auto save

snake.py

 import pygame
 from pygame import locals
+import random
 
 # 初始化pygame，为使用硬件做准备
 pygame.init()
@@ -52,7 +53,9 @@ while True:
         y -= 30
     else:
         y += 30
-    if apple_x = x and apple_y = y:
+    if apple_x == x and apple_y == y:
+        apple_x=random.randint(0,660)
+        apple_y=random.randint(0,480)
     position.append((x, y))
     position.pop(0)
     # 将背景图画上去