如何使用 selenium 從網頁獲取所有鏈接？

Question

我正在嘗試使用 Python、Selenium、Beautifulsoup 對網站進行網絡抓取。當我嘗試獲取所有鏈接時，它返回了一個無效字符串。 這是我試過的有人可以幫助我嗎？

from time import sleep
from selenium.webdriver.common.by import By
from selenium import webdriver
driver = webdriver.Chrome()
driver.get('https://www.hirist.com/c/filter/mobile-applications-jobs-in-cochin%20kochi_trivandrum%20thiruvananthapuram-5-70_75-0-0-1-0-0-0-0-2.html?ref=homepagecat')
sleep(10)
links = driver.find_elements(by=By.XPATH, value='.//div[@class="jobfeed-wrapper multiple-wrapper"]')
for link in links:
    link.get_attribute('href')
    print(link)

Answer 1

xpath是你的選擇，你 select 沒有href屬性的<div> 。 Select 也是它的第一個<a>像.//div[@class="jobfeed-wrapper multiple-wrapper"]/a並且它會工作：

links = driver.find_elements(by=By.XPATH, value='.//div[@class="jobfeed-wrapper multiple-wrapper"]/a')
for link in links:
    print(link.get_attribute('href'))

例子

而不是使用WebDriverWait time檢查特定元素是否可用。

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

url = 'https://www.hirist.com/c/filter/mobile-applications-jobs-in-cochin%20kochi_trivandrum%20thiruvananthapuram-5-70_75-0-0-1-0-0-0-0-2.html?ref=homepagecat'
driver = webdriver.Chrome(ChromeDriverManager().install())
driver.maximize_window()
driver.get(url)

wait = WebDriverWait(driver, 10)

links = wait.until(EC.presence_of_all_elements_located((By.XPATH, './/div[@class="jobfeed-wrapper multiple-wrapper"]/a')))
for link in links:
    print(link.get_attribute('href'))

Output

https://www.hirist.com/j/xforia-technologies-android-developer-javakotlin-10-15-yrs-1011605.html?ref=cl&jobpos=1&jobversion=2
https://www.hirist.com/j/firminiq-system-ios-developer-swiftobjective-c-3-10-yrs-1011762.html?ref=cl&jobpos=2&jobversion=2
https://www.hirist.com/j/firminiq-system-android-developer-kotlin-3-10-yrs-1011761.html?ref=cl&jobpos=3&jobversion=2
https://www.hirist.com/j/react-native-developer-mobile-app-designing-3-5-yrs-1009438.html?ref=cl&jobpos=4&jobversion=2
https://www.hirist.com/j/flutter-developer-iosandroid-apps-2-3-yrs-1008214.html?ref=cl&jobpos=5&jobversion=2
https://www.hirist.com/j/accubits-technologies-react-native-developer-ios-android-platforms-3-7-yrs-1003520.html?ref=cl&jobpos=6&jobversion=2
https://www.hirist.com/j/appincubator-react-native-developer-iosandroid-platform-2-7-yrs-1001957.html?ref=cl&jobpos=7&jobversion=2

Answer 2

您沒有在計算機上聲明 chromedriver 的路徑。 檢查 chromdriver 在哪里，然后嘗試

driver = webdriver.Chrome(executable_path=CHROME_DRIVER_PATH)