':return: ç­æ¡äžè¯è®ºçæ°é
:rtype: int'

@property
@check_soup('_comment_num')
def comment_num(self):

    comment = self.soup.select_one('div.answer-actions    a.toggle-comment')
    comment_num_string = comment.text
    number = comment_num_string.split()[0]
    return (int(number) if number.isdigit() else 0)
