Python Selenium Webdriver: Unable to load all reviews on the browser

Question

I am trying to extract all google reviews of a restaurant. There are just over 900 reviews of the restaurant. However, my script was only able to extract 50 reviews. I am not sure where am I making the mistake. Any help to fix the issue would be highly appreciated. Here is my code:

from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
from selenium.webdriver.chrome.options import Options
from selenium.webdriver.common.action_chains import ActionChains
import time

driver = webdriver.Chrome()
base_url = 'https://www.google.com/search?tbs=lf:1,lf_ui:9&tbm=lcl&sxsrf=AOaemvJFjYToqQmQGGnZUovsXC1CObNK1g:1633336974491&q=10+famous+restaurants+in+Dunedin&rflfq=1&num=10&sa=X&ved=2ahUKEwiTsqaxrrDzAhXe4zgGHZPODcoQjGp6BAgKEGo&biw=1280&bih=557&dpr=2#lrd=0xa82eac0dc8bdbb4b:0x4fc9070ad0f2ac70,1,,,&rlfi=hd:;si:5749134142351780976,l,CiAxMCBmYW1vdXMgcmVzdGF1cmFudHMgaW4gRHVuZWRpbiJDUjEvZ2VvL3R5cGUvZXN0YWJsaXNobWVudF9wb2kvcG9wdWxhcl93aXRoX3RvdXJpc3Rz2gENCgcI5Q8QChgFEgIIFkiDlJ7y7YCAgAhaMhAAEAEQAhgCGAQiIDEwIGZhbW91cyByZXN0YXVyYW50cyBpbiBkdW5lZGluKgQIAxACkgESaXRhbGlhbl9yZXN0YXVyYW50mgEkQ2hkRFNVaE5NRzluUzBWSlEwRm5TVU56ZW5WaFVsOUJSUkFCqgEMEAEqCCIEZm9vZCgA,y,2qOYUvKQ1C8;mv:[[-45.8349553,170.6616387],[-45.9156414,170.4803685]]'
driver.get(base_url)
WebDriverWait(driver,10).until(EC.element_to_be_clickable((By.XPATH,"//div[./span[text()='Newest']]"))).click()

title = driver.find_element_by_xpath("//div[@class='P5Bobd']").text
address = driver.find_element_by_xpath("//div[@class='T6pBCe']").text
overall_rating = driver.find_element_by_xpath("//div[@class='review-score-container']//span[@class='Aq14fc']").text
total_reviews_text =driver.find_element_by_xpath("//div[@class='review-score-container']//div//div//span//span[@class='z5jxId']").text
 
num_reviews = int (total_reviews_text.split()[0])
all_reviews = WebDriverWait(driver, 3).until(EC.presence_of_all_elements_located((By.CSS_SELECTOR, 'div.gws-localreviews__google-review')))
total_reviews = len(all_reviews)

while total_reviews < num_reviews:
        driver.execute_script('arguments[0].scrollIntoView(true);', all_reviews[-1])
        WebDriverWait(driver, 5, 0.25).until_not(EC.presence_of_element_located((By.CSS_SELECTOR, 'div[class$="activityIndicator"]')))
        #all_reviews = driver.find_elements_by_css_selector('div.gws-localreviews__google-review')
        all_reviews = WebDriverWait(driver, 3).until(EC.presence_of_all_elements_located((By.CSS_SELECTOR, 'div.gws-localreviews__google-review')))
        print(total_reviews)
        total_reviews +=1

Answer 1

Selenium expected condition presence_of_all_elements_located doesn't really wait for presence of ALL the elements matching the passed to that method locator.
It actually waits for at least 1 element matching the passed locator.
So instead of

num_reviews = int (total_reviews_text.split()[0])
all_reviews = WebDriverWait(driver, 3).until(EC.presence_of_all_elements_located((By.CSS_SELECTOR, 'div.gws-localreviews__google-review')))
total_reviews = len(all_reviews)

Please try this:

num_reviews = int (total_reviews_text.split()[0])
WebDriverWait(driver, 20).until(EC.presence_of_all_elements_located((By.CSS_SELECTOR, 'div.gws-localreviews__google-review')))
time.sleep(2)
all_reviews = driver.find_elements_by_css_selector('div.gws-localreviews__google-review')
total_reviews = len(all_reviews)

Possibly you will have the same issue with the second use of presence_of_all_elements_located as well.
Generally, never trust presence_of_all_elements_located, it will give you the first caught matches only.

Answer 2

If you notice the reviews are lazy-loaded as you scroll. You may need to add some code to scroll down and wait for all the reviews to appear.