twisted的log系统的级别level

首先你需要写一个log观察者类，然后给这观察者一个级别来过滤你想要的log 

import logging
from twisted.python import log

class LevelFileLogObserver(log.FileLogObserver):

def __init__(self, f, level=logging.INFO):
    log.FileLogObserver.__init__(self, f)
    self.logLevel = level

def emit(self, eventDict):
    if eventDict['isError']:
        level = logging.ERROR
    elif 'level' in eventDict:
        level = eventDict['level']
    else:
        level = logging.INFO
    if level >= self.logLevel:
        log.FileLogObserver.emit(self, eventDict)
'''then you have to register it:'''
from twisted.python import logfile

f = logfile.LogFile(“someFile.log”, '/some/path/', rotateLength=1000,maxRotatedFiles=100)
logger = LevelFileLogObserver(f, logging.DEBUG)
twisted.python.log.addObserver(logger.emit)

If you use twistd you can pass it through –logger option:

mylogger.py

import LevelFileLogObserver
from twisted.python import logfile

f = logfile.LogFile(“someFile.log”, '/some/path/', rotateLength=1000, maxRotatedFiles=100)
flobserver = LevelFileLogObserver(f)
observer = flobserver.emit

twistd invocation

twistd –logger=mylogger.observer 

Now you can use the new api you defined:

log.msg('the level of this message is INFO')
log.msg('the level of this message is INFO', level=logging.INFO)
log.msg('the level of this message is DEBUG', level=logging.DEBUG)
log.msg('the level of this message is ERROR', level=logging.ERROR)
log.msg('the level of this message is ERROR', level=logging.WARNING)
log.msg('the level of this message is ERROR', level=logging.CRITICAL)
log.err('the level of this message is ERROR')

级别共有五个，优先级关系是 '''level: DEBUG < INFO < WARNING < ERROR < CRITICAL'''，如果级别为CRITICAL 那么小于它的级别的错误都不会打印出来


原文链接