使用硒向下滚动谷歌评论 [英] Scroll down google reviews with selenium

问题描述

我试图从这个链接中抓取评论:

I'm trying to scrape the reviews from this link:

https://www.google.com/search?q=google+reviews+2nd+chance+treatment+40th+street&rlz=1C1JZAP_enUS697US697&oq=google+reviews+2nd+chance+treatment+40th+street&aqs=chrome..69i57j69i64.6183j0j7&sourceid=chrome&ie=UTF-8#lrd=0x872b7179b68e33d5:0x24b5517d86a95f89,1

For what I'm using the following code to load the page

from selenium import webdriver
import datetime
import time
import argparse
import os
import time

#Define the argument parser to read in the URL

url = "https://www.google.com/search?q=google+reviews+2nd+chance+treatment+40th+street&rlz=1C1JZAP_enUS697US697&oq=google+reviews+2nd+chance+treatment+40th+street&aqs=chrome..69i57j69i64.6183j0j7&sourceid=chrome&ie=UTF-8#lrd=0x872b7179b68e33d5:0x24b5517d86a95f89,1"


# Initialize the Chrome webdriver and open the URL
#driver = webdriver.Chromium()


profile = webdriver.FirefoxProfile()
profile.set_preference("general.useragent.override", "Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; AS; rv:11.0) like Gecko")
#driver = webdriver.Firefox(profile)
# https://stackoverflow.com/questions/22476112/using-chromedriver-with-selenium-python-ubuntu
driver = webdriver.Chrome("/usr/lib/chromium-browser/chromedriver")

driver.get(url)

driver.implicitly_wait(2)



SCROLL_PAUSE_TIME = 0.5

# Get scroll height
last_height = driver.execute_script("return document.body.scrollHeight")

while True:
    # Scroll down to bottom
    driver.execute_script("window.scrollTo(0, document.body.scrollHeight);")

    # Wait to load page
    time.sleep(SCROLL_PAUSE_TIME)

    # Calculate new scroll height and compare with last scroll height
    new_height = driver.execute_script("return document.body.scrollHeight")
    if new_height == last_height:
        break
    last_height = new_height

The page load fine, it is not scrolling down, I have used the same code for other sites like linkedn and it works there.

解决方案

Here is the logic that you can use without using the javascript scroll down. Simple and effective by using the location_once_scrolled_into_view method which will scroll to the element.

As part of logic below, we are scrolling to the last review, and then checking if we loaded the number of reviews desired as per the request.

Imports Needed:

from selenium.webdriver.common.by import By
from selenium.webdriver.support import expected_conditions as EC
from selenium.webdriver.support.ui import WebDriverWait

change the desiredReviewsCount variable value as per your requirement in the below code.

wait = WebDriverWait(driver,10)
url = "https://www.google.com/search?q=google+reviews+2nd+chance+treatment+40th+street&rlz=1C1JZAP_enUS697US697&oq=google+reviews+2nd+chance+treatment+40th+street&aqs=chrome..69i57j69i64.6183j0j7&sourceid=chrome&ie=UTF-8#lrd=0x872b7179b68e33d5:0x24b5517d86a95f89,1"
driver.get(url)
x=0
desiredReviewsCount=30
wait.until(EC.presence_of_all_elements_located((By.XPATH,"//div[@class='gws-localreviews__general-reviews-block']//div[@class='WMbnJf gws-localreviews__google-review']")))
while x<desiredReviewsCount:
    driver.find_element_by_xpath("(//div[@class='gws-localreviews__general-reviews-block']//div[@class='WMbnJf gws-localreviews__google-review'])[last()]").location_once_scrolled_into_view
    x = len(driver.find_elements_by_xpath("//div[@class='gws-localreviews__general-reviews-block']//div[@class='WMbnJf gws-localreviews__google-review']"))

print (len(driver.find_elements_by_xpath("//div[@class='gws-localreviews__general-reviews-block']//div[@class='WMbnJf gws-localreviews__google-review']")))

这篇关于使用硒向下滚动谷歌评论的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！