save project

snake.py

 import pygame
-from pygame import locals
+from pygame.locals import *
 
 # 初始化pygame，为使用硬件做准备
 pygame.init()
@@ -9,24 +9,60 @@ screen = pygame.display.set_mode((660, 480))
 
 # 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')
+up = pygame.image.load('up.png')
+down = pygame.image.load('down.png')
+left = pygame.image.load('left.png')
+right = pygame.image.load('right.png')
+
+FPSLOCK = pygame.time.Clock()
+
+x,y = 240, 120
+position = [(180, 90),(210, 90),(210, 120),(x, y)]
+setheading = 'right'
+snake_head = right
 
 while True:
+    
     for event in pygame.event.get():
-        if event.type == locals.QUIT:
+        if event.type == QUIT:
             # 接收到退出事件后退出程序
             exit()
+        if event.type == KEYDOWN:
+            if event.key == pygame.K_UP and setheading != 'down':
+                setheading = 'up'
+                snake_head = up
+            if event.key == pygame.K_DOWN and setheading != 'up':
+                setheading = 'down'
+                snake_head = down
+            if event.key == pygame.K_LEFT and setheading != 'right':
+                setheading = 'left'
+                snake_head = left
+            if event.key == pygame.K_RIGHT and setheading != 'left':
+                setheading = 'right'
+                snake_head = right
+
+    if setheading == 'up':
+        y -= 30
+    elif setheading == 'down':
+        y += 30
+    elif setheading == 'right':
+        x += 30
+    elif setheading == 'left':
+        x -= 30
+    position.pop(0)
+    position.append((x,y))
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇画上去
-    screen.blit(right, (240, 120))
+    screen.blit(snake_head, position[-1])
+    
     # 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))
+    for i in range(len(position)-1):
+        screen.blit(body, position[i])
     # 将果实画上去
     screen.blit(food, (360, 300))
     # 刷新画面
-    pygame.display.update()
\ No newline at end of file
+    pygame.display.update()
+    FPSLOCK.tick(10)
\ No newline at end of file