diff --git a/python/afficher_graphe.py b/python/afficher_graphe.py
index 71733cf..f212b63 100644
--- a/python/afficher_graphe.py
+++ b/python/afficher_graphe.py
@@ -32,12 +32,12 @@ def export(graphe, oriente, fn, marques=None, distances=None, parents=None) :
         print(str(noeud) + '[label="' + label + '"];', file = f)
     for origine in range(0, taille(graphe)) : # énumérationd des arcs
         for arrivee in range(0, taille(graphe)) :
-            if (oriente or origine < arrivee) and arc(graphe, origine, arrivee) :
+            if (oriente or origine < arrivee) and graphe[origine][arrivee] is not None :
                 if parents != None and parents[arrivee] == origine or not oriente and parents[origine] == arrivee :
                     style = ", penwidth=2, color=red"
                 else :
                     style = ""
-                print(str(origine) + lien + str(arrivee) + '[label="' + str(poids(graphe, origine, arrivee)) + '"' + style + "];", file=f)
+                print(str(origine) + lien + str(arrivee) + '[label="' + str(graphe[origine][arrivee]) + '"' + style + "];", file=f)
     print("}", file=f)
     f.close()