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__pycache__	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
__init__.py	0 B	-rw-r--r--	2024-04-17 20:28
__main__.py	9.16 KB	-rwxr-xr-x	2024-04-17 20:28
about_turtle.txt	3.46 KB	-rw-r--r--	2017-09-19 12:02
about_turtledemo.txt	307 B	-rw-r--r--	2017-09-19 12:02
bytedesign.py	4.16 KB	-rwxr-xr-x	2024-04-17 20:28
chaos.py	953 B	-rw-r--r--	2024-04-17 20:28
clock.py	2.96 KB	-rwxr-xr-x	2024-04-17 20:28
colormixer.py	1.4 KB	-rw-r--r--	2024-04-17 20:28
demohelp.txt	2.21 KB	-rw-r--r--	2017-09-19 12:02
forest.py	2.93 KB	-rwxr-xr-x	2024-04-17 20:28
fractalcurves.py	3.39 KB	-rwxr-xr-x	2024-04-17 20:28
lindenmayer.py	2.39 KB	-rwxr-xr-x	2024-04-17 20:28
minimal_hanoi.py	1.93 KB	-rwxr-xr-x	2024-04-17 20:28
nim.py	6.35 KB	-rw-r--r--	2024-04-17 20:28
paint.py	1.11 KB	-rwxr-xr-x	2024-04-17 20:28
peace.py	1.1 KB	-rwxr-xr-x	2024-04-17 20:28
penrose.py	3.47 KB	-rwxr-xr-x	2024-04-17 20:28
planet_and_moon.py	2.81 KB	-rwxr-xr-x	2024-04-17 20:28
round_dance.py	1.76 KB	-rw-r--r--	2024-04-17 20:28
tree.py	1.4 KB	-rwxr-xr-x	2024-04-17 20:28
turtle.cfg	160 B	-rw-r--r--	2017-09-19 12:02
two_canvases.py	972 B	-rwxr-xr-x	2024-04-17 20:28
wikipedia.py	1.32 KB	-rw-r--r--	2024-04-17 20:28
yinyang.py	833 B	-rwxr-xr-x	2024-04-17 20:28

Rename

#! /opt/alt/python33/bin/python3.3
"""       turtle-example-suite:

tdemo_minimal_hanoi.py

A minimal 'Towers of Hanoi' animation:
A tower of 6 discs is transferred from the
left to the right peg.

An imho quite elegant and concise
implementation using a tower class, which
is derived from the built-in type list.

Discs are turtles with shape "square", but
stretched to rectangles by shapesize()
 ---------------------------------------
       To exit press STOP button
 ---------------------------------------
"""
from turtle import *

class Disc(Turtle):
    def __init__(self, n):
        Turtle.__init__(self, shape="square", visible=False)
        self.pu()
        self.shapesize(1.5, n*1.5, 2) # square-->rectangle
        self.fillcolor(n/6., 0, 1-n/6.)
        self.st()

class Tower(list):
    "Hanoi tower, a subclass of built-in type list"
    def __init__(self, x):
        "create an empty tower. x is x-position of peg"
        self.x = x
    def push(self, d):
        d.setx(self.x)
        d.sety(-150+34*len(self))
        self.append(d)
    def pop(self):
        d = list.pop(self)
        d.sety(150)
        return d

def hanoi(n, from_, with_, to_):
    if n > 0:
        hanoi(n-1, from_, to_, with_)
        to_.push(from_.pop())
        hanoi(n-1, with_, from_, to_)

def play():
    onkey(None,"space")
    clear()
    hanoi(6, t1, t2, t3)
    write("press STOP button to exit",
          align="center", font=("Courier", 16, "bold"))

def main():
    global t1, t2, t3
    ht(); penup(); goto(0, -225)   # writer turtle
    t1 = Tower(-250)
    t2 = Tower(0)
    t3 = Tower(250)
    # make tower of 6 discs
    for i in range(6,0,-1):
        t1.push(Disc(i))
    # prepare spartanic user interface ;-)
    write("press spacebar to start game",
          align="center", font=("Courier", 16, "bold"))
    onkey(play, "space")
    listen()
    return "EVENTLOOP"

if __name__=="__main__":
    msg = main()
    print(msg)
    mainloop()