python笔记6--日志输出

python笔记6--日志输出

• ​​python笔记6--日志输出​​

• ​​功能​​
• ​​代码​​
• ​​说明​​

python笔记6–日志输出

功能

1. 输出基本log信息
2. 根据level级别输出log信息，方法1
3. 根据level级别输出log信息，方法2
4. 将log信息写到文本中
5. 将log信息写到文本中，同时输出到终端
6. 将日志输入到/var/log/syslog中

代码

#!/usr/bin/python3

import logging
import sys
import syslog


def test_logging():
    '''
    func: 输出基本log信息
    '''
    logging.debug('debug message')
    logging.info('info message')
    logging.warning('warning message')
    logging.error('error message')
    logging.critical('critical message')


def test_logging2(level=logging.INFO):
    """
    根据level等级进行输出，方法1
    """
    # set default logging configuration
    logger = logging.getLogger()  # initialize logging class
    logger.setLevel(level)  # default log level
    format = logging.Formatter("%(asctime)s [%(levelname)-8s][%(processName)s:%(process)d-%(threadName)s][%(filename)s:%(lineno)d][%(message)s]")  # output format
    sh = logging.StreamHandler(stream=sys.stdout)  # output to standard output
    sh.setFormatter(format)
    logger.addHandler(sh)
    # use logging to generate log ouput
    logger.info("this is info")
    logger.debug("this is debug")
    logger.warning("this is warning")
    logging.error("this is error")
    logger.critical("this is critical")


def test_logging3(level=logging.INFO):
    """
    根据level等级进行输出，方法2
    """
    logging.basicConfig(level=level, format='%(asctime)s [%(levelname)-8s][%(processName)s:%(process)d-%(threadName)s][%(filename)s:%(lineno)d][%(message)s]')
    logger = logging.getLogger()
    logger.info("this is info")
    logger.debug("this is debug")
    logger.warning("this is warning")
    logging.error("this is error")
    logger.critical("this is critical")


def test_logging4(level=logging.INFO):
    """
    将log信息输入到test.log文件中
    """
    logger = logging.getLogger()
    logger.setLevel(level)
    format = logging.Formatter('%(asctime)s [%(levelname)-8s][%(processName)s:%(process)d-%(threadName)s][%(filename)s:%(lineno)d][%(message)s]')
    hander=logging.FileHandler('test.log')
    hander.setFormatter(format)
    logger.addHandler(hander)
    logger.info("this is info")
    logger.debug("this is debug")
    logger.warning("this is warning")
    logging.error("this is error")
    logger.critical("this is critical")


def test_logging5(level=logging.INFO):
    """
    将log信息输入到test.log文件中，同时输出到控制台
    """
    logger = syslog.S
    logger.setLevel(level)
    format = logging.Formatter('%(asctime)s [%(levelname)-8s][%(processName)s:%(process)d-%(threadName)s][%(filename)s:%(lineno)d][%(message)s]')

    hander=logging.FileHandler('test.log')
    hander.setFormatter(format)
    logger.addHandler(hander)

    console=logging.StreamHandler()
    console.setLevel(level)
    logger.addHandler(console)

    logger.debug("this is debug")
    logger.info("this is info")
    logger.warning("this is warning")
    logging.error("this is error")
    logger.critical("this is critical")


def test_logging6():
    """
    将log信息输入到syslog中
    """
    syslog.syslog('This is test of syslog')


if __name__ == '__main__':
    # test_logging()
    # test_logging2(logging.INFO)
    # test_logging3(logging.DEBUG)
    # test_logging4(logging.DEBUG)
    # test_logging5(logging.DEBUG)
    test_logging6()

注意：
若果需要显示具体行等信息，可以通过 traceback.print_exc() 来实现

import traceback
print(traceback.print_exc())

说明

笔者测试系统为Ubuntu1910，Python3.7.