用于定位下拉菜单的 Web 元素的 XPath 表达式

Question

我有点沮丧，因为我在

<table>

HTML、

by.XPATH

和

following-sibling

中搜索了 Web 元素。但系统无法定位我的元素。

我想将标记为“[电子邮件受保护]”的电子邮件地址的下拉值从“标准”更改为“管理员”。

但是属性

ID

的值“角色”并不是唯一的。没有唯一的属性来定位元素。

表格看起来像这样（没有我可以搜索的唯一 ID 或名称：

    <tbody>             <tr id="0dca86a5-13d3-4ab5-a2e6-e75ab381dca9">
                    <td class="emailAddress">[email protected]</td>
                    <td class="role">
                    <form action="/echo/UserManagement/UpdateRole?userId=0dca86a5-13d3-4ab5-a2e6-e75ab381dca9&amp;accountReference=4711&amp;username=max%40max.com" method="post" novalidate="novalidate">
                        <div class="field-inline">
                        <select class="roles medium" id="role" name="role"><option value="Admin">Admin</option>
                            <option value="Standard">Standard</option>
                            <option selected="selected" value="Basic">Basic</option>
                            <option value="Template">Template</option>
                        </select>
                        </div>
                        <div class="field-inline">
                            <button class="button button-primary save" type="submit">Save</button>
                            <noscript>
                                <button class="button button-primary" type="submit">Save</button>
                            </noscript>
                        </div>
                    </form>
                    </td>
                    <td class="action">
                        <form action="/echo/UserManagement/RemoveUserFromAccount" method="post" novalidate="novalidate"><input id="userId" name="userId" type="hidden" value="0a23788b-0ed6-401b-a11e-8004d34acf1a"><input id="usernameToRemove" name="usernameToRemove" type="hidden" value="[email protected]">
                            <input id="accountReference" name="accountReference" type="hidden" value="4711">
                            <button type="submit" class="button button-danger remove_user" data-confirm="true">Remove</button>
                        </form>
                    </td>           </tr>           <tr id="e5b128b5-75f9-4002-bcd9-11c8bc891d49">
                    <td class="emailAddress">[email protected]</td>
                    <td class="role">
                    <form action="/echo/UserManagement/UpdateRole?userId=e5b128b5-75f9-4002-bcd9-11c8bc891d49&amp;accountReference=4711&amp;username=john%40john.com" method="post" novalidate="novalidate">
                        <div class="field-inline">
                        <select class="roles medium" id="role" name="role"><option selected="selected" value="Admin">Admin</option>
                            <option value="Standard">Standard</option>
                            <option value="Basic">Basic</option>
                            <option value="Template">Template</option>
                        </select>
                        </div>
                        <div class="field-inline">
                            <button class="button button-primary save" type="submit">Save</button>
                            <noscript>
                                <button class="button button-primary" type="submit">Save</button>
                            </noscript>
                        </div>
                    </form>                    
                    </td>
                    <td class="action">
                    <form action="/echo/UserManagement/RemoveUserFromAccount" method="post" novalidate="novalidate"><input id="userId" name="userId" type="hidden" value="f45a18fc-4903-4189-8cab-c158630373a3"><input id="usernameToRemove" name="usernameToRemove" type="hidden" value="[email protected]">
                        <input id="accountReference" name="accountReference" type="hidden" value="4711">
                        <button type="submit" class="button button-danger remove_user" data-confirm="true">Remove</button>
                    </form>    
                    </td>           </tr>           <tr id="5e356ca7-fa23-45a9-b7f3-c9e71ce5cb5f">
                    <td class="emailAddress">[email protected]</td>
                    <td class="role">
                    <form action="/echo/UserManagement/UpdateRole?userId=5e356ca7-fa23-45a9-b7f3-c9e71ce5cb5f&amp;accountReference=4711&amp;username=katja%40katja.com" method="post" novalidate="novalidate">
                        <div class="field-inline">
                        <select class="roles medium" id="role" name="role"><option value="Admin">Admin</option>
                            <option selected="selected" value="Standard">Standard</option>
                            <option value="Basic">Basic</option>
                            <option value="Template">Template</option>
                        </select>
                        </div>
                        <div class="field-inline">
                            <button class="button button-primary save" type="submit">Save</button>
                            <noscript>
                                <button class="button button-primary" type="submit">Save</button>
                            </noscript>
                        </div>
                    </form>
                    </td>
                    <td class="action">
                        <form action="/echo/UserManagement/RemoveUserFromAccount" method="post" novalidate="novalidate"><input id="userId" name="userId" type="hidden" value="1c094ceb-13a7-41cf-b754-921ac15dd9dc"><input id="usernameToRemove" name="usernameToRemove" type="hidden" value="[email protected]">
                            <input id="accountReference" name="accountReference" type="hidden" value="4711">
                            <button type="submit" class="button button-danger remove_user" data-confirm="true">Remove</button>
                        </form>
                    </td>           </tr> </tbody>

我的代码试验：

driver.find_element(By.XPATH, "//td[text()='[email protected]']/following-sibling::/form/select")

和

driver.find_element(By.XPATH, "//td[text()='[email protected]']/following-sibling::*[1]/form/select")

Answer 1

尝试以下 XPath 表达式：

(//form[contains(@action,'katja.com')]//following::select)[1]

说明： XPath 表达式选择任何

<select>

元素（其操作属性包含字符串“katja.com”）后面的第一个

<form>

元素。

代码应如下所示：

driver.find_element(By.XPATH, "(//form[contains(@action,'katja.com')]//following::select)[1]"))