Update app.py

app.py

@@ -197,7 +197,8 @@ def deepseek_respond(
         chat_history.append((message, assistant_message))
         yield chat_history
         for chunk in response:
-            delta = chunk.choices[0].delta.get("content", "")
+            # "content"가 None인 경우 빈 문자열로 처리하여 오류 방지
+            delta = chunk.choices[0].delta.get("content") or ""
             assistant_message += delta
             chat_history[-1] = (message, assistant_message)
             yield chat_history