selenium.common.exceptions.NoSuchElementException：消息：无法定位元素 [id=""]

Question

我正在尝试获取输入标签并通过使用 selenium 使用 click()。

这是我的代码：

#Try many ways to fix the error
from selenium import webdriver
from webdriver_manager.firefox import GeckoDriverManager
from selenium.webdriver.common.by import By
from selenium.webdriver.support.select import Select 
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
import selenium.webdriver.support.ui as ui
import time

driver = webdriver.Firefox()
wait = ui.WebDriverWait(driver, 10)
driver.get("""https://www.gso.gov.vn/px-web-2/?pxid=V0641&theme=N%C3%B4ng%2C%20l%C3%A2m%20nghi%E1%BB%87p%20v%C3%A0%20th%E1%BB%A7y%20s%E1%BA%A3n""")
driver.maximize_window() # For maximizing window

time.sleep(10)
selectButton= driver.find_element(By.ID,'footer')
print("select button : ", selectButton)
print("select button : ", selectButton.text)


time.sleep(3)
driver.close()

它工作正常，这里输出：

select button :  <selenium.webdriver.firefox.webelement.FirefoxWebElement (session="e94aba42-01a7-467b-81b5-16ce0b95dad8", element="32699e02-2621-4090-be18-2dfeac33b1c2")>
select button :  TRANG THÔNG TIN ĐIỆN TỬ TỔNG CỤC THỐNG KÊ
Bản quyền thuộc Tổng cục Thống kê
Địa chỉ: 54 Nguyễn Chí Thanh, Đống Đa, Hà Nội
Điện thoại: 024 73046666, máy lẻ 8668
Email: banbientap@gso.gov.vn
Ghi rõ nguồn trang Thông tin điện tử Tổng cục Thống kê (www.gso.gov.vn) khi trích lại thông tin từ địa chỉ này

然后我通过将 id 字符串替换为以下内容来更改 selectButton：

selectButton= driver.find_element(By.ID,'ctl00_ContentPlaceHolderMain_VariableSelector1_VariableSelector1_VariableSelectorValueSelectRepeater_ctl01_VariableValueSelect_VariableValueSelect_SelectAllButton')

我得到了错误：

Traceback (most recent call last):
  File "crawl.py", line 17, in <module>
    selectButton= driver.find_element(By.ID,'ctl00_ContentPlaceHolderMain_VariableSelector1_VariableSelector1_VariableSelectorValueSelectRepeater_ctl01_VariableValueSelect_VariableValueSelect_SelectAllButton')
  File "/home/dongky/.local/lib/python3.8/site-packages/selenium/webdriver/remote/webdriver.py", line 976, in find_element
    return self.execute(Command.FIND_ELEMENT, {
  File "/home/dongky/.local/lib/python3.8/site-packages/selenium/webdriver/remote/webdriver.py", line 321, in execute
    self.error_handler.check_response(response)
  File "/home/dongky/.local/lib/python3.8/site-packages/selenium/webdriver/remote/errorhandler.py", line 242, in check_response
    raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.NoSuchElementException: Message: Unable to locate element: [id="ctl00_ContentPlaceHolderMain_VariableSelector1_VariableSelector1_VariableSelectorValueSelectRepeater_ctl01_VariableValueSelect_VariableValueSelect_SelectAllButton"]

不知为何，是网站结构有问题，还是id名称太长？感谢阅读！

Answer 1

您要查找的元素在 iframe 中。因此，我们必须更改驱动程序焦点才能与一个或多个期望元素交互：

iframe xpath :

//iframe[contains(@src, 'https://pxweb.gso.gov.vn/pxweb/vi')]

然后这样切换：

WebDriverWait(driver, 20).until(EC.frame_to_be_available_and_switch_to_it((By.XPATH,"//iframe[contains(@src, 'https://pxweb.gso.gov.vn/pxweb/vi')]")))

在此之后，您可以继续执行此操作：

selectButton= driver.find_element(By.ID,'ctl00_ContentPlaceHolderMain_VariableSelector1_VariableSelector1_VariableSelectorValueSelectRepeater_ctl01_VariableValueSelect_VariableValueSelect_SelectAllButton')

但我建议您使用更可靠的定位器来代替上述 ID。

进口：

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

selenium.common.exceptions.NoSuchElementException：消息：无法定位元素 [id=""]

selenium.common.exceptions.NoSuchElementException: Message: Unable to locate element [id=""]

selenium

webdriver

web-crawler