{"error": "Traceback (most recent call last):\n File \"./utils/shortcuts.py\", line 181, in wrapper\n response = func(request, *args, **kwargs)\n File \"./shop/views_ajax.py\", line 83, in del_article\n (total_price, total_count) = total_chopcart_price(profile, sess, org)\n File \"./shop/views_ajax.py\", line 144, in total_chopcart_price\n total_price += item.ordered_num * item.eshop_price\nTypeError: unsupported operand type(s) for *: 'NoneType' and 'NoneType'\n"}