如何单击 shadow-root 元素内的按钮？

如何解决如何单击 shadow-root 元素内的按钮？

在我们在加泰罗尼亚的网站上获取 Covid-19 疫苗非常烦人，每次您想检查是否有可用的中心时，都必须介绍您的个人信息和 SMS 代码。

自从我学习 Python 以来，我正在尝试自动化该过程，第一步是单击主页上的按钮。但是，该按钮位于许多 shadow-root 元素中。

我之前做过一项研究，寻找类似的问题，并尝试了一些代码，但没有用。

这是我的代码：

from selenium.webdriver import Firefox
import time

# Define the driver
driver = Firefox(executable_path='C:/Users/Alexis/AppData/Local/Programs/Python/Python39/Tools/geckodriver.exe')

# Helper for getting the shadow root of a shadow host
def getShadowRoot(host):
    shadow_root = driver.execute_script("return arguments[0].shadowRoot",host)
    return shadow_root

# Open the browser and load the website (vacunacovidsalut.cat)
driver.get('http://vacunacovidsalut.cat/')

# Give browser some time to load all website elements
time.sleep(5)

# Get the button we need to click
host1 = driver.find_element_by_tag_name('vaccinapp-app')
root1 = getShadowRoot(host1)

host2 = driver.find_element_by_tag_name('vaccinapp-shell')
root2 = getShadowRoot(host2)

host3 = driver.find_element_by_tag_name('appointment-shell')
root3 = getShadowRoot(host3)

host4 = driver.find_element_by_tag_name('appointment-onboarding')
root4 = getShadowRoot(host4)

host5 = driver.find_element_by_tag_name('mwc_button')
root5 = getShadowRoot(host5)

btn_pedircita = root5.find_element_by_css_selector('#button')
btn_pedircita.click()

这是错误：

Traceback (most recent call last):
  File "h:\Programacion\Python\VacunaCOVID\main.py",line 20,in <module>
    root1 = getShadowRoot(host1)
  File "h:\Programacion\Python\VacunaCOVID\main.py",line 9,in getShadowRoot
    shadow_root = driver.execute_script("return arguments[0].shadowRoot",host)
  File "C:\Users\Alexis\AppData\Local\Programs\Python\Python39\lib\site-packages\selenium\webdriver\remote\webdriver.py",line 634,in execute_script
    return self.execute(command,{
  File "C:\Users\Alexis\AppData\Local\Programs\Python\Python39\lib\site-packages\selenium\webdriver\remote\webdriver.py",line 321,in execute
    self.error_handler.check_response(response)
  File "C:\Users\Alexis\AppData\Local\Programs\Python\Python39\lib\site-packages\selenium\webdriver\remote\errorhandler.py",line 242,in check_response
    raise exception_class(message,screen,stacktrace)
selenium.common.exceptions.JavascriptException: Message: Cyclic object value

这是 HTML：

有什么建议吗？非常感谢！

解决方法

我以某种方式想出了如何去做。这是获取按钮的代码：

host1 = driver.find_element_by_tag_name('vaccinapp-app')
root1 = getShadowRoot(host1)

host2 = root1.find_element_by_tag_name('vaccinapp-shell')
root2 = getShadowRoot(host2)

host3 = root2.find_element_by_tag_name('appointment-shell')
root3 = getShadowRoot(host3)

host4 = root3.find_element_by_tag_name('appointment-onboarding')
root4 = getShadowRoot(host4)

host5 = root4.find_element_by_tag_name('mwc-button')
root5 = getShadowRoot(host5)

btn_pedircita = root5.find_element_by_tag_name('button')
btn_pedircita.click()

现在，关于如何改进/简化此代码的任何建议？我真的不喜欢重复所有这些台词。