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()
 
@@ -12,11 +12,20 @@ background = pygame.image.load('bg.png')
 right = pygame.image.load('right.png')
 food = pygame.image.load('apple.png')
 body = pygame.image.load('body.png')
+left = pygame.image.load('left.png')
+up = pygame.image.load('up.png')
+down = pygame.image.load('down.png')
+
 
 
 FPSCLOCK=pygame.time.Clock()
 x,y=240,120
 position=[(180,90),(180,120),(210,120),(x,y)]
+apple_x = 360
+apple_y = 360
+
+setheading ="right"
+snake_head = right
 
 while True:
     for event in pygame.event.get():
@@ -26,22 +35,40 @@ while True:
         if 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":
                 setheading ='left'
-            if event.key ==locals.K_UP and setheading       
-    x+=30
+                snake_head =left
+            if event.key ==locals.K_UP and setheading !="down":
+                setheading ='up'
+                snake_head =up
+            if event.key == locals.K_DOWN and setheading !="up":
+                setheading ='down'
+                snake_head =down  
+    if setheading =="right":
+       x += 30
+    elif setheading =="left":
+       x -= 30
+    elif setheading =="up":
+       y -= 30         
+    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(right, position[-1])
+    screen.blit(snake_head, position[-1])
     # 将贪吃蛇的身体画上去
     for i in range(len(position)-1):
         screen.blit(body,position[i])
 
     # 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)
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