python贪吃蛇源代码

import pygame, sys, random
from pygame.locals import *

pygame.init()
mainClock = pygame.time.Clock()

WINDOWWIDTH = 400
WINDOWHEIGHT = 400
rectLength = 18

windowsurface = pygame.display.set_mode((WINDOWWIDTH,WINDOWHEIGHT),0,32)
pygame.display.set_caption('Snake')

BLACK = (0,0,0)
GREEN = (0,255,0)

snakeRect = []
for i in range(7,10):
    snakeRect.append(pygame.Rect(i*(rectLength+2)+1,0+1,rectLength,rectLength))
food = pygame.Rect(5*(rectLength+2),5*(rectLength+2),rectLength+2,rectLength+2)   
moveLeft = True
moveRight = False
moveUp = False
moveDown = False

direction = 1
foodImage = pygame.image.load('cherry.png')
pygame.mixer.music.load('background.mid')
pygame.mixer.music.play(-1,0.0)

pickUpSound = pygame.mixer.Sound('pickup.wav')
while True:
    for event in pygame.event.get():
        if event.type == QUIT:
            pygame.quit()
            sys.exit()
        if event.type == KEYDOWN:
            if event.key == K_LEFT and moveRight==False:
                moveLeft = True
                moveRight = False
                moveUp = False
                moveDown = False
            if event.key == K_RIGHT and moveLeft==False:
                moveLeft = False
                moveRight = True
                moveUp = False
                moveDown = False
            if event.key == K_UP and moveDown==False:
                moveLeft = False
                moveRight = False
                moveUp = True
                moveDown = False
            if event.key == K_DOWN and moveUp==False:
                moveLeft = False
                moveRight = False
                moveUp = False
                moveDown = True
    head = pygame.Rect(snakeRect[0].left,snakeRect[0].top,snakeRect[0].width,snakeRect[0].height)
    if moveLeft == True:
        head.right = head.left-2
    if moveRight == True:
        head.left = head.right+2
    if moveUp == True:
        head.bottom = head.top-2
    if moveDown == True:
        head.top = head.bottom+2
    snakeRect.insert(0,head);
    if head.right<0 or head.left>WINDOWWIDTH or head.bottom<0 or head.top>WINDOWHEIGHT:
        break
    if food.left == snakeRect[0].left-1 and food.top == snakeRect[0].top-1:
        food.left = random.randint(0,WINDOWWIDTH/20-1)*(rectLength+2)
        food.top = random.randint(0,WINDOWHEIGHT/20-1)*(rectLength+2)
        pickUpSound.play()
    else:
         snakeRect.pop(len(snakeRect)-1)
    windowSurface.fill(BLACK)
    for i in range(len(snakeRect)):
        pygame.draw.rect(windowSurface,GREEN,snakeRect[i])
    windowSurface.blit(foodImage,food)
    if food.left == 0 and food.right == 0:
        i = 3
    pygame.display.update()
    mainClock.tick(10)