Second try

module3/exo1/influenza-like-illness-analysis.ipynb

@@ -198,6 +198,7 @@
    ],
    "source": [
     "import urllib.request\n",
+    "import os\n",
     "local_filename = \"local_data.csv\"\n",
     "\n",
     "if not os.path.exists(local_filename):\n",