235,13 @@ def __init__(
copy = False

elif isinstance(data, np.ndarray):
if len(data.dtype):
# GH#13296 we are dealing with a compound dtype, which
# should be treated as 2D
raise ValueError(
"Cannot construct a Series from an ndarray with "
"compound dtype. Use DataFrame instead."
)
pass
elif isinstance(data, ABCSeries):
if name is None:
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8 changes: 8 additions & 0 deletions pandas/tests/series/test_constructors.py
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Expand Up @@ -67,6 +67,14 @@ def test_invalid_dtype(self):
with pytest.raises(TypeError, match=msg):
Series([], name="time", dtype=dtype)

def test_invalid_compound_dtype(self):
# GH#13296
c_dtype = np.dtype([("a", "i8"), ("b", "f4")])
cdt_arr = np.array([(1, 0.4), (256, -13)], dtype=c_dtype)

with pytest.raises(ValueError, match="Use DataFrame instead"):
Series(cdt_arr, index=["A", "B"])

def test_scalar_conversion(self):

# Pass in scalar is disabled
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