Update main.py

main.py

@@ -113,7 +113,8 @@ def get_previous_message(user_id):
         return user_message_history[user_id][-1]
     return None
     
-
+# 建立 chat_sessions 字典
+chat_sessions = {}
 @line_handler.add(MessageEvent, message=(ImageMessage,TextMessage))
 def handle_image_message(event):
     user_id = event.source.user_id