      "# %load test_bst_second_largest.py\n",
      "from nose.tools import assert_equal, assert_raises\n",
      "\n",
      "\n",
      "class TestBstSecondLargest(object):\n",
      "\n",
      "    def test_bst_second_largest(self):\n",
      "        bst = Solution(None)\n",
      "        assert_raises(TypeError, bst.find_second_largest)\n",
      "        root = Node(10)\n",
 
</s> remove     "class TestBstSecondLargest(object):\n",
 </s> add     "class TestBstSecondLargest(unittest.TestCase):\n", </s> remove     "        assert_raises(TypeError, bst.find_second_largest)\n",
 </s> add     "        self.assertRaises(TypeError, bst.find_second_largest)\n", </s> remove     "        assert_raises(TypeError, bst.find_second_largest)\n",
 </s> add     "        self.assertRaises(TypeError, bst.find_second_largest)\n", </s> remove     "from nose.tools import assert_equal, assert_raises\n",
 </s> add     "import unittest\n", </s> remove     "from nose.tools import assert_equal, assert_raises\n",
 </s> add     "import unittest\n",
    "class TestBstSecondLargest(unittest.TestCase):\n",
      "# %load test_bst_second_largest.py\n",
      "from nose.tools import assert_equal, assert_raises\n",
      "\n",
      "\n",
    "class TestBstSecondLargest(unittest.TestCase):\n",
      "\n",
      "    def test_bst_second_largest(self):\n",
      "        bst = Solution(None)\n",
      "        assert_raises(TypeError, bst.find_second_largest)\n",
      "        root = Node(10)\n",
keep keep keep keep replace keep keep keep keep keep
 #273: Remove nose dependency for graphs_trees/ (#277) 
graphs_trees/bst_second_largest/bst_second_largest_challenge.ipynb