add

app.py

@@ -247,8 +247,11 @@ plt.close()
         except SyntaxError as e:
             return JSONResponse(content={"error": f"Erreur de syntaxe détectée : {e}\nCode généré :\n{generated_code}"}, status_code=422)
 
-        exec_env = {"df": df, "plt": plt, "sns": sns, "pd": pd}
-        exec(generated_code, exec_env)
+        exec_env = {
+    "__builtins__": __builtins__,
+    "df": df,
+}
+exec(generated_code, exec_env)
 
         img_path = "plot.png"
         if not os.path.exists(img_path):