Merge branch 'rework-fix-9011' of https://github.com/ahjulstad/pandas into ahjulstad-rework-fix-9011

Author: jreback

pandas/tseries/tests/test_timedeltas.py

@@ -852,6 +852,13 @@ def test_constructor(self):
                                  pd.offsets.Second(3)])
         tm.assert_index_equal(result,expected)
 
+        expected = TimedeltaIndex(['0 days 00:00:00', '0 days 00:00:01', '0 days 00:00:02'])
+        tm.assert_index_equal(TimedeltaIndex(range(3), unit='s'), expected)
+        expected = TimedeltaIndex(['0 days 00:00:00', '0 days 00:00:05', '0 days 00:00:09'])
+        tm.assert_index_equal(TimedeltaIndex([0, 5, 9], unit='s'), expected)
+        expected = TimedeltaIndex(['0 days 00:00:00.400', '0 days 00:00:00.450', '0 days 00:00:01.200'])
+        tm.assert_index_equal(TimedeltaIndex([400, 450, 1200], unit='ms'), expected)
+
     def test_constructor_coverage(self):
         rng = timedelta_range('1 days', periods=10.5)
         exp = timedelta_range('1 days', periods=10)

pandas/tseries/timedeltas.py

@@ -52,6 +52,7 @@ def _convert_listlike(arg, box, unit):
                     value = np.array([ _get_string_converter(r, unit=unit)() for r in arg ],dtype='m8[ns]')
                 except:
                     value = np.array([ _coerce_scalar_to_timedelta_type(r, unit=unit, coerce=coerce) for r in arg ])
+            value = value.astype('timedelta64[ns]', copy=False)
 
         if box:
             from pandas import TimedeltaIndex