Codecademy export

script.py

from stack import Stack

print("\nLet's play Towers of Hanoi!!")

#Create the Stacks

stacks = []
left_stack = Stack('Left')
middle_stack = Stack('Middle')
right_stack = Stack('Right')
stacks += [left_stack, middle_stack, right_stack]

#Set up the Game

num_disks = int(input('\nHow many disks do you want to play with?\n'))

while num_disks < 3:
  num_disks = int(input('\nEnter a number greater than or equal to 3\n'))

for disk in range(num_disks, 0, -1):
  left_stack.push(disk)
#left_stack.print_items()

num_optimal_moves = (2** num_disks) -1
print("\nThe fastest you can solve this game is in {0} moves".format(num_optimal_moves))

#Get User Input

def get_input():
  choices = [stack.get_name()[0] for stack in stacks]

  while True:
    for i in range(len(stacks)):
      name = stacks[i].get_name()
      letter = choices[i]
      print("Enter {0} for {1}".format(letter, name))
      
    user_input = input("")

    if user_input in choices:
      for i in range(len(stacks)):
        return stacks[i]
       
#Play the Game
num_user_moves = 0

while right_stack.get_size() != num_disks:

  print("\n\n\n...Current Stacks...")
  for stack in stacks:
    stack.print_items()

  while True:
    
    print("\nWhich stack do you want to move from?\n")
    from_stack = get_input()
    print("\nWhich stack do you want to move to?\n")
    to_stack = get_input()

    if from_stack.is_empty():
      print("\n\nInvalid Move. Try Again")
    elif to_stack.get_size() == 0 or from_stack.peek() < to_stack.peek():
      disk = from_stack.pop()
      to_stack.push(disk)
      num_user_moves += 1
      break

    else:
      print("\n\nInvalid Move. Try Again")


print("\n\nYou completed the game in {0} moves, and the optimal number of moves is {1}".format(num_user_moves, num_optimal_moves))

stack.py

from node import Node

class Stack:
  def __init__(self, name):
    self.size = 0
    self.top_item = None
    self.limit = 1000
    self.name = name
  
  def push(self, value):
    if self.has_space():
      item = Node(value)
      item.set_next_node(self.top_item)
      self.top_item = item
      self.size += 1
    else:
      print("No more room!")

  def pop(self):
    if self.size > 0:
      item_to_remove = self.top_item
      self.top_item = item_to_remove.get_next_node()
      self.size -= 1
      return item_to_remove.get_value()
    print("This stack is totally empty.")

  def peek(self):
    if self.size > 0:
      return self.top_item.get_value()
    print("Nothing to see here!")

  def has_space(self):
    return self.limit > self.size

  def is_empty(self):
    return self.size == 0
  
  def get_size(self):
    return self.size
  
  def get_name(self):
    return self.name
  
  def print_items(self):
    pointer = self.top_item
    print_list = []
    while(pointer):
      print_list.append(pointer.get_value())
      pointer = pointer.get_next_node()
    print_list.reverse()
    print("{0} Stack: {1}".format(self.get_name(), print_list))