save project

snake.py

 import pygame
+import random
 from pygame import locals
 # 初始化pygame，为使用硬件做准备
 pygame.init()
@@ -14,6 +15,8 @@ left = pygame.image.load('left.png')
 down = pygame.image.load('down.png')
 up = pygame.image.load('up.png')
 x,y=240,120
+apple_x=360
+apple_y=300
 position=[(180,90),(180,120),(210,120),(x,y)]
 setheading='right'
 snake_head=right
@@ -44,6 +47,9 @@ while True:
     if setheading=='up' and setheading!='down':
         y-=30
     position.append((x,y))
+    if x==apple_x and y==apple_y:
+        apple_x = random.randint(0,630)
+        apple_y = random.randint(0,450)
     position.pop(0)
     # 将背景图画上去
     screen.blit(background, (0, 0))
@@ -53,7 +59,7 @@ while True:
      # 将贪吃蛇画上去
     screen.blit(snake_head,position[-1])
     # 将果实画上去
-    screen.blit(food, (360, 300))
+    screen.blit(food, (apple_x, apple_y))
     # 刷新画面
     pygame.display.update()
     FPSclock.tick(0.01)
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