Update app.py

app.py

@@ -20,11 +20,21 @@ class BasicAgent:
     def __call__(self, question: str) -> str:
         print(f"Agent received question (first 50 chars): {question[:50]}...")
         messages = [{"role": "system", "content": sys_prompt},{"role": "user", "content": question}]
-        response = self.agent.run(messages)
-        answer = response['messages'][-1].content
-        if isinstance(answer, list):
-            answer = answer[0] if answer else ''  # 提取第一个元素或返回空字符串
-            return answer.strip() if isinstance(answer, str) else str(answer).strip()
+       
+        try:
+            answer = self.agent.run(messages)
+            #answer = response['body'][-1].content
+            print(f"Answer type: {type(answer)}, value: {answer}")  
+            # 处理 answer 的类型
+            if isinstance(answer, list):
+                answer = answer[0].get('body', '') if answer else ''
+            elif not isinstance(answer, str):
+                answer = str(answer)  
+            return answer.strip()  
+        except Exception as e:
+            print(f"Error processing question: {e}")
+            return f"Error: {e}"  
+
 
 def run_and_submit_all( profile: gr.OAuthProfile | None):
     """