python的logging模块简单应用
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2022-06-10 20:59:13
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Python3 标准库自带logging模块,使用的时候直接引用
写log
import logging # 引入logging模块 from logging.handlers import TimedRotatingFileHandler import os.path import time # 第一步,创建一个logger logger = logging.getLogger() logger.setLevel(logging.INFO) # Log等级总开关 # 第二步,创建一个handler,用于写入日志文件 rq = time.strftime('%Y%m%d%H%M', time.localtime(time.time())) log_path = os.path.dirname(os.getcwd()) + '/log/Logs/' log_name = log_path + rq + '.log' logfile = log_name fh = logging.FileHandler(logfile, mode='w') fh.setLevel(logging.DEBUG) # 输出到file的log等级的开关 # 第三步,定义handler的输出格式 formatter = logging.Formatter("%(asctime)s - %(filename)s[line:%(lineno)d] - %(levelname)s: %(message)s") #创建TimedRotatingFileHandler对象 log_file_handler = TimedRotatingFileHandler(filename="ds_update", when="D", interval=2, backupCount=2) fh.setFormatter(formatter) # 第四步,将logger添加到handler里面 logger.addHandler(fh) # 日志 # logger.debug('this is a logger debug message') # logger.info('this is a logger info message') # logger.warning('this is a logger warning message') # logger.error('this is a logger error message') # logger.critical('this is a logger critical message') # filename:日志文件名的prefix; # # when:是一个字符串,用于描述滚动周期的基本单位,字符串的值及意义如下: # “S”: Seconds # “M”: Minutes # “H”: Hours # “D”: Days # “W”: Week day (0=Monday) # “midnight”: Roll over at midnight # # interval: 滚动周期,单位有when指定,比如:when=’D’,interval=1,表示每天产生一个日志文件 # # backupCount: 表示日志文件的保留个数
如何引用logger方法?
from app.log.log import logger data={ "bdCode":"GSXA0580" } # 使用python自带的字符串格式化,不推荐 logger.info("%s data的值为:%s"%("hello world!!",data)) # 使用logger的格式化,推荐 logger.info("%s data的值为:%s","hello world!!",data) logger.info("data:",data) # 使用format函数,推荐 logger.info("{}data的值是:{}".format("Hello,world!!!",data)) for i in range(1,20): print(i) logger.info("i的值为:%s,入参为:%s",i,data)
打印日志如下:
2018-06-10 15:52:37,817 - showlog.py[line:11] - INFO: hello world!! data的值为:{'bdCode': 'GSXA0580'} 2018-06-10 15:52:37,817 - showlog.py[line:13] - INFO: hello world!! data的值为:{'bdCode': 'GSXA0580'} 2018-06-10 15:52:37,817 - showlog.py[line:14] - INFO: data: 2018-06-10 15:52:37,818 - showlog.py[line:16] - INFO: Hello,world!!!data的值是:{'bdCode': 'GSXA0580'} 2018-06-10 15:52:37,818 - showlog.py[line:19] - INFO: i的值为:1,入参为:{'bdCode': 'GSXA0580'} 2018-06-10 15:52:37,818 - showlog.py[line:19] - INFO: i的值为:2,入参为:{'bdCode': 'GSXA0580'} 2018-06-10 15:52:37,818 - showlog.py[line:19] - INFO: i的值为:3,入参为:{'bdCode': 'GSXA0580'} 2018-06-10 15:52:37,818 - showlog.py[line:19] - INFO: i的值为:4,入参为:{'bdCode': 'GSXA0580'} 2018-06-10 15:52:37,818 - showlog.py[line:19] - INFO: i的值为:5,入参为:{'bdCode': 'GSXA0580'} 2018-06-10 15:52:37,818 - showlog.py[line:19] - INFO: i的值为:6,入参为:{'bdCode': 'GSXA0580'} 2018-06-10 15:52:37,818 - showlog.py[line:19] - INFO: i的值为:7,入参为:{'bdCode': 'GSXA0580'} 2018-06-10 15:52:37,818 - showlog.py[line:19] - INFO: i的值为:8,入参为:{'bdCode': 'GSXA0580'} 2018-06-10 15:52:37,818 - showlog.py[line:19] - INFO: i的值为:9,入参为:{'bdCode': 'GSXA0580'} 2018-06-10 15:52:37,819 - showlog.py[line:19] - INFO: i的值为:10,入参为:{'bdCode': 'GSXA0580'} 2018-06-10 15:52:37,819 - showlog.py[line:19] - INFO: i的值为:11,入参为:{'bdCode': 'GSXA0580'} 2018-06-10 15:52:37,819 - showlog.py[line:19] - INFO: i的值为:12,入参为:{'bdCode': 'GSXA0580'} 2018-06-10 15:52:37,819 - showlog.py[line:19] - INFO: i的值为:13,入参为:{'bdCode': 'GSXA0580'} 2018-06-10 15:52:37,820 - showlog.py[line:19] - INFO: i的值为:14,入参为:{'bdCode': 'GSXA0580'} 2018-06-10 15:52:37,820 - showlog.py[line:19] - INFO: i的值为:15,入参为:{'bdCode': 'GSXA0580'} 2018-06-10 15:52:37,820 - showlog.py[line:19] - INFO: i的值为:16,入参为:{'bdCode': 'GSXA0580'} 2018-06-10 15:52:37,820 - showlog.py[line:19] - INFO: i的值为:17,入参为:{'bdCode': 'GSXA0580'} 2018-06-10 15:52:37,820 - showlog.py[line:19] - INFO: i的值为:18,入参为:{'bdCode': 'GSXA0580'} 2018-06-10 15:52:37,821 - showlog.py[line:19] - INFO: i的值为:19,入参为:{'bdCode': 'GSXA0580'}
参考文档:http://python.jobbole.com/86887/
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