def play_game():
load = is_yes(input("Load game? "))
if not load:
guess = Guesser("Does it have legs?", "cat", "snake")
print()
else:
guess = LinkedBinaryTree.load_tree("tree.dat")
print("Loaded\n")
again = True
while again:
print("Think of an animal, and I will guess it.")
again = ask(guess)
if again:
print()
if is_yes(input("Save game? ")):
guess.save_tree("tree.dat")
print("Saved")
