diff --git a/ProgrammingAssignment_1/model.ipynb b/ProgrammingAssignment_1/model.ipynb
index dcfb2390ae89af6cf83559eca7671c93fe940147..48316f283e18f40d6072589ecfccf3f3654d5cb2 100644
--- a/ProgrammingAssignment_1/model.ipynb
+++ b/ProgrammingAssignment_1/model.ipynb
@@ -123,12 +123,12 @@
     "        dist: float\n",
     "    '''\n",
     "if metric == 'Euclidean':\n",
-        "raise NotImplementedError",
+    "   raise NotImplementedError",
     "elif metric == 'Manhattan':\n",
-        "raise NotImplementedError\n",
+    "   raise NotImplementedError\n",
     "else:\n",
-        "raise ValueError('{} is not a valid metric.'.format(metric))\n",
-    "    return dist # scalar distance btw x and y"
+    "   raise ValueError('{} is not a valid metric.'.format(metric))\n",
+    "   return dist # scalar distance btw x and y"
    ]
   },
   {