Fix timedelta scalars

Author: buntwo

pandas/core/indexes/datetimelike.py

@@ -433,9 +433,7 @@ def asobject(self):
         return Index(self._box_values(self.asi8), name=self.name, dtype=object)
 
     def _convert_tolerance(self, tolerance):
-        if not is_list_like(tolerance):
-            tolerance = [tolerance]
-        return np.asarray(to_timedelta(tolerance))
+        return np.asarray(to_timedelta(tolerance, box=False))
 
     def _maybe_mask_results(self, result, fill_value=None, convert=None):
         """

pandas/core/indexes/period.py

@@ -637,7 +637,10 @@ def _maybe_convert_timedelta(self, other):
                 other, (timedelta, np.timedelta64, offsets.Tick, np.ndarray)):
             offset = frequencies.to_offset(self.freq.rule_code)
             if isinstance(offset, offsets.Tick):
-                nanos = tslib._delta_to_nanoseconds(other)
+                if isinstance(other, np.ndarray):
+                    nanos = np.vectorize(tslib._delta_to_nanoseconds)(other)
+                else:
+                    nanos = tslib._delta_to_nanoseconds(other)
                 offset_nanos = tslib._delta_to_nanoseconds(offset)
                 check = np.all(nanos % offset_nanos == 0)
                 if check:

pandas/core/tools/timedeltas.py

@@ -83,8 +83,12 @@ def to_timedelta(arg, unit='ns', box=True, errors='raise'):
     elif isinstance(arg, ABCIndexClass):
         return _convert_listlike(arg, unit=unit, box=box,
                                  errors=errors, name=arg.name)
-    elif is_list_like(arg) and getattr(arg, 'ndim', 1) == 1:
-        return _convert_listlike(arg, unit=unit, box=box, errors=errors)
+    elif is_list_like(arg) and getattr(arg, 'ndim', 1) <= 1:
+        if getattr(arg, 'ndim', 1) == 0:
+            # extract array scalar and process below
+            arg = arg[()]
+        else:
+            return _convert_listlike(arg, unit=unit, box=box, errors=errors)
     elif getattr(arg, 'ndim', 1) > 1:
         raise TypeError('arg must be a string, timedelta, list, tuple, '
                         '1-d array, or Series')

pandas/tests/indexes/datetimes/test_datetime.py

@@ -42,7 +42,7 @@ def test_get_loc(self):
         assert idx.get_loc('2000-01-01T12', method='nearest',
                            tolerance=timedelta(1)) == 1
         with tm.assert_raises_regex(ValueError,
-                'unit abbreviation w/o a number'):
+                                    'unit abbreviation w/o a number'):
             idx.get_loc('2000-01-01T12', method='nearest', tolerance='foo')
         with pytest.raises(KeyError):
             idx.get_loc('2000-01-01T03', method='nearest', tolerance='2 hours')

pandas/tests/indexes/period/test_period.py

@@ -85,7 +85,7 @@ def test_get_loc(self):
         assert idx.get_loc('2000-01-02T12', method='nearest',
                            tolerance=timedelta(1)) == 1
         with tm.assert_raises_regex(ValueError,
-                'unit abbreviation w/o a number'):
+                                    'unit abbreviation w/o a number'):
             idx.get_loc('2000-01-10', method='nearest', tolerance='foo')
 
         msg = 'Input has different freq from PeriodIndex\\(freq=D\\)'
@@ -177,8 +177,8 @@ def test_get_indexer(self):
                    pd.Timedelta('1 hour').to_timedelta64(),
                    np.timedelta64(1, 'M'), ]
         with pytest.raises(
-               IncompatibleFrequency,
-               match='Input has different freq from'):
+                IncompatibleFrequency,
+                match='Input has different freq from'):
             idx.get_indexer(target, 'nearest', tolerance=tol_bad)
 
     def test_repeat(self):

pandas/tests/indexes/timedeltas/test_timedelta.py

@@ -61,7 +61,7 @@ def test_get_loc(self):
                            tolerance=timedelta(0)) == 1
 
         with tm.assert_raises_regex(ValueError,
-                'unit abbreviation w/o a number'):
+                                    'unit abbreviation w/o a number'):
             idx.get_loc(idx[1], method='nearest', tolerance='foo')
 
         with pytest.raises(