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DOC: show failing string on numeric parse #13773

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Merged
merged 4 commits into from
Jul 26, 2016
Merged

DOC: show failing string on numeric parse #13773

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e08c587
DOC: show failing string on numeric parse
chris-b1 Jul 24, 2016
7de7c9a
also show row number
chris-b1 Jul 24, 2016
f267257
fix py3 change row message
chris-b1 Jul 26, 2016
13bfd11
call row position
chris-b1 Jul 26, 2016
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4 changes: 2 additions & 2 deletions pandas/src/inference.pyx
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Original file line number Diff line number Diff line change
Expand Up @@ -686,9 +686,9 @@ def maybe_convert_numeric(object[:] values, set na_values,
raise ValueError('integer out of range')
else:
seen_float = True
except:
except (TypeError, ValueError) as e:
if not coerce_numeric:
raise
raise type(e)(str(e) + ' at position {}'.format(i))

floats[i] = nan
seen_float = True
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2 changes: 1 addition & 1 deletion pandas/src/parse_helper.h
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Expand Up @@ -66,7 +66,7 @@ int floatify(PyObject* str, double *result, int *maybe_int) {
return 0;

parsingerror:
PyErr_SetString(PyExc_ValueError, "Unable to parse string");
PyErr_Format(PyExc_ValueError, "Unable to parse string \"%s\"", data);
Py_XDECREF(tmp);
return -1;

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11 changes: 9 additions & 2 deletions pandas/tools/tests/test_util.py
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Expand Up @@ -120,7 +120,8 @@ def test_series_numeric(self):

def test_error(self):
s = pd.Series([1, -3.14, 'apple'])
with tm.assertRaises(ValueError):
msg = 'Unable to parse string "apple" at position 2'
with tm.assertRaisesRegexp(ValueError, msg):
to_numeric(s, errors='raise')

res = to_numeric(s, errors='ignore')
Expand All @@ -131,9 +132,15 @@ def test_error(self):
expected = pd.Series([1, -3.14, np.nan])
tm.assert_series_equal(res, expected)

s = pd.Series(['orange', 1, -3.14, 'apple'])
msg = 'Unable to parse string "orange" at position 0'
with tm.assertRaisesRegexp(ValueError, msg):
to_numeric(s, errors='raise')

def test_error_seen_bool(self):
s = pd.Series([True, False, 'apple'])
with tm.assertRaises(ValueError):
msg = 'Unable to parse string "apple" at position 2'
with tm.assertRaisesRegexp(ValueError, msg):
to_numeric(s, errors='raise')

res = to_numeric(s, errors='ignore')
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