      "        assert_equal(str(self.results), \"[1, 2, 3, 5, 8]\")\n",
      "        self.results.clear_results()\n",
      "\n",
      "        bst.pre_order_traversal(bst.root, self.results.add_result)\n",
      "        assert_equal(str(self.results), \"[5, 2, 1, 3, 8]\")\n",
      "        self.results.clear_results()\n",
      "\n",
      "        bst.post_order_traversal(bst.root, self.results.add_result)\n",
      "        assert_equal(str(self.results), \"[1, 3, 2, 8, 5]\")\n",
      "        self.results.clear_results()\n",
 
</s> remove     "        assert_equal(str(self.results), \"[5, 2, 1, 3, 8]\")\n",
 </s> add     "        self.assertEqual(str(self.results), \"[5, 2, 1, 3, 8]\")\n", </s> remove     "        assert_equal(str(self.results), \"[1, 2, 3, 5, 8]\")\n",
 </s> add     "        self.assertEqual(str(self.results), \"[1, 2, 3, 5, 8]\")\n", </s> remove     "        assert_equal(str(self.results), \"[1, 2, 3, 5, 8]\")\n",
 </s> add     "        self.assertEqual(str(self.results), \"[1, 2, 3, 5, 8]\")\n", </s> remove     "        assert_equal(str(self.results), \"[1, 3, 2, 8, 5]\")\n",
 </s> add     "        self.assertEqual(str(self.results), \"[1, 3, 2, 8, 5]\")\n", </s> remove     "        assert_equal(str(self.results), \"[1, 3, 2, 8, 5]\")\n",
 </s> add     "        self.assertEqual(str(self.results), \"[1, 3, 2, 8, 5]\")\n",
    "        self.assertEqual(str(self.results), \"[5, 2, 1, 3, 8]\")\n",
      "        assert_equal(str(self.results), \"[1, 2, 3, 5, 8]\")\n",
      "        self.results.clear_results()\n",
      "\n",
      "        bst.pre_order_traversal(bst.root, self.results.add_result)\n",
    "        self.assertEqual(str(self.results), \"[5, 2, 1, 3, 8]\")\n",
      "        self.results.clear_results()\n",
      "\n",
      "        bst.post_order_traversal(bst.root, self.results.add_result)\n",
      "        assert_equal(str(self.results), \"[1, 3, 2, 8, 5]\")\n",
      "        self.results.clear_results()\n",
keep keep keep keep replace keep keep keep keep keep
 #273: Remove nose dependency for graphs_trees/ (#277) 
graphs_trees/tree_dfs/dfs_challenge.ipynb