making PEP8 happy

Author: realead

pandas/tests/indexes/test_base.py

@@ -1254,7 +1254,8 @@ def test_get_indexer_with_NA_values(self):
             for s in na_values:
                 if f is not s:  # otherwise not unique
                     arr = np.array([f, s], dtype=np.object)
-                    result = pd.Index(arr, dtype=np.object).get_indexer([f, s, 'Unknown'])
+                    index = pd.Index(arr, dtype=np.object)
+                    result = index.get_indexer([f, s, 'Unknown'])
                     expected = np.array([0, 1, -1], dtype=np.int64)
                     tm.assert_numpy_array_equal(result, expected)