save project

snake.py

 import pygame
 from pygame import locals
+# 背景
+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')
+
 
 # 初始化pygame，为使用硬件做准备
 setheanding='right'
+snake_head=right
 pygame.init()
 x,y=240,120
 
@@ -11,11 +21,7 @@ screen = pygame.display.set_mode((660, 480))
 FPSCLOCK=pygame.time.Clock()
 position=[(180,90),(180,120),(210,120),(x,y)]
 
-# 背景
-background = pygame.image.load('bg.png')
-right = pygame.image.load('right.png')
-food = pygame.image.load('apple.png')
-body = pygame.image.load('body.png')
+
 
 while True:
     for event in pygame.event.get():
@@ -25,12 +31,16 @@ while True:
     if event.type==locals.KEYDOWN:
         if event.key==locals.K_RIGHT and setheanding!='left':
             setheanding='right'
+            snake_head=right
         if event.key==locals.K_LEFT and setheanding!='right':
             setheanding='left'
+            snake_head=left
         if event.key==locals.K_UP and setheanding!='down':
             setheanding='up'
+            snake_head=up
         if event.key==locals.K_DOWN and setheanding!='up':
             setheanding='down'
+            snake_head=down
     if setheanding=='right':
         x+=30
     elif setheanding=='left':
@@ -45,7 +55,7 @@ while True:
     # 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])