Python中使用logging和traceback模块记录日志和跟踪异常

#!/usr/bin/env python# -*- coding:utf-8 -*-import logging # 引入logging模块# 设置打印日志级别 CRITICAL > ERROR > WARNING > INFO > DEBUGlogging.basicConfig(level = logging.DEBUG,format = '%(asctime)s - %(name)s -%(filename)s[line:%(lineno)d] - %(levelname)s - %(message)s')# 将信息打印到控制台上logging.debug(u"调试")logging.info(u"执行打印功能")logging.warning(u"警告")logging.error(u"错误")logging.critical(u"致命错误")

#!/usr/bin/env python# -*- coding:utf-8 -*-import logging # 引入logging模块import os.path# 第一步，创建一个loggerlogger = logging.getLogger()logger.setLevel(logging.DEBUG) # Log等级开关# 第二步，创建一个handler，用于写入日志文件log_path = os.path.dirname(os.getcwd()) + '/Logs/'log_name = log_path + 'log.log'logfile = log_namefile_handler = logging.FileHandler(logfile, mode='a+')file_handler.setLevel(logging.ERROR) # 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")file_handler.setFormatter(formatter)# 第四步，将handler添加到logger里面logger.addHandler(file_handler)# 如果需要同需要在端上出，定一streamHandlerprint_handler = logging.StreamHandler() # 往屏幕上输出print_handler.setFormatter(formatter) # 设置屏幕上显示的格式logger.addHandler(print_handler)# 日志信息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')# 或使用logginglogging.debug('this is a logger debug message')logging.info('this is a logger info message')logging.warning('this is a logger warning message')logging.error('this is a logger error message')logging.critical('this is a logger critical message')

try：  doSomething()except:  traceback.print_exc()  # logging.error(str(traceback.format_exc()))

traceback.print_exc(file=open('traceback_INFO.txt','w+'))