从selenium和python的optgroup中选择一个选项

Question

我想从这个optgroup中选择一个值，然后给我一个链接的下拉列表。在

<div class="searchbar">
    <select id="q" multiple="" tabindex="-1" class="select2-hidden-accessible" aria-hidden="true">
    <option></option>
    <option class="q-all-text" value="al:all">Search all text</option>

    <optgroup label="Business Type">
        <option value="bt:Buyer">Buyer</option>
        <option value="bt:Farmer/Rancher">Farmer/Rancher</option>
        <option value="bt:Farmers Market">Farmers Market</option>
        <option value="bt:Fishery">Fishery</option>
        <option value="bt:Food Bank">Food Bank</option>
    </optgroup>

以下是我目前为止的代码：

^{pr2}$

我要么得到一个元素不存在的异常，要么当我通过索引访问时，我得到一个ElementNotVisibleException，因为aria hidden属性为true。有什么办法吗？在

Answer 1

根据您共享的HTML打印所有选项，您必须诱导WebDriverWait切换到所需的帧，然后单击搜索框，使选项可见，如下所示：

• 区块代码：

  from selenium import webdriver
  from selenium.webdriver.chrome.options import Options
  from selenium.webdriver.support.ui import WebDriverWait
  from selenium.webdriver.support import expected_conditions as EC
  from selenium.webdriver.common.by import By
  
  options = Options()
  options.add_argument("start-maximized")
  options.add_argument("disable-infobars")
  options.add_argument(" disable-extensions")
  driver = webdriver.Chrome(chrome_options=options, executable_path=r'C:\Utility\BrowserDrivers\chromedriver.exe')
  driver.get("https://foodmarketmaker.com/main/mmsearch")
  WebDriverWait(driver, 10).until(EC.frame_to_be_available_and_switch_to_it((By.XPATH,"//iframe[@src='https://search.foodmarketmaker.com']")))
  WebDriverWait(driver, 20).until(EC.element_to_be_clickable((By.XPATH, "//div[@class='searchbar']//input[@class='select2-search__field' and @placeholder='start typing to search']"))).click()
  links = driver.find_elements_by_xpath("//li[@class='select2-results__option' and @aria-label='Business Type']/strong//following::ul[1]//li")
  for link in links:
      print(link.get_attribute('innerHTML'))
  

• 控制台输出：

  Buyer
  Buyer: Baked Goods
  Buyer: Beverages
  Buyer: Dairy
  Buyer: Fish & Seafood
  Buyer: Fruit & Nuts
  Buyer: Grains & OilSeed
  Buyer: Herbs
  Buyer: Meat & Poultry
  Buyer: Miscellaneous
  Buyer: Specialty Products
  Buyer: Sugar/Confectionary & Snacks
  Buyer: Vegetables
  Eating & Drinking Place
  Eating & Drinking Place: Cafeteria & Buffet
  Eating & Drinking Place: Caterer
  Eating & Drinking Place: Drinking Place
  Eating & Drinking Place: Food Service Contractor
  Eating & Drinking Place: Mobile Food Service
  Eating & Drinking Place: Restaurant
  Eating & Drinking Place: Snack & Nonalcoholic Beverage Bar
  Farmer/Rancher
  Farmer/Rancher: Dairy
  Farmer/Rancher: Forage
  Farmer/Rancher: Fruits & Nuts
  Farmer/Rancher: Grains
  Farmer/Rancher: Herbs
  Farmer/Rancher: Livestock Production (Beef Cattle)
  Farmer/Rancher: Meat & Poultry
  Farmer/Rancher: Specialty Products
  Farmer/Rancher: Vegetables
  Farmers Market
  Fishery
  Fishery: Fish/Shellfish/Seafood
  Food Bank
  Food Bank: Food Bank
  Food Hub
  Food Retailer
  Food Retailer: Baked Goods Store
  Food Retailer: Beer, Wine & Liquor Store
  Food Retailer: Candy, Nut & Confectionery
  Food Retailer: Fish Market
  Food Retailer: Fruit & Vegetable Market
  Food Retailer: Grocery/Convenience Store
  Food Retailer: Health Supplement Store
  Food Retailer: Meat & Poultry Market
  Food Retailer: Other Direct Selling Establishments
  Food Retailer: Other Specialty Food Store
  General Member
  Processor/Packing Shed
  Processor/Packing Shed: Animal Food Manufacturing
  Processor/Packing Shed: Bakery Products
  Processor/Packing Shed: Beverages
  Processor/Packing Shed: Dairy Products
  Processor/Packing Shed: Fish/Shellfish/Seafood Products
  Processor/Packing Shed: Fruit & Vegetable Products
  Processor/Packing Shed: Grain & Oilseed Milling
  Processor/Packing Shed: Meat & Poultry Products
  Processor/Packing Shed: Miscellaneous
  Processor/Packing Shed: Packing Shed
  Processor/Packing Shed: Sugar and Confectionery Products
  Tourism
  Tourism: Agritourism
  Tourism: Fishing Charter
  Tourism: Hunting
  Wholesaler
  Wholesaler: Beer, Wine & Alcoholic Beverages
  Wholesaler: Confectionery & Snacks
  Wholesaler: Dairy Products
  Wholesaler: Farm Products
  Wholesaler: Fish/Shellfish/Seafood
  Wholesaler: Fruit & Vegetable
  Wholesaler: General Grocery
  Wholesaler: Meat & Poultry
  Wholesaler: Other Grocery
  Wholesaler: Packaged Frozen Food
  Winery
  Winery: Blends or Generic Wine
  Winery: Fortified Wine
  Winery: Fruit Wine
  Winery: Other Wine Products
  Winery: Red Wine
  Winery: Sparkling Wine
  Winery: White Wine
  

Answer 2

select不是您需要处理的节点，因为它不可见。在

请尝试以下代码以获取所需的输出：

from selenium import webdriver as web
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 = web.Chrome('/path/to/chromedriver')
driver.get("https://foodmarketmaker.com/main/mmsearch")
iframe = driver.find_element_by_tag_name("iframe")
driver.switch_to.frame(iframe)

wait(driver, 10).until(EC.element_to_be_clickable((By.XPATH, '//section[@id="search-right"]//input[@placeholder="start typing to search"]'))).click()
wait(driver, 10).until(EC.element_to_be_clickable((By.XPATH, '//li[.="Bass"]'))).click()

links = wait(driver, 10).until(EC.presence_of_all_elements_located((By.XPATH, '//section[@id="search-results"]//a[.//*[name()="svg"]]')))

for link in links:
    print(link.get_attribute('href'))

另外，您需要将'//li[.="Bass"]'XPath中li节点的文本值替换为必需的选项