最后举个例子吧：
# encoding:utf-8 #import logging #FORMAT = '%(asctime)-15s %(clientip)s %(user)-8s %(message)s' #logging.basicConfig(format=FORMAT) #d = {'clientip': '192.168.0.1', 'user': 'fbloggs'} #logger = logging.getLogger('tcpserver') #logger.warning('Protocol problem: %s', 'connection reset', extra=d) #FORMAT = '%(asctime)-15s %(message)s' #logging.basicConfig(filename = "C:\\Users\\june\\Desktop\\1.txt", level = logging.DEBUG, filemode = "a", format=FORMAT) #logging.debug('this is a message') #logging.debug('test') #import logging #import datetime # #curDate = datetime.date.today() - datetime.timedelta(days=0) #logName = 'C:\\Users\\june\\Desktop\\error_%s.log' %curDate # #logging.basicConfig(level=logging.INFO, # format='%(asctime)s %(filename)s[line:%(lineno)d] %(levelname)s %(message)s', # #datefmt='%a, %d %b %Y %H:%M:%S', # filename=logName, # filemode='a') # ##2013-10-21 03:25:51,509 writeLog.py[line:14] INFO This is info message ##2013-10-21 03:25:51,510 writeLog.py[line:15] WARNING This is warning message #logging.debug('This is debug message') #logging.info('This is info message') #logging.warning('This is warning message')import logging import logging.config logging.config.fileConfig("logging.conf") #create logger loggerInfo = logging.getLogger("infoLogger") #"application" code loggerInfo.debug("debug message") loggerInfo.info("info message") loggerInfo.warn("warn message") loggerInfo.error("error message") loggerInfo.critical("critical message") loggerError = logging.getLogger("errorLogger") loggerError.error("Error: Hello world!")# 定义logger模块，root是父类，必需存在的，其它的是自定义。 # logging.getLogger(NAME)便相当于向logging模块注册了一种日志打印 # name 中用 . 表示 log 的继承关系 [loggers] keys=root,infoLogger,errorLogger # 定义handler [handlers] keys=infoHandler,errorHandler # 定义格式化输出 [formatters] keys=infoFmt,errorFmt #-------------------------------------------------- # 实现上面定义的logger模块，必需是[logger_xxxx]这样的形式 #-------------------------------------------------- # [logger_xxxx] logger_模块名称 # level 级别，级别有DEBUG、INFO、WARNING、ERROR、CRITICAL # handlers 处理类，可以有多个，用逗号分开 # qualname logger名称，应用程序通过 logging.getLogger获取。对于不能获取的名称，则记录到root模块。 # propagate 是否继承父类的log信息，0:否 1:是 [logger_root] level=INFO handlers=errorHandler [logger_errorLogger] level=ERROR handlers=errorHandler propagate=0 qualname=errorLogger [logger_infoLogger] level=INFO handlers=infoHandler propagate=0 qualname=infoLogger #-------------------------------------------------- # handler #-------------------------------------------------- # [handler_xxxx] # class handler类名 # level 日志级别 # formatter，上面定义的formatter # args handler初始化函数参数 [handler_infoHandler] class=StreamHandler level=INFO formatter=infoFmt args=(sys.stdout,) [handler_errorHandler] class=logging.handlers.TimedRotatingFileHandler level=ERROR formatter=errorFmt # When computing the next rollover time for the first time (when the handler is created), # the last modification time of an existing log file, or else the current time, # is used to compute when the next rotation will occur. # 这个功能太鸡肋了，是从handler被创建的时间算起，不能按自然时间 rotation 切分，除非程序一直运行，否则这个功能会有问题 # 临时解决方案参考下面的链接：Python 多进程日志记录 # ?f=wb2 args=('C:\\Users\\june\\Desktop\\error.log', 'M', 1, 5) #-------------------------------------------------- # 日志格式 #-------------------------------------------------- # %(asctime)s 年-月-日 时-分-秒,毫秒 2013-04-26 20:10:43,745 # %(filename)s 文件名，不含目录 # %(pathname)s 目录名，完整路径 # %(funcName)s 函数名 # %(levelname)s 级别名 # %(lineno)d 行号 # %(module)s 模块名 # %(message)s 消息体 # %(name)s 日志模块名 # %(process)d 进程id # %(processName)s 进程名 # %(thread)d 线程id # %(threadName)s 线程名 [formatter_infoFmt] format=%(asctime)s %(levelname)s %(message)s datefmt= class=logging.Formatter [formatter_errorFmt] format=%(asctime)s %(levelname)s %(message)s datefmt= class=logging.Formatter #coding=utf-8 import logging import datetime format='%(asctime)s - %(filename)s - [line:%(lineno)d] - %(levelname)s - %(message)s' curDate = datetime.date.today() - datetime.timedelta(days=0) infoLogName = r'C:/Users/june/Desktop/info_%s.log' %curDate errorLogName = r'C:/Users/june/Desktop/error_%s.log' %curDate formatter = logging.Formatter(format) infoLogger = logging.getLogger("infoLog") errorLogger = logging.getLogger("errorLog") infoLogger.setLevel(logging.INFO) errorLogger.setLevel(logging.ERROR) infoHandler = logging.FileHandler(infoLogName, 'a') infoHandler.setLevel(logging.INFO) infoHandler.setFormatter(formatter) errorHandler = logging.FileHandler(errorLogName, 'a') errorHandler.setLevel(logging.ERROR) errorHandler.setFormatter(formatter) testHandler = logging.StreamHandler() testHandler.setFormatter(formatter) testHandler.setLevel(logging.ERROR) infoLogger.addHandler(infoHandler) infoLogger.addHandler(testHandler) errorLogger.addHandler(errorHandler) #infoLogger.debug("debug message") #infoLogger.info("info message") #infoLogger.warn("warn message") # # 下面这行会同时打印在文件和终端上 #infoLogger.error("error message") # #errorLogger.error("error message") #errorLogger.critical("critical message")