auto save

snake.py

@@ -29,16 +29,16 @@ while True:
             # 接收到退出事件后退出程序
             exit()
         if event.type == locals.KEYDOWN:
-            if event.key == locals.K_RIGHT and setheading != "left":
+            if event.key == locals.K_RIGHT:
                 setheading = 'right'
                 snake_head = right
-            if event.key == locals.K_LEFT and setheading != "right":
+            if event.key == locals.K_LEFT:
                 setheading = 'left'
                 snake_head = left
-            if event.key == locals.K_UP and setheading != "down":
+            if event.key == locals.K_UP:
                 setheading = 'up'
                 snake_head = up
-            if event.key == locals.K_DOWN and setheading != "up":
+            if event.key == locals.K_DOWN:
                 setheading = 'down'
                 snake_head = down