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()
@@ -22,8 +23,8 @@ position = [(180, 90), (180, 120), (210, 120), (x, y)]
 
 setheading = "right"
 snake_head = right
-apple-x=340
-apple-y=300
+apple_x=340
+apple_y=300
 while True:
     for event in pygame.event.get():
         if event.type == locals.QUIT:
@@ -53,6 +54,12 @@ while True:
         y -= 30
     else:
         y += 30
+    if x==apple_x and y==apple_y:
+        apple_x=random.randint(0,21)
+        apple_y=random.randint(0,15)
+        apple_x=apple_x*30
+        apple_y=apple_y*30
+
     position.append((x, y))
     position.pop(0)
     # 将背景图画上去
@@ -64,7 +71,7 @@ while True:
         screen.blit(body, position[i])
 
     # 将果实画上去
-    screen.blit(food, (apple,x,apple,y))    
+    screen.blit(food, (apple,x,apple,y)) 
     # 刷新画面
     pygame.display.update()
     FPSCLOCK.tick(3)
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