      }
     ],
     "source": [
      "%%writefile test_is_power_of_two.py\n",
      "from nose.tools import assert_equal, assert_raises\n",
      "\n",
      "\n",
      "class TestSolution(object):\n",
      "\n",
      "    def test_is_power_of_two(self):\n",
 
</s> remove     "from nose.tools import assert_equal, assert_raises\n",
 </s> add     "import unittest\n", </s> remove     "class TestSolution(object):\n",
 </s> add     "class TestSolution(unittest.TestCase):\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", </s> remove     "from nose.tools import assert_equal, assert_raises\n",
 </s> add     "import unittest\n",
    "import unittest\n",
      }
     ],
     "source": [
      "%%writefile test_is_power_of_two.py\n",
    "import unittest\n",
      "\n",
      "\n",
      "class TestSolution(object):\n",
      "\n",
      "    def test_is_power_of_two(self):\n",
keep keep keep keep replace keep keep keep keep keep
 #273: Remove nose dependency for math_probability/ (#281) 
math_probability/power_two/power_two_solution.ipynb