不打印 xpath 的空结果

Question

我也需要从 xml 查询中获取空值，该查询将链接作为结果数组返回。有些程度没有链接可供参考。打印时，不会打印相应的空结果。目的是获取对应度的链接。我的代码是：  postgraduatedegrees=tree.xpath('//*[@id="block-scholarly-   content"]/div/article/div/div/div//*[contains(text(),"Degree   of")]/text()')  postgraduatedegreeslinks=tree.xpath('//*[@id="block-scholarly-   content"]/div/article/div/div/div//*[contains(text(),"Degree of")]/@href')  Output:   len(postgraduatedegrees)   Out[222]: 52  len(postgraduatedegreeslinks)   Out[223]: 40  空值正在被删除。请帮我解决问题

Answer 1

解决办法是

url="the url of the web page"

page = requests.get(url, headers={'User-Agent': 'Mozilla/5.0'})

tree = html.fromstring(page.content)

postgraduate=tree.xpath('//*[@id="block-scholarly-content"]/div/article/div/div/div//*[contains(text(),"Degree of")]')

for pg in postgraduate:

   pgcourse= pg.xpath('.//text()')

   pglink=pg.xpath('.//@href')

for 循环也将通过空结果进行迭代。