条件xpath语句

Question

这是一段HTML，我想从中提取信息：

  <li>
    <p><strong class="more-details-section-header">Provenance</strong></p>
    <p>Galerie Max Hetzler, Berlin<br>Acquired from the above by the present owner</p>
  </li>

我希望有一个xpath表达式，它可以提取第二个<p> ... </p>的内容，具体取决于<p> ... Provenance ... </p>

之前是否有兄弟姐妹

这是我到目前为止的地方：

if "Provenance" in response.xpath('//strong[@class="more-details-section-header"]/text()').extract():
            print("provenance = yes")

但是如何进入Galerie Max Hetzler, Berlin<br>Acquired from the above by the present owner？

我试过

if "Provenance" in response.xpath('//strong[@class="more-details-section-header"]/text()').extract():
            print("provenance = yes ", response.xpath('//strong[@class="more-details-section-header"]/following-sibling::p').extract())

但是我得到了[]

Answer 1

你应该使用

//p[preceding-sibling::p[1]/strong='Provenance']/text()