      "%%writefile test_unique_chars.py\n",
      "from nose.tools import assert_equal\n",
      "\n",
      "\n",
      "class TestUniqueChars(object):\n",
      "\n",
      "    def test_unique_chars(self, func):\n",
      "        assert_equal(func(None), False)\n",
      "        assert_equal(func(''), True)\n",
      "        assert_equal(func('foo'), False)\n",
 
</s> remove     "class TestUniqueChars(object):\n",
 </s> add     "class TestUniqueChars(unittest.TestCase):\n", </s> remove     "        assert_equal(func(None), False)\n",
    "        assert_equal(func(''), True)\n",
    "        assert_equal(func('foo'), False)\n",
    "        assert_equal(func('bar'), True)\n",
 </s> add     "        self.assertEqual(func(None), False)\n",
    "        self.assertEqual(func(''), True)\n",
    "        self.assertEqual(func('foo'), False)\n",
    "        self.assertEqual(func('bar'), True)\n", </s> remove     "        assert_equal(func(None), False)\n",
    "        assert_equal(func(''), True)\n",
    "        assert_equal(func('foo'), False)\n",
    "        assert_equal(func('bar'), True)\n",
 </s> add     "        self.assertEqual(func(None), False)\n",
    "        self.assertEqual(func(''), True)\n",
    "        self.assertEqual(func('foo'), False)\n",
    "        self.assertEqual(func('bar'), True)\n", </s> remove     "from nose.tools import assert_equal\n",
 </s> add     "import unittest\n", </s> remove     "class TestPermutation(object):\n",
 </s> add     "class TestPermutation(unittest.TestCase):\n",
    "class TestUniqueChars(unittest.TestCase):\n",
      "%%writefile test_unique_chars.py\n",
      "from nose.tools import assert_equal\n",
      "\n",
      "\n",
    "class TestUniqueChars(unittest.TestCase):\n",
      "\n",
      "    def test_unique_chars(self, func):\n",
      "        assert_equal(func(None), False)\n",
      "        assert_equal(func(''), True)\n",
      "        assert_equal(func('foo'), False)\n",
keep keep keep keep replace keep keep keep keep keep
 #273: Remove nose dependency for arrays_strings/ (#274) 
arrays_strings/unique_chars/unique_chars_solution.ipynb