      "        num_items = 10\n",
      "        numbers = [randint(0, 10) for x in xrange(num_items)]\n",
      "        sorted_stack = self.get_sorted_stack(numbers)\n",
      "        sorted_numbers = []\n",
      "        for _ in xrange(num_items):\n",
      "            sorted_numbers.append(sorted_stack.pop())\n",
      "        assert_equal(sorted_numbers, sorted(numbers, reverse=True))\n",
      "        \n",
      "        print('Success: test_sort_stack')\n",
      "\n",
 
</s> remove     "        for _ in xrange(num_items):\n",
 </s> add     "        for _ in range(num_items):\n", </s> remove     "        numbers = [randint(0, 10) for x in xrange(num_items)]\n",
 </s> add     "        numbers = [randint(0, 10) for x in range(num_items)]\n", </s> remove     "        numbers = [randint(0, 10) for x in xrange(num_items)]\n",
 </s> add     "        numbers = [randint(0, 10) for x in range(num_items)]\n", </s> remove         for _ in xrange(num_items):
 </s> add         for _ in range(num_items): </s> remove         numbers = [randint(0, 10) for x in xrange(num_items)]
 </s> add         numbers = [randint(0, 10) for x in range(num_items)]
    "        for _ in range(num_items):\n",
      "        num_items = 10\n",
      "        numbers = [randint(0, 10) for x in xrange(num_items)]\n",
      "        sorted_stack = self.get_sorted_stack(numbers)\n",
      "        sorted_numbers = []\n",
    "        for _ in range(num_items):\n",
      "            sorted_numbers.append(sorted_stack.pop())\n",
      "        assert_equal(sorted_numbers, sorted(numbers, reverse=True))\n",
      "        \n",
      "        print('Success: test_sort_stack')\n",
      "\n",
keep keep keep keep replace keep keep keep keep keep
 Changed xrange to range to be compatible with Python 3. 
stacks_queues/sort_stack/sort_stack_challenge.ipynb