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BUG: Bug in read_csv where squeeze=True would return a view (GH8217) #8218

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Sep 8, 2014
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BUG: Bug in read_csv where squeeze=True would return a view (GH8217) #8218

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3 changes: 2 additions & 1 deletion doc/source/v0.15.0.txt
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Expand Up @@ -480,7 +480,6 @@ Enhancements



- Bug in ``DataFrame.groupby`` where ``Grouper`` does not recognize level when frequency is specified (:issue:`7885`)



Expand Down Expand Up @@ -538,7 +537,9 @@ There are no experimental changes in 0.15.0
Bug Fixes
~~~~~~~~~

- Bug in ``read_csv`` where ``squeeze=True`` would return a view (:issue:`8217`)
- Bug in checking of table name in ``read_sql`` in certain cases (:issue:`7826`).
- Bug in ``DataFrame.groupby`` where ``Grouper`` does not recognize level when frequency is specified (:issue:`7885`)
- Bug in multiindexes dtypes getting mixed up when DataFrame is saved to SQL table (:issue:`8021`)
- Bug in Series 0-division with a float and integer operand dtypes (:issue:`7785`)
- Bug in ``Series.astype("unicode")`` not calling ``unicode`` on the values correctly (:issue:`7758`)
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2 changes: 1 addition & 1 deletion pandas/io/parsers.py
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Expand Up @@ -703,7 +703,7 @@ def read(self, nrows=None):
df = DataFrame(col_dict, columns=columns, index=index)

if self.squeeze and len(df.columns) == 1:
return df[df.columns[0]]
return df[df.columns[0]].copy()
return df

def _create_index(self, ret):
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9 changes: 9 additions & 0 deletions pandas/io/tests/test_parsers.py
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Expand Up @@ -263,6 +263,15 @@ def test_squeeze(self):
tm.assert_isinstance(result, Series)
tm.assert_series_equal(result, expected)

def test_squeeze_no_view(self):

# GH 8217
# series should not be a view

data = """time,data\n0,10\n1,11\n2,12\n4,14\n5,15\n3,13"""
result = self.read_csv(StringIO(data), index_col='time', squeeze=True)
self.assertFalse(result._is_view)

def test_inf_parsing(self):
data = """\
,A
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