':return: é®é¢ç­æ¡æ°é
:rtype: int'

@property
@check_soup('_answer_num')
def answer_num(self):

    answer_num_block = self.soup.find('h3', id='zh-question-answer-num')
    if (answer_num_block is None):
        if (self.soup.find('span', class_='count') is not None):
            return 1
        else:
            return 0
    return int(answer_num_block['data-num'])
