class TreasureChest:
    # your code goes here
    def __init__(self, item):

        self.item = item
        self.is_open = False

    def print_description(self):

        if self.is_open:
            print(self.item)
        else:
            print("a locked treasure chest")

    def open(self):

        self.is_open = True


# your code goes here

p = TreasureChest("a book of immense Python knowledge")
q = TreasureChest("the guardian of group work")

p.print_description()

p.open()

p.print_description()

print("")

q.print_description()

q.open()

q.print_description()