Adding products programatically – adding attribute to basket

Hi, I have a script that adds a product using wp_insert_post()

It’s all fine and the product is added but i’m not sure how to add an attribute then pass the attribute through to the basket using $woocommerce->cart->add_to_cart

Can somebody give me any advice?

http://ww.wp.xz.cn/extend/plugins/woocommerce/