BUG: box Timestamps in Series/DataFrame.iget_value. close #2148

Author: wesm

RELEASE.rst

@@ -56,6 +56,7 @@ pandas 0.9.1
   - Alias Timestamp.astimezone to tz_convert, so will yield Timestamp (#2060)
   - Fix timedelta64 formatting from Series (#2165, #2146)
   - Handle None values gracefully in dict passed to Panel constructor (#2075)
+  - Box datetime64 values as Timestamp objects in Series/DataFrame.iget (#2148)
 
 pandas 0.9.0
 ============

pandas/core/series.py

@@ -734,14 +734,19 @@ def iget_value(self, i):
         -------
         value : scalar (int) or Series (slice, sequence)
         """
-        if isinstance(i, slice):
-            return self[i]
-        else:
-            label = self.index[i]
-            if isinstance(label, Index):
-                return self.reindex(label)
+        try:
+            return lib.get_value_at(self, i)
+        except IndexError:
+            raise
+        except:
+            if isinstance(i, slice):
+                return self[i]
             else:
-                return lib.get_value_at(self, i)
+                label = self.index[i]
+                if isinstance(label, Index):
+                    return self.reindex(label)
+                else:
+                    return lib.get_value_at(self, i)
 
     iget = iget_value
     irow = iget_value

pandas/src/engines.pyx

@@ -39,6 +39,8 @@ cdef inline is_definitely_invalid_key(object val):
             or PyList_Check(val))
 
 def get_value_at(ndarray arr, object loc):
+    if arr.descr.type_num == NPY_DATETIME:
+        return Timestamp(util.get_value_at(arr, loc))
     return util.get_value_at(arr, loc)
 
 def set_value_at(ndarray arr, object loc, object val):

pandas/tseries/tests/test_timeseries.py

@@ -216,6 +216,8 @@ def test_series_box_timestamp(self):
         s = Series(rng, index=rng)
         self.assert_(isinstance(s[5], Timestamp))
 
+        self.assert_(isinstance(s.iget_value(5), Timestamp))
+
     def test_timestamp_to_datetime(self):
         _skip_if_no_pytz()
         rng = date_range('20090415', '20090519',