      "\n",
      "    def test_queue_from_stacks(self):\n",
      "        print('Test: Dequeue on empty stack')\n",
      "        queue = QueueFromStacks()\n",
      "        assert_equal(queue.dequeue(), None)\n",
      "\n",
      "        print('Test: Enqueue on empty stack')\n",
      "        print('Test: Enqueue on non-empty stack')\n",
      "        print('Test: Multiple enqueue in a row')\n",
      "        num_items = 3\n",
 
</s> remove     "        assert_equal(queue.dequeue(), None)\n",
 </s> add     "        self.assertEqual(queue.dequeue(), None)\n", </s> remove         assert_equal(queue.dequeue(), None)
 </s> add         self.assertEqual(queue.dequeue(), None) </s> remove     "class TestQueueFromStacks(object):\n",
 </s> add     "class TestQueueFromStacks(unittest.TestCase):\n", </s> remove     "class TestQueueFromStacks(object):\n",
 </s> add     "class TestQueueFromStacks(unittest.TestCase):\n", </s> remove     "        assert_equal(queue.dequeue(), 0)\n",
 </s> add     "        self.assertEqual(queue.dequeue(), 0)\n",
    "        self.assertEqual(queue.dequeue(), None)\n",
      "\n",
      "    def test_queue_from_stacks(self):\n",
      "        print('Test: Dequeue on empty stack')\n",
      "        queue = QueueFromStacks()\n",
    "        self.assertEqual(queue.dequeue(), None)\n",
      "\n",
      "        print('Test: Enqueue on empty stack')\n",
      "        print('Test: Enqueue on non-empty stack')\n",
      "        print('Test: Multiple enqueue in a row')\n",
      "        num_items = 3\n",
keep keep keep keep replace keep keep keep keep keep
 #273: Remove nose dependency for stacks_queues/ (#276) 
stacks_queues/queue_from_stacks/queue_from_stacks_challenge.ipynb