auto save

a.py

+from random import randint
+a=randint(2,5)
+print(a)
\ No newline at end of file

snake.py

 import pygame
-
-# 初始化pygame，为使用pygame做准备
+from pygame inport  locals
+# 初始化pygame，pd为使用pygame做准备
 pygame.init()
 
 # 创建一个窗口
-screen=pygame.display.set_mode((800,600))
\ No newline at end of file
+screen=pygame.display.set_mode((800,600))
+whil True:
+    for event in pygame.event.gat():
+        if event.type==locals.QUITE:
+            exit()
\ No newline at end of file