auto save

snake.py

 import pygame
+import random
 from pygame import locals
-
-# 初始化pygame，为使用硬件做准备
 pygame.init()
-
-# 创建一个窗口
-screen = pygame.display.set_mode((660, 480))
-
-# 背景
-background = pygame.image.load('bg.png')
-right = pygame.image.load('right.png')
-food = pygame.image.load('apple.png')
-body = pygame.image.load('body.png')
-
+background=pygame.image.load('bg.png')
+right=pygame.image.load('right.png')
+body=pygame.image.load('body.png')
+food=pygame.image.load('apple.png')
+left=pygame.image.load('left.png')
+up=pygame.image.load('up.png')
+down=pygame.image.load('down.png')
+screen=pygame.display.set_mode((660,480))
+setheading='right'
+snakehead=right
+t=pygame.time.Clock()
+x,y=300,330
+apple_x=510
+apple_y=180
+position=[(240,300),(240,330),(270,330),(x,y)]
 while True:
     for event in pygame.event.get():
-        if event.type == locals.QUIT:
-            # 接收到退出事件后退出程序
+        if event.type==locals.QUIT:
             exit()
-    # 将背景图画上去
-    screen.blit(background, (0, 0))
-    # 将贪吃蛇画上去
-    screen.blit(right, (240, 120))
-    # 将贪吃蛇的身体画上去
-    screen.blit(body, (210, 120))
-    screen.blit(body, (180, 120))
-    screen.blit(body, (180, 90))
-    # 将果实画上去
-    screen.blit(food, (360, 300))
-    # 刷新画面
+        if event.type==locals.KEYDOWN:
+            if event.key==locals.K_RIGHT and setheading!='left':
+                setheading='right'
+                snakehead=right
+            if event.key==locals.K_LEFT and setheading!='right':
+                setheading='left'
+                snakehead=left
+            if event.key==locals.K_UP and setheading!='down':
+                setheading='up'
+                snakehead=up
+            if event.key==locals.K_DOWN and setheading!='up':
+                setheading='down'
+                snakehead=down
+    if setheading=='right':
+        x+=30
+    elif setheading=='left':
+        x-=30
+    elif setheading=='up':
+        y-=30
+    else:
+        y+=30
+    if x==apple_x and y==apple_y:
+        n1=random.randint(1,22)
+        n2=random.randint(1,16)
+        apple_x=n1*30-30
+        apple_y=n2*30-30
+    else:
+        position.pop(0)
+    screen.blit(background,(0,0))
+    position.append((x,y)) 
+    screen.blit(snakehead,position[-1])
+    for i in range(len(position)-1):
+        screen.blit(body,position[i])
+    screen.blit(food,(apple_x,apple_y))
+    t.tick(3)
     pygame.display.update()
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