Update app.py

app.py

@@ -11,7 +11,6 @@ LINE_CHANNEL_ACCESS_TOKEN = os.environ.get("LINE_CHANNEL_ACCESS_TOKEN")
 message_list = {}
 
 
-
 @app.route('/', methods=['GET'])
 def index():
     return {}, 200
@@ -331,6 +330,8 @@ def get_checkout_bubble(checkout_list: list):
     current_pay_to_contents = []
     carousel_contents = []
 
+    checkout_list.append({"from": None, "to": None, "amount": 0})
+
     for item in checkout_list:
 
         if current_user != item.get("from"):