code: def query_by_post(postid):
          '''
          Get reply list of certain post.
          '''
          return TabReply.select().where(
              TabReply.post_id == postid
          ).order_by(TabReply.timestamp.desc()f query_by_post(postid):
          '''
          Get reply list of certain post.
          '''
          return TabReply.select().where(
              TabReply.post_id == postid
          ).order_by(TabReply.timestamp.desc())
docs: Get reply list of certain post.