import time


def get_date_string_or(string):
    """If the string starts with 6 digits, that will be returned
    as a date in iso format.  Otherwise, today's date in iso
    format is returned.
    """
    if str(string[:5]).isdigit():
        return '{}-{}-{}'.format(string[:4], string[4:6], string[6:8])
    return time.strftime("%Y-%m-%d")