TimedeltaIndex non-ns unit conversion (GH9011)

Author: jreback

pandas/tseries/tdi.py

@@ -181,7 +181,7 @@ def __new__(cls, data=None, unit=None,
 
         # convert if not already
         if getattr(data,'dtype',None) != _TD_DTYPE:
-            data = to_timedelta(data,unit=unit,box=False)
+            data = to_timedelta(data,box=False)
         elif copy:
             data = np.array(data,copy=True)
 

pandas/tseries/tests/test_timedeltas.py

@@ -852,13 +852,19 @@ def test_constructor(self):
                                  pd.offsets.Second(3)])
         tm.assert_index_equal(result,expected)
 
+        # GH9011
+        # non-ns unit
         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)
 
+        # no boxing
+        expected = (np.array([400, 450, 1200])*1e6).astype('i8').astype('m8[ns]')
+        tm.assert_numpy_array_equal(TimedeltaIndex([400, 450, 1200], unit='ms', box=False), 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

@@ -52,7 +52,6 @@ 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