简短的爬虫程序，14行Python代码轻松实现爬取网站视频

import requests
from bs4 import BeautifulSoup
import re
 
# 视频下载函数
def download_video(url, filename):
    response = requests.get(url, stream=True)
    with open(filename, 'wb') as f:
        for chunk in response.iter_content(chunk_size=1024):
            if chunk:
                f.write(chunk)
    print(f"视频 {filename} 已保存。")
 
# 主函数
def main(url):
    res = requests.get(url)
    soup = BeautifulSoup(res.text, 'html.parser')
    video_tags = soup.find_all('source')
    video_urls =  for video in video_tags]
    video_urls = [re.sub(r'\\', '', url) for url in video_urls]  # 处理Windows路径问题
    for url in video_urls:
        filename = url.split('/')[-1]
        download_video(url, filename)
 
# 使用方法: 网页url
main('http://www.example.com/videos')

这段代码使用了requests库来发送HTTP请求，BeautifulSoup来解析HTML，以及re库来处理正则表达式。代码中的download_video函数负责实际下载视频，而main函数负责提取视频链接并调用download_video函数进行下载。使用时只需要将'http://www.example.com/videos'替换为目标网页的URL。