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[REVIEW] Add Series.from_pandas() method #263

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[REVIEW] Add Series.from_pandas() method #263

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7 changes: 7 additions & 0 deletions pygdf/series.py
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Original file line number Diff line number Diff line change
Expand Up @@ -58,6 +58,13 @@ def from_masked_array(cls, data, mask, null_count=None):
col = columnops.as_column(data).set_mask(mask, null_count=null_count)
return cls(data=col)

@classmethod
def from_pandas(cls, series):
"""Create a Series from a Pandas.Series."""
s = cls(data=series.data)
s = s.set_index(series.index)
return s

def __init__(self, data, index=None):
if isinstance(data, Series):
index = data._index
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7 changes: 7 additions & 0 deletions pygdf/tests/test_dataframe.py
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Expand Up @@ -92,6 +92,13 @@ def test_series_basic():
a4 = np.hstack([a1, a2, a3])
np.testing.assert_equal(series.to_array(), a4)

# Make series from pandas.Series
sr = pd.Series(data=np.arange(5), index=np.arange(1, 6))
series = Series.from_pandas(sr)
assert len(series) == 5
np.testing.assert_equal(series.to_array(), np.arange(5))
np.testing.assert_equal(series.index, np.arange(1, 6))


def test_series_indexing():
a1 = np.arange(20)
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