Question

我正在做一个有趣的副项目，以使网站https://10fastfingers.com/自动化，以便Selenium自动完成网站的所有成就。您可以在存储库中找到我当前的代码：https://github.com/jasperan/pyfastfingers

但是，我的登录页面遇到了问题：

https://10fastfingers.com/login

Selenium让我无法立即找到以下HTML标记，其相应的xpath值如下所示：

//*[@id="UserEmail"]

[//*[@id="UserPassword"]

该网站似乎第一次无法正确加载它们，因为即使我手动检查了它们（使用自己的Web客户端，Firefox，Chrome甚至Chromium，但由我自己启动...），我也会自动获得重定向到其祖父母：

/html/body

当我手动找到此元素后，在第二次检查后，我可以重定向到所需的电子邮件和密码元素。

但是，以编程方式，我无法做到这一点。无论我尝试定位元素多少次，都无法正确定位，每次都会抛出以下异常：

 File "pyfastfingers.py", line 112, in <module>
   main()
 File "pyfastfingers.py", line 100, in main
   do_login(driver)
 File "pyfastfingers.py", line 74, in do_login
   password = driver.find_element_by_xpath('[//*[@id="UserPassword"]')
 File "/home/j/.local/lib/python3.6/site-packages/selenium/webdriver/remote/webdriver.py", line 394, in find_element_by_xpath
   return self.find_element(by=By.XPATH, value=xpath)
 File "/home/j/.local/lib/python3.6/site-packages/selenium/webdriver/remote/webdriver.py", line 978, in find_element
   'value': value})['value']
 File "/home/j/.local/lib/python3.6/site-packages/selenium/webdriver/remote/webdriver.py", line 321, in execute
   self.error_handler.check_response(response)
 File "/home/j/.local/lib/python3.6/site-packages/selenium/webdriver/remote/errorhandler.py", line 242, in check_response
   raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.InvalidSelectorException: Message: invalid selector: Unable to locate an element with the xpath expression [//*[@id="UserPassword"] because of the following error:
SyntaxError: Failed to execute 'evaluate' on 'Document': The string '[//*[@id="UserPassword"]' is not a valid XPath expression.
 (Session info: chrome=74.0.3729.169)
 (Driver info: chromedriver=74.0.3729.6 (255758eccf3d244491b8a1317aa76e1ce10d57e9-refs/branch-heads/3729@{#29}),platform=Linux 4.18.0-21-generic x86_64)

以下是与我的登录功能相对应的一些代码：

    driver.get('https://10fastfingers.com/login')

    placeholder = driver.find_element_by_xpath('/html/body')
    email = driver.find_element_by_xpath('//*[@id="UserEmail"]')
    password = driver.find_element_by_xpath('[//*[@id="UserPassword"]')
    email.send_keys(os.environ['FINGERS_EMAIL'])
    password.send_keys(os.environ['FINGERS_PASSWORD'])
    login_button = driver.find_element_by_id('login-form-submit')
    login_button.click()
    # Login complete

您可以在我的存储库中找到完整的代码。

Answer 1

问题出在

driver.find_element_by_xpath('[//*[@id="UserPassword"]')

删除xpath中的第一个'['。

driver.find_element_by_xpath('//*[@id="UserPassword"]')

Answer 2

您是否尝试过等待功能。

wait = WebDriverWait(driver, 10)
men_menu = wait.until(ec.visibility_of_element_located((By.XPATH, "//*[@id="UserPassword"]")))

Answer 3

您的问题是xpath表达式：

[//*[@id="UserPassword"]

应为：

//*[@id="UserPassword"]

但是看起来您可以使用.find_element_by_id代替.find_element_by_xpath，看起来更好。

driver.get('https://10fastfingers.com/login')

email = WebDriverWait(driver, 20).until(EC.visibility_of_element_located((By.ID, 'UserEmail')))
email.send_keys(os.environ['FINGERS_EMAIL'])

password = driver.find_element_by_id('UserPassword')
login_button = driver.find_element_by_id('login-form-submit')

password.send_keys(os.environ['FINGERS_PASSWORD'])
login_button.click()

正在导入：

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

硒-找不到网站中100％存在的元素

3 个答案: