new_contents: from adventurelib import Item, Bag, when
  
  kitchen = Item('kitchen')
  kitchen.description = """\
  The kitchen is lined with copper pots and pans.
  There is a faint smell of the pea and ham soup that was served at
  lunchtime.
  """
  
  library = Item('library')
  library.description = """\
  The library is panelled with oak and has an impressive collection of
  literature and legal tomes.
  
  A copy of the recently-released The Great Gatsby lies on a wooden lamp
  table beside a wing chair.
  """
  
  dining_room = Item('dining room', 'dining')
  dining_room.description = """\
  The imposing dining table is dressed in white linen with a woven golden
  border. Silver cutlery is laid in 7 places for dinner... though one will not
  be joining them.
  """
  
  
  
  rooms = Bag({
      kitchen,
      library,
      dining_room
  })
  
  
  @when('list rooms')
  def list_rooms():
      print("Albermore Manor is a Victorian-era house with:")
      for r in rooms:
          print(r)
  
subject: Add three initial rooms