new_contents: #!/usr/bin/env python3
  # -*- coding: utf-8 -*-
  
  """
  Make statistics on score files (stored in JSON files).
  """
  
  import argparse
  import json
  import math
  import numpy as np
  import operator
  
  def parse_json_file(json_file_path):
      with open(json_file_path, "r") as fd:
          json_data = json.load(fd)
      return json_data
  
  
  def extract_score_list(json_dict, score_index):
      io_list = json_dict["io"]
      json_data = [image_dict["score"][score_index] for image_dict in io_list if "score" in image_dict]
      return json_data
  
  
  if __name__ == '__main__':
  
      # PARSE OPTIONS ###########################################################
  
      parser = argparse.ArgumentParser(description="Make statistics on score files (JSON files).")
  
      parser.add_argument("--index", "-i", type=int, default=0, metavar="INT", 
                          help="The index of the score to plot in case of multivalued scores")
  
      parser.add_argument("fileargs", nargs="+", metavar="FILE",
                          help="The JSON file to process")
  
      args = parser.parse_args()
  
      json_file_path_list = args.fileargs
      score_index = args.index
  
  
      # FETCH SCORE #############################################################
  
      data_dict = {}
      error_list = []
  
      for json_file_path in json_file_path_list:
          try:
              json_dict = parse_json_file(json_file_path)
              score_array = np.array(extract_score_list(json_dict, score_index))
              mean_score = score_array.mean()
              if math.isnan(mean_score):
                  error_list.append(json_file_path)
              else:
                  data_dict[json_file_path] = mean_score
          except: 
              error_list.append(json_file_path)
  
      print("ERRORS")
      for path in error_list:
          print(path)
  
      print("")
      print("SORTED SCORES")
      for path, mean in sorted(data_dict.items(), key=operator.itemgetter(1), reverse=True):
          print(mean, path)
  
  
subject: Add a script to sort score files according to their mean scores.