在运行脚本的页面上查找 xpath [英] Finding xpaths on pages running script

问题描述

我正在尝试使用 selenium 抓取网页.通过检查页面并右键单击建议的 xpath 属于不稳定类型 (/html/body/table[2]/tbody/tr[1]/td/form/table/tbody/tr[2]) .所以我尝试了以下解决方案:

Im trying to scrape a webpage using selenium. The xpaths suggested by inspecting the page and right clicking are of an unstable kind (/html/body/table[2]/tbody/tr[1]/td/form/table/tbody/tr[2]) . So I tried the following solution instead:

driver = webdriver.Chrome("path")
driver.get("https://www.bundesfinanzhof.de/entscheidungen/entscheidungen-online")
time.sleep(1)
links=driver.find_element_by_xpath('//tr[@class="SuchForm"]')

甚至

links=driver.find_elements_by_xpath('//*[@class="SuchForm"]')

不返回任何结果.但是在页面的早期我可以获得:

don't return any results. However earlier on in the page I can obtain:

links=driver.find_element_by_xpath('//iframe')
links.get_attribute('src')

似乎在之后:

<script language="JavaScript" src="/rechtsprechung/jscript/list.js" type="text/javascript"></script>

我无法再访问任何元素.如何确定正确的 XPath?表明脚本中的部分无法解析.然而，我所追求的道路在我看来并不在一条道路内.我是否误解了脚本在页面上的工作方式?

I can no longer get to any of the elements. How do I determine the correct XPath? suggests that parts within a script are impossible to parse. However, the path I am after seems to me not to be within a path. Am I misinterpretting how scripts work on a page ?

例如，后面有一条路径:

For instance, later on there is a path:

/html/body/table[2]/tbody/tr[1]/td/script

我希望这会造成这样的问题.我绝不是程序员，所以我对这个主题的理解是有限的.有人能解释一下问题是什么吗?如果可能的话，有解决方案吗?

I would expect this to create such a problem. I am by no means a programmer, so my understanding of this subject is limited. Can someone explain what the problem is and if possible a solution ?

尝试使用以下解决方案:

Attempted using solutions from:

在 selenium-python 中使用 xpath 查找元素文本不工作

xpath 不适用于此站点，请验证

推荐答案

table 位于 iframe 内，所以你需要切换到那个 iframe 在处理所需的 tr 之前:

The table is located inside an iframe, so you need to switch to that iframe before handling required tr:

from selenium.webdriver.support.ui import WebDriverWait as wait
from selenium.webdriver.support import expected_conditions as EC
from selenium.webdriver.common.by import By

driver.get("https://www.bundesfinanzhof.de/entscheidungen/entscheidungen-online")
wait(driver, 10).until(EC.frame_to_be_available_and_switch_to_it((By.XPATH,"//iframe[@src='https://juris.bundesfinanzhof.de/cgi-bin/rechtsprechung/list.py?Gericht=bfh&Art=en']")))
link = driver.find_element_by_xpath('//tr[@class="SuchForm"]')

使用driver.switch_to.default_content()从iframe

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