new_contents: def main() -> None:
      s = set("Test")
  
      print(s.difference("Another"))
      print(s.difference(set(['a', 'b', 'c', 'd'])))
      print(s.difference(['a', 'b', 'c', 'd']))
      print(s.difference(enumerate(['a', 'b', 'c', 'd'])))
      print(s.difference({"Another":1}))
      print(s - set("Another"))
  
  
  if __name__ == '__main__':
      main()
  
  
  
subject: Add set.difference.py