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python - 使用 xpath 获取特定键的所有值（python 网络抓取）

问题描述

假设我们有网页

<div class="specific-row" data-id="101736782"></div>
<div class="yellow-box-row" data-id="112376244"></div>
<div class="specific-row" data-id="179218312"></div>
<div class="vip-row" data-id="123749014"></div>

如何获取所有数据 ID值？喜欢 ['101736782', '112376244', '179218312', '123749014']

我使用了 tree.xpath

import requests
from lxml import html

r = requests.get(url)
tree = html.fromstring(r.content)

tree.xpath("//div@data-id=['any']")

标签： pythonhtmlcssxpathweb-scraping

解决方案

我试试这个...

from lxml import etree, html

doc = '<root><div class="specific-row" data-id="101736782"></div><div class="yellow-box-row" data-id="112376244"></div><div class="specific-row" data-id="179218312"></div><div class="vip-row" data-id="123749014"></div></root>'

root = etree.XML(doc) # EQUALS TO >>> root = html.fromstring(doc)

xpatheval = etree.XPathEvaluator(root)

divs = xpatheval('//div')
ids = [el.get('data-id') for el in divs]

## If you have installed cssselect you can do

divs = root.cssselect('[data-id]')
ids = [el.get('data-id') for el in divs]

# (cssselect) use the same schema of selection of 'some_element_node.querySelector("data-id")' of browsers

# Maybe this is what you are looking for -- https://lxml.de/tutorial.html#elementpath
root.findall('div[@data-id]')

我使用此链接来帮助我。

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