io操作,不要太頻繁
log的作用
日誌資訊
成熟的第三方日誌
初始化/寫日誌例項需要制定級別,只有級別等於或者高於制定級別時才被記錄
使用方式
import logging
logging.debug(
'this is a debug log.'
)logging.info(
'this is a info log.'
)logging.warning(
'this is a warning log.'
)logging.error(
'this is a error log.'
)logging.critical(
'this is a caitical log.'
)#另一種寫法
logging.log(logging.debug,
"this is a debug log."
)logging.log(logging.info,
"this is a info log."
)logging.log(logging.warning,
"this is a warning log."
)logging.log(logging.error,
"this is a error log."
)logging.log(logging.critical,
"this is a caitical log."
)
import logging
logging.basicconfig(filename=
'日誌檔案'
,level=logging.debug)
logging.debug(
'this is a debug log.'
)logging.info(
'this is a info log.'
)logging.warning(
'this is a warning log.'
)logging.error(
'this is a error log.'
)logging.critical(
'this is a caitical log.'
)#另一種寫法
logging.log(logging.debug,
"this is a debug log."
)logging.log(logging.info,
"this is a info log."
)logging.log(logging.warning,
"this is a warning log."
)logging.log(logging.error,
"this is a error log."
)logging.log(logging.critical,
"this is a caitical log."
)
import logging
log_format =
'%(asctime)s----%(levelname)s----%(message)s'
logging.basicconfig(filename=
'日誌檔案'
,level=logging.debug,
format
=log_format)
logging.debug(
'this is a debug log.'
)logging.info(
'this is a info log.'
)logging.warning(
'this is a warning log.'
)logging.error(
'this is a error log.'
)logging.critical(
'this is a caitical log.'
)#另一種寫法
logging.log(logging.debug,
"this is a debug log."
)logging.log(logging.info,
"this is a info log."
)logging.log(logging.warning,
"this is a warning log."
)logging.log(logging.error,
"this is a error log."
)logging.log(logging.critical,
"this is a caitical log."
)
asctime %
(asctime)s
created %(created)f
relativecreated %
(relativecreated)d
levelname %(levelname)s
msecs %
(msecs)d
levelno %
(levelno)s
name %(name)s
message %
(message)s
pathname %
(pathname)s
filename %(filename)s
module %
(module)s
lineno %
(lineno)d
funcname %
(funcname)s
process %
(process)d
processname %
(processname)s
thread %
(thread)d
threadname %
(threadname)s
logger
handler
format類
fitler類
#需求
#1、要求將所有級別的的所有日誌都寫入磁碟檔案
#2、all.log檔案記錄所有的日誌資訊,日誌格式為:日期和時間 - 日誌級別 - 日誌資訊
#3、error.log檔案中單獨記錄error及以上級別的日誌資訊,日誌格式:日期和時間 - 日誌級別 - 檔名[:行號] - 日誌資訊
#4、要求all.log在每天凌晨進行日誌切割
#分析#1、要記錄所有的級別的日誌,因此日誌器的而有效level需要設定為最低級別--dubeg
#2、日誌需要被傳送到兩個不同的目的地,因此需要為日誌設定兩個handler;另外,兩個目的地都是磁碟檔案,因此這兩個handler都是與filehandler
#3、all.log要求按照時間進行日誌切割,因此需要使用logging.handlers.timedrotatingfilehandler;而error.log沒有要求日誌切割
#4、兩個日誌檔案的格式不同,因此需要對這兩個handler分別設定格式器
import logging
import logging.handlers
import datetime
#定義loggerlogger = logging.getlogger(
'mylogger'
)logger.setlevel(logging.debug)
rf_handler = logging.handlers.timedrotatingfilehandler(
'all.log'
,when=
'midnight'
,interval=
1,backupcount=
7,attime=
none
)rf_handler.setformatter(logging.formatter(
'%(asctima)s - %(levelname)s - %(message)s'))
f_handler = logging.filehandler(
'error.log'
)f_handler.setlevel(logging.error)
f_handler.setformatter(logging.formatter(
'%(asctima)s - %(levelname)s - %(filename)s[:(loneno)d] - %(message)s'))
logger.addhandler(rf_handler)
logger.addhandler(f_handler)
logger.debug(
'debug message'
)logger.info(
'info message'
)logger.warning(
'warning message'
)logger.error(
'error message'
)logger.critical(
'critical message'
)
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