Selenium单击一次，但是下一次单击将返回StaleElementReferenceException

问题描述

import sys
import urllib2
import time
from bs4 import BeautifulSoup
from selenium import webdriver
import string
import re

reload(sys)
sys.setdefaultencoding('utf8')

baseUrl = 'https://www.breastsurgeons.org/new_layout/membership/membersearch/index.php'

driver = webdriver.Chrome('/usr/local/Cellar/chromedriver/2.36/bin/chromedriver')
driver.get(baseUrl)
time.sleep(20)

for p in range(1,282):

    driver.find_element_by_xpath("//a[contains(text(),'>>')]").click()
    time.sleep(2)

driver.quit()

打开baseUrl后，我手动单击同意"，然后搜索要显示的医生列表.我想翻阅清单.现在，Selenium仅通过找到">>"来第一次单击.之后它停止并给出以下错误.

After opening the baseUrl, I manually click agree and then search for a list of physicians to show up. I want to flip through the listing. Right now Selenium only clicks the first time by finding ">>". After which it stops and gives following error.

   driver.find_element_by_xpath("//a[contains(text(),'>>')]").click()


  File "/Library/Python/2.7/site-packages/selenium-3.11.0-py2.7.egg/selenium/webdriver/remote/webelement.py", line 80, in click


    self._execute(Command.CLICK_ELEMENT)


  File "/Library/Python/2.7/site-packages/selenium-3.11.0-py2.7.egg/selenium/webdriver/remote/webelement.py", line 628, in _execute


    return self._parent.execute(command, params)


  File "/Library/Python/2.7/site-packages/selenium-3.11.0-py2.7.egg/selenium/webdriver/remote/webdriver.py", line 312, in execute


    self.error_handler.check_response(response)


  File "/Library/Python/2.7/site-packages/selenium-3.11.0-py2.7.egg/selenium/webdriver/remote/errorhandler.py", line 242, in check_response


    raise exception_class(message, screen, stacktrace)


selenium.common.exceptions.StaleElementReferenceException: Message: stale element reference: element is not attached to the page document

推荐答案

错误说明了一切:

selenium.common.exceptions.StaleElementReferenceException: Message: stale element reference: element is not attached to the page document

在程序中，您在for()循环内的页面上找到文本为>> 的<a>标签元素，并调用click()，由于click()事件， HTML DOM 更改.当您的程序第二次迭代for()循环时，也许未加载标识为driver.find_element_by_xpath("//a[contains(text(),'>>')]")的 WebElement ，但是 Selenium 尝试引用前一个搜索迭代已经过时的陈旧.因此，您会看到 StaleElementReferenceException .

In your program within the for() loop you are locating the <a> tag element with text as >> on a page and invoking click() and due to the click() event the HTML DOM changes. When your program iterates the for() loop for the second time perhaps the WebElement identified as driver.find_element_by_xpath("//a[contains(text(),'>>')]") doesn't gets loaded but Selenium tries to refer the search from the previous iteration which have already turned stale. Hence you see StaleElementReferenceException.

一种令人信服的页面迭代方式将是:

A convincing way to iterate the pages would be instead of :

driver.find_element_by_xpath("//a[contains(text(),'>>')]").click()

您可以诱导 WebDriverWait 与 expected_conditions 子句设置为页号(例如， 3 ， 4 ， 5 等)，可以点击，如下所示:

You can induce WebDriverWait in-conjunction with expected_conditions clause set to element_to_be_clickable for the WebElement with the particular Page Number (e.g. 3, 4, 5, etc) to be clickable as follows :

WebDriverWait(self.driver, 30).until(EC.element_to_be_clickable((By.XPATH, "//a[contains(text(),'3')]"))).click()

这篇关于Selenium单击一次，但是下一次单击将返回StaleElementReferenceException的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！