      }
     ],
     "source": [
      "%%writefile test_n_stacks.py\n",
      "from nose.tools import assert_equal\n",
      "from nose.tools import raises\n",
      "\n",
      "\n",
      "class TestStacks(object):\n",
      "\n",
      "    @raises(Exception)\n",
 
</s> remove     "from nose.tools import assert_equal\n",
    "from nose.tools import raises\n",
 </s> add     "import unittest\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", </s> remove     "from nose.tools import assert_equal\n",
 </s> add     "import unittest\n", </s> remove     "class TestStacks(object):\n",
 </s> add     "class TestStacks(unittest.TestCase):\n",
    "import unittest\n",
      }
     ],
     "source": [
      "%%writefile test_n_stacks.py\n",
    "import unittest\n",
    "import unittest\n",
      "\n",
      "\n",
      "class TestStacks(object):\n",
      "\n",
      "    @raises(Exception)\n",
keep keep keep keep replace replace keep keep keep keep keep
 #273: Remove nose dependency for stacks_queues/ (#276) 
stacks_queues/n_stacks/n_stacks_solution.ipynb