我想选择标签中包含的所有href...这是我的html代码
<a href="/gp/product/0545935172 ...." class="aok-block aok-nowrap" title="Dog Man: Lord of the Fleas: From the Creator of Captain Underpants (Dog Man #5)">
我用过response.css('a.aok-block::attr(href)').extract()
,但结果是:[]