在写Python游戏项目时，最重要的时python中的pygame库。安装pygame库和用法在我CSDN博客另一篇文章上。这里就不详细说了。下边时运行游戏界面。

下边是详细的代码和注释

import pygame,sys,random,time
from pygame.locals import *   #从pygame模块导入常用的函数和常量
#定义颜色变量
black_colour = pygame.Color(0,0,0)
white_colour = pygame.Color(255,255,255)
red_colour = pygame.Color(255,0,0)
grey_colour = pygame.Color(150,150,150)
#定义游戏结束函数
def GameOver(gamesurface):#设置提示字体的格式GameOver_font = pygame.font.SysFont("MicrosoftYaHei", 16)#设置提示字体的颜色GameOver_colour = GameOver_font.render('Game Over',True,grey_colour)#设置提示位置GameOver_location = GameOver_colour.get_rect()GameOver_location.midtop = (320,10)#绑定以上设置到句柄gamesurface.blit(GameOver_colour,GameOver_location)#提示运行信息pygame.display.flip()#休眠5秒time.sleep(5)#退出游戏pygame.quit()#退出程序sys.exit()
#定义主函数
def main():#初始化pygame，为使用硬件做准备pygame.init()pygame.time.Clock()ftpsClock = pygame.time.Clock()#创建一个窗口gamesurface = pygame.display.set_mode((640,480))#设置窗口的标题pygame.display.set_caption('tanchishe snake')#初始化变量#初始化贪吃蛇的起始位置snakeposition = [100,100]#初始化贪吃蛇的长度snakelength = [[100,100],[80,100],[60,100]]#初始化目标方块的位置square_purpose = [300,300]#初始化一个数来判断目标方块是否存在square_position = 1#初始化方向，用来使贪吃蛇移动derection = "right"change_derection = derection#进行游戏主循环while True:#检测按键等pygame事件for event in pygame.event.get():if event.type==QUIT:#接收到退出事件后，退出程序pygame.quit()sys.exit()elif event.type==KEYDOWN:#判断键盘事件,用w,s,a,d来表示上下左右if event.key==K_RIGHT or event.key==ord('d'):change_derection = "right"if event.key==K_LEFT or event.key==ord('a'):change_derection = "left"if event.key==K_UP or event.key==ord('w'):change_derection = "up"if event.key==K_DOWN or event.key==ord('s'):change_derection = "down"if event.key==K_ESCAPE:pygame.event.post(pygame.event.Event(QUIT))#判断移动的方向是否相反if change_derection =='left'and not derection =='right':derection = change_derectionif change_derection =='right'and not derection =='left':derection = change_derectionif change_derection == 'up' and not derection =='down':derection = change_derectionif change_derection == 'down' and not derection == 'up':derection = change_derection#根据方向，改变坐标if derection == 'left':snakeposition[0] -= 20if derection == 'right':snakeposition[0] += 20if derection == 'up':snakeposition[1] -= 20if derection == 'down':snakeposition[1] += 20#增加蛇的长度snakelength.insert(0,list(snakeposition))#判断是否吃掉目标方块if snakeposition[0]==square_purpose[0] and snakeposition[1]==square_purpose[1]:square_position = 0else:snakelength.pop()#重新生成目标方块if square_position ==0:#随机生成x,y,扩大二十倍，在窗口范围内x = random.randrange(1,32)y = random.randrange(1,24)square_purpose = [int(x*20),int(y*20)]square_position = 1#绘制pygame显示层gamesurface.fill(black_colour)for position in snakelength:pygame.draw.rect(gamesurface,white_colour,Rect(position[0],position[1],20,20))pygame.draw.rect(gamesurface,red_colour,Rect(square_purpose[0],square_purpose[1],20,20))#刷新pygame显示层pygame.display.flip()#判断是否死亡if snakeposition[0]<0 or snakeposition[0]>620:GameOver(gamesurface)if snakeposition[1]<0 or snakeposition[1]>460:GameOver(gamesurface)for snakebody in snakelength[1:]:if snakeposition[0]==snakebody[0] and snakeposition[1]==snakebody[1]:GameOver(gamesurface)#控制游戏速度ftpsClock.tick(5)if __name__ == "__main__":main()