没有这样的窗口：目标窗口已经关闭

Question

我有一个网页，其中包含一些内容，而我拥有一个具有某些价值的Excel。我正在尝试在页面中查找元素（Excel值），如果找到它，则必须单击该另一循环到下一个元素。切换到main（Parent）Window时，一切都很好，直到第一行，我得到的异常是：

File "C:/Users/tmou/PycharmProjects/Python/WebScraping/ST.py", line 47, in <module>
    if driver.find_elements_by_xpath(xpath):
  File "C:\Users\tmou\AppData\Local\Programs\Python\Python37-32\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 410, in find_elements_by_xpath
    return self.find_elements(by=By.XPATH, value=xpath)
  File "C:\Users\tmou\AppData\Local\Programs\Python\Python37-32\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 1007, in find_elements
    'value': value})['value'] or []
  File "C:\Users\tmou\AppData\Local\Programs\Python\Python37-32\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 321, in execute
    self.error_handler.check_response(response)
  File "C:\Users\tmou\AppData\Local\Programs\Python\Python37-32\lib\site-packages\selenium\webdriver\remote\errorhandler.py", line 242, in check_response
    raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.NoSuchWindowException: Message: no such window: target window already closed
from unknown error: web view not found

但是直到循环（excel）完成，我的网页才关闭。

for c in range(sheet.ncols):
    for r in range(sheet.nrows):
        st = (sheet.cell_value(r, c))
        #print(st)

        xpath = "//input[@value='Analyze' and contains(@onclick,'" + st + "')]"
        if driver.find_elements_by_xpath(xpath):
            driver.find_element_by_xpath(xpath).click()  # Here new window will open
            time.sleep(2)
            #Main_Window = driver.current_window_handle
            handles = driver.window_handles
            h = len(handles)  # h=2
            for handle in range(1, h):
                # for handle in range(h):

                driver.switch_to.window(handles[handle])
                driver.find_element_by_xpath(
                    '/html/body/table/tbody/tr[4]/td/table/tbody/tr[9]/td[3]/input').click()
                #time.sleep(2)
                driver.close()

                lst_window = driver.window_handles
                h2 = len(lst_window)  # h2=2


                #for lst_handle in range(2, h2):
                for lst_handle in range(1,h2):
                    driver.switch_to.window(lst_window[lst_handle])
                    xpath2 = "//*[@id='create_button']"
                    xpath3 = "//*[@id='update_button']"
                    if check_exists_by_xpath(xpath2):
                        driver.find_element_by_xpath(xpath2).click()
                        driver.close()
                        driver.switch_to.default_content()
                     elif check_exists_by_xpath(xpath3):
                        driver.find_element_by_xpath(xpath3).click()
                        driver.close()