Python & Selenium：遍历 WebElements 错误列表：StaleElementReferenceException

Question

下午好，

对 Python 和网页抓取有些新意，因此我们将不胜感激任何帮助！第一：

代码

from selenium import webdriver
import time 

chrome_path = r"/Users/ENTER/Desktop/chromedriver"

driver = webdriver.Chrome(chrome_path)

site_url = 'https://www.home-school.com/groups/'

driver.get(site_url)

# get state links from sidebar and store to list
area = driver.find_element_by_xpath("""/html/body/center/table/tbody/tr/td/table[3]/tbody/tr/td[2]/div""")
items = area.find_elements_by_tag_name('a')

# remove unneeded links
del items[:22]
del items[-1:]

# 
for links in items:
    # print(links.text)
    print(links.get_attribute("href"))
    # add link related logic here
    links.click()
    # you have to wait for the next element to display
    time.sleep(4)
    # assign html container with desired data to variable
    element = driver.find_element_by_xpath("""/html/body/center/table/tbody/tr/td/table[3]/tbody/tr/td[4]/div""")
    # Store container text in variable. We skip the first 5 lines of text as they 
    #  are unnecessary.
    orgdata = element.text.split("\n",5)[5]
    orgdata = orgdata.replace(' Edit Remove More', '').replace(' Edit Remove', '')
    # Write data to text file
    filepath = '/Users/ENTER/Documents/STEMBoard/Tiger Team/Lingo/' + links.text + '.txt'
    file_object = open(filepath, 'a')
    file_object.write(orgdata)

问题

我正在使用 Selenium 尝试将家庭学校团体的名称和信息从 http://home-school.com/groups/ 保存到每个州的单独文本文件中。

为此，我保存了一个链接列表，并希望遍历列表以单击每个链接，执行与抓取所需数据、处理文本以及输出到每个状态的单独文本文件相关的任务。

我在尝试执行“for”循环时收到StaleElementReferenceException: stale element reference: element is not attached to the page document。

我相信当它到达element = driver.find_element_by_xpath("""/html/body/center/table/tbody/tr/td/table[3]/tbody/tr/td[2]/div""") 时会出现错误。据我所知，这个 xpath 没有改变。我假设我需要让 webdriver 等待页面加载，因此 time.sleep(4)。

我确信这是一个简单的修复程序，当我看到它时会很有意义，但此刻我很难过。你们能提供的任何帮助都会很棒！谢谢！

Answer 1

试试看

from selenium import webdriver
import time 

chrome_path = r"/Users/ENTER/Desktop/chromedriver"

driver = webdriver.Chrome(chrome_path)

site_url = 'https://www.home-school.com/groups/'

driver.get(site_url)

# get state links from sidebar and store to list
area = driver.find_element_by_xpath("/html/body/center/table/tbody/tr/td/table[3]/tbody/tr/td[2]/div")
items = area.find_elements_by_tag_name('a')

# remove unneeded links
del items[:22]
del items[-1:]

text_list = [i.text for i in items]
items = [i.get_attribute("href") for i in items]

for i in range(len(items)):
    driver.get(items[i])
    # you have to wait for the next element to display
    time.sleep(2)
    # assign html container with desired data to variable
    element = driver.find_element_by_xpath("""/html/body/center/table/tbody/tr/td/table[3]/tbody/tr/td[2]/div""")
    # Store container text in variable. We skip the first 5 lines of text as they 
    #  are unnecessary.
    orgdata = element.text.split("\n",5)[5]
    orgdata = orgdata.replace(' Edit Remove More', '').replace(' Edit Remove', '')
    # Write data to text file
    filepath = '/Users/ENTER/Documents/STEMBoard/Tiger Team/Lingo/' + text_list[i] + '.txt'
    file_object = open(filepath, 'a')
    file_object.write(orgdata)
    file_object.close()