如何设置扭曲的日志记录级别？

我正在使用带有twisted的autobahn包，它会在每次连接到websocket时显示调试消息。我尝试将日志记录级别切换为信息但没有成功：

import logging
logging.basicConfig(level=logging.INFO)

有没有简单的方法来切换日志级别？

Updated.

这是twisted_service.py：

from twisted.application import service
from twisted.logger import Logger
import logging
logging.basicConfig(level=logging.INFO)


class WebsocketService(service.Service):
    log = Logger()

    def startService(self):
        service.Service.startService(self)
        self.log.debug('start service')

application = service.Application("ws")

ws_service = WebsocketService()
ws_service.setServiceParent(application)

我使用twistd脚本运行它：twind-noy twins_service.py我收到一条消息：

2018-03-03T10:45:22+0500 [builtin.WebsocketService#debug]启动服务

logging.basicConfig 没有帮助。

我找到了解决方案：

import sys
from twisted.application import service
from twisted.logger import LogLevelFilterPredicate, LogLevel
from twisted.logger import textFileLogObserver, FilteringLogObserver


class WebsocketService(service.Service):
    log = Logger()

    def startService(self):
        service.Service.startService(self)
        self.log.debug('start service')

application = service.Application("ws")

ws_service = WebsocketService()
ws_service.setServiceParent(application)

info_predicate = LogLevelFilterPredicate(LogLevel.info)
log_observer = FilteringLogObserver(textFileLogObserver(sys.stdout), predicates=info_predicate)

application.setComponent(ILogObserver, log_observer)