How to use the visualdl.server.log.logger.error function in visualdl

try:
            query = urlencode({
                'sample': 0,
                'index': step_index,
                'tag': origin_tag,
                'run': mode,
            })
            res.append({
                'height': shape[0],
                'width': shape[1],
                'step': record.step_id(),
                'wall_time': image.timestamp(step_index),
                'query': query,
            })
        except Exception:
            logger.error("image sample out of range")

    return res

def retry(ntimes, function, time2sleep, *args, **kwargs):
    '''
    try to execute `function` `ntimes`, if exception catched, the thread will
    sleep `time2sleep` seconds.
    '''
    for i in range(ntimes):
        try:
            return function(*args, **kwargs)
        except Exception:
            error_info = '\n'.join(map(str, sys.exc_info()))
            logger.error("Unexpected error: %s" % error_info)
            time.sleep(time2sleep)