      "        root = Node(5)\n",
      "        left = Node(5)\n",
      "        right = Node(8)\n",
      "        invalid = Node(20)\n",
      "        root.left = left\n",
      "        root.right = right\n",
      "        root.left.right = invalid\n",
      "        assert_equal(validate_bst(root), False)\n",
      "\n",
      "        print('Success: test_bst_validate')\n",
      "\n",
      "\n",
      "def main():\n",
 
</s>
    "        bst.root.left = left\n",
    "        bst.root.right = right\n",
    "        bst.root.left.right = invalid\n",
    "        assert_equal(bst.validate(), False)\n",
      "        root = Node(5)\n",
      "        left = Node(5)\n",
      "        right = Node(8)\n",
      "        invalid = Node(20)\n",
    "        bst.root.left = left\n",
    "        bst.root.right = right\n",
    "        bst.root.left.right = invalid\n",
    "        assert_equal(bst.validate(), False)\n",
    "        bst.root.left = left\n",
    "        bst.root.right = right\n",
    "        bst.root.left.right = invalid\n",
    "        assert_equal(bst.validate(), False)\n",
    "        bst.root.left = left\n",
    "        bst.root.right = right\n",
    "        bst.root.left.right = invalid\n",
    "        assert_equal(bst.validate(), False)\n",
    "        bst.root.left = left\n",
    "        bst.root.right = right\n",
    "        bst.root.left.right = invalid\n",
    "        assert_equal(bst.validate(), False)\n",
      "\n",
      "        print('Success: test_bst_validate')\n",
      "\n",
      "\n",
      "def main():\n",
keep keep keep keep replace replace replace replace keep keep keep keep keep
 Move bst validate to a class (#98)
graphs_trees/bst_validate/bst_validate_solution.ipynb