':return: å³æ³šæ­€æ¶èå€¹çäººæ°
:rtype: int'

@property
@check_soup('_follower_num')
def follower_num(self):

    href = re_collection_url_split.match(self.url).group(1)
    return int(self.soup.find('a', href=(href + 'followers')).text)
