'Add to the parser the options common to all the
label actions'

def __init__(self):

    super(label, self).__init__()
    self.parser.add_option('-B', '--blist', help='File    listing    the    labels', type='string', default=None, metavar='LABEL_FLIST')
    self.topic_parse_info = topic_common.item_parse_info(attribute_name='labels', filename_option='blist', use_leftover=True)
