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()
 
@@ -48,8 +48,14 @@ while True:
     else:
         y+=30
     position.append((x,y))
-    if x == apple_x 
-    position.pop(0)
+    # 将苹果画上去
+    if x == apple_x and y == apple_y:
+        num1 = random.randint(0,22)
+        num2 = random.randint(0,16)
+        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))
     # 将贪吃蛇画上去