python 日誌模塊logging

logging模塊的四大組件

組件名稱	對應類名	功能描述
日誌器	Logger	提供了應用程序可一直使用的接口
處理器	Handler	將logger建立的日誌記錄發送到合適的目的輸出
過濾器	Filter	提供了更細粒度的控制工具來決定輸出哪條日誌記錄，丟棄哪條日誌記錄
格式器	Formatter	決定日誌記錄的最終輸出格式

 

import logging
from logging import handlers
logger = logging.getLogger() #先實例化一個logger對象，先建立一個辦公室

logger.setLevel(logging.DEBUG) #設置日誌的級別的人
cl = logging.StreamHandler() #負責往控制檯輸出的人
bl = handlers.TimedRotatingFileHandler(filename='a.log',when='S',interval=1,backupCount=5,encoding='utf-8')
# when，按什麼單位
#S 秒
# M 分
# H 小時、
# D 天、
# W 每星期（interval==0時表明星期一）

# midnight - roll over at midnight

# W{0-6} - roll over on a certain day; 0 - Monday

fmt = logging.Formatter('%(asctime)s - %(pathname)s[line:%(lineno)d] - %(levelname)s: %(message)s')
cl.setFormatter(fmt) #設置控制檯輸出的日誌格式
bl.setFormatter(fmt) #設置文件裏面寫入的日誌格式
logger.addHandler(cl) #把已經調教好的人放到辦公室裏
logger.addHandler(bl) ##把已經調教好的人放到辦公室裏
#指定日誌的格式
logger.debug('我是debug。。。')
logger.warning('我是waring。。。')

 

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日誌格式

 1     %(name)s            Name of the logger (logging channel)
 2     %(levelno)s         Numeric logging level for the message (DEBUG, INFO,
 3                         WARNING, ERROR, CRITICAL)
 4     %(levelname)s       Text logging level for the message ("DEBUG", "INFO",
 5                         "WARNING", "ERROR", "CRITICAL")
 6     %(pathname)s        Full pathname of the source file where the logging
 7                         call was issued (if available)
 8     %(filename)s        Filename portion of pathname
 9     %(module)s          Module (name portion of filename)
10     %(lineno)d          Source line number where the logging call was issued
11                         (if available)
12     %(funcName)s        Function name
13     %(created)f         Time when the LogRecord was created (time.time()
14                         return value)
15     %(asctime)s         Textual time when the LogRecord was created
16     %(msecs)d           Millisecond portion of the creation time
17     %(relativeCreated)d Time in milliseconds when the LogRecord was created,
18                         relative to the time the logging module was loaded
19                         (typically at application startup time)
20     %(thread)d          Thread ID (if available)
21     %(threadName)s      Thread name (if available)
22     %(process)d         Process ID (if available)
23     %(message)s         The result of record.getMessage(), computed just as
24                         the record is emitted