diff CSP2/CSP2_env/env-d9b9114564458d9d-741b3de822f2aaca6c6caa4325c4afce/lib/python3.8/turtledemo/minimal_hanoi.py @ 69:33d812a61356

planemo upload commit 2e9511a184a1ca667c7be0c6321a36dc4e3d116d
author jpayne
date Tue, 18 Mar 2025 17:55:14 -0400
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/CSP2/CSP2_env/env-d9b9114564458d9d-741b3de822f2aaca6c6caa4325c4afce/lib/python3.8/turtledemo/minimal_hanoi.py	Tue Mar 18 17:55:14 2025 -0400
@@ -0,0 +1,79 @@
+#!/usr/bin/env python3
+"""       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()
+    try:
+        hanoi(6, t1, t2, t3)
+        write("press STOP button to exit",
+              align="center", font=("Courier", 16, "bold"))
+    except Terminator:
+        pass  # turtledemo user pressed STOP
+
+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()