auto save

snake.py

 import pygame
+from pygame import locals
 
 #初始化pygame,为使用硬件做准备
 pygame.init()
 
 #创建窗口
 screen = pygame.display.set_mode((660,480))
-
-while True:
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+while True:
+    for event in pygame.event.get():
+        if event.type == locals.QUIT:
+            #接受到退出事件后推出程序
+            exit()
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