Towers of Hanoi project

Towers of Hanoi

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+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("Enter 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 = ["""letter""" for stack in stacks]
+
+  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
+
+#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.get_size() == 0:
+      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))
+
+Traceback (most recent call last):
+  File "script.py", line 59, in <module>
+    if from_stack.get_size() == 0:
+AttributeError: 'list' object has no attribute 'get_size'