save project

snake.py

@@ -27,10 +27,10 @@ while True:
             # 接收到退出事件后退出程序
             exit()
         elif event .type==locals.KEYDOWN:
-            if event.key==locals.K_RIGHT and setheading != "right"
+            if event.key==locals.K_RIGHT and setheading != "left"
                  setheading='right'
                  snake_head=right               
-            if event.key==locals.K_LEFT and setheading != "left":
+            if event.key==locals.K_LEFT and setheading != "":
                 setheading='left'
                  snake_head=left
             if event.key==locals.K_UP and setheading != "up":