无法使用selenium在Wunderground.com上将设置设置为公制

Question

我想从wunderground.com上搜集一些数据。 因为我住在一个使用公制的国家，所以我想更改设置，以便使用公制显示所有数据

公制设置隐藏在一个下拉按钮后面 pic of settings button我似乎无法单击它，因为在click（）之后，它无法在随后的“dropdown”中找到元素

这是我用来尝试更改设置的代码：

class WundergroundLong():
def __init__(self):
    self.r ='https://www.wunderground.com/dashboard/pws/IDEKRIM2'
    self.chrome_options = webdriver.ChromeOptions()
    self.chrome_options.add_argument('--headless')
    self.chrome_options.add_argument('--no-sandbox') # required when running as root user. otherwise you would get no sandbox errors.
    self.driver = webdriver.Chrome(chrome_options=self.chrome_options)

def scrapeTable(self):
    self.driver.get(self.r)
    self.settings = self.driver.find_element(By.XPATH, "//button[@id='wuSettings']")
    self.settings.click()
    WebDriverWait(self.driver,4)
    self.metric = self.driver.find_element(By.XPATH, '//*[@id="wuSettings-quick"]/div/a[2]')
    self.metric.click()

instance = WundergroundLong()
    table = instance.scrapeTable()

显示以下错误代码

   Traceback (most recent call last):
  File "/home/wouter/Programming/kantine_scripts/wunderground/wunderground.py", line 85, in <module>
    table = instance.scrapeTable()
  File "/home/wouter/Programming/kantine_scripts/wunderground/wunderground.py", line 37, in scrapeTable
    self.metric = self.driver.find_element(By.XPATH, '//*[@id="wuSettings-quick"]/div/a[2]')
  File "/home/wouter/Programming/kantine_scripts/env/lib/python3.7/site-packages/selenium/webdriver/remote/webdriver.py", line 978, in find_element
    'value': value})['value']
  File "/home/wouter/Programming/kantine_scripts/env/lib/python3.7/site-packages/selenium/webdriver/remote/webdriver.py", line 321, in execute
    self.error_handler.check_response(response)
  File "/home/wouter/Programming/kantine_scripts/env/lib/python3.7/site-packages/selenium/webdriver/remote/errorhandler.py", line 242, in check_response
    raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.NoSuchElementException: Message: no such element: Unable to locate element: {"method":"xpath","selector":"//*[@id="wuSettings-quick"]/div/a[2]"}
  (Session info: headless chrome=63.0.3239.132)
  (Driver info: chromedriver=2.35.528139 (47ead77cb35ad2a9a83248b292151462a66cd881),platform=Linux 4.14.109-1-MANJARO x86_64)