一、將日誌直接輸出到屏幕服務器
import logging logging.debug('This is debug message') logging.info('This is info message') logging.warning('This is warning message') # 默認狀況下,logging將日誌打印到屏幕,日誌級別爲WARNING; #output==================================== # WARNING:root:This is warning message
2.經過logging.basicConfig函數對日誌的輸出格式及方式作相關配置app
import logging logging.basicConfig(level=logging.DEBUG, format='%(asctime)s %(filename)s[line:%(lineno)d] %(levelname)s %(message)s', datefmt='%a, %d %b %Y %H:%M:%S', filename='myapp.log', filemode='w') logging.debug('This is debug message') logging.info('This is info message') logging.warning('This is warning message') #./myapp.log文件中內容爲: #Sun, 24 May 2009 21:48:54 demo2.py[line:11] DEBUG This is debug message #Sun, 24 May 2009 21:48:54 demo2.py[line:12] INFO This is info message #Sun, 24 May 2009 21:48:54 demo2.py[line:13] WARNING This is warning message
logging.basicConfig參數:socket
#logging.basicConfig函數各參數: filename: 指定日誌文件名 filemode: 和file函數意義相同,指定日誌文件的打開模式,'w'或'a' format: 指定輸出的格式和內容,format能夠輸出不少有用信息,如上例所示: %(levelno)s: 打印日誌級別的數值 %(levelname)s: 打印日誌級別名稱 %(pathname)s: 打印當前執行程序的路徑,其實就是sys.argv[0] %(filename)s: 打印當前執行程序名 %(funcName)s: 打印日誌的當前函數 %(lineno)d: 打印日誌的當前行號 %(asctime)s: 打印日誌的時間 %(thread)d: 打印線程ID %(threadName)s: 打印線程名稱 %(process)d: 打印進程ID %(message)s: 打印日誌信息 datefmt: 指定時間格式,同time.strftime() level: 設置日誌級別,默認爲logging.WARNING stream: 指定將日誌的輸出流,能夠指定輸出到sys.stderr,sys.stdout或者文件,默認輸出到sys.stderr,當stream和filename同時指定時,stream被忽略
三、將日誌同時輸出到多個Handleride
先定義一個住handler,並使用addHander()添加到主handler,實現日誌輸出到多個handler.函數
a、同時輸出到文件和屏幕spa
import logging #設置一個basicConfig只能輸出到一個Handler logging.basicConfig(level=logging.DEBUG, format='%(asctime)s %(filename)s[line:%(lineno)d] %(levelname)s %(message)s', datefmt='%a, %d %b %Y %H:%M:%S', filename='myapp.log', filemode='w') #定義一個StreamHandler,將INFO級別或更高的日誌信息打印到標準錯誤,並將其添加到當前的日誌處理對象# console = logging.StreamHandler() console.setLevel(logging.INFO) formatter = logging.Formatter('%(name)-12s: %(levelname)-8s %(message)s') console.setFormatter(formatter) logging.getLogger('').addHandler(console) #輸出到文件的log級別爲debug,輸出到stream的log級別爲info logging.debug('This is debug message') logging.info('This is info message') logging.warning('This is warning message')
b、添加一個handler:輸出到文件,並根據文件大小滾動存儲線程
在a的基礎上添加一個handlerdebug
from logging.handlers import RotatingFileHandler #定義一個RotatingFileHandler,最多備份5個日誌文件,每一個日誌文件最大10M Rthandler = RotatingFileHandler('myapp.log', maxBytes=10*1024*1024,backupCount=5) Rthandler.setLevel(logging.INFO) formatter = logging.Formatter('%(name)-12s: %(levelname)-8s %(message)s') Rthandler.setFormatter(formatter) logging.getLogger('').addHandler(Rthandler)
logging幾種Handler類型:日誌
logging.StreamHandler(默認): 日誌輸出到流,能夠是sys.stderr、sys.stdout或者文件 logging.FileHandler: 日誌輸出到文件 logging.handlers.RotatingFileHandler 日誌輸出到文件,基於文件大小滾動存儲日誌 logging.handlers.TimedRotatingFileHandler 日誌輸出到文件,基於時間週期滾動存儲日誌 logging.handlers.SocketHandler: 遠程輸出日誌到TCP/IP sockets logging.handlers.DatagramHandler: 遠程輸出日誌到UDP sockets logging.handlers.SMTPHandler: 遠程輸出日誌到郵件地址 logging.handlers.SysLogHandler: 日誌輸出到syslog logging.handlers.NTEventLogHandler: 遠程輸出日誌到Windows NT/2000/XP的事件日誌 logging.handlers.MemoryHandler: 日誌輸出到內存中的制定buffer logging.handlers.HTTPHandler: 經過"GET"或"POST"遠程輸出到HTTP服務器
四、經過配置文件配置loggercode
a、定義配置文件logger.conf
#logger.conf ############################################### [loggers] keys=root,example01,example02 [logger_root] level=DEBUG handlers=hand01,hand02 [logger_example01] handlers=hand01,hand02 qualname=example01 propagate=0 [logger_example02] handlers=hand01,hand03 qualname=example02 propagate=0 ############################################### [handlers] keys=hand01,hand02,hand03 [handler_hand01] class=StreamHandler level=INFO formatter=form02 args=(sys.stderr,) [handler_hand02] class=FileHandler level=DEBUG formatter=form01 args=('myapp.log', 'a') [handler_hand03] class=handlers.RotatingFileHandler level=INFO formatter=form02 args=('myapp.log', 'a', 10*1024*1024, 5) ############################################### [formatters] keys=form01,form02 [formatter_form01] format=%(asctime)s %(filename)s[line:%(lineno)d] %(levelname)s %(message)s datefmt=%a, %d %b %Y %H:%M:%S [formatter_form02] format=%(name)-12s: %(levelname)-8s %(message)s datefmt=
b、logging.config獲取配置
import logging import logging.config logging.config.fileConfig("logger.conf") logger = logging.getLogger("example01") logger.debug('This is debug message') logger.info('This is info message') logger.warning('This is warning message')
import logging import logging.config logging.config.fileConfig("logger.conf") logger = logging.getLogger("example02") logger.debug('This is debug message') logger.info('This is info message') logger.warning('This is warning message')