如何使用 scrapy 抓取带有 xpath 或其他方式的 JSON 元素标签的值？-解网

问：

我使用 Scrapy 抓取页面，到目前为止，我在 XPATH 上取得了成功，但我对那个页面有点挣扎。我正在尝试获取dimensionsImageKey的值：

<img id="fullViewImg" class="img-responsive"
             onerror="this.onerror = null; this.src = '/prod/Images/noImageAvalBig.jpg';"
             dimensionsImageKey="[{"k":"37081793~SID~B342~S0~I1~RW2576~H1932~TH0","w":2576,"h":1932,"sn":"","sid":37081793,"b":342,"in":1,"i":0,"s":0,"ar":1.33,"art":1.35,"tw":96,"th":72},{"k":"37081793~SID~B342~S0~I2~RW2576~H1932~TH0","w":2576,"h":1932,"sn":"","sid":37081793,"b":342,"in":2,"i":1,"s":0,"ar":1.33,"art":1.35,"tw":96,"th":72])">

我得到的最好的是

response.xpath('//*[@dimensionsimagekey]/@dimensionsimagekey').getall()

它只返回'[{

似乎它只返回两个双引号之间的内容。有没有办法用 Scrapy 和 Xpath 实现这一目标？

json xpath scrapy

如何使用 scrapy 抓取带有 xpath 或其他方式的 JSON 元素标签的值？

How to use scrapy to scrape the value of a HTML element tag which is JSON with xpath or in another way?

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