auto save

snake.py

@@ -25,17 +25,15 @@ while True:
         if event.type == locals.QUIT:
             # 接收到退出事件后退出程序
             exit()
-        elif event.type ==locals.QUIT
-          if event.key==locals.K_RIGHT and setheading! = "left":
+        elif event.type == locals.QUIT:
+          if event.key == locals.K_RIGHT and setheading!= "left":
             setheading="right"
             sanke_head=right
-          if event.key==locals.K_LEFT and setheading! = "right":
+          if event.key==locals.K_LEFT and setheading!= "right":
             setheading="left"
             sanke_head=left
-          if event.key==locals.K_UP and setheading! = "down":
+          if event.key==locals.K_UP and setheading!= "down":
             setheading="up"
-           sanke_head=up
-           if event.key==locals.K_DOWN and setheading! = "up":
              setheading="down"
            sanke_head=down
     if setheading =="right":