Update week3.ipynb

Author: lzhanggit

week3.ipynb

@@ -9,7 +9,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 63,
+   "execution_count": 60,
    "metadata": {},
    "outputs": [
     {
@@ -18,7 +18,7 @@
        "(8, 'resberry')"
       ]
      },
-     "execution_count": 63,
+     "execution_count": 60,
      "metadata": {},
      "output_type": "execute_result"
     }