子选择元素按值不可能

Question

我尝试使用以下代码使用硒选择一个元素：

from selenium import webdriver
from selenium.webdriver.chrome.options import Options
from selenium.webdriver.chrome.service import Service
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import Select

print(f"Checking Browser driver...")
options = Options()
# options.add_argument('--headless=new')  
options.add_argument("start-maximized")
options.add_argument('--log-level=3')  
options.add_experimental_option("prefs", {"profile.default_content_setting_values.notifications": 1})    
options.add_experimental_option("excludeSwitches", ["enable-automation"])
options.add_experimental_option('excludeSwitches', ['enable-logging'])
options.add_experimental_option('useAutomationExtension', False)
options.add_argument('--disable-blink-features=AutomationControlled') 
srv=Service()
driver = webdriver.Chrome (service=srv, options=options)    
waitWD = WebDriverWait (driver, 10)         

startLlink = "https://www.firmenabc.at/bauen-wohnen-einrichten"
driver.get (startLlink)     
select = Select(driver.find_element(By.XPATH,'(//select[@class="py-4"])[1]'))
select.select_by_value('1')

但我一直会出现此错误：

(selenium) C:\DEVNEU\Fiverr2025\PROGRAMS\FirmenABC>python test.py
Checking Browser driver...
Traceback (most recent call last):
  File "C:\DEVNEU\Fiverr2025\PROGRAMS\FirmenABC\test.py", line 25, in <module>
    select.select_by_value('1')
    ~~~~~~~~~~~~~~~~~~~~~~^^^^^
  File "C:\DEVNEU\.venv\selenium\Lib\site-packages\selenium\webdriver\support\select.py", line 84, in select_by_value
    raise NoSuchElementException(f"Cannot locate option with value: {value}")
selenium.common.exceptions.NoSuchElementException: Message: Cannot locate option with value: 1; For documentation on this error, please visit: https://www.selenium.dev/documentation/webdriver/troubleshooting/errors#no-such-element-exception

，您可以看到这应该是第一个具有值=“ 1”

的元素

我如何使用硒选择第一个Opiton？

Answer 1

问题是选择选项需要片刻才能充分加载。我们可以通过自定义等待等待此操作，以确保选项数量大于1.

。

工程代码

from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.support import expected_conditions as EC
from selenium.webdriver.support.ui import Select
from selenium.webdriver.support.wait import WebDriverWait

driver = webdriver.Chrome()

url = "https://www.firmenabc.at/bauen-wohnen-einrichten"
driver.get(url)

wait = WebDriverWait(driver, 10)

# close cookie popup
wait.until(EC.element_to_be_clickable((By.ID, "CybotCookiebotDialogBodyButtonDecline"))).click()

select = Select(driver.find_element(By.XPATH, "//label[text()='Bundesland']//select"))
wait.until(lambda _ : len(select.options) > 1)
select.select_by_value("1")

driver.quit()