无法使用Selenium（Python）从Google下拉菜单中进行选择

Question

我正在尝试使用Python在Google的专利网站上自动搜索。这是一个链接到网站https://patents.google.com/advanced我需要弄清楚如何从下拉菜单中选择。例如，从专利局下拉菜单中，我需要选择美国作为国家/地区。

我尝试使用Selenium find_element_ by_xpath识别下拉菜单。根据本网站上的建议解决方案，我尝试使用Selenium select_by visible_text单击菜单。我没有成功。

我是Python和HTML的新手，所以任何线索都会非常感激。以下是我尝试过的Python代码，从专利局下拉列表中选择美国作为国家/地区。

#Identify the dropdown menu for Patent Office

off_element=driver.find_element_by_xpath("//dropdown-menu[@change-action='RESTRICT_OFFICE_MENU']/iron-dropdown/div[@id='contentWrapper']/div[@id='menu']/div[@class='style-scope dropdown-menu']")


#Declare the dropdown as an instance of the Select class.

    patoff= Select(off_element)
    patoff.selectByVisibleText("US")

这是我得到的错误

“UnexpectedTagNameException：消息：选择仅适用于选择元素，而不适用于div”

但是，我在html代码中看不到任何选择元素。我的xpath是不正确的？下拉列表不可见吗？下面我已经粘贴了下拉菜单的html代码。我不确定我应该提供多少细节，所以我复制了整个路径。国家名单位于最底层。谢谢！

<dropdown-menu show-label="true" multi="" label="Patent Office" change-action="RESTRICT_OFFICE_MENU" class="style-scope restrict-editor">

    <span class="label style-scope dropdown-menu">
      <span class="style-scope dropdown-menu">Patent Office</span>
      <span id="selected" class="style-scope dropdown-menu" hidden="">
        <span style="margin: 0px 4px 0px 2px" class="style-scope 
         dropdown-menu">·</span>
        <span class="style-scope dropdown-menu"></span>
      </span>
      <iron-icon icon="icons:arrow-drop-down" class="style-scope 
        dropdown-menu x-scope iron-icon-0"><svg viewBox="0 0 24 24" 
        preserveAspectRatio="xMidYMid meet" focusable="false" 
        class="style-scope iron-icon" style="pointer-events: none; 
        display: block; width: 100%; height: 100%;"><g class="style-          
        scope iron-icon"><path d="M7 10l5 5 5-5z" class="style-scope 
        iron-icon"></path></g></svg>    
  </iron-icon><iron-icon icon="icons:arrow-drop-up" class="style-scope 
    dropdown-menu x-scope iron-icon-0" hidden=""><svg viewBox="0 0 24 
    24" preserveAspectRatio="xMidYMid meet" focusable="false" 
    class="style-scope iron-icon" style="pointer-events: none; display: 
    block; width: 100%; height: 100%;"><g class="style-scope iron- 
    icon"><path d="M7 14l5-5 5 5z" class="style-scope iron-icon"> . 
    </path></g></svg>   
  </iron-icon>
    </span>
    <iron-dropdown allow-outside-scroll="" horizontal-align="left" 
     vertical-align="top" class="style-scope dropdown-menu" aria- 
     disabled="false" aria-hidden="true" style="outline: none; display: 
     none;"

    <div id="contentWrapper" class="style-scope iron-dropdown">
      <div class="dropdown-content style-scope dropdown-menu" 
         slot="dropdown-content" id="menu" multi="">
        <div class="style-scope dropdown-menu">

            <div class="item style-scope dropdown-menu">WO</div>

            <div class="item style-scope dropdown-menu">US</div>

            <div class="item style-scope dropdown-menu">EP</div>

            <div class="item style-scope dropdown-menu">JP</div>

            <div class="item style-scope dropdown-menu">KR</div>

            <div class="item style-scope dropdown-menu">CN</div>

            <div class="item style-scope dropdown-menu">AE</div>

Answer 1

以下代码适用于我，使用Chrome驱动程序：

import time

import urllib.request

import urllib.response

import re

from selenium import webdriver

from selenium.webdriver.common.keys import Keys

from selenium.webdriver.support.ui import WebDriverWait

from selenium.webdriver.support import expected_conditions as EC

from selenium.webdriver.common.by import By

from selenium.webdriver.support.select import Select

from selenium.webdriver.support.ui import Select

from selenium.webdriver.common.action_chains import ActionChains

import webbrowser

import requests, sys

import requests, csv

from lxml import html

import lxml.html

import requests

Chrome = webdriver.Chrome(executable_path='enter_your_driver_file_path_here')

url = "https://patents.google.com/advanced"

Chrome.get(url)

#Find Patent Office Menu.
patent_menu = Chrome.find_element_by_xpath("//*/span[@class='style-scope dropdown-menu' and text()='Patent Office']") 

#Open the Patent Office menu.
patent_menu.click() 

#Wait long enough for the patent menu to open, before selecting the country.
Chrome.implicitly_wait(10) 

#Find the patent country option, which in this case is the 'US'.
patent_country = Chrome.find_element_by_xpath("//*/div[@id='menu']/div[@class='style-scope dropdown-menu']/div[@class='item style-scope dropdown-menu' and text()='US']")

#Select the patent country option, which in this case is the 'US'.
patent_country.click()