     "source": [
      "def reverse_words(S):\n",
      "    if len(S) is 0:\n",
      "        return None\n",
      "    \n",
      "    words = S.split()\n",
      "    for i in range (len(words)):\n",
      "        words[i] = words[i][::-1]\n",
      "        \n",
      "    return \" \".join(words)"
 
</s> remove     "        \n",
 </s> add     "\n", </s> remove    "execution_count": 2,
   "metadata": {
    "collapsed": false
   },
 </s> add    "execution_count": 1,
   "metadata": {}, </s> remove     "    test = UnitTest()\n",
 </s> add     "    test = TestReverseWords()\n", </s> remove     "            \n",
 </s> add     "\n",
    "\n", </s> remove     "            \n",
 </s> add     "\n",
    "\n",
    "\n",
     "source": [
      "def reverse_words(S):\n",
      "    if len(S) is 0:\n",
      "        return None\n",
    "\n",
      "    words = S.split()\n",
      "    for i in range (len(words)):\n",
      "        words[i] = words[i][::-1]\n",
      "        \n",
      "    return \" \".join(words)"
keep keep keep keep replace keep keep keep keep keep
 #273: Remove nose dependency for staging/ (#283) 
staging/arrays_strings/reverse_words/reverse_words_solution.ipynb