Update app.py

app.py

@@ -339,7 +339,7 @@ def get_checkout_bubble(checkout_list: list):
     checkout_total = 0.0
     checkout_contents = []
     checkout_items = {key: value for key, value in message_list.items() if not value.get("quoted_msg_id")}
-    for _, value in checkout_items.items:
+    for _, value in checkout_items.items():
         msg_text = value.get("msg_text")
         amount = round(float(value.get("amount")), 2)
         checkout_total += amount