fff
  9   7ˆl–Ým_JJh¥ ² ¸È®2ò˜´oÊƒq·ža–Ü4ý('TËmJq@Šã-\iµ1hßÐ ¼    7"""      turtle-example-suite:

            tdemo_nim.py
         
Play nim against the computer. The player
who takes the last stick is the winner.

Implements the model-view-controller
design pattern.
"""


import turtle
import random
import time

SCREENWIDTH = 640
SCREENHEIGHT = 480

MINSTICKS = 7
MAXSTICKS = 31

HUNIT = SCREENHEIGHT // 12
WUNIT = SCREENWIDTH // ((MAXSTICKS // 5) * 11 + (MAXSTICKS % 5) * 2)

SCOLOR = (63, 63, 31)
HCOLOR = (255, 204, 204)
COLOR = (204, 204, 255)

def randomrow():
    return random.randint(MINSTICKS, MAXSTICKS)

def computerzug(state):
    xored = state[0] ^ state[1] ^ state[2]
    if xored == 0:
        return randommove(state)
    for z in range(3):
        s = state[z] ^ xored
        if s <= state[z]:
            move = (z, s)
            return move

def randommove(state):
    m = max(state)   
    while True:
        z = random.randint(0,2)
        if state[z] > (m > 1):
            break
    rand = random.randint(m > 1, state[z]-1)
    return z, rand


class NimModel(object):
    def __init__(self, game):
        self.game = game

    def setup(self):
        if self.game.state not in [Nim.CREATED, Nim.OVER]:
            return
        self.sticks = [randomrow(), randomrow(), randomrow()]
        self.player = 0
        self.winner = None
        self.game.view.setup()
        self.game.state = Nim.RUNNING
        
    def move(self, row, col):
        maxspalte = self.sticks[row]
        self.sticks[row] = col
        self.game.view.notify_move(row, col, maxspalte, self.player)
        if self.game_over():
            self.game.state = Nim.OVER
            self.winner = self.player
            self.game.view.notify_over()
        elif self.player == 0:
            self.player = 1
            row, col = computerzug(self.sticks)
            self.move(row, col)
            self.player = 0
        
    def game_over(self):
        return self.sticks == [0, 0, 0]

    def notify_move(self, row, col):
        if self.sticks[row] <= col:
            return
        self.move(row, col)


class Stick(turtle.Turtle):
    def __init__(self, row, col, game):
        turtle.Turtle.__init__(self, visible=False)
        self.row = row
        self.col = col
        self.game = game
        x, y = self.coords(row, col)
        self.shape("square")
        self.shapesize(HUNIT/10.0, WUNIT/20.0)
        self.speed(0)
        self.pu()
        self.goto(x,y)
        self.color("white")
        self.showturtle()
            
    def coords(self, row, col):
        packet, remainder = divmod(col, 5)
        x = (3 + 11 * packet + 2 * remainder) * WUNIT
        y = (2 + 3 * row) * HUNIT
        return x - SCREENWIDTH // 2 + WUNIT // 2, SCREENHEIGHT // 2 - y - HUNIT // 2
        
    def makemove(self, x, y):
        if self.game.state != Nim.RUNNING:
            return
        self.game.controller.notify_move(self.row, self.col)


class NimView(object):
    def __init__(self, game):
        self.game = game
        self.screen = game.screen
        self.model = game.model
        self.screen.colormode(255)
        self.screen.tracer(False)
        self.screen.bgcolor((240, 240, 255))
        self.writer = turtle.Turtle(visible=False)
        self.writer.pu()
        self.writer.speed(0)
        self.sticks = {}
        for row in range(3):
            for col in range(MAXSTICKS):
                self.sticks[(row, col)] = Stick(row, col, game)
        self.display("... a moment please ...")
        self.screen.tracer(True)

    def display(self, msg1, msg2=None):
        self.screen.tracer(False)
        self.writer.clear()
        if msg2 is not None:
            self.writer.goto(0, - SCREENHEIGHT // 2 + 48)
            self.writer.pencolor("red")
            self.writer.write(msg2, align="center", font=("Courier",18,"bold"))
        self.writer.goto(0, - SCREENHEIGHT // 2 + 20)
        self.writer.pencolor("black")
        self.writer.write(msg1, align="center", font=("Courier",14,"bold"))
        self.screen.tracer(True)