save project

snake.py

 import pygame
 from pygame import locals
+import random
 
 # 初始化pygame，为使用硬件做准备
 pygame.init()
@@ -51,11 +52,15 @@ while True:
         y -= 30
     else:
         y += 30
+    position.append((x, y))    
     if x==apple_x and y==apple_y:
-        apple_x=random randint(0,660)
-        apple_y=random randint(0,480)
-    position.append((x, y))
-    position.pop(0)
+     
+        num1= random.randint(1,22)
+        num2= random.randint(1,16)    
+        apple_x=num1*30-30
+        apple_y=num2*30-30
+    else:    
+        position.pop(0)
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇的头画上去