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snake.py

-import pygame
-
+import pygame#导入pygame模块
+import random#导入random模块
+from pygame import locals#从pygame模块导入locals子模块
 # 初始化pygame，为使用pygame做准备
 # 初始化pygame，为使用pygame做准备
 pygame.init()
 pygame.init()
-
+background=pygame.image.load('bg.png')#载入背景图
+right=pygame.image.load('right.png')#贪吃蛇朝右的蛇头载入
+left=pygame.image.load('left.png')#贪吃蛇朝左的蛇头载入
+up=pygame.image.load('up.png')#贪吃蛇朝上的蛇头载入
+down=pygame.image.load('down.png')#贪吃蛇朝下的蛇头载入
+food=pygame.image.load('apple.png')#将食物苹果载入
+body=pygame.image.load('body.png')#将身体载入进去
+x,y=240,120#将蛇头的坐标赋值给一个变量
+apple_x=360
+apple_y=300
+position=[(180,90),(180,120),(210,120),(x,y)]#建立一个列表
+setheading = "right" #设置贪吃蛇的朝向
+snake_head=right
 # 创建一个窗口
 # 创建一个窗口
-??
+screen=pygame.display.set_mode(size=(660,480))
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+FPSCLOCK=pygame.time.Clock()
+while True:
+    for event in pygame.event.get():
+        if event.type==locals.QUIT:
+            exit()    #监听事件，如果按下了x键，那么就退出
+        if event.type==locals.KEYDOWN:
+            if event.key == locals.K_RIGHT and setheading != "left":#如果按下右键并且此时贪吃蛇的头部朝向不是左边时，设置朝向为右
+                setheading="right"
+                snake_head=right 
+            if event.key == locals.K_LEFT and setheading != "right":
+                setheading="left"
+                snake_head=left
+            if event.key == locals.K_UP and setheading != "down":
+                setheading="up"
+                snake_head=up
+            if event.key == locals.K_DOWN and setheading != "up":
+                setheading="down"
+                snake_head=down
+    if setheading=="right":
+        x+=30
+    elif setheading=="left":
+        x-=30
+    elif setheading=="up":
+        y-=30
+    else:
+        y+=30
+    position.append((x,y))#将新坐标添加到新列表里
+    if x==apple_x and y==apple_y:
+        apple_x=random.randint(0,660)
+        apple_y=random.randint(0,480)
+    position.pop(0)#删除掉第一个坐标
+    screen.blit(background,(0,0))#将背景图画上去
+    screen.blit(snake_head,position[-1])#将蛇头画上去
+    for i in range(len(position)-1):
+        screen.blit(body,position[i])
+    screen.blit(food,(apple_x,apple_y))#将食物画上去
+    pygame.display.update()#刷新画面
+    FPSCLOCK.tick(3)
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