selenium webdriver 无法从其 xpath 中找到元素，即使 xpath 是正确的

Question

我正在尝试使用 selenium webdriver 并使用 xpath 作为定位器来获取标签的属性。我将 xpath 提供给驱动程序，它返回 NoSuchElementException，但是当我在“检查元素”window 中输入 xpath 时，它显示了特定的标记，这意味着定位器确实存在。那么硒有什么问题呢？即使我给出完整的 xpath

，它仍然是一样的

from selenium import webdriver

driver = webdriver.Chrome('D:\chromedriver.exe')
driver.get('https://cq-portal.webomates.com/#/login')


element=driver.find_element_by_xpath("//button[@type='button']")
print(element.get_attribute('class'))

driver.quit()

selenium 版本 = 3.141.0

Answer 1

像你这样的循环缺少延迟。请试试这个：

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

driver = webdriver.Chrome('D:\chromedriver.exe')
wait = WebDriverWait(driver, 20)

driver.get('https://cq-portal.webomates.com/#/login')

wait.until(EC.visibility_of_element_located((By.XPATH, "//button[@type='button']")))

element=driver.find_element_by_xpath("//button[@type='button']")
print(element.get_attribute('class'))

driver.quit()

Answer 2

您只需稍等片刻即可加载页面。您的代码非常好。要么给硬编码等待，比如睡眠或元素的存在。两者都可以。

from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
from selenium import webdriver
driver = webdriver.Chrome(PATH)
driver.maximize_window()
wait = WebDriverWait(driver, 20)

driver.get('https://cq-portal.webomates.com/#/login')

wait.until(EC.presence_of_element_located((By.XPATH, "//button[@type='button']")))

element = driver.find_element(By.XPATH, "//button[@type='button']")
print(element.get_attribute('class'))

driver.quit()

输出：

btn btn-md btn-primary btn-block

selenium webdriver 无法从其 xpath 中找到元素，即使 xpath 是正确的

selenium webdriver unable to find element from its xpath even though the xpath is correct

xpath

python-3.x

selenium-webdriver