Python 日志管理封装

封装python中的logging方便日常使用

class Logger(object):
    level_mapping = {
        'debug': logging.DEBUG,
        'info': logging.INFO,
        'warning': logging.WARNING,
        'error': logging.ERROR,
        'critical': logging.CRITICAL
    }  # 日志映射

    def __init__(self, filename, level='info', when='D', backCount=3,
                 fmt='%(asctime)s - [line:%(lineno)d] - %(levelname)s: %(message)s'):
        self.logger = logging.getLogger(filename)
        format_str = logging.Formatter(fmt)  # 设置格式
        self.logger.setLevel(self.level_mapping.get(level))  # 设置级别
        self.logger.propagate = False  # 关闭logger向上级传输
        stream = logging.StreamHandler()  # 流形式向屏幕输出
        stream.setFormatter(format_str)  # 流的显示的格式
        file = handlers.TimedRotatingFileHandler(filename=filename, when=when, backupCount=backCount,
                                                 encoding='utf-8')  # 往文件里写入
        # Calculate the real rollover interval, which is just the number of
        # seconds between rollovers.  Also set the filename suffix used when
        # a rollover occurs.  Current 'when' events supported:
        # S 秒
        # M 分
        # H 小时
        # D 天
        # W 每星期（interval==0时代表星期一）
        # midnight 凌晨
        file.setFormatter(format_str)  # 设置文件里写入的格式
        self.logger.addHandler(stream)  # 把对象加到logger里
        self.logger.addHandler(file)  # 把对象加到logger里

封装logging的类以后，通过修改init中的参数来设置日志输出级别，样式，日志生成时间间隔，最大备份数等

例如做一个小的网络监控小脚本运作日志输出：

if __name__ == '__main__':
    ip = "www.google.com"  # 修改自己需要ping的路径
    path = os.path.join(os.path.dirname(__file__), 'pingLogs.log')
    # 日志存放位置
    log = Logger(filename=path)
    while True:
        time.sleep(1)
        ping = os.system("ping %s -n 1" % ip)  # ping 命令根据不同操作系统写不同ping格式  windows
        # ping = os.system('ping -c 1 -W 1 %s' % ip)  # ping 命令根据不同操作系统写不同ping格式  linux
        if ping == 0:
            log.logger.info('connection is ok and continue ping to %s' % ip)
            continue
        else:
            log.logger.error('server is disconnected for %s check your network' % ip)
            continue