def METHOD_NAME(with_t=False):
    """return ISO format of current timestamp:
    argument
    --------
    with_t    boolean (False)
    when with_t is True, the returned string
    will match 'YYYY-mm-ddTHH:MM:SS'
    otherwise  'YYYY-mm-dd HH:MM:SS'
    """
    if with_t:
        time.strftime('%Y-%m-%dT%H:%M:%S')
    return time.strftime('%Y-%m-%d %H:%M:%S')