如果我使用logger = logging.getLogger(“Name”)创建一个logger对象,我无法将filemode从append(‘a’)更改为write(‘w’).我可以使用带有basicConfig的root记录器,但是当我想要的是从DEBUG级别开始的我自己的消息时,我会记录很多系统调试消息.
我希望(1)将我自己的记录器对象的filemode更改为’w’
或(2)向根记录器添加过滤器.甚至可以从根记录器中过滤掉这些调试消息吗？
def create_log():
# create logger for "Sample App"
# create logger for "Sample App"
logger = logging.getLogger('automated_testing')
logger.setLevel(logging.DEBUG)
# create file handler which logs even debug messages
fh = logging.FileHandler('results.log')
fh.setLevel(logging.DEBUG)
# create console handler with a higher log level
ch = logging.StreamHandler(stream=sys.stdout)
ch.setLevel(logging.DEBUG)
# create formatter and add it to the handlers
formatter = logging.Formatter('[%(asctime)s] %(levelname)8s --- %(message)s ' +
'(%(filename)s:%(lineno)s)',datefmt='%Y-%m-%d %H:%M:%S')
fh.setFormatter(formatter)
ch.setFormatter(formatter)
# add the handlers to the logger
logger.addHandler(ch)
logger.addHandler(fh)
return logger
解决方法
就像是：
import sys
import logging
def create_logger():
# create logger for "Sample App"
logger = logging.getLogger('automated_testing')
logger.setLevel(logging.DEBUG)
# create file handler which logs even debug messages
fh = logging.FileHandler('results.log',mode='w')
fh.setLevel(logging.DEBUG)
# create console handler with a higher log level
ch = logging.StreamHandler(stream=sys.stdout)
ch.setLevel(logging.INFO)
# create formatter and add it to the handlers
formatter = logging.Formatter('[%(asctime)s] %(levelname)8s --- %(message)s ' +
'(%(filename)s:%(lineno)s)',datefmt='%Y-%m-%d %H:%M:%S')
fh.setFormatter(formatter)
ch.setFormatter(formatter)
# add the handlers to the logger
logger.addHandler(ch)
logger.addHandler(fh)
return logger
logger = create_logger()
logger.log(logging.NOTSET,"NOTSET Message - 0")
logger.log(logging.DEBUG,"DEBUG Message - 10")
logger.log(logging.INFO,"INFO Message - 20")
logger.log(logging.WARNING,"WARNING Message - 30")
logger.log(logging.CRITICAL,"CRITICAL Message - 40")
打印到stdout：
[2015-03-16 17:51:08] INFO --- INFO Message - 20 (temp3.py:34) [2015-03-16 17:51:08] WARNING --- WARNING Message - 30 (temp3.py:35) [2015-03-16 17:51:08] CRITICAL --- CRITICAL Message - 40 (temp3.py:36)
写入(不附加)到results.log：
[2015-03-16 17:51:08] DEBUG --- DEBUG Message - 10 (temp3.py:33) [2015-03-16 17:51:08] INFO --- INFO Message - 20 (temp3.py:34) [2015-03-16 17:51:08] WARNING --- WARNING Message - 30 (temp3.py:35) [2015-03-16 17:51:08] CRITICAL --- CRITICAL Message - 40 (temp3.py:36)
DEBUG记录在results.txt中,而只有INFO被发送到stdout.
请注意,NOTSET日志条目随后会传递给根记录器,因为您在根记录器上没有任何处理程序,因此被丢弃.