Update multi_agent.py

multi_agent.py

@@ -134,8 +134,10 @@ def run_multi_agent(llm):
     #json_data = json.loads(chat_history.replace("'", '"'))
     
     #content_list = [item['content'] for item in json_data]
+
+    result = ""
     
     for move in chat_history:
         result += f"{move.get('role')}: {move.get('content')}\n"
        
-    return chat_history
+    return result