      "# %load test_math_ops.py\n",
      "from nose.tools import assert_equal, assert_true, assert_raises\n",
      "\n",
      "\n",
      "class TestMathOps(object):\n",
      "\n",
      "    def test_math_ops(self):\n",
      "        solution = Solution()\n",
      "        assert_raises(TypeError, solution.insert, None)\n",
      "        solution.insert(5)\n",
 
</s> remove     "class TestMathOps(object):\n",
 </s> add     "class TestMathOps(unittest.TestCase):\n", </s> remove     "        assert_raises(TypeError, solution.insert, None)\n",
 </s> add     "        self.assertRaises(TypeError, solution.insert, None)\n", </s> remove     "        assert_raises(TypeError, solution.insert, None)\n",
 </s> add     "        self.assertRaises(TypeError, solution.insert, None)\n", </s> remove     "from nose.tools import assert_equal, assert_true, assert_raises\n",
 </s> add     "import unittest\n", </s> remove     "from nose.tools import assert_equal, assert_true, assert_raises\n",
 </s> add     "import unittest\n",
    "class TestMathOps(unittest.TestCase):\n",
      "# %load test_math_ops.py\n",
      "from nose.tools import assert_equal, assert_true, assert_raises\n",
      "\n",
      "\n",
    "class TestMathOps(unittest.TestCase):\n",
      "\n",
      "    def test_math_ops(self):\n",
      "        solution = Solution()\n",
      "        assert_raises(TypeError, solution.insert, None)\n",
      "        solution.insert(5)\n",
keep keep keep keep replace keep keep keep keep keep
 #273: Remove nose dependency for math_probability/ (#281) 
math_probability/math_ops/math_ops_challenge.ipynb