We will use the browser automation tool Selenium to operate a headless FireFox browser that will parse the HTML content for us.

The following code opens the FireFox browser:

from selenium import webdriver

# create a driver called Firefox
driver = webdriver.Firefox()

Let's close the browser:

# close it
driver.close()

To retrieve the HTML source code using selenium and Firefox, do the following:

import time, re

# visit the opentable listing page
driver = webdriver.Firefox()
driver.get(url)

time.sleep(1) # wait 1 second

# retrieve the html source
html = driver.page_source
html = BeautifulSoup(html, "lxml")

for booking in html.find_all('div', {'class': 'booking'}):
    match = re.search(r'd+', booking.text)
    if match:
        print(match.group())