Remove duplicate levels from test_frame_describe_multikey

Author: cmazzullo

pandas/tests/groupby/test_groupby.py

@@ -756,10 +756,9 @@ def test_frame_describe_multikey(self):
         desc_groups = []
         for col in self.tsframe:
             group = grouped[col].describe()
-            group_col = pd.MultiIndex([[col] * len(group.columns),
-                                       group.columns],
-                                      [[0] * len(group.columns),
-                                       range(len(group.columns))])
+            group_col = pd.MultiIndex(
+                levels=[[col], group.columns],
+                labels=[[0]*len(group.columns), range(len(group.columns))])
             group = pd.DataFrame(group.values,
                                  columns=group_col,
                                  index=group.index)
@@ -771,8 +770,8 @@ def test_frame_describe_multikey(self):
                                          'C': 1, 'D': 1}, axis=1)
         result = groupedT.describe()
         expected = self.tsframe.describe().T
-        expected.index = pd.MultiIndex([[0, 0, 1, 1], expected.index],
-                                       [range(4), range(len(expected.index))])
+        expected.index = pd.MultiIndex(levels=[[0, 1], expected.index],
+                                       labels=[[0, 0, 1, 1], range(len(expected.index))])
         tm.assert_frame_equal(result, expected)
 
     def test_frame_describe_tupleindex(self):