在选项卡之间切换并在窗口中关闭选项卡会出错答案

【问题标题】：Switching in between tabs and closing a tab in a window gives error在选项卡之间切换并在窗口中关闭选项卡会出错
【发布时间】：2016-01-04 18:51:57
【问题描述】：

她是我的代码基本上所做的（或者我正在尝试做的）。打开一个窗口，从页面打开一个链接，从页面获取一些数据并关闭选项卡。问题在于关闭选项卡。再次打开第二个链接并再次执行相同的操作。

  link.send_keys(Keys.CONTROL + 'w')
  File "C:\Python27\lib\site-packages\selenium\webdriver\remote\webelement.py", line 323, in send_keys
    self._execute(Command.SEND_KEYS_TO_ELEMENT, {'value': typing})
  File "C:\Python27\lib\site-packages\selenium\webdriver\remote\webelement.py", line 404, in _execute
    return self._parent.execute(command, params)
  File "C:\Python27\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 195, in execute
    self.error_handler.check_response(response)
  File "C:\Python27\lib\site-packages\selenium\webdriver\remote\errorhandler.py", line 170, in check_response
    raise exception_class(message, screen, stacktrace)
StaleElementReferenceException: Message: Element belongs to a different frame than the current one - switch to its containing frame to use it


from selenium import webdriver
from selenium.common.exceptions import NoSuchElementException
from selenium.webdriver.common.keys import Keys
import time
from lxml import html
import requests
import xlwt

browser = webdriver.Firefox() # Get local session of firefox

# 0 wait until the pages are loaded
browser.implicitly_wait(3) # 3 secs should be enough. if not, increase it

browser.get("http://ae.bizdirlib.com/taxonomy/term/1493") # Load page
links = browser.find_elements_by_css_selector("h2 > a")

def test():#test function
    elems = browser.find_elements_by_css_selector("div.content.clearfix > div > fieldset> div > ul > li > span")
    browser.implicitly_wait(3) # 3 secs should be enough. if not, increase it
    for elem in elems:
        print elem.text
    elem1 = browser.find_elements_by_css_selector("div.content.clearfix>div>fieldset>div>ul>li>a")
    browser.implicitly_wait(3) # 3 secs should be enough. if not, increase it
    for elems21 in elem1:
        print elems21.text
    return


for link in links:
    link.send_keys(Keys.CONTROL + Keys.RETURN)
    link.send_keys(Keys.CONTROL + Keys.PAGE_UP)
    browser.switch_to_window(browser.window_handles[-1])
    test() # Want to call test function
    browser.implicitly_wait(3) # 3 secs should be enough. if not, increase it
#    browser.quit()
    browser.switch_to_window(browser.window_handles[0])
    link.send_keys(Keys.CONTROL + 'w')
#    browser.switch_to_window(browser.window_handles[0])

【问题讨论】：

在哪个迭代中失败了？第一，第二，还有别的吗？
第二次迭代失败。在第一次迭代中，它打开一个选项卡并获取我想要的数据。当我想关闭选项卡并打开下一个链接时。我无法关闭它...
@PythonLearner - 我的回答对你有帮助吗？

标签： python python-2.7 selenium selenium-webdriver web-scraping

【解决方案1】：

switch_to_window 函数在您处理多个窗口和非选项卡时使用。因此，使用该功能是没有用的。根据link，到目前为止，Selenium 正式不支持标签
当您执行link.send_keys(Keys.CONTROL + 'w') 时，请注意link 元素不属于当前显示的选项卡。因此，您应该从当前选项卡中选择一个随机元素，然后调用send_keys 函数。

你的for应该是这样的：

for link in links:
    link.send_keys(Keys.CONTROL + Keys.RETURN)
    link.send_keys(Keys.CONTROL + Keys.PAGE_UP)
    test()

    #Here, 'r' is the random element
    r = browser.find_element_by_css_selector("h2 > a")
    r.send_keys(Keys.CONTROL + 'w')

【讨论】：