      "# %load test_stack.py\n",
      "from nose.tools import assert_equal\n",
      "\n",
      "\n",
      "class TestStack(object):\n",
      "\n",
      "    # TODO: It would be better if we had unit tests for each\n",
      "    # method in addition to the following end-to-end test\n",
      "    def test_end_to_end(self):\n",
      "        print('Test: Empty stack')\n",
 
</s> remove     "class TestStack(object):\n",
 </s> add     "class TestStack(unittest.TestCase):\n", </s> remove     "class TestQueue(object):\n",
 </s> add     "class TestQueue(unittest.TestCase):\n", </s> remove     "class TestQueue(object):\n",
 </s> add     "class TestQueue(unittest.TestCase):\n", </s> remove class TestStack(object):
 </s> add class TestStack(unittest.TestCase): </s> remove     "from nose.tools import assert_equal\n",
 </s> add     "import unittest\n",
    "class TestStack(unittest.TestCase):\n",
      "# %load test_stack.py\n",
      "from nose.tools import assert_equal\n",
      "\n",
      "\n",
    "class TestStack(unittest.TestCase):\n",
      "\n",
      "    # TODO: It would be better if we had unit tests for each\n",
      "    # method in addition to the following end-to-end test\n",
      "    def test_end_to_end(self):\n",
      "        print('Test: Empty stack')\n",
keep keep keep keep replace keep keep keep keep keep
 #273: Remove nose dependency for stacks_queues/ (#276) 
stacks_queues/stack/stack_challenge.ipynb