如何在抓取网站时到达最后一页后停止 selenium webdriver?

How to stop the selenium webdriver after reaching the last page while scraping the website?

网站上的数据量(页数)不断变化,我需要通过分页循环抓取所有页面。 网站:https://monentreprise.bj/page/annonces

我试过的代码:

xpath= "//*[@id='yw3']/li[12]/a"        
while True:
    next_page = driver.find_elements(By.XPATH,xpath)
    if len(next_page) < 1:
        print("No more pages")
        break
    else:
        WebDriverWait(driver, 10).until(EC.element_to_be_clickable((By.XPATH, xpath))).click()
        print('ok')

ok连续打印

因为条件if len(next_page)<1总是False。

例如,我尝试了 url monentreprise.bj/page/annonces?Company_page=99999999999999999999999,它给出了第 13 页,也就是最后一页

您可以尝试检查“下一页”按钮是否被禁用

这里有几个问题:

  1. //*[@id='yw3']/li[12]/a 不是 next 分页按钮的正确定位符。
  2. 此处到达最后一页状态的更好指示是验证此基于 css_locator 的元素 .pagination .next 是否包含 disabled class.
  3. 您必须向下滚动页面才能单击下一页按钮
  4. 您必须在单击分页按钮后添加延迟。否则这将不起作用。
    这段代码对我有用:
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
import time

driver = webdriver.Chrome()
my_url = "https://monentreprise.bj/page/annonces"
driver.get(my_url)
next_page_parent = '.pagination .next'
next_page_parent_arrow = '.pagination .next a'
while True:
    driver.execute_script("window.scrollTo(0, document.body.scrollHeight)")
    time.sleep(0.5)
    parent = driver.find_element(By.CSS_SELECTOR,next_page_parent)
    class_name = parent.get_attribute("class")
    if "disabled" in class_name:
        print("No more pages")
        break
    else:
        WebDriverWait(driver, 10).until(EC.element_to_be_clickable((By.CSS_SELECTOR, next_page_parent_arrow))).click()
        time.sleep(1.5)
        print('ok')

输出为:

ok
ok
ok
ok
ok
ok
ok
ok
ok
ok
ok
ok
ok
No more pages