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BUG: Bug in sum of a timedelta64[ns] series (GH6462) #6475

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Merged
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Feb 25, 2014
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BUG: Bug in sum of a timedelta64[ns] series (GH6462) #6475

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1 change: 1 addition & 0 deletions doc/source/release.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -175,6 +175,7 @@ Bug Fixes
- Bug in ``str.extract`` when passed a non-default index (:issue:`6348`)
- Bug in ``str.split`` when passed ``pat=None`` and ``n=1`` (:issue:`6466`)
- Bug in ``io.data.DataReader`` when passed ``"F-F_Momentum_Factor"`` and ``data_source="famafrench"`` (:issue:`6460`)
- Bug in ``sum`` of a ``timedelta64[ns]`` series (:issue:`6462`)

pandas 0.13.1
-------------
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3 changes: 2 additions & 1 deletion pandas/core/nanops.py
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Expand Up @@ -231,7 +231,8 @@ def nansum(values, axis=None, skipna=True):
values, mask, dtype = _get_values(values, skipna, 0)
the_sum = values.sum(axis)
the_sum = _maybe_null_out(the_sum, axis, mask)
return the_sum

return _wrap_results(the_sum, dtype)


@disallow('M8')
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6 changes: 6 additions & 0 deletions pandas/tseries/tests/test_timedeltas.py
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Expand Up @@ -207,6 +207,12 @@ def test_timedelta_ops(self):
expected = to_timedelta('00:00:08')
tm.assert_almost_equal(result, expected)

# GH 6462
# consistency in returned values for sum
result = td.sum()[0]
expected = to_timedelta('00:01:21')
tm.assert_almost_equal(result, expected)

def test_to_timedelta_on_missing_values(self):
_skip_if_numpy_not_friendly()

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