python响应websocket请求输出动态日志

处理线程中打开文件，每次读取一行并记录当前读取位置，没有下一行让出一秒
logfile = './logs/%s_%s.log' % (appName, time.strftime('%Y_%m_%d'))
    file = open(logfile, 'r', encoding='utf-8')
    while True:
        where = file.tell()
        line = file.readline()
        if not line:
            time.sleep(1)
            file.seek(where)
        else:
            send_data(conn, line.strip().encode('utf-8'))