new_contents: try:
      frozenset
  except NameError:
      print("SKIP")
      import sys
      sys.exit()
  
  # Examples from https://docs.python.org/3/library/stdtypes.html#set
  # "Instances of set are compared to instances of frozenset based on their
  # members. For example:"
  print(set('abc') == frozenset('abc'))
  # This doesn't work in uPy
  #print(set('abc') in set([frozenset('abc')]))
  
subject: Add test on set/frozenset equality.