如何从动态更新网页中提取数据

Question

我想从丝芙兰网站上抓取评论。评论是动态更新的。

经过检查，我发现评论在 HTML 代码中。

<div class="css-eq4i08 " data-comp="Ellipsis Box">Honestly I never write 
reviews but this is a must if you have frizzy after even after straightening 
it! It smells fantastic and it works wonders definitely will be restocking once 
I’m done this one !!</div>

我想写一个 python selenium 代码来阅读评论。

我写的代码在这里……

from selenium import webdriver
chrome_path = (r"C:/Users/Connectm/Downloads/chromedriver.exe")

driver = webdriver.Chrome(chrome_path)
driver.implicitly_wait(20) 
driver.get("https://www.sephora.com/product/crybaby-coconut-oil-shine-serum-P439093?skuId=2122083&icid2=just%20arrived:p439093")
reviews = driver.find_element_by_xpath('//*[@id="ratings-reviews"]/div[4]/div[2]/div[2]/div[1]/div[3][@data-comp()='Elipsis Box'])
print(reviews.text)

如果我写 find_element_by_class 它会给我空白。

什么是最好的选择？

我正在尝试使用带有属性的 xpath。代码不起作用。 有人请帮助我最好的解决方案是什么？

Answer 1

要从丝芙兰网站上抓取评论，您必须诱导 WebDriverWait 以使元素可见，您可以使用以下解决方案：

• 代码块：

  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
  
  options = webdriver.ChromeOptions()
  options.add_argument("start-maximized")
  options.add_argument("disable-infobars")
  options.add_argument("--disable-extensions")
  driver = webdriver.Chrome(chrome_options=options, executable_path=r'C:\Utility\BrowserDrivers\chromedriver.exe')
  driver.get("https://www.sephora.com/product/crybaby-coconut-oil-shine-serum-P439093?skuId=2122083&icid2=just%20arrived:p439093")
  driver.execute_script("arguments[0].scrollIntoView(true);", WebDriverWait(driver,20).until(EC.visibility_of_element_located((By.XPATH, "//div[@id='tabpanel0']/div//b[contains(., 'What Else You Need to Know')]"))))
  reviews = WebDriverWait(driver,20).until(EC.visibility_of_all_elements_located((By.XPATH, "//div[@data-comp='GridCell Box']//div[@data-comp='Ellipsis Box']")))
  for review in reviews:
      print(review.get_attribute("innerHTML"))
  

• 控制台输出：

  Honestly I never write reviews but this is a must if you have frizzy after even after straightening it! It smells fantastic and it works wonders definitely will be restocking once I’m done this one !!
  I really like this product. I was looking for something to tame frizz and fly aways during the winter and this does the job. At first I was nervous it might give a greasy look but it makes my hair smooth and soft. Scent is actually a little subtle for me, but still nice.
  This oil-serum is perfect for the right level of hydration without the feel of oil residue. Great for all hair types and my new go-to product.
  I LOVE how weightless this oil feels in my hair.. takes away all of my flyaways without looking of feeling greasy.. the packaging is COOL (travel-friendly) and it smells wonderful!!
  I tried this when it first dropped on their website. I’ve been using it for about 3 weeks now. And I have to say its just OKAY. Nothing super special about it. I haven’t noticed super smooth hair that isn’t given with other products that cost less. It’s just like any other smoothing serum. I also can’t figure out what the smell is. It doesn’t really smell as pleasant as their other products.
  in love!! A tiny bit goes a long way. No more fly aways. No more frizz from touch or environment.