code: def author(self):
          
          from .author import Author, ANONYMOUS
  
          logs = self._query_logs()
          author_a = logs[-1].find_all('div')[0].a
          if author_a.text == '匿名用户':
              return ANONYMOUS
          else:
              url = Zhihu_URL + author_a['href']
              return Author(url, name=author_a.text, session=self._session)
docs: 获取问题的提问者.
          
          :return: 提问者
          :rtype: Author or zhihu.ANONYMOUS