save project

snake.py

 import pygame
 from pygame import locals
 from pygame import time
+import random
 
 # 初始化pygame，为使用硬件做准备
 pygame.init()
@@ -12,6 +13,8 @@ screen = pygame.display.set_mode((660, 480))
 x=240
 y=120
 position = [(120,90),(180,120),(210,120),(x,y)]
+apple_x=330
+apple_y=240
 # 背景
 background = pygame.image.load('bg.png')
 right = pygame.image.load('right.png')
@@ -28,17 +31,17 @@ while True:
         if event.type == locals.QUIT:
             # 接收到退出事件后退出程序
             exit()
-        if event.type == locals.KEYDOWN:
-            if event.key == locals.K_RIGHT and setheading != "left" : 
+        elif event.type == locals.KEYDOWN:
+            if event.key == locals.K_RIGHT and setheading != 'left' : 
                 setheading = 'right'   
                 snake_head = right
-            if event.key == locals.K_LEFT and setheading != "right":  
+            if event.key == locals.K_LEFT and setheading != 'right':  
                 setheading = 'left'   
                 snake_head = left       
-            if event.key == locals.K_UP and setheading != "down":  
+            if event.key == locals.K_UP and setheading != 'down':  
                 setheading = 'up'   
                 snake_head = up
-            if event.key == locals.K_DOWN and setheading != "up":  
+            if event.key == locals.K_DOWN and setheading != 'up':  
                 setheading = 'down'   
                 snake_head = down
     if setheading == 'right':
@@ -50,6 +53,9 @@ while True:
     if setheading == 'down':
         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))
@@ -64,7 +70,7 @@ while True:
  #   screen.blit(body, (180, 120))
  #   screen.blit(body, (180, 90))
     # 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(3)
\ No newline at end of file
+    FPSCLOCK.tick(4)
\ No newline at end of file