example.py

import os
import time
from selenium import webdriver
from collections import defaultdict

def getOptions(select):
    return select.find_elements_by_tag_name("option")

def getOptgroups(select):
    return select.find_elements_by_tag_name("optgroup")

def getYears(select):
    selyears = getOptions(select)[1:]
    years = []
    for y in selyears:
        years.append(y.text)
    return years

url = 'https://www.edmunds.com/car-reviews/'
driver = webdriver.Chrome("/usr/lib/chromium-browser/chromedriver")
driver.get(url)

time.sleep(2)

selmake_element = driver.find_element_by_name("select-make")
selmake_element.click()
options = getOptions(selmake_element)[1:]

allcars = defaultdict(dict)
urls = defaultdict(dict)

for o in options:
    brand = o.text
    cars = {}
    o.click()
    time.sleep(0.2)
    selmodel_element = driver.find_element_by_name("select-model")
    time.sleep(0.2)
    optgroups = getOptgroups(selmodel_element)
    selyear_element = driver.find_element_by_name("select-year")
    if(len(optgroups) > 0):
        popular = getOptions(optgroups[0])
        others = getOptions(optgroups[1])
        for p in popular:
            p.click()
            selyear_element.click()
            
            cars[o.text] = getYears(selyear_element)
        for o in others:
            o.click()
            selyear_element.click()
            cars[o.text] = getYears(selyear_element)
    else:
        models = getOptions(selmodel_element)[1:]
        for m in models:
            m.click()
            selyear_element.click()
            cars[o.text] = getYears(selyear_element)

    allcars[brand] = cars

for brand in allcars:
    urls[brand] = {}
    for car in allcars[brand]:
        urls[brand][car] = {}
        urls[brand][car]["reviews"] = []
        for year in allcars[brand][car]:
            urls[brand][car]["reviews"].append("https://www.edmunds.com/{}/{}/{}/review/".format(brand, car, year))

print(allcars.items())
print(urls.items())

driver.quit()