INFO:     Started server process [41152]
INFO:     Waiting for application startup.
INFO:     Application startup complete.
ERROR:    [Errno 10048] error while attempting to bind on address ('127.0.0.1', 8766): 通常每个套接字地址(协议/网络地址/端口)只允许使用一次。
INFO:     Waiting for application shutdown.
INFO:     Application shutdown complete.