save project

snake.py

@@ -28,7 +28,7 @@ while True:
         if event.type == locals.QUIT:
         if event.type == locals.QUIT:
             # 接收到退出事件后退出程序
             # 接收到退出事件后退出程序
             exit()
             exit()
-        if event.type==locals.KEYDOWN:
+        elif event.type==locals.KEYDOWN:
             if event.key==locals.K_RIGHT and setheading != "left":
             if event.key==locals.K_RIGHT and setheading != "left":
                 setheading='right'
                 setheading='right'
                 snake_head=right
                 snake_head=right