在把日志写入文件的同时在控制台输出

示例代码如下： 

#coding=utf-8import loggingimport timeimport osdir = os.path.dirname(os.path.abspath('.'))log_path = dir + '\\log'class Log:    def __init__(self):        self.logname = os.path.join(log_path, '{0}.log'.format(time.strftime('%Y-%m-%d')))    def __printconsole(self, level, message):        # 创建一个logger        logger = logging.getLogger()        logger.setLevel(logging.DEBUG)        # 创建一个handler，用于写入日志文件        fh = logging.FileHandler(self.logname,'a',encoding='utf-8')        fh.setLevel(logging.DEBUG)        # 再创建一个handler，用于输出到控制台        ch = logging.StreamHandler()        ch.setLevel(logging.DEBUG)        # 定义handler的输出格式        formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')        fh.setFormatter(formatter)        ch.setFormatter(formatter)        # 给logger添加handler        logger.addHandler(fh)        logger.addHandler(ch)        # 记录一条日志        if level == 'info':            logger.info(message)        elif level == 'debug':            logger.debug(message)        elif level == 'warning':            logger.warning(message)        elif level == 'error':            logger.error(message)        logger.removeHandler(ch)        logger.removeHandler(fh)        # 关闭打开的文件        fh.close()    def debug(self,message):        self.__printconsole('debug', message)    def info(self,message):        self.__printconsole('info', message)    def warning(self,message):        self.__printconsole('warning', message)    def error(self,message):        self.__printconsole('error', message)if __name__ == '__main__':    log = Log()    log.info('info msg1000013333')    log.debug('debug msg')    log.warning('warning msg')    log.error('error msg')

　　输出结果如下：

> "D:\Python27\python.exe"  "D:\work\code\test\test\wirteLog.py" 2017-05-09 15:09:32,763 - root - INFO - info msg10000133332017-05-09 15:09:32,769 - root - DEBUG - debug msg2017-05-09 15:09:32,776 - root - WARNING - warning msg2017-05-09 15:09:32,782 - root - ERROR - error msg