code: def list_user_comments(self, topic_id, user_alias=None):
          
          user_alias = user_alias or self.api.user_alias
          comment_start = 0
          results = []
          while comment_start is not None:
              comments = self.list_comments(topic_id, comment_start)
              results += [item for item in comments['results'] if item['author_alias'] == user_alias]
              comment_start = comments['next_start']
          return results
docs: 列出用户在话题下的所有回复
          
          :param topic_id: 话题ID
          :param user_alias: 用户ID，默认当前
          :return: 纯列表