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""" 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)
def setup(self):
self.screen.tracer(False)
for row in range(3):
for col in range(self.model.sticks[row]):
self.sticks[(row, col)].color(SCOLOR)
for row in range(3):
for col in range(self.model.sticks[row], MAXSTICKS):
self.sticks[(row, col)].color("white")
self.display("Your turn! Click leftmost stick to remove.")
self.screen.tracer(True)
def notify_move(self, row, col, maxspalte, player):
if player == 0:
farbe = HCOLOR
for s in range(col, maxspalte):
self.sticks[(row, s)].color(farbe)
else:
self.display(" ... thinking ... ")
time.sleep(0.5)
self.display(" ... thinking ... aaah ...")
farbe = COLOR
for s in range(maxspalte-1, col-1, -1):
time.sleep(0.2)
self.sticks[(row, s)].color(farbe)
self.display("Your turn! Click leftmost stick to remove.")
def notify_over(self):
if self.game.model.winner == 0:
msg2 = "Congrats. You're the winner!!!"
else:
msg2 = "Sorry, the computer is the winner."
self.display("To play again press space bar. To leave press ESC.", msg2)
def clear(self):
if self.game.state == Nim.OVER:
self.screen.clear()
class NimController(object):
def __init__(self, game):
self.game = game
self.sticks = game.view.sticks
self.BUSY = False
for stick in self.sticks.values():
stick.onclick(stick.makemove)
self.game.screen.onkey(self.game.model.setup, "space")
self.game.screen.onkey(self.game.view.clear, "Escape")
self.game.view.display("Press space bar to start game")
self.game.screen.listen()
def notify_move(self, row, col):
if self.BUSY:
return
self.BUSY = True
self.game.model.notify_move(row, col)
self.BUSY = False
class Nim(object):
CREATED = 0
RUNNING = 1
OVER = 2
def __init__(self, screen):
self.state = Nim.CREATED
self.screen = screen
self.model = NimModel(self)
self.view = NimView(self)
self.controller = NimController(self)
def main():
mainscreen = turtle.Screen()
mainscreen.mode("standard")
mainscreen.setup(SCREENWIDTH, SCREENHEIGHT)
nim = Nim(mainscreen)
return "EVENTLOOP!"
if __name__ == "__main__":
main()
turtle.mainloop()