code: def change_score_for_member_in(self, leaderboard_name, member, delta, member_data=None):
          '''
          Change the score for a member in the named leaderboard by a delta which can be positive or negative.
  
          @param leaderboard_name [String] Name of the leaderboard.
          @param member [String] Member name.
          @param delta [float] Score change.
          @param member_data [String] Optional member data.
          '''
          pipeline = self.redis_connection.pipeline()
          pipeline.zincrby(leaderboard_name, member, delta)
          if member_data:
              pipeline.hset(
                  self._member_data_key(leaderboard_name),
                  member,
                  member_data)
          pipeline.execute(f change_score_for_member_in(self, leaderboard_name, member, delta, member_data=None):
          '''
          Change the score for a member in the named leaderboard by a delta which can be positive or negative.
  
          @param leaderboard_name [String] Name of the leaderboard.
          @param member [String] Member name.
          @param delta [float] Score change.
          @param member_data [String] Optional member data.
          '''
          pipeline = self.redis_connection.pipeline()
          pipeline.zincrby(leaderboard_name, member, delta)
          if member_data:
              pipeline.hset(
                  self._member_data_key(leaderboard_name),
                  member,
                  member_data)
          pipeline.execute()
docs: Change the score for a member in the named leaderboard by a delta which can be positive or negative.
  
          @param leaderboard_name [String] Name of the leaderboard.
          @param member [String] Member name.
          @param delta [float] Score change.
          @param member_data [String] Optional member data.