Selenium求助：定位表格中无ID的特定Delete按钮

问题场景 #

需要定位表格中与katja@katja.com对应的Delete按钮，该按钮无唯一ID标识，表格HTML结构如下：

<tr id="0dca11a5-11d3-4ab5-a255-e55ab331dc19">
   <td class="emailAdress">max@max.com</td>
   <td class="action">
      <form action="RemoveUserFromAccount" method="post">
         <input id="usernameToRemove" name="usernameToRemove" value="max@max.com">
         <button type="submit" class="button button-danger remove_user">Delete</button>
      </form>
   </td>
</tr>
<tr id="e5b111b5-71e9-4272-bcd9-11c8fe831a49">
   <td class="emailAdress">john@john.com</td>
   <td class="action">
      <form action="RemoveUserFromAccount" method="post">
         <input id="usernameToRemove" name="usernameToRemove" value="john@john.com">
         <button type="submit" class="button button-danger remove_user">Delete</button>
      </form>
   </td>
</tr>
<tr id="a50d080c-6ed1-480f-b92f-6576fe3e6549">
   <td class="emailAdress">katja@katja.com</td>
   <td class="action">
      <form action="RemoveUserFromAccount" method="post">
         <input id="usernameToRemove" name="usernameToRemove" value="katja@katja.com">
         <button type="submit" class="button button-danger remove_user">Delete</button>
      </form>
   </td>
</tr>

你之前代码的问题 #

• 第一段代码仅定位到了邮箱所在的<td>元素，并非目标Delete按钮
• 第二段XPATH语法错误，正确的contains写法应为//*[contains(text(),'katja@katja.com')]（你多写了一个闭合方括号，且语法结构错误）
• 第三段代码语法错误，By.XPATH需传入字符串参数，正确格式为driver.find_element(By.XPATH, "//*[text()='katja@katja.com']")；且获取父元素应使用相对定位而非get_attribute('parentElement')

正确的定位方法 #

方法1：通过邮箱td的兄弟节点定位 #

利用XPATH的兄弟节点定位语法，先找到邮箱对应的td，再定位其右侧action列中的Delete按钮：

from selenium.webdriver.common.by import By

button = driver.find_element(By.XPATH, "//td[text()='katja@katja.com']/following-sibling::td[@class='action']//button[text()='Delete']")
button.click()

方法2：通过表单内的input值定位 #

表单内的input元素value属性与邮箱一致，可通过该input定位同级的Delete按钮：

from selenium.webdriver.common.by import By

button = driver.find_element(By.XPATH, "//input[@value='katja@katja.com']/following-sibling::button[text()='Delete']")
button.click()

方法3：通过父级tr元素定位 #

先找到包含目标邮箱的<tr>行，再在该行内定位Delete按钮：

from selenium.webdriver.common.by import By

button = driver.find_element(By.XPATH, "//tr[td/text()='katja@katja.com']//button[text()='Delete']")
button.click()

内容的提问来源于stack exchange，提问作者SirACEair