docs: def rank_member_in(
              self, leaderboard_name, member, score, member_data=None):
          '''
          Rank a member in the named leaderboard.
  
          @param leaderboard_name [String] Name of the leaderboard.
          @param member [String] Member name.
          @param score [float] Member score.
          @param member_data [String] Optional member data.
          '''
          member_score = None or self.redis_connection.zscore(leaderboard_name, member)
          can_delete_score = member_score is not None and\
              (len(self.members_from_score_range_in(leaderboard_name, member_score, member_score)) == 1) and\
              member_score != score
  
          pipeline = self.redis_connection.pipeline()
          if isinstance(self.redis_connection, Redis):
              pipeline.zadd(leaderboard_name, member, score)
              pipeline.zadd(self._ties_leaderboard_key(leaderboard_name),
                            str(float(score)), score)
          else:
              pipeline.zadd(leaderboard_name, score, member)
              pipeline.zadd(self._ties_leaderboard_key(leaderboard_name),
                            score, str(float(score)))
          if can_delete_score:
              pipeline.zrem(self._ties_leaderboard_key(leaderboard_name),
                            str(float(member_score)))
          if member_data:
              pipeline.hset(
                  self._member_data_key(leaderboard_name),
                  member,
                  member_data)
          pipeline.execute()