      "        graph.add_undirected_edge(0, 1, weight=5)\n",
      "        graph.add_undirected_edge(0, 5, weight=2)\n",
      "        graph.add_undirected_edge(1, 2, weight=3)\n",
      "\n",
      "        assert_equal(graph.nodes[0].adj_weights[graph.nodes[1].key], 5)\n",
      "        assert_equal(graph.nodes[1].adj_weights[graph.nodes[0].key], 5)\n",
      "        assert_equal(graph.nodes[0].adj_weights[graph.nodes[5].key], 2)\n",
      "        assert_equal(graph.nodes[5].adj_weights[graph.nodes[0].key], 2)\n",
      "        assert_equal(graph.nodes[1].adj_weights[graph.nodes[2].key], 3)\n",
      "        assert_equal(graph.nodes[2].adj_weights[graph.nodes[1].key], 3)\n",
      "\n",
      "        print('Success: test_graph_undirected')\n",
      "\n",
      "\n",
      "def main():\n",
 
</s> remove     "        assert_equal(graph.nodes[0].adj_weights[graph.nodes[1].key], 5)\n",
    "        assert_equal(graph.nodes[1].adj_weights[graph.nodes[0].key], 5)\n",
    "        assert_equal(graph.nodes[0].adj_weights[graph.nodes[5].key], 2)\n",
    "        assert_equal(graph.nodes[5].adj_weights[graph.nodes[0].key], 2)\n",
    "        assert_equal(graph.nodes[1].adj_weights[graph.nodes[2].key], 3)\n",
    "        assert_equal(graph.nodes[2].adj_weights[graph.nodes[1].key], 3)\n",
 </s> add     "        self.assertEqual(graph.nodes[0].adj_weights[graph.nodes[1].key], 5)\n",
    "        self.assertEqual(graph.nodes[1].adj_weights[graph.nodes[0].key], 5)\n",
    "        self.assertEqual(graph.nodes[0].adj_weights[graph.nodes[5].key], 2)\n",
    "        self.assertEqual(graph.nodes[5].adj_weights[graph.nodes[0].key], 2)\n",
    "        self.assertEqual(graph.nodes[1].adj_weights[graph.nodes[2].key], 3)\n",
    "        self.assertEqual(graph.nodes[2].adj_weights[graph.nodes[1].key], 3)\n", </s> remove         assert_equal(graph.nodes[0].adj_weights[graph.nodes[1].key], 5)
        assert_equal(graph.nodes[1].adj_weights[graph.nodes[0].key], 5)
        assert_equal(graph.nodes[0].adj_weights[graph.nodes[5].key], 2)
        assert_equal(graph.nodes[5].adj_weights[graph.nodes[0].key], 2)
        assert_equal(graph.nodes[1].adj_weights[graph.nodes[2].key], 3)
        assert_equal(graph.nodes[2].adj_weights[graph.nodes[1].key], 3)
 </s> add         self.assertEqual(graph.nodes[0].adj_weights[graph.nodes[1].key], 5)
        self.assertEqual(graph.nodes[1].adj_weights[graph.nodes[0].key], 5)
        self.assertEqual(graph.nodes[0].adj_weights[graph.nodes[5].key], 2)
        self.assertEqual(graph.nodes[5].adj_weights[graph.nodes[0].key], 2)
        self.assertEqual(graph.nodes[1].adj_weights[graph.nodes[2].key], 3)
        self.assertEqual(graph.nodes[2].adj_weights[graph.nodes[1].key], 3) </s> remove     "        assert_equal(graph.nodes[0].adj_weights[graph.nodes[1].key], 5)\n",
    "        assert_equal(graph.nodes[0].adj_weights[graph.nodes[5].key], 2)\n",
    "        assert_equal(graph.nodes[1].adj_weights[graph.nodes[2].key], 3)\n",
    "        assert_equal(graph.nodes[2].adj_weights[graph.nodes[3].key], 4)\n",
    "        assert_equal(graph.nodes[3].adj_weights[graph.nodes[4].key], 5)\n",
    "        assert_equal(graph.nodes[3].adj_weights[graph.nodes[5].key], 6)\n",
    "        assert_equal(graph.nodes[4].adj_weights[graph.nodes[0].key], 7)\n",
    "        assert_equal(graph.nodes[5].adj_weights[graph.nodes[4].key], 8)\n",
    "        assert_equal(graph.nodes[5].adj_weights[graph.nodes[2].key], 9)\n",
    "\n",
    "        assert_equal(graph.nodes[0].incoming_edges, 1)\n",
    "        assert_equal(graph.nodes[1].incoming_edges, 1)\n",
    "        assert_equal(graph.nodes[2].incoming_edges, 2)\n",
    "        assert_equal(graph.nodes[3].incoming_edges, 1)\n",
    "        assert_equal(graph.nodes[4].incoming_edges, 2)\n",
    "        assert_equal(graph.nodes[5].incoming_edges, 2)\n",
 </s> add     "        self.assertEqual(graph.nodes[0].adj_weights[graph.nodes[1].key], 5)\n",
    "        self.assertEqual(graph.nodes[0].adj_weights[graph.nodes[5].key], 2)\n",
    "        self.assertEqual(graph.nodes[1].adj_weights[graph.nodes[2].key], 3)\n",
    "        self.assertEqual(graph.nodes[2].adj_weights[graph.nodes[3].key], 4)\n",
    "        self.assertEqual(graph.nodes[3].adj_weights[graph.nodes[4].key], 5)\n",
    "        self.assertEqual(graph.nodes[3].adj_weights[graph.nodes[5].key], 6)\n",
    "        self.assertEqual(graph.nodes[4].adj_weights[graph.nodes[0].key], 7)\n",
    "        self.assertEqual(graph.nodes[5].adj_weights[graph.nodes[4].key], 8)\n",
    "        self.assertEqual(graph.nodes[5].adj_weights[graph.nodes[2].key], 9)\n",
    "\n",
    "        self.assertEqual(graph.nodes[0].incoming_edges, 1)\n",
    "        self.assertEqual(graph.nodes[1].incoming_edges, 1)\n",
    "        self.assertEqual(graph.nodes[2].incoming_edges, 2)\n",
    "        self.assertEqual(graph.nodes[3].incoming_edges, 1)\n",
    "        self.assertEqual(graph.nodes[4].incoming_edges, 2)\n",
    "        self.assertEqual(graph.nodes[5].incoming_edges, 2)\n", </s> remove     "        assert_equal(graph.nodes[0].adj_weights[graph.nodes[1].key], 5)\n",
    "        assert_equal(graph.nodes[0].adj_weights[graph.nodes[5].key], 2)\n",
    "        assert_equal(graph.nodes[1].adj_weights[graph.nodes[2].key], 3)\n",
    "        assert_equal(graph.nodes[2].adj_weights[graph.nodes[3].key], 4)\n",
    "        assert_equal(graph.nodes[3].adj_weights[graph.nodes[4].key], 5)\n",
    "        assert_equal(graph.nodes[3].adj_weights[graph.nodes[5].key], 6)\n",
    "        assert_equal(graph.nodes[4].adj_weights[graph.nodes[0].key], 7)\n",
    "        assert_equal(graph.nodes[5].adj_weights[graph.nodes[4].key], 8)\n",
    "        assert_equal(graph.nodes[5].adj_weights[graph.nodes[2].key], 9)\n",
    "\n",
    "        assert_equal(graph.nodes[0].incoming_edges, 1)\n",
    "        assert_equal(graph.nodes[1].incoming_edges, 1)\n",
    "        assert_equal(graph.nodes[2].incoming_edges, 2)\n",
    "        assert_equal(graph.nodes[3].incoming_edges, 1)\n",
    "        assert_equal(graph.nodes[4].incoming_edges, 2)\n",
    "        assert_equal(graph.nodes[5].incoming_edges, 2)\n",
 </s> add     "        self.assertEqual(graph.nodes[0].adj_weights[graph.nodes[1].key], 5)\n",
    "        self.assertEqual(graph.nodes[0].adj_weights[graph.nodes[5].key], 2)\n",
    "        self.assertEqual(graph.nodes[1].adj_weights[graph.nodes[2].key], 3)\n",
    "        self.assertEqual(graph.nodes[2].adj_weights[graph.nodes[3].key], 4)\n",
    "        self.assertEqual(graph.nodes[3].adj_weights[graph.nodes[4].key], 5)\n",
    "        self.assertEqual(graph.nodes[3].adj_weights[graph.nodes[5].key], 6)\n",
    "        self.assertEqual(graph.nodes[4].adj_weights[graph.nodes[0].key], 7)\n",
    "        self.assertEqual(graph.nodes[5].adj_weights[graph.nodes[4].key], 8)\n",
    "        self.assertEqual(graph.nodes[5].adj_weights[graph.nodes[2].key], 9)\n",
    "\n",
    "        self.assertEqual(graph.nodes[0].incoming_edges, 1)\n",
    "        self.assertEqual(graph.nodes[1].incoming_edges, 1)\n",
    "        self.assertEqual(graph.nodes[2].incoming_edges, 2)\n",
    "        self.assertEqual(graph.nodes[3].incoming_edges, 1)\n",
    "        self.assertEqual(graph.nodes[4].incoming_edges, 2)\n",
    "        self.assertEqual(graph.nodes[5].incoming_edges, 2)\n", </s> remove     "        assert_equal(heap.peek_min(), 3)\n",
    "        assert_equal(heap.extract_min(), 3)\n",
    "        assert_equal(heap.peek_min(), 5)\n",
 </s> add     "        self.assertEqual(heap.peek_min(), 3)\n",
    "        self.assertEqual(heap.extract_min(), 3)\n",
    "        self.assertEqual(heap.peek_min(), 5)\n",
    "        self.assertEqual(graph.nodes[0].adj_weights[graph.nodes[1].key], 5)\n",
    "        self.assertEqual(graph.nodes[1].adj_weights[graph.nodes[0].key], 5)\n",
    "        self.assertEqual(graph.nodes[0].adj_weights[graph.nodes[5].key], 2)\n",
    "        self.assertEqual(graph.nodes[5].adj_weights[graph.nodes[0].key], 2)\n",
    "        self.assertEqual(graph.nodes[1].adj_weights[graph.nodes[2].key], 3)\n",
    "        self.assertEqual(graph.nodes[2].adj_weights[graph.nodes[1].key], 3)\n",
      "        graph.add_undirected_edge(0, 1, weight=5)\n",
      "        graph.add_undirected_edge(0, 5, weight=2)\n",
      "        graph.add_undirected_edge(1, 2, weight=3)\n",
      "\n",
    "        self.assertEqual(graph.nodes[0].adj_weights[graph.nodes[1].key], 5)\n",
    "        self.assertEqual(graph.nodes[1].adj_weights[graph.nodes[0].key], 5)\n",
    "        self.assertEqual(graph.nodes[0].adj_weights[graph.nodes[5].key], 2)\n",
    "        self.assertEqual(graph.nodes[5].adj_weights[graph.nodes[0].key], 2)\n",
    "        self.assertEqual(graph.nodes[1].adj_weights[graph.nodes[2].key], 3)\n",
    "        self.assertEqual(graph.nodes[2].adj_weights[graph.nodes[1].key], 3)\n",
    "        self.assertEqual(graph.nodes[0].adj_weights[graph.nodes[1].key], 5)\n",
    "        self.assertEqual(graph.nodes[1].adj_weights[graph.nodes[0].key], 5)\n",
    "        self.assertEqual(graph.nodes[0].adj_weights[graph.nodes[5].key], 2)\n",
    "        self.assertEqual(graph.nodes[5].adj_weights[graph.nodes[0].key], 2)\n",
    "        self.assertEqual(graph.nodes[1].adj_weights[graph.nodes[2].key], 3)\n",
    "        self.assertEqual(graph.nodes[2].adj_weights[graph.nodes[1].key], 3)\n",
    "        self.assertEqual(graph.nodes[0].adj_weights[graph.nodes[1].key], 5)\n",
    "        self.assertEqual(graph.nodes[1].adj_weights[graph.nodes[0].key], 5)\n",
    "        self.assertEqual(graph.nodes[0].adj_weights[graph.nodes[5].key], 2)\n",
    "        self.assertEqual(graph.nodes[5].adj_weights[graph.nodes[0].key], 2)\n",
    "        self.assertEqual(graph.nodes[1].adj_weights[graph.nodes[2].key], 3)\n",
    "        self.assertEqual(graph.nodes[2].adj_weights[graph.nodes[1].key], 3)\n",
    "        self.assertEqual(graph.nodes[0].adj_weights[graph.nodes[1].key], 5)\n",
    "        self.assertEqual(graph.nodes[1].adj_weights[graph.nodes[0].key], 5)\n",
    "        self.assertEqual(graph.nodes[0].adj_weights[graph.nodes[5].key], 2)\n",
    "        self.assertEqual(graph.nodes[5].adj_weights[graph.nodes[0].key], 2)\n",
    "        self.assertEqual(graph.nodes[1].adj_weights[graph.nodes[2].key], 3)\n",
    "        self.assertEqual(graph.nodes[2].adj_weights[graph.nodes[1].key], 3)\n",
    "        self.assertEqual(graph.nodes[0].adj_weights[graph.nodes[1].key], 5)\n",
    "        self.assertEqual(graph.nodes[1].adj_weights[graph.nodes[0].key], 5)\n",
    "        self.assertEqual(graph.nodes[0].adj_weights[graph.nodes[5].key], 2)\n",
    "        self.assertEqual(graph.nodes[5].adj_weights[graph.nodes[0].key], 2)\n",
    "        self.assertEqual(graph.nodes[1].adj_weights[graph.nodes[2].key], 3)\n",
    "        self.assertEqual(graph.nodes[2].adj_weights[graph.nodes[1].key], 3)\n",
    "        self.assertEqual(graph.nodes[0].adj_weights[graph.nodes[1].key], 5)\n",
    "        self.assertEqual(graph.nodes[1].adj_weights[graph.nodes[0].key], 5)\n",
    "        self.assertEqual(graph.nodes[0].adj_weights[graph.nodes[5].key], 2)\n",
    "        self.assertEqual(graph.nodes[5].adj_weights[graph.nodes[0].key], 2)\n",
    "        self.assertEqual(graph.nodes[1].adj_weights[graph.nodes[2].key], 3)\n",
    "        self.assertEqual(graph.nodes[2].adj_weights[graph.nodes[1].key], 3)\n",
      "\n",
      "        print('Success: test_graph_undirected')\n",
      "\n",
      "\n",
      "def main():\n",
keep keep keep keep replace replace replace replace replace replace keep keep keep keep keep
 #273: Remove nose dependency for graphs_trees/ (#277) 
graphs_trees/graph/graph_challenge.ipynb