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 > DEBUG
logging.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logger
logger = 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_name
file_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)

# 如果需要同時需要在終端上輸出，定義一個streamHandler
print_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logging
logging.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')