      "# %load test_shortest_path.py\n",
      "from nose.tools import assert_equal\n",
      "\n",
      "\n",
      "class TestShortestPath(object):\n",
      "\n",
      "    def test_shortest_path(self):\n",
      "        nodes = []\n",
      "        graph = GraphShortestPath()\n",
      "        for id in range(0, 6):\n",
 
</s> remove     "class TestShortestPath(object):\n",
 </s> add     "class TestShortestPath(unittest.TestCase):\n", </s> remove     "class TestPathExists(object):\n",
 </s> add     "class TestPathExists(unittest.TestCase):\n", </s> remove     "class TestPathExists(object):\n",
 </s> add     "class TestPathExists(unittest.TestCase):\n", </s> remove     "class TestGraph(object):\n",
 </s> add     "class TestGraph(unittest.TestCase):\n", </s> remove     "class TestShortestPath(object):\n",
 </s> add     "class TestShortestPath(unittest.TestCase):\n",
    "class TestShortestPath(unittest.TestCase):\n",
      "# %load test_shortest_path.py\n",
      "from nose.tools import assert_equal\n",
      "\n",
      "\n",
    "class TestShortestPath(unittest.TestCase):\n",
      "\n",
      "    def test_shortest_path(self):\n",
      "        nodes = []\n",
      "        graph = GraphShortestPath()\n",
      "        for id in range(0, 6):\n",
keep keep keep keep replace keep keep keep keep keep
 #273: Remove nose dependency for graphs_trees/ (#277) 
graphs_trees/graph_shortest_path_unweighted/shortest_path_challenge.ipynb