      "from nose.tools import assert_equal\n",
      "\n",
      "class UnitTest (object):\n",
      "    def testReverseWords(self):\n",
      "            assert_equal(reverse_words('the sun is hot'), 'eht nus si toh')\n",
      "            assert_equal(reverse_words(''), None)\n",
      "            assert_equal(reverse_words('123 456 789'), '321 654 987')\n",
      "            assert_equal(reverse_words('magic'), 'cigam')\n",
      "            print('Success: reverse_words')\n",
      "            \n",
      "def main():\n",
      "    test = UnitTest()\n",
      "    test.testReverseWords()\n",
 
</s> remove     "    test.testReverseWords()\n",
 </s> add     "    test.testReverseWords(reverse_words)\n", </s> remove    "metadata": {
    "collapsed": false
   },
 </s> add    "metadata": {}, </s> remove     "    pass "
 </s> add     "    pass" </s> remove    "metadata": {
    "collapsed": false
   },
 </s> add    "metadata": {}, </s> remove     "version": 2
 </s> add     "version": 2.0
    "            assert_equal(func('the sun is hot'), 'eht nus si toh')\n",
    "            assert_equal(func(''), None)\n",
    "            assert_equal(func('123 456 789'), '321 654 987')\n",
    "            assert_equal(func('magic'), 'cigam')\n",
      "from nose.tools import assert_equal\n",
      "\n",
      "class UnitTest (object):\n",
      "    def testReverseWords(self):\n",
    "            assert_equal(func('the sun is hot'), 'eht nus si toh')\n",
    "            assert_equal(func(''), None)\n",
    "            assert_equal(func('123 456 789'), '321 654 987')\n",
    "            assert_equal(func('magic'), 'cigam')\n",
    "            assert_equal(func('the sun is hot'), 'eht nus si toh')\n",
    "            assert_equal(func(''), None)\n",
    "            assert_equal(func('123 456 789'), '321 654 987')\n",
    "            assert_equal(func('magic'), 'cigam')\n",
    "            assert_equal(func('the sun is hot'), 'eht nus si toh')\n",
    "            assert_equal(func(''), None)\n",
    "            assert_equal(func('123 456 789'), '321 654 987')\n",
    "            assert_equal(func('magic'), 'cigam')\n",
    "            assert_equal(func('the sun is hot'), 'eht nus si toh')\n",
    "            assert_equal(func(''), None)\n",
    "            assert_equal(func('123 456 789'), '321 654 987')\n",
    "            assert_equal(func('magic'), 'cigam')\n",
      "            print('Success: reverse_words')\n",
      "            \n",
      "def main():\n",
      "    test = UnitTest()\n",
      "    test.testReverseWords()\n",
keep keep keep keep replace replace replace replace keep keep keep keep keep
 Updated Unit Test to include function call (reverse_words) in testReverseWords 
staging/arrays_strings/reverse_words/reverse_words_challenge.ipynb