save project

snake.py

@@ -27,16 +27,16 @@ 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 setheading !='left':
+            if event.key == locals.K_RIGHT and setheading !='left':
                 setheading = 'right'
                 snake_head = right
-            if event.key == locals.K_RIGHT setheading !='right':
+            if event.key == locals.K_RIGHT and setheading !='right':
                 setheading = 'left'
                 snake_head = left
-            if event.key == locals.K_RIGHT setheading !='down':
+            if event.key == locals.K_RIGHT and setheading !='down':
                 setheading = 'up'
                 snake_head = up   
-            if event.key == locals.K_RIGHT setheading !='up':
+            if event.key == locals.K_RIGHT and setheading !='up':
                 setheading = 'down'
                 snake_head = down