python logging添加filter教程
例子一
deffilter(self,record): """Ourcustomrecordfilteringlogic. Built-infilteringlogic(vialogging.Filter)istoolimiting. """ ifnotself.filters: returnTrue matched=False rname=record.name#shortcut fornameinself.filters: ifrname==nameorrname.startswith(name+'.'): matched=True returnmatched
例子二
def_create_log_handlers(stream):
"""Createandreturnadefaultlistoflogging.Handlerinstances.
FormatWARNINGmessagesandabovetodisplaythelogginglevel,and
messagesstrictlybelowWARNINGnottodisplayit.
Args:
stream:Seetheconfigure_logging()docstring.
"""
#Handleslogging.WARNINGandabove.
error_handler=logging.StreamHandler(stream)
error_handler.setLevel(logging.WARNING)
formatter=logging.Formatter("%(levelname)s:%(message)s")
error_handler.setFormatter(formatter)
#Createalogging.Filterinstancethatonlyacceptsmessages
#belowWARNING(i.e.filtersoutanythingWARNINGorabove).
non_error_filter=logging.Filter()
#Thefiltermethodacceptsalogging.LogRecordinstance.
non_error_filter.filter=lambdarecord:record.levelno
例子三
def_default_handlers(stream):
"""Returnalistofthedefaultlogginghandlerstouse.
Args:
stream:Seetheconfigure_logging()docstring.
"""
#Createthefilter.
defshould_log(record):
"""Returnwhetheralogging.LogRecordshouldbelogged."""
#FIXME:Enabletheloggingofautoinstallmessagesonce
#autoinstallisadjusted.Currently,autoinstalllogs
#INFOmessageswhenimportingalready-downloadedpackages,
#whichistooverbose.
ifrecord.name.startswith("webkitpy.thirdparty.autoinstall"):
returnFalse
returnTrue
logging_filter=logging.Filter()
logging_filter.filter=should_log
#Createthehandler.
handler=logging.StreamHandler(stream)
formatter=logging.Formatter("%(name)s:[%(levelname)s]%(message)s")
handler.setFormatter(formatter)
handler.addFilter(logging_filter)
return[handler]
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