Python记录器动态文件名 [英] Python logger dynamic filename

问题描述

我想以这样一种方式配置Python记录器，以便每个记录器实例都应登录一个名称与记录器本身名称相同的文件.

I want to configure my Python logger in such a way so that each instance of logger should log in a file having the same name as the name of the logger itself.

例如:

log_hm = logging.getLogger('healthmonitor')
log_hm.info("Testing Log") # Should log to /some/path/healthmonitor.log

log_sc = logging.getLogger('scripts')
log_sc.debug("Testing Scripts") # Should log to /some/path/scripts.log

log_cr = logging.getLogger('cron')
log_cr.info("Testing cron") # Should log to /some/path/cron.log

我想保持它的通用性，并且不想对我可以拥有的所有记录器名称进行硬编码.有可能吗?

I want to keep it generic and dont want to hardcode all kind of logger names I can have. Is that possible?

推荐答案

import os
import logging

class MyFileHandler(object):

    def __init__(self, dir, logger, handlerFactory, **kw):
        kw['filename'] = os.path.join(dir, logger.name)
        self._handler = handlerFactory(**kw)

    def __getattr__(self, n):
        if hasattr(self._handler, n):
            return getattr(self._handler, n)
        raise AttributeError, n

logger = logging.getLogger('test')
logger.setLevel(logging.INFO)
handler = MyFileHandler(os.curdir, logger, logging.FileHandler)
logger.addHandler(handler)
logger.info('hello mylogger')

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