':return:  ç­æ¡æ¶èæ°é
:rtype: int'

@property
@check_soup('_collect_num')
def collect_num(self):

    element = self.soup.find('a', {'data-za-a': 'click_answer_collected_count'})
    if (element is None):
        return 0
    else:
        return int(element.get_text())
