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()
 
@@ -54,12 +54,9 @@ while True:
         y += 30
     position.append((x, y))
     if x == apple_x and apple_y: 
-        num1 = random.randint(0,22)
-        num2 = random.randint(0,16)
-        apple_x = 30*num1 - 30        
-        apple_y = 30*num2 - 30
-    else:
-        position.pop(0)
+        apple_x = random.randint(0,660)        
+        apple_y = random.randint(0,480)
+    position.pop(0)
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇的头画上去
@@ -72,4 +69,4 @@ while True:
     screen.blit(food, (360, 300))
     # 刷新画面
     pygame.display.update()
-    FPSCLOCK.tick(3)
\ No newline at end of file
+    FPSCLOCK.tick(3)