levels compat

Author: jreback

pandas/core/indexes/base.py

@@ -1102,11 +1102,6 @@ def _assert_can_do_op(self, value):
     def nlevels(self):
         return 1
 
-    @property
-    def levels(self):
-        """ return a list my levels """
-        return [list(self)]
-
     def _get_names(self):
         return FrozenList((self.name, ))
 

pandas/core/window.py

@@ -1881,15 +1881,15 @@ def dataframe_from_int_dict(data, frame_template):
                     # set the index and reorder
                     if arg2.columns.nlevels > 1:
                         result.index = MultiIndex.from_product(
-                            arg2.columns.levels + result_index.levels)
+                            arg2.columns.levels + [result_index])
                         result = result.reorder_levels([2, 0, 1]).sort_index()
                     else:
                         result.index = MultiIndex.from_product(
                             [range(len(arg2.columns)),
                              range(len(result_index))])
                         result = result.swaplevel(1, 0).sort_index()
                         result.index = MultiIndex.from_product(
-                            result_index.levels + arg2.columns.levels)
+                            [result_index] + [arg2.columns])
                 else:
 
                     # empty result