update:加了一点注释

main.py

@@ -172,7 +172,7 @@ async def streaming_chat(ws: WebSocket,db=Depends(get_db)):
     await ws.accept()
     logger.debug("WebSocket连接成功")
     try:
-        agent = Agent(asr_type=Config.ASR, llm_type=Config.LLM, tts_type=Config.TTS)
+        agent = None
         assistant = None
         asr_results = []
         llm_text = ""
@@ -182,6 +182,8 @@ async def streaming_chat(ws: WebSocket,db=Depends(get_db)):
             if assistant is None:
                 assistant = db.query(Assistant).filter(Assistant.id == chunk['meta_info']['session_id']).first()
                 agent.init_recorder(assistant.user_id)
+            if not agent:
+                agent = Agent(asr_type=Config.ASR, llm_type=Config.LLM, tts_type=Config.TTS)
             chunk["audio"] = agent.user_audio_process(chunk["audio"], db)
             asr_results = await agent.stream_recognize(chunk, db)
         kid_text = asr_results[0]['text'] #asr结果的[0]默认为孩子(主要用户)的asr结果