当使用Python和Selenium webdriver在页面之间导航时，有没有办法记住旧的DOM或状态？

Question

我在页面A上有一个课程列表，在单击某个课程的编辑后，它会将我带到页面B，在那里我会执行某些操作。单击“保存并返回”时，将返回到页面A，在那里我想要单击并编辑列表中的以下项目。问题是我丢失了列表上前一项的DOM或状态(不确定如何引用它)，这会导致我的循环中断，而不是转到下一项并执行必要的操作。

#iterate backup ul with each year and faculty
lists = ['2018-1','2017-1','2017-2','2016-2','2016-3']
faculties = ['FEA','FMSS','FNAHSW','FST','ODL']
for link_text in lists:
    link = driver.find_element_by_link_text(link_text)
    link.click()
    time.sleep(1)
    for facs in faculties:
        link = driver.find_element_by_link_text(facs)
        link.click()
        #check to see if faculties have courses
        if driver.find_element_by_class_name('dimmed').text != 0:
            #traverse course list
            resultSet = driver.find_element_by_class_name('course-list')
            options = resultSet.find_elements_by_tag_name("li")          
            #traverse and click each edit course button
            for option in options:
                time.sleep(3)
                option.find_element_by_class_name('action-edit').click()
                #inside edit page
                #convert to CAPS
                Inputelement = driver.find_element_by_id('id_fullname')
                time.sleep(1)
                String = Inputelement.get_attribute('value')
                time.sleep(1)
                Inputelement.send_keys(Keys.CONTROL + "a")
                Inputelement.send_keys(Keys.DELETE)
                time.sleep(1)
                Inputelement.send_keys(String.upper())
                #save and return
                driver.find_element_by_id('id_saveandreturn').click()

        else:
            print ('List has no courses')
        time.sleep(1)

Answer 1

欢迎来到SO。我建议在每次迭代中使用索引，而不是尝试访问以前存储的元素。如果您是指原始帖子(OP)中的选项，则将options列表更改为，如下所示。

# Get the number of options
options = driver.find_elements_by_xpath("//*[@class='course-list']/li")
# iterate through each option
for optionCounter in range(len(options)):
    # get the option here based on index
    option = driver.find_element_by_xpath("(//*[@class='course-list']/li)[" + str(optionCounter) + "]")
    # continue working with option from here