Python＆amp; Selenium：如何避免ratidend.com中的staleelementReementReferenceException错误

Question

我想从与Python＆amp;硒。

但是在打印了某些公司名称后显示以下错误。

StaleElementReferenceException：消息：陈旧元素参考：页面文档未连接元素

如何避免此错误？

奇怪的是，在发生此错误之前，要打印一些公司名称。

如果您能给我一些暗示，这将不胜感激。

python

driver.get('https://www.dividend.com/dividend-champions/')
companies = driver.find_elements(by=By.CLASS_NAME, value="m-table-long-name")
print(len(companies)) #30
for company in companies:
  print(company.text)

Answer 1

StaleElementReferenceException 表示所选元素可能不再在HTML DOM中。因此，您需要使用 WebDriverWait 。

from selenium import webdriver
from selenium.webdriver.chrome.service import Service
from webdriver_manager.chrome import ChromeDriverManager

from selenium.webdriver.chrome.options import Options

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


option = webdriver.ChromeOptions()
option.add_argument("start-maximized")

#chrome to stay open
option.add_experimental_option("detach", True)

driver = webdriver.Chrome(service=Service(ChromeDriverManager().install()),options=option)
driver.get('https://www.dividend.com/dividend-champions/')


names = WebDriverWait(driver, 20).until(EC.visibility_of_all_elements_located((By.XPATH, '//*[@class="mp-table-body"]/div[@class="mp-table-body-row-container mp-table-row t-static"]')))

for name in names:
    company = name.find_element(By.XPATH,'.//a[@class="m-table-body-link-text m-table-stocks-name-col m-table-long-name"]').text
    print(company)

输出：

Eversource Energy
Andersons Inc.
J.M. Smucker Co.
Cambridge Bancorp
Factset Research Systems Inc.
Graco Inc.
First Of Long Island Corp.
Stepan Co.
MDU Resources Group Inc
W. P. Carey Inc
Church & Dwight Co., Inc.
Lincoln Electric Holdings, Inc.
Matthews International Corp. - Ordinary Shares - Class A
New Jersey Resources Corporation
Bank OZK
Caterpillar Inc.
Brown & Brown, Inc.
Carrier Global Corp
Polaris Inc
International Business Machines Corp.
NextEra Energy Inc
Realty Income Corp.
RenaissanceRe Holdings Ltd
Cullen Frost Bankers Inc.
Otis Worldwide Corp
Roper Technologies Inc
West Pharmaceutical Services, Inc.
Bancfirst Corp.
Albemarle Corp.
Aptargroup Inc.

webdrivermanager