由于这两个变量被标记为python和web-scraping，让我们看看十年后在python中实现这一点的方法：

import undetected_chromedriver as uc
browser = uc.Chrome()

from selenium.webdriver.common.by import By

from selenium.webdriver.support.ui import WebDriverWait as wait
from selenium.webdriver.support.ui import Select
from selenium.webdriver.support import expected_conditions as EC

url = 'http://nutritiondata.self.com/facts/snacks/1/1'

browser.get(url)

calories = WebDriverWait(browser, 20).until(EC.element_to_be_clickable((By.ID, "KJ_NUTRIENT_1")))
print('Better late than never:', calories.text)
browser.quit()

结果：

Better late than never: (0.4 kJ)