BUG: pd.Timedelta np.int, np.float. fixes #8757

doc/source/whatsnew/v0.15.2.txt

@@ -61,3 +61,4 @@ Bug Fixes
 - ``io.data.Options`` now raises ``RemoteDataError`` when no expiry dates are available from Yahoo and when it receives no data from Yahoo (:issue:`8761`), (:issue:`8783`).
 - Bug in slicing a multi-index with an empty list and at least one boolean indexer (:issue:`8781`)
 - ``io.data.Options`` now raises ``RemoteDataError`` when no expiry dates are available from Yahoo (:issue:`8761`).
+- ``Timedelta`` kwargs may now be numpy ints and floats (:issue:`8757`).

pandas/tseries/tests/test_timedeltas.py

@@ -38,12 +38,24 @@ def test_construction(self):
         self.assertEqual(Timedelta(10.0,unit='d').value, expected)
         self.assertEqual(Timedelta('10 days').value, expected)
         self.assertEqual(Timedelta(days=10).value, expected)
+        self.assertEqual(Timedelta(days=10.0).value, expected)
 
         expected += np.timedelta64(10,'s').astype('m8[ns]').view('i8')
         self.assertEqual(Timedelta('10 days 00:00:10').value, expected)
         self.assertEqual(Timedelta(days=10,seconds=10).value, expected)
         self.assertEqual(Timedelta(days=10,milliseconds=10*1000).value, expected)
         self.assertEqual(Timedelta(days=10,microseconds=10*1000*1000).value, expected)
+
+        # test construction with np dtypes
+        # GH 8757
+        timedelta_kwargs = {'days':'D', 'seconds':'s', 'microseconds':'us', 
+                            'milliseconds':'ms', 'minutes':'m', 'hours':'h', 'weeks':'W'}
+        npdtypes = [np.int64, np.int32, np.int16, 
+                    np.float64, np.float32, np.float16]
+        for npdtype in npdtypes:
+            for pykwarg, npkwarg in timedelta_kwargs.items():
+                expected = np.timedelta64(1, npkwarg).astype('m8[ns]').view('i8')
+                self.assertEqual(Timedelta(**{pykwarg:npdtype(1)}).value, expected)
 
         # rounding cases
         self.assertEqual(Timedelta(82739999850000).value, 82739999850000)

pandas/tslib.pyx

@@ -37,7 +37,7 @@ from datetime import time as datetime_time
 from dateutil.tz import (tzoffset, tzlocal as _dateutil_tzlocal, tzfile as _dateutil_tzfile,
                          tzutc as _dateutil_tzutc, gettz as _dateutil_gettz)
 from pytz.tzinfo import BaseTzInfo as _pytz_BaseTzInfo
-from pandas.compat import parse_date, string_types, PY3
+from pandas.compat import parse_date, string_types, PY3, iteritems
 
 from sys import version_info
 import operator
@@ -1619,6 +1619,7 @@ class Timedelta(_Timedelta):
         Denote the unit of the input, if input is an integer. Default 'ns'.
     days, seconds, microseconds, milliseconds, minutes, hours, weeks : numeric, optional
         Values for construction in compat with datetime.timedelta.
+        np ints and floats will be coereced to python ints and floats.
 
     Notes
     -----
@@ -1632,9 +1633,19 @@ class Timedelta(_Timedelta):
         if value is None:
             if not len(kwargs):
                 raise ValueError("cannot construct a TimeDelta without a value/unit or descriptive keywords (days,seconds....)")
+
+            def _to_py_int_float(v):
+                if is_integer_object(v):
+                    return int(v)
+                elif is_float_object(v):
+                    return float(v)
+                raise TypeError("Invalid type {0}. Must be int or float.".format(type(v)))
+
+            kwargs = dict([ (k, _to_py_int_float(v)) for k, v in iteritems(kwargs) ])
+
             try:
                 value = timedelta(**kwargs)
-            except (TypeError):
+            except TypeError as e:
                 raise ValueError("cannot construct a TimeDelta from the passed arguments, allowed keywords are "
                                  "[days, seconds, microseconds, milliseconds, minutes, hours, weeks]")