pylint fixes, new test

Author: dickreuter

pandas/tests/frame/test_alter_axes.py

@@ -394,8 +394,9 @@ def test_dti_set_index_reindex(self):
 
     def test_set_index_tuple(self):
         # test for fix of issue #15457, where the following raised a TypeError
-        df = DataFrame([[2, 1, 2], [4, (1, 2), 3]]).set_index([0, 1])
-        assert df.to_dict() == {2: {(2, 1): 2, (4, (1, 2)): 3}}
+        expected = pd.DataFrame([[2, 1], [4, (1, 2)]]).set_index([0, 1]).index
+        result = pd.MultiIndex.from_tuples([(2, 1), (4, (1, 2))], names=(0, 1))
+        tm.assert_index_equal(expected, result)
 
     # Renaming
 

pandas/tests/indexes/multi/test_constructor.py

@@ -463,4 +463,3 @@ def test_tuples_with_name_string():
         pd.Index(li, name='abc')
     with pytest.raises(ValueError):
         pd.Index(li, name='a')
-