我试图从https://www.udemy.com/courses/search/?q=sql&src=ukw&lang=en中删除所有链接，但是即使没有选择一个元素，我的代码也没有检索到链接。请参阅下面的代码。WebScraping - Python - 在html中找不到链接
import bs4,requests as rq
Link = 'https://www.udemy.com/courses/search/?q=sql&src=ukw&lang=en'
RQOBJ = rq.get(Link)
BS4OBJ = bs4.BeautifulSoup(RQOBJ.text)
print(BS4OBJ)
网站使用JavaScript来获取数据，你应该使用硒
希望你想要的页面上课程的链接，该代码将有助于
from selenium import webdriver
from bs4 import BeautifulSoup
import time
baseurl='https://www.udemy.com'
url="https://www.udemy.com/courses/search/?q=sql&src=ukw&lang=en"
driver = webdriver.Chrome()
driver.maximize_window()
driver.get(url)
time.sleep(5)
content = driver.page_source.encode('utf-8').strip()
soup = BeautifulSoup(content,"html.parser")
courseLink = soup.findAll("a", {"class": "card__title",'href': True})
for link in courseLink:
print baseurl+link['href']
driver.quit()
它会打印：
https://www.udemy.com/the-complete-sql-bootcamp/
https://www.udemy.com/the-complete-oracle-sql-certification-course/
https://www.udemy.com/introduction-to-sql23/
https://www.udemy.com/oracle-sql-12c-become-an-sql-developer-with-subtitle/
https://www.udemy.com/sql-advanced/
https://www.udemy.com/sql-for-newbs/
https://www.udemy.com/sql-for-marketers-data-analytics-data-science-big-data/
https://www.udemy.com/sql-for-punk-analytics/
https://www.udemy.com/sql-basics-for-beginners/
https://www.udemy.com/oracle-sql-step-by-step-approach/
https://www.udemy.com/microsoft-sql-for-beginners/
https://www.udemy.com/sql-tutorial-learn-sql-with-mysql-database-beginner2expert/
您希望获取的链接是什么？任何例子，我尝试你的代码，它给了我很多的HTML字符串回来，它似乎是好的 – linpingta
道歉，我不是很清楚。我喜欢课程链接，所以... https：//www.udemy .com/the-complete-sql-bootcamp/etc – Krishn
是的，我看到...不幸的是，该网站是动态生成的，这意味着它通过使用ajax生成部分html内容禁止简单的网络抓取。你可以尝试CasperJs，它模拟用户访问而不是爬虫，我有一个Facebook粉丝页面的例子，https://github.com/linpingta/facebook-related/tree/master/facebook-fan-page-fetcher – linpingta