Selenium：如何单击“显示”按钮、刮除HREF，然后再次单击“显示”按钮？

Question

链接到我正在尝试刮取的页面：

https://www.nytimes.com/reviews/dining

因为这个页面有一个“show more”按钮，所以我需要Selenium自动反复单击“show more”按钮，然后以某种方式使用Beauty soup来获取页面上每个餐厅评论的链接。在下面的照片中，我想获取的链接位于https://...onigiri.html"

迄今为止的代码：

url = "https://www.nytimes.com/reviews/dining"
driver = webdriver.Chrome('chromedriver',chrome_options=chrome_options)
driver.get(url)

for i in range(1):
  button = driver.find_element_by_tag_name("button")
  button.click()

我如何使用WebDriver等待和美丽汤[美丽汤（driver.page_source，'html.parser'）]来完成这个任务？

Answer 1

这是一个懒惰加载应用程序。要单击显示更多按钮，您需要使用无限循环和向下滚动页面，然后单击并等待一段时间加载页面，然后存储列表中的值。验证前后列表是否匹配，然后从无限循环中断。

代码：

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

driver=webdriver.Chrome()
driver.get("https://www.nytimes.com/reviews/dining")
#To accept the coockie click on that
WebDriverWait(driver,20).until(EC.element_to_be_clickable((By.XPATH,"//button[text()='Accept']"))).click()
listhref=[]

while(True):
    driver.execute_script("window.scrollTo(0, document.body.scrollHeight);")
    elements=WebDriverWait(driver,20).until(EC.visibility_of_all_elements_located((By.CSS_SELECTOR,"a.css-gg4vpm")))
    lenlistbefore=len(listhref)
    for ele in elements:
        if ele.get_attribute("href") in listhref:
            continue
        else:
            listhref.append(ele.get_attribute("href"))

    lenlistafter = len(listhref)

    if lenlistbefore==lenlistafter:
        break

    button=WebDriverWait(driver,10).until(EC.visibility_of_element_located((By.XPATH,"//button[text()='Show More']")))
    driver.execute_script("arguments[0].click();", button)
    time.sleep(2)
print(len(listhref))
print(listhref)

注意：-我得到列表计数499

Answer 2

转到https://www.nytimes.com/reviews/dining按F12，然后按Ctrl Shift C获取元素显示更多，然后如图所示获取元素的xpath：

要查找xpath，请查看：

https://www.techbeamers.com/locate-elements-selenium-python/#locate-xpath中的元素

import time
from selenium import webdriver
from selenium.webdriver.chrome.options import Options

def executeTest():
    global driver
    driver.get('https://www.nytimes.com/reviews/dining')
    time.sleep(7)
    element = driver.find_element_by_xpath('Your_Xpath')
    element.click()
    time.sleep(3)

def startWebDriver():
    global driver
    options = Options()
    options.add_argument("--disable-infobars")
    driver = webdriver.Chrome(chrome_options=options)

if __name__ == "__main__":
    startWebDriver()
    executeTest()
    driver.quit()