python selenium错误陈旧元素：元素未附加到页面文档

Question

我正在尝试从一个名为Correios的网站获取所有数据，在此网站中，我需要处理一些下拉菜单，这些菜单出现一些问题，例如：它无法从第一个下拉框信息中获取所有值。from selenium import webdriverfrom selenium.webdriver.support import expected_conditions as ECfrom selenium.webdriver.common.by import Byfrom selenium.webdriver.support.ui import WebDriverWaitfrom selenium.webdriver.support.select import Selectchrome_path = r"C:\\Users\\Gustavo\\Desktop\\geckodriver\\chromedriver.exe"driver = webdriver.Chrome(chrome_path)lista_x = []driver.get("http://www2.correios.com.br/sistemas/agencias/")driver.maximize_window()estado_select = Select(driver.find_element_by_id('estadoAgencia'))WebDriverWait(driver, 20).until(EC.presence_of_element_located((By.ID, 'municipioAgencia')))municipio_select = Select(driver.find_element_by_id('municipioAgencia'))for opt in estado_select.options:    print(opt.get_attribute('innerHTML'))    opt.click()    for opt2 in municipio_select.options:        print(opt.get_attribute('innerHTML'))        opt2.click()driver.close()有时我的代码运行正常，但有时却出现此错误：ACREACREALAGOASALAGOASTraceback (most recent call last):  File "C:\Users\Gustavo\Desktop\insper\trabalho\Correios3.py", line 23, in <module>    opt2.click()  File "C:\Users\Gustavo\AppData\Local\Programs\Python\Python36-32\lib\site-packages\selenium\webdriver\remote\webelement.py", line 80, in click    self._execute(Command.CLICK_ELEMENT)  File "C:\Users\Gustavo\AppData\Local\Programs\Python\Python36-32\lib\site-packages\selenium\webdriver\remote\webelement.py", line 628, in _execute    return self._parent.execute(command, params)  File "C:\Users\Gustavo\AppData\Local\Programs\Python\Python36-32\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 320, in execute    self.error_handler.check_response(response)  File "C:\Users\Gustavo\AppData\Local\Programs\Python\Python36-32\lib\site-packages\selenium\webdriver\remote\errorhandler.py", line 242, in check_response    raise exception_class(message, screen, stacktrace)我应该怎么办？