如何使用 selenium WebDriver 遍历每个下拉列表 python

How to traverse each dropdown list using selenium WebDriver python

我有如下带有 html 标签的网络结果,我需要循环每个值并从 table

中获取结果

<div class = "divList">
<select class="form selectList">
<option value="3710">Thu, 04 Nov 2021</option>
<option value="3709">Mon, 01 Nov 2021</option>
<option value="3708">Mon, 01 Nov 2021</option>
....
</select>
</div>

dropdownlist = driver.find_element_by_class_name('divList')
valueslist = (dropdownlist.text).splitlines()
print(valueslist)
sel = Select(driver.find_element_by_xpath("//select[@class='form selectList']"))
for value in valueslist:
   print(value)
   sel.select_by_visible_text(value)
   print('Processing - ', value)
   time.sleep(3)

在 2 次迭代后更改值时出现以下错误

Thu, 04 Nov 2021
Processing -  Thu, 04 Nov 2021
Mon, 01 Nov 2021
Processing -  Mon, 01 Nov 2021
Thu, 28 Oct 2021

selenium.common.exceptions.StaleElementReferenceException:消息:过时的元素引用:元素未附加到页面文档

试试这个:

dropdownlist = driver.find_element_by_class_name('divList')
valueslist = (dropdownlist.text).splitlines()
print(valueslist)
sel = Select(driver.find_element_by_xpath("//select[@class='form selectList']"))

for value in valueslist:
    sel = Select(driver.find_element_by_xpath("//select[@class='form selectList']"))
    sel.select_by_visible_text(value)
    print('Processing - ', value)
    time.sleep(3)

如果你愿意,你可以通过以下方式简化:

sel = Select(driver.find_element_by_xpath("//select[@class='form selectList']"))
nbritems = len(sel.options)
for i in range(0, nbritems):
    sel = Select(driver.find_element_by_xpath("//select[@class='form selectList']"))
    txt = sel.options[i].text
    sel.select_by_visible_text(txt)
    print('Processing - ', txt)
    time.sleep(3)

selenium.common.exceptions.StaleElementReferenceException:消息:过时的元素引用:元素未附加到页面文档

字面意思是,引用的元素已过期,不再附加到当前页面。通常,这是因为页面被刷新或跳过,解决方法是,重新使用 findElement 或 findElements 方法定位元素