save project

snake.py

@@ -21,6 +21,10 @@ while True:
         if event.type == locals.QUIT:
             # 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":
+                stheading = 'right'
+            if event.key == locals.K_LEFT and setheading !="right":
     x += 30
     position.append((x,y))
     position.pop(0)