消息：过时的元素引用：使用 Selenium Python 单击网页上的多个链接时，元素未附加到页面文档

Question

我正在尝试单击此 page 上所有可能的课程链接，但它给了我这个错误：

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

这是我的代码：

driver = webdriver.Chrome()
driver.get('https://catalog.maryville.edu/preview_program.php?catoid=18&poid=3085&_ga=2.22513656.232086776.1594848572-196623372.1594848572')
driver.implicitly_wait(10)
links = driver.find_elements_by_xpath('//*[@id="table_block_n2_and_content_wrapper"]/table/tbody/tr[2]/td[1]/table/tbody/tr/td/table/tbody/tr[2]/td/div/div/ul/li/span/a')

for link in links:
    driver.execute_script("arguments[0].click();", link)
    time.sleep(3)
driver.quit()

知道如何解决这个问题吗？

Answer 1

要点击页面https://catalog.maryville.edu/preview_program.php?catoid=18&poid=3085&_ga=2.22513656.232086776.1594848572-196623372.1594848572上的所有课程链接，您可以使用以下任一Locator Strategies：

• 使用CSS_SELECTOR：

  driver.get("https://catalog.maryville.edu/preview_program.php?catoid=18&poid=3085&_ga=2.22513656.232086776.1594848572-196623372.1594848572")
  links = WebDriverWait(driver, 20).until(EC.visibility_of_all_elements_located((By.CSS_SELECTOR, "li.acalog-course>span>a")))
  for link in links:
      link.click()
      time.sleep(3)
  driver.quit()
  

• 使用XPATH：

  driver.get("https://catalog.maryville.edu/preview_program.php?catoid=18&poid=3085&_ga=2.22513656.232086776.1594848572-196623372.1594848572")
  links = WebDriverWait(driver, 20).until(EC.visibility_of_all_elements_located((By.XPATH, "//li[@class='acalog-course']/span/a")))
  for link in links:
      link.click()
      time.sleep(3)
  driver.quit()
  

• 注意：您必须添加以下导入：

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

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参考

您可以在StaleElementReferenceException找到相关的详细讨论：

• StaleElementException when iterating with Python
• Message: stale element reference: element is not attached to the page document in Python