我在解析 YouTube 播放列表的 HTML 时遇到问题。例如，当我检查“https://www.youtube.com/playlist?list=PLS1QulWo1RIYmaxcEqw5JhK3b-6rgdWO_”的标签时。我看到类名“yt-simple-endpoint.style-scope.ytd-playlist-video-renderer”。但是当我使用 bs4 选择元素时，这不起作用。但是，我在网上找到了另一段工作代码，它选择了以下类“pl-video-title-link”。但是我在网页上找不到这个类，而且没有一个标签有这个类？附件是工作代码。任何帮助将不胜感激。
from bs4 import BeautifulSoup as bs
import requests
r = requests.get('https://www.youtube.com/playlist?
list=PLS1QulWo1RIYmaxcEqw5JhK3b-6rgdWO_')
page = r.text
soup = bs(page,'html.parser')
res = soup.find_all('a',{'class':'pl-video-title-link'})
for l in res:
print (l.get("href"))
请您参考如下方法:
此页面使用 JavaScript 更改其结构，但您可以在下载后打印 soup 并查看视频链接的初始位置。在这种情况下，在标记 <tr> 中与类 pl-video :
from bs4 import BeautifulSoup
import requests
url = 'https://www.youtube.com/playlist?list=PLS1QulWo1RIYmaxcEqw5JhK3b-6rgdWO_'
page = requests.get(url)
soup = BeautifulSoup(page.text, 'lxml')
for i, tr in enumerate(soup.select('tr.pl-video')):
print('{}. {}'.format(i + 1, tr['data-title']))
print('https://www.youtube.com' + tr.a['href'])
print('-' * 80)
打印:
1. Shell Scripting Tutorial for Beginners 1 - Introduction
https://www.youtube.com/watch?v=cQepf9fY6cE&list=PLS1QulWo1RIYmaxcEqw5JhK3b-6rgdWO_&index=2&t=0s
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2. Shell Scripting Tutorial for Beginners 2 - using Variables and Comments
https://www.youtube.com/watch?v=vQv4W-JfrmQ&list=PLS1QulWo1RIYmaxcEqw5JhK3b-6rgdWO_&index=3&t=0s
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3. Shell Scripting Tutorial for Beginners 3 - Read User Input
https://www.youtube.com/watch?v=AcSkkNAsGCY&list=PLS1QulWo1RIYmaxcEqw5JhK3b-6rgdWO_&index=4&t=0s
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... all the way to:
32. How Install VirtualBox Guest Additions on Ubuntu 18.04 Guest / virtual machine
https://www.youtube.com/watch?v=qNecdUsuTPw&list=PLS1QulWo1RIYmaxcEqw5JhK3b-6rgdWO_&index=33&t=0s
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33. How to install Java JDK 10 on Ubuntu 18.04 LTS (Debian Linux)
https://www.youtube.com/watch?v=4RJ60fqeTN4&list=PLS1QulWo1RIYmaxcEqw5JhK3b-6rgdWO_&index=34&t=0s
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