auto save

snake.py

@@ -74,6 +74,7 @@ while True:
     # 将果实画上去
     screen.blit(food, (apple_x,apple_y))
     info='Score:'+str(score)
+    i
     # 刷新画面
     txt=my_font.render(info,True,(0,0,0))
     screen.blit(txt,(540,10))