      "    def test_build_order_circular(self):\n",
      "        self.dependencies.append(Dependency('e', 'f'))\n",
      "        build_order = BuildOrder(self.dependencies)\n",
      "        processed_nodes = build_order.find_build_order()\n",
      "        assert_true(processed_nodes is None)\n",
      "\n",
      "        print('Success: test_build_order_circular')\n",
      "\n",
      "\n",
      "def main():\n",
 
</s>
    "        self.assertTrue(processed_nodes is None)\n",
      "    def test_build_order_circular(self):\n",
      "        self.dependencies.append(Dependency('e', 'f'))\n",
      "        build_order = BuildOrder(self.dependencies)\n",
      "        processed_nodes = build_order.find_build_order()\n",
    "        self.assertTrue(processed_nodes is None)\n",
      "\n",
      "        print('Success: test_build_order_circular')\n",
      "\n",
      "\n",
      "def main():\n",
keep keep keep keep replace keep keep keep keep keep
 #273: Remove nose dependency for graphs_trees/ (#277)
graphs_trees/graph_build_order/build_order_solution.ipynb