':return: æ¶å°ççèµåæ°é
:rtype: int'

@property
@check_soup('_upvote_num')
def upvote_num(self):

    if (self.url is None):
        return 0
    else:
        number = int(self.soup.find('span', class_='zm-profile-header-user-agree').strong.text)
        return number
