save project

snake.py

 import pygame
 import pygame
 from pygame import locals
 from pygame import locals
-
-# 初始化pygame，为使用硬件做准备
 pygame.init()
 pygame.init()
-
-# 创建一个窗口
 screen = pygame.display.set_mode((660, 480))
 screen = pygame.display.set_mode((660, 480))
-
-# 背景
+FPSCLOCK=pygame.time.Clock()
 background = pygame.image.load('bg.png')
 background = pygame.image.load('bg.png')
 right = pygame.image.load('right.png')
 right = pygame.image.load('right.png')
 food = pygame.image.load('apple.png')
 food = pygame.image.load('apple.png')
 body = pygame.image.load('body.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')
 x,y=240,120
 x,y=240,120
+position=[(180,90),(180,120),(210,120),(x,y)]
+setheading="right"
+snake_head=right
 while True:
 while True:
     for event in pygame.event.get():
     for event in pygame.event.get():
         if event.type == locals.QUIT:
         if event.type == locals.QUIT:
-            # 接收到退出事件后退出程序
             exit()
             exit()
-    x+=30
-    # 将背景图画上去
+        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"
+                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)) 
+    position.pop(0)
     screen.blit(background, (0, 0))
     screen.blit(background, (0, 0))
-    # 将贪吃蛇画上去
-    screen.blit(right, (x, y))
-    # 将贪吃蛇的身体画上去
-    screen.blit(body, (210, 120))
-    screen.blit(body, (180, 120))
-    screen.blit(body, (180, 90))
-    # 将果实画上去
+    screen.blit(snake_head, position[-1])
+    for i in range(len(position)-1):
+        screen.blit(body, position[i] )
     screen.blit(food, (360, 300))
     screen.blit(food, (360, 300))
-    #刷新画面
-    pygame.display.update()
+    pygame.display.update()
+    FPSCLOCK.tick(8)
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