diff --git a/module3/exo2/exercice_python_fr.org b/module3/exo2/exercice_python_fr.org
index 8690d0f11df99127cea936f2080929a16cebf013..59d691738fef66ac777c880af3dc1a793bae65c0 100644
--- a/module3/exo2/exercice_python_fr.org
+++ b/module3/exo2/exercice_python_fr.org
@@ -46,6 +46,39 @@ table[:5]
 | 202014 |         7 | 3879 |   2227 |  5531 |      6 |         3 |        9 | FR       | France  |
 | 202013 |         7 | 7326 |   5236 |  9416 |     11 |         8 |       14 | FR       | France  |
 
-Ok à première vue. Vérifions l'intégrité du jeu de données (lignes
-manquantes ou entrées erronnées).
+** Extraction des colonnes utilisées
+
+#+begin_src python :results output :session :exports both
+week = [row[0] for row in table]
+assert week[0] == 'week'
+del week[0]
+inc = [row[2] for row in table]
+assert inc[0] == 'inc'
+del inc[0]
+data = list(zip(week, inc))
+#+end_src
+
+#+RESULTS:
+
+Vérification visuelle des premières et dernières lignes.
+#+begin_src python :results value :session :exports both
+[('week', 'inc'), None] + data[:5] + [None] + data[-5:]
+#+end_src
+
+#+RESULTS:
+|   week |   inc |
+|--------+-------|
+| 202016 |   803 |
+| 202015 |  1918 |
+| 202014 |  3879 |
+| 202013 |  7326 |
+| 202012 |  8123 |
+|--------+-------|
+| 199101 | 15565 |
+| 199052 | 19375 |
+| 199051 | 19080 |
+| 199050 | 11079 |
+| 199049 |  1143 |
+
+** Conversion des dates