Update app.py

app.py

@@ -112,7 +112,7 @@ def predict(message, chat_history, system_msg, temperature, top_p, repetition_pe
     # 流式处理
     for chunk in response.iter_lines():
         if chunk:
-            chunk_str = chunk.decode("utf-8").:
+            chunk_str = chunk.decode("utf-8").replace("data: ", "")
                 chunk_data = json.loads(chunk_str)
                 if "choices" in chunk_data:
                     delta = chunk_data["choices"][0].get("delta", {})