BUG: Series.tolist override for datetime64 #2447

pandas/core/series.py

@@ -1141,6 +1141,15 @@ def copy(self, order='C'):
         return Series(self.values.copy(order), index=self.index,
                       name=self.name)
 
+    def tolist(self):
+        """
+        Convert Series to a nested list
+        Overrides numpy.ndarray.tolist
+        """
+        if com.is_datetime64_dtype(self):
+            return self.astype(object).values.tolist()
+        return self.values.tolist()
+
     def to_dict(self):
         """
         Convert Series to {label -> value} dict

pandas/tests/test_series.py

@@ -2183,6 +2183,18 @@ def test_to_csv_unicode_index(self):
 
         assert_series_equal(s, s2)
 
+    def test_tolist(self):
+        rs = self.ts.tolist()
+        xp = self.ts.values.tolist()
+        assert_almost_equal(rs, xp)
+
+        #datetime64
+        s = Series(self.ts.index)
+        rs = s.tolist()
+        xp = s.astype(object).values.tolist()
+        assert_almost_equal(rs, xp)
+        self.assertEqual(self.ts.index[0], rs[0])
+
     def test_to_dict(self):
         self.assert_(np.array_equal(Series(self.ts.to_dict()), self.ts))