auto save

snake.py

 import pygame
 from pygame import locals
-xy = []
 FPS = pygame.time.Clock()
 
 # 初始化pygame，为使用硬件做准备
@@ -12,8 +11,15 @@ screen = pygame.display.set_mode((660, 480))
 # 背景
 background = pygame.image.load('bg.png')
 right = pygame.image.load('right.png')
+left = pygame.image.load('left.png')
+down = pygame.image.load('down.png')
+up = pygame.image.load('up.png')
 food = pygame.image.load('apple.png')
 body = pygame.image.load('body.png')
+xandy = 240,120
+xy = [(180,90),(180,120),(210,120),(x,y)]
+setheading = 'right'
+snake_head = right
 
 while True:
     FPS.tick(3)
@@ -21,10 +27,34 @@ while True:
         if event.type == locals.QUIT:
             # 接收到退出事件后退出程序
             exit()
+        elif event.type == locals.KEYDOWN:
+            if event.key == locals.K_RIGHT and sethanding != 'left':
+                sethending = 'right'
+                snake_head = right
+            if event.key == locals.K_LEFT and sethanding != 'right':
+                setheanding = 'left'
+                snake_head = left
+            if event.key == locals.K_UP and sethanding != 'down':
+                sethending = 'up'
+                snake_head = up
+            if event.key == locals.K_DOWN and sethanding != 'up':
+                setheanding = 'down'
+                snake_head = down
+    if setheading == 'right':
+        x+=30
+    elif setheading == 'left':
+        x-=30
+    elif sethanding == 'up':
+        y-=30
+    else:
+        y+=30
+    xy.append(xandy)
+    xy.pop(0)
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇画上去
-    screen.blit(right, xy[3])
+    for i in range(len(xy)-1):
+        screen.blit(body,xy[i])
     # 将贪吃蛇的身体画上去
     screen.blit(body, xy[2])
     screen.blit(body, xy[1])