      "class TestPermutations(object):\n",
      "\n",
      "    def test_permutations(self):\n",
      "        permutations = Permutations()\n",
      "        assert_equal(permutations.find_permutations(None), None)\n",
      "        assert_equal(permutations.find_permutations(''), '')\n",
      "        string = 'AABC'\n",
      "        expected = [\n",
      "            'AABC', 'AACB', 'ABAC', 'ABCA',\n",
      "            'ACAB', 'ACBA', 'BAAC', 'BACA',\n",
      "            'BCAA', 'CAAB', 'CABA', 'CBAA'\n",
 
</s>
    "        self.assertEqual(permutations.find_permutations(None), None)\n",
    "        self.assertEqual(permutations.find_permutations(''), '')\n",
      "class TestPermutations(object):\n",
      "\n",
      "    def test_permutations(self):\n",
      "        permutations = Permutations()\n",
    "        self.assertEqual(permutations.find_permutations(None), None)\n",
    "        self.assertEqual(permutations.find_permutations(''), '')\n",
    "        self.assertEqual(permutations.find_permutations(None), None)\n",
    "        self.assertEqual(permutations.find_permutations(''), '')\n",
      "        string = 'AABC'\n",
      "        expected = [\n",
      "            'AABC', 'AACB', 'ABAC', 'ABCA',\n",
      "            'ACAB', 'ACBA', 'BAAC', 'BACA',\n",
      "            'BCAA', 'CAAB', 'CABA', 'CBAA'\n",
keep keep keep keep replace replace keep keep keep keep keep
 #273: Remove nose dependency for recursion_dynamic/ (#280)
recursion_dynamic/permutations/permutations_solution.ipynb