python自定义logger handler

 _filefmt=os.path.join("logs","%Y-%m-%d.log")
 class MyLoggerHandler(logging.Handler):
     def __init__(self,filefmt=None):
         self.filefmt=filefmt
         if filefmt is None:
             self.filefmt=_filefmt
         logging.Handler.__init__(self)
     def emit(self,record):
         msg=self.format(record)
         _filePath=datetime.datetime.now().strftime(self.filefmt)
         _dir=os.path.dirname(_filePath)
         try:
             if os.path.exists(_dir) is False:
                 os.makedirs(_dir)
         except Exception:
             print("can not make dirs")
             print("filepath is "+_filePath)
             pass
         try:
             _fobj=open(_filePath,'a')
             _fobj.write(msg)
             _fobj.write("\n")
             _fobj.flush()
             _fobj.close()
         except Exception:
             print("can not write to file")
             print("filepath is "+_filePath)
             pass
 if __name__ == '__main__':
     logging.basicConfig()
     logger = logging.getLogger("logger")
     logger.setLevel(logging.INFO)
     filehandler = MyLoggerHandler()
     logger.addHandler(filehandler)
     logger.info('log...')

如上，实现每天一个日志文件。