      "\n",
      "\n",
      "class TestGraph(object):\n",
      "\n",
      "    def test_graph(self):\n",
      "        graph = Graph()\n",
      "        for id in range(0, 6):\n",
      "            graph.add_node(id)\n",
      "        graph.add_edge(0, 1, 5)\n",
      "        graph.add_edge(0, 5, 2)\n",
 
</s>
    "    def create_graph(self):\n",
      "\n",
      "\n",
      "class TestGraph(object):\n",
      "\n",
    "    def create_graph(self):\n",
      "        graph = Graph()\n",
      "        for id in range(0, 6):\n",
      "            graph.add_node(id)\n",
      "        graph.add_edge(0, 1, 5)\n",
      "        graph.add_edge(0, 5, 2)\n",
keep keep keep keep replace keep keep keep keep keep
 Rework graph challenge and solution (#86)
graphs_trees/graph/graph_solution.ipynb