def author(self):
        """获取答案作者.

        :return: 答案作者
        :rtype: Author
        """
        from .author import Author

        author = self.soup.find('div', class_='zm-item-answer-author-info')
        url, name, motto, photo = parser_author_from_tag(author)
        if name == '匿名用户':
            return ANONYMOUS
        else:
            return Author(url, name, motto, photo_url=photo,
                          session=self._session)
获取答案作者.

        :return: 答案作者
        :rtype: Author