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()
 
@@ -19,6 +19,8 @@ down = pygame.image.load('down.png')
 
 x,y = 240, 120
 position = [(180,90), (180,120), (210,120), (x,y)]
+apple_x = 360
+apple_y = 300
 setheading = 'right'
 snake_head = right
 while True:
@@ -49,13 +51,16 @@ while True:
     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.pop(0)            
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇画上去
     screen.blit(snake_head, position[-1])
     # 将贪吃蛇的身体画上去
-    for i in range(len(position[-1])):
+    for i in range(len(position)-1):
         screen.blit(body, position[i])
     # 将果实画上去
     screen.blit(food, (360, 300))