code: def change_score_for(self, member, delta, member_data=None):
          '''
          Change the score for a member in the leaderboard by a score delta which can be positive or negative.
  
          @param member [String] Member name.
          @param delta [float] Score change.
          @param member_data [String] Optional member data.
          '''
          self.change_score_for_member_in(self.leaderboard_name, member, delta, member_dataf change_score_for(self, member, delta, member_data=None):
          '''
          Change the score for a member in the leaderboard by a score delta which can be positive or negative.
  
          @param member [String] Member name.
          @param delta [float] Score change.
          @param member_data [String] Optional member data.
          '''
          self.change_score_for_member_in(self.leaderboard_name, member, delta, member_data)
docs: Change the score for a member in the leaderboard by a score delta which can be positive or negative.
  
          @param member [String] Member name.
          @param delta [float] Score change.
          @param member_data [String] Optional member data.