     },
     "outputs": [],
     "source": [
      "# %load test_bfs.py\n",
      "from nose.tools import assert_equal\n",
      "\n",
      "\n",
      "class TestBfs(object):\n",
      "\n",
      "    def __init__(self):\n",
 
</s> remove     "from nose.tools import assert_equal\n",
 </s> add     "import unittest\n", </s> remove     "class TestBfs(object):\n",
 </s> add     "class TestBfs(unittest.TestCase):\n", </s> remove     "class TestBfs(object):\n",
 </s> add     "class TestBfs(unittest.TestCase):\n", </s> remove     "from nose.tools import assert_equal\n",
 </s> add     "import unittest\n", </s> remove     "from nose.tools import assert_equal\n",
 </s> add     "import unittest\n",
    "import unittest\n",
     },
     "outputs": [],
     "source": [
      "# %load test_bfs.py\n",
    "import unittest\n",
      "\n",
      "\n",
      "class TestBfs(object):\n",
      "\n",
      "    def __init__(self):\n",
keep keep keep keep replace keep keep keep keep keep
 #273: Remove nose dependency for graphs_trees/ (#277) 
graphs_trees/tree_bfs/bfs_challenge.ipynb