code: def upvoters(self):
          
          from .author import Author, ANONYMOUS
          self._make_soup()
          headers = dict(Default_Header)
          headers['Host'] = 'zhuanlan.zhihu.com'
          json = self._session.get(
              Post_Get_Upvoter.format(self.slug),
              headers=headers
          ).json()
          for au in json:
              try:
                  yield Author(
                          au['profileUrl'],
                          au['name'],
                          au['bio'],
                          photo_url=au['avatar']['template'].format(
                                  id=au['avatar']['id'], size='r'),
                          session=self._session
                  )
              except ValueError:  # invalid url
                  yield ANONYMOUS
docs: 获取文章的点赞用户
  
          :return: 文章的点赞用户，返回生成器。