Selenium-使用Element.click()时出现失效元素引用异常

Question

错误输出：

selenium.common.exceptions.StaleElementReferenceException: Message: The element reference of <span class="a-size-medium a-color-base a-text-normal"> is stale; either 
the element is no longer attached to the DOM, it is not in the current frame context, or the document has been refreshed

我试着用硒做以下事情：

1. 去亚马逊
2. 用python搜索自动化无聊的东西
3. 单击第一个产品标题
4. 如果价格标签元素在产品网站上，请打印它，然后返回上一页
5. 如果不可用，请返回上一页
6. 转到下一个产品标题，从步骤4开始重复

但是在click()上失败

代码：

def experiment2():
browser = webdriver.Firefox()
browser.get("https://www.amazon.com/")
searchelement = browser.find_element_by_css_selector("#twotabsearchtextbox")
searchelement.send_keys('automate the boring stuff with python')
searchelement.submit()
time.sleep(5)
elements = browser.find_elements_by_css_selector("span.a-color-base.a-text-normal")
for element in elements:
element.click()
try:
element = browser.find_element_by_css_selector("span.a-size-medium:nth-child(2)")
print(element.text)
except:
browser.back()
time.sleep(2)
continue
browser.back()
time.sleep(2)

是什么原因导致了这个问题？

Answer 1

由于您使用driver.back((，它刷新了页面，并且您捕获的元素不再附加到页面。您需要重新分配这些元素。

尝试以下代码

def experiment2():
browser = webdriver.Firefox()
browser.get("https://www.amazon.com/")
searchelement = browser.find_element_by_css_selector("#twotabsearchtextbox")
searchelement.send_keys('automate the boring stuff with python')
searchelement.submit()
time.sleep(5)
elements = browser.find_elements_by_css_selector("span.a-color-base.a-text-normal")
for element in range(len(elements)):
elements = browser.find_elements_by_css_selector("span.a-color-base.a-text-normal")
elements[element].click()
try:
element = browser.find_element_by_css_selector("span.a-size-medium:nth-child(2)")
print(element.text)
except:
browser.back()
time.sleep(2)
continue
browser.back()
time.sleep(2)