python爬虫爬取视频完整代码

Python爬虫爬取视频的完整代码可以分为以下几个步骤：

1. 导入所需的库和模块：

import requests
from bs4 import BeautifulSoup
import os

2. 定义一个函数来下载视频：

def download_video(url, save_path):
    response = requests.get(url, stream=True)
    with open(save_path, 'wb') as f:
        for chunk in response.iter_content(chunk_size=1024):
            if chunk:
                f.write(chunk)
                f.flush()
    print("视频下载完成！")

3. 获取要爬取的网页内容：

url = "https://example.com"  # 修改为要爬取的网页链接
response = requests.get(url)
soup = BeautifulSoup(response.text, 'html.parser')

4. 从网页中提取视频链接：

video_links = []
for source in soup.find_all('source'):
    video_links.append(source['src'])

5. 创建一个文件夹来保存下载的视频文件：

save_folder = "videos"  # 修改为保存视频的文件夹路径
if not os.path.exists(save_folder):
    os.makedirs(save_folder)

6. 循环下载视频：

for i, link in enumerate(video_links):
    save_path = os.path.join(save_folder, f"video_{i}.mp4")
    download_video(link, save_path)

完整代码如下：

import requests
from bs4 import BeautifulSoup
import os

def download_video(url, save_path):
    response = requests.get(url, stream=True)
    with open(save_path, 'wb') as f:
        for chunk in response.iter_content(chunk_size=1024):
            if chunk:
                f.write(chunk)
                f.flush()
    print("视频下载完成！")

url = "https://example.com"  # 修改为要爬取的网页链接
response = requests.get(url)
soup = BeautifulSoup(response.text, 'html.parser')

video_links = []
for source in soup.find_all('source'):
    video_links.append(source['src'])

save_folder = "videos"  # 修改为保存视频的文件夹路径
if not os.path.exists(save_folder):
    os.makedirs(save_folder)

for i, link in enumerate(video_links):
    save_path = os.path.join(save_folder, f"video_{i}.mp4")
    download_video(link, save_path)

以上代码可以爬取指定网页中的视频链接，并逐个下载保存到本地的指定文件夹（`videos`）。请注意，这只是个简单的示例代码，实际使用时需要根据具体的网页结构和需求做相应的修改。