diff --git a/module3/exo1/analyse-syndrome-grippal.ipynb b/module3/exo1/analyse-syndrome-grippal.ipynb
index e9115f60426a3248e551501543955f70a7dd7ddc..bb8971bfd948f4981effa6a160c7d415344a225e 100644
--- a/module3/exo1/analyse-syndrome-grippal.ipynb
+++ b/module3/exo1/analyse-syndrome-grippal.ipynb
@@ -37,6 +37,27 @@
     "data_url = \"http://www.sentiweb.fr/datasets/incidence-PAY-3.csv\""
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "création du fichier csv local avec vérification que celui ci n'existe pas déjà "
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "data_file = \"syndrome-grippal.csv\"\n",
+    "\n",
+    "import os\n",
+    "import urllib.request\n",
+    "if not os.path.exists(data_file):\n",
+    "    urllib.request.urlretrieve(data_url, data_file)"
+   ]
+  },
   {
    "cell_type": "markdown",
    "metadata": {},
@@ -59,20 +80,6 @@
     "La première ligne du fichier CSV est un commentaire, que nous ignorons en précisant `skiprows=1`."
    ]
   },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "data_file = \"syndrome-grippal.csv\"\n",
-    "\n",
-    "import os\n",
-    "import urllib.request\n",
-    "if not os.path.exists(data_file):\n",
-    "    urllib.request.urlretrieve(data_url, data_file)"
-   ]
-  },
   {
    "cell_type": "code",
    "execution_count": null,