Question

Noob在这里：我有一个小脚本从用户Ebay产品列表中收集所有产品链接，然后逐个打开它们。它正确填充列表，它按预期打开第一个链接，等待一点然后返回上一页（产品列表）。

当尝试打开列表中的下一个链接时，它会崩溃，因为尽管列表仍包含相同数量的元素，但内容已更改：它不会保留任何链接。

我已经尝试过调试，试图通过使列表全局（IMO多余）来带来更多的持久性，但一切都无济于事。我已经检查过，并没有注意到有类似问题的人。

    from selenium import webdriver
    driver = webdriver.Chrome()
    driver.implicitly_wait(30)
    driver.maximize_window()
    # navigate to the application home page
    driver.get("http://www.ebay.de/sch/living_food/m.html/")
    # populate with the list of product links
    global link_name
    link_name=driver.find_elements_by_xpath(".//[@id='ListViewInner']/li/h3/a")

    def list_review():
        print "Found " + str(len(link_name)) + " products:"
        for link in link_name:
            print link.text
            linkproduct= link.get_attribute('href')
            print linkproduct
        print

    def open_product(link):
        print "Now testing: " + link.text
        linkproduct = link.get_attribute('href')
        print "with the link: " + linkproduct
        link.click()
        # driver.get(linkproduct)
        print "wait 2 seconds"
        driver.implicitly_wait(2)
        print "return to product list and perform a little health check"
        driver.back()
        print "The list has " + str(len(link_name)) + " elements"

    list_review()

    print "Let's open the links one by one"
    for link in link_name:
        open_product(link)
        print "We are back! Time for a list check! Still " + str(len(link_name)) + " elements"
        print "I've just done: " + link.text
        print

    driver.quit()

Answer 1

当您离开当前页面时，或者即使DOM被刷新，driver＆＃34;损失＆＃34;网页元素，你得到StaleElementReferenceException。

要迭代多个页面，您需要在每次迭代时重新定位列表，并且可以使用索引将您的位置保留在列表中

links_len = len(driver.find_elements_by_xpath(".//[@id='ListViewInner']/li/h3/a"))
for i in range(links_len):
    link_name = driver.find_elements_by_xpath(".//[@id='ListViewInner']/li/h3/a")
    open_product(link_name[i])
    print "We are back! Time for a list check! Still " + str(len(links_len)) + " elements"
    print "I've just done: " + link_name[i].text

使用Selenium访问页面后，变量的范围

1 个答案: