我想记录特定记录器名称、特定级别及更高级别的消息(例如INFO
及以上)到特定的日志处理程序(例如文件处理程序),同时仍然将所有日志消息发送到控制台。 Python 的版本是 2.7。
到目前为止我尝试的是创建两个记录器:
对于根记录器,我附上了logging.StreamHandler
,并将日志级别设置为logging.DEBUG
.
然后我将一个处理程序附加到指定的记录器并将级别设置为logging.INFO
对于那个记录器。
当我现在调用使用命名记录器的模块时,我不明白DEBUG
日志不再传播到根记录器。
注意:extraLogger 有一个流处理器这里来演示一下这个问题。在我的生产代码中我会使用文件处理器
import logging
def do_logging(turn):
logger = logging.getLogger('extra')
logger.info('some info turn %d' % turn)
logger.debug('this is debug fudge turn %d' % turn)
rootLogger = logging.getLogger()
handler = logging.StreamHandler()
rootFormatter = logging.Formatter('root - %(levelname)s: %(msg)s')
handler.setFormatter(rootFormatter)
rootLogger.addHandler(handler)
rootLogger.setLevel(logging.DEBUG)
do_logging(1)
extraLogger = logging.getLogger('extra')
extraHandler = logging.StreamHandler()
extraFormatter = logging.Formatter('extra - %(levelname)s: %(msg)s')
extraHandler.setFormatter(extraFormatter)
extraLogger.addHandler(extraHandler)
extraLogger.setLevel(logging.INFO)
do_logging(2)
实际输出:
root - INFO: some info turn 1
root - DEBUG: this is debug fudge turn 1
extra - INFO: some info turn 2
root - INFO: some info turn 2
我想要的输出:
root - INFO: some info turn 1
root - DEBUG: this is debug fudge turn 1
extra - INFO: some info turn 2
root - INFO: some info turn 2
root - DEBUG: this is debug fudge turn 2
我怀疑有一个习俗Filter
在这种情况下会有帮助,但我不知道如何......
你可以使用罗伯特的级别过滤器 https://stackoverflow.com/a/7447596/190597像这样:
# Put the Filter on the Handler so only INFO and higher is handled
extraHandler.addFilter(LevelFilter(logging.INFO))
# Let the Logger process everything (so it can propagate records to root)
extraLogger.setLevel(logging.DEBUG)
import logging
class LevelFilter(logging.Filter):
"""
https://stackoverflow.com/a/7447596/190597 (robert)
"""
def __init__(self, level):
self.level = level
def filter(self, record):
return record.levelno >= self.level
def do_logging(turn):
logger = logging.getLogger('extra')
logger.info('some info turn %d' % turn)
logger.debug('this is debug fudge turn %d' % turn)
rootLogger = logging.getLogger()
handler = logging.StreamHandler()
rootFormatter = logging.Formatter('root - %(levelname)s: %(msg)s')
handler.setFormatter(rootFormatter)
rootLogger.addHandler(handler)
rootLogger.setLevel(logging.DEBUG)
do_logging(1)
extraLogger = logging.getLogger('extra')
extraHandler = logging.StreamHandler()
extraFormatter = logging.Formatter('extra - %(levelname)s: %(msg)s')
extraHandler.setFormatter(extraFormatter)
extraLogger.addHandler(extraHandler)
# Put the Filter on the Handler so only INFO and higher is handled
extraHandler.addFilter(LevelFilter(logging.INFO))
# Handle everything (so it can propagate to root)
extraLogger.setLevel(logging.DEBUG)
do_logging(2)
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