      "class TestSolution(object):\n",
      "\n",
      "    def test_find_busiest_period(self):\n",
      "        solution = Solution()\n",
      "        assert_raises(TypeError, solution.find_busiest_period, None)\n",
      "        assert_equal(solution.find_busiest_period([]), None)\n",
      "        data = [\n",
      "            Data(3, 2, EventType.EXIT),\n",
      "            Data(1, 2, EventType.ENTER),\n",
      "            Data(3, 1, EventType.ENTER),\n",
      "            Data(7, 3, EventType.ENTER),\n",
 
</s>
    "        self.assertRaises(TypeError, solution.find_busiest_period, None)\n",
    "        self.assertEqual(solution.find_busiest_period([]), None)\n",
      "class TestSolution(object):\n",
      "\n",
      "    def test_find_busiest_period(self):\n",
      "        solution = Solution()\n",
    "        self.assertRaises(TypeError, solution.find_busiest_period, None)\n",
    "        self.assertEqual(solution.find_busiest_period([]), None)\n",
    "        self.assertRaises(TypeError, solution.find_busiest_period, None)\n",
    "        self.assertEqual(solution.find_busiest_period([]), None)\n",
      "        data = [\n",
      "            Data(3, 2, EventType.EXIT),\n",
      "            Data(1, 2, EventType.ENTER),\n",
      "            Data(3, 1, EventType.ENTER),\n",
      "            Data(7, 3, EventType.ENTER),\n",
keep keep keep keep replace replace keep keep keep keep keep
 #273: Remove nose dependency for online_judges/ (#282)
online_judges/busiest_period/busiest_period_solution.ipynb