      "        assert_equal(stack.min(), 1)\n",
      "        assert_equal(stack.pop(), 1)\n",
      "        assert_equal(stack.min(), 5)\n",
      "        assert_equal(stack.pop(), 5)\n",
      "        assert_equal(stack.min(), sys.maxint)\n",
      "\n",
      "        print('Test: Pop empty stack')\n",
      "        assert_equal(stack.pop(), None)\n",
      "        \n",
      "        print('Success: test_stack_min')\n",
 
</s>
    "        assert_equal(stack.min(), sys.maxsize)\n",
      "        assert_equal(stack.min(), 1)\n",
      "        assert_equal(stack.pop(), 1)\n",
      "        assert_equal(stack.min(), 5)\n",
      "        assert_equal(stack.pop(), 5)\n",
    "        assert_equal(stack.min(), sys.maxsize)\n",
      "\n",
      "        print('Test: Pop empty stack')\n",
      "        assert_equal(stack.pop(), None)\n",
      "        \n",
      "        print('Success: test_stack_min')\n",
keep keep keep keep replace keep keep keep keep keep
 Changed sys.maxint to sys.maxsize for Python 3 compatibility.
stacks_queues/stack_min/stack_min_solution.ipynb