Selenium 无法按名称或 ID 找到元素（python）
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Selenium can't find element by name or id (python)
提问by Gal Bar-nahum
from selenium import webdriver
import os
from selenium.webdriver import chrome
driver = webdriver.Chrome()
driver.get("http://nmcunited.me.showenter.com/%D7%9C%D7%94-%D7%9C%D7%94-%D7%9C%D7%A0%D7%93.html")
driver.implicitly_wait(15)
christmasTag = driver.find_element_by_id('f_2561406_1')
christsmasTag.click()
driver.close()
I used the python code above in order to practice on some basic Selenium operations. I couldn't find any element, neither by name nor by id. No matter what I tried I always got the same error, which stated that the element I'm looking for doesn't exist. (the idea was to press one of the buttons, if it matters...)
我使用上面的 python 代码来练习一些基本的 Selenium 操作。我找不到任何元素，无论是按名称还是按 id。无论我尝试什么，我总是得到同样的错误，它表明我正在寻找的元素不存在。（这个想法是按下其中一个按钮，如果重要的话......）
This is a part of the html code of the website:
这是网站html代码的一部分：
<!-- main page -->
<td
valign="top">
<table width="100%" cellspacing="0" cellpadding="0" border="0">
<!-- Page Content -->
<!-- Page Content -->
<tr>
<td valign="top">
<table border="0" width="100%" cellpadding="3" cellspacing="0">
<tr>
<!-- the form -->
<td valign="top">
<form id="form2" name="form2" method="post" action="/site/form/sendForm.asp" OnSubmit="return CheckSubmit();" enctype="multipart/form-data">
<!-- Form Field List -->
<table id='sop_form_594602' class='sop_all_form' align="center" border="0" width="100%" cellpadding="3" cellspacing="0"
>
<tr>
<td style="color:;" class="changeText14">
<span style="font-weight:bold;">????? ?? ????? ???? ????????</span><br>
<input type="radio" name="f_2561406" id="f_2561406_0" value="1. ?? ?????" class="rachbox" checked>
<label for="f_2561406_0">1. ?? ?????</label>
<br>
<input type="radio" name="f_2561406" id="f_2561406_1" value="2. ?? ?????" class="rachbox">
<label for="f_2561406_1">2. ?? ?????</label>
<br>
<input type="radio" name="f_2561406" id="f_2561406_2" value="3. ???????" class="rachbox">
<label for="f_2561406_2">3. ???????</label>
<br>
<input type="radio" name="f_2561406" id="f_2561406_3" value="4. ?? ??? ????" class="rachbox">
<label for="f_2561406_3">4. ?? ??? ????</label>
<br>
</td>
</tr>
this is the said website(broken link)
这是上述网站（断开的链接）
Any help will be appreciated.
任何帮助将不胜感激。
By the way, this is the first program that uses Selenium I'm trying to run, is there any possibility that i need to change some settings or that i need to install something else?
顺便说一句，这是我尝试运行的第一个使用 Selenium 的程序，是否有可能我需要更改某些设置或需要安装其他东西？
回答by Lucas Tierney
The items you are trying to find are inside of an iframe. You need to switch the context of the webdriver to the frame first.
您要查找的项目位于 iframe 内。您需要先将 webdriver 的上下文切换到框架。
from selenium import webdriver
import os
from selenium.webdriver import chrome
driver = webdriver.Chrome()
driver.get("http://nmcunited.me.showenter.com/%D7%9C%D7%94-%D7%9C%D7%94-%D7%9C%D7%A0%D7%93.html")
driver.implicitly_wait(15)
frame = driver.find_element_by_css_selector('div.tool_forms iframe')
driver.switch_to.frame(frame)
christmasTag = driver.find_element_by_id('f_2561406_1')
christmasTag.click()
driver.close()
回答by SVS
Verify whether the "id" is getting changed and generated dynamically by refreshing the page, if it is the case then use the below xPath to find the element:
通过刷新页面验证“id”是否正在更改和动态生成，如果是，则使用以下 xPath 查找元素：
"//input[@value='2. ?? ?????']"
