diff --git a/module2/exo1/toy_notebook_fr.ipynb b/module2/exo1/toy_notebook_fr.ipynb
index 0bbbe371b01e359e381e43239412d77bf53fb1fb..e9dd4bf9bc661e0507bbe65a4c089f5b1de8f64d 100644
--- a/module2/exo1/toy_notebook_fr.ipynb
+++ b/module2/exo1/toy_notebook_fr.ipynb
@@ -1,5 +1,86 @@
 {
- "cells": [],
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Un nouveau document, base sur mes calculs en *line tracing*"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Introduction\n",
+    "Je commence déjà par charger les bibliothèques nécessaires. Je définis également un certain nombre de fonction qui seront utiles pour la suite des calculs et des rendus."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import numpy as np\n",
+    "import matplotlib.pyplot as plt\n",
+    "import sys\n",
+    "import os\n",
+    "\n",
+    "pi = np.pi"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 5,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def centrifugal_lat(r,t,p):\n",
+    "    # ----------------------------------------------\n",
+    "    # Centrifugal latitude in Jovian magnetosphere\n",
+    "    # coefficient from Phipps & Bagenal (2021)\n",
+    "    #\n",
+    "    # Input : \n",
+    "    #   R [Rj]\n",
+    "    #   theta (colatitude) [°]\n",
+    "    #   phi (longitude in S3RH) [°]\n",
+    "    # ----------------------------------------------\n",
+    "    a = 1.66 # [°]\n",
+    "    b = 0.131 # \n",
+    "    c = 1.62\n",
+    "    d = 7.76 # [°]\n",
+    "    e = 249 # [°]\n",
+    "    cent_eq = (a*np.tanh(b*r-c)+d) * (np.sin(np.radians(p-e)))\n",
+    "    \n",
+    "    jov_lat = 90 - t\n",
+    "    cent_lat = jov_lat - cent_eq\n",
+    "    \n",
+    "    return cent_lat\n",
+    "\n",
+    "def extractfilelines(filename: str, titlemarker=\"#\"):\n",
+    "    # -----------------------------------------------\n",
+    "    # This function converts a text file (at location specified by filename)\n",
+    "    # into a list of its lines in text format\n",
+    "    # -----------------------------------------------\n",
+    "    with open(filename, \"r\") as f:\n",
+    "        # read title\n",
+    "        line = f.readline()\n",
+    "        while line.startswith(titlemarker):\n",
+    "            line = f.readline()\n",
+    "\n",
+    "        lines = [line] + f.readlines()\n",
+    "\n",
+    "    return lines"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  }
+ ],
  "metadata": {
   "kernelspec": {
    "display_name": "Python 3",
@@ -16,10 +97,9 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.6.3"
+   "version": "3.6.4"
   }
  },
  "nbformat": 4,
  "nbformat_minor": 2
 }
-