logging模块

logging模块

logging模块两种应用

1、函数级

    关注 输出和设置

import logging
logging.basicConfig(level=logging.DEBUG,format='%(asctime)s %(filename)s[line:%(lineno)d] %(levelname)s %(message)s %(threadName)s %(thread)d %(process)d',datefmt='%a, %d %b %Y %H:%M:%S')  
  
logging.info("error")
logging.debug('debug message')

　　这里还可以显示出来 线程和进程%(thread)d %(process)d

2、对象级

    1）程序设置

    关注对象，方法和场景

    logger ->   getLogger

    句柄对象 -> 1）FileHandler  2）StreamHandler 

    设置对象 -> Formatter

    过滤器 -> Filter

    场景为，先定义日志对象，然后定义句柄对象确认输出目标，然后设置输出的格式，中间有添加到句柄对象的过程。    

import logging

logger1 = logging.getLogger("fir")
logger1.setLevel(logging.DEBUG)

formatter = logging.Formatter('%(asctime)s - %(name)s \
- %(levelname)s - %(message)s') # 1config
cm = logging.StreamHandler()    # 2out
cm.setFormatter(formatter)      # 3setting 
#fm = logging.FileHanfler("D:\FIR.log")
filter1 = logging.Filter("fir")
#logger1.addFilter(filter1)
cm.addFilter(filter1)
logger1.addHandler(cm)          # 4log

#logger1.setFormatter(formatter)  >AttributeError:\
#'Logger' object has no attribute 'setFormatter'

logger1.debug('debug log1')
logger1.info('info log1')
logger1.error('error log1')

    　2）文本配置