For 循环中的 Python/Selenium 陈旧元素参考

Question

我在循环浏览公司 ID 列表并在搜索栏中使用它们时遇到问题。当文本文件只包含一个 ID 时，我的代码工作得很好，但是当我将第二个 ID 添加到列表中时，它甚至不会对第一个 ID 执行最后一次单击，更不用说搜索第二个 ID，然后给我过时的元素引用异常。这让我发疯，所以任何帮助都会令人惊叹。我完全没有经验，所以如果我不理解有关更多信息或您的解决方案的请求，请多多包涵。

代码：

company_list = open('Company_List.txt')
for line in company_list:
  company_id = driver.find_element_by_xpath('//*[@id="SearchTopBar"]')
  company_id.send_keys(line)
  company_id.send_keys(Keys.ENTER)
  driver.implicitly_wait(10)
  driver.find_element_by_xpath('//*[@id="CompanyHeaderInfo_TearSheetReport_ReportImage"]/div/img').click()
  driver.implicitly_wait(10)

追溯：

File "<ipython-input-5-3766dfd38c2f>", line 1, in <module>
runfile('C:/Users/kdixon/Desktop/Business_Intelligence/PROJECTS/Scripts/Pull Tearsheets.py', wdir='C:/Users/kdixon/Desktop/Business_Intelligence/PROJECTS/Scripts')

File "C:\Users\kdixon\AppData\Local\Continuum\anaconda3\lib\site-packages\spyder\utils\site\sitecustomize.py", line 705, in runfile
execfile(filename, namespace)

File "C:\Users\kdixon\AppData\Local\Continuum\anaconda3\lib\site-packages\spyder\utils\site\sitecustomize.py", line 102, in execfile
exec(compile(f.read(), filename, 'exec'), namespace)

File "C:/Users/kdixon/Desktop/Business_Intelligence/PROJECTS/Scripts/Pull Tearsheets.py", line 42, in <module>
company_id.send_keys(Keys.ENTER)

File "C:\Users\kdixon\AppData\Local\Continuum\anaconda3\lib\site-packages\selenium\webdriver\remote\webelement.py", line 479, in send_keys
'value': keys_to_typing(value)})

File "C:\Users\kdixon\AppData\Local\Continuum\anaconda3\lib\site-packages\selenium\webdriver\remote\webelement.py", line 628, in _execute
return self._parent.execute(command, params)

File "C:\Users\kdixon\AppData\Local\Continuum\anaconda3\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 314, in execute
self.error_handler.check_response(response)

File "C:\Users\kdixon\AppData\Local\Continuum\anaconda3\lib\site-packages\selenium\webdriver\remote\errorhandler.py", line 242, in check_response
raise exception_class(message, screen, stacktrace)

StaleElementReferenceException: stale element reference: element is not attached to the page document

(Session info: chrome=67.0.3396.99)
(Driver info: chromedriver=2.40.565498 (ea082db3280dd6843ebfb08a625e3eb905c4f5ab),platform=Windows NT 10.0.16299 x86_64)

Answer 1

根据回溯，特别是从company_id.send_keys(Keys.ENTER)行抛出异常的事实以及异常的类型，似乎搜索框（id为SearchTopBar）在您开始时被另一个元素替换打字。

我猜如果您将 Enter 键 一起发送 和值，它会解决问题。即：

company_id.send_keys(line + Keys.ENTER)

如果没有，请在浏览器中打开开发人员工具，然后在您开始输入时查看哪个元素替换了 SearchTopBar 元素。在代码中，将line 击键发送到company_id 元素后，搜索您找到的替换它的元素，然后将Enter 键发送到该元素而不是company_id。

Answer 2

试试这个：

from selenium.webdriver.support import expected_conditions as EC
from selenium.webdriver.support.ui import WebDriverWait

company_id = WebDriverWait(driver, 10).until(
    EC.presence_of_element_located((By.XPATH, "//*[@id='SearchTopBar']"))
)

它会等到元素出现在 DOM 中

完整代码：

from selenium.webdriver.support import expected_conditions as EC
from selenium.webdriver.support.ui import WebDriverWait

company_list = open('Company_List.txt')
for line in company_list:
  company_id = WebDriverWait(driver, 10).until(EC.presence_of_element_located((By.XPATH, "//*[@id='SearchTopBar']")))
  company_id.send_keys(line)
  company_id.send_keys(Keys.ENTER)
  driver.implicitly_wait(10)
  driver.find_element_by_xpath('//*[@id="CompanyHeaderInfo_TearSheetReport_ReportImage"]/div/img').click()
  driver.implicitly_wait(10)