new_contents: import optparse
  import os
  
  optparser = optparse.OptionParser()
  optparser.add_option("-n", "--new_files", dest="new_files", default="", help="Comma separated list of new files")
  optparser.add_option("-d", "--directory", dest="directory", default="dictionaries/", help="Directory with dictionaries")
  optparser.add_option("-i", "--start_suffix", dest="start_suffix", type=int, help="Start suffix, i.e. the last suffix + 1")
  (opts, _) = optparser.parse_args()
  
  full_path = os.path.abspath(opts.directory)
  
  new_filenames = opts.new_files.split(',')
  
  existing_english_words = set()
  for filename in os.listdir(full_path):
      if filename.startswith('dict') and not filename in new_filenames:
          for line in open(full_path+'/'+filename, encoding='utf-8'):
              translations = line.strip().split('\t')
              foreign_word = translations[0]
  
              # skip the first word because it is the foreign word
              for word in translations[1:]:
                  existing_english_words.add(word)
  
  new_english_words = set()
  for filename in new_filenames:
      for line in open(full_path + '/' + filename, encoding='utf-8'):
          translations = line.strip().split('\t')
          foreign_word = translations[0]
  
          # skip the first word because it is the foreign word
          for word in translations[1:]:
              if word not in existing_english_words:
                  new_english_words.add(word)
  
  all_english_words_list = list(new_english_words)
  
  words_per_batch = 10000
  words_by_batch = [all_english_words_list[i:i+words_per_batch] for i in range(0, len(all_english_words_list), words_per_batch)]
  
  start_suffix = opts.start_suffix or 0
  
  for i, word_batch in enumerate(words_by_batch):
      with open(full_path+'/english.superset'+"{0:0=2d}".format(start_suffix+i), 'w', encoding='utf-8') as text_file:
          text_file.write("\n".join(word_batch))
  
subject: Add script that creates an addendum to the english superset, to account for new dictionaries being added. Ensures we don't already have the english words in the existing set before adding them in