如何用python爬取多个网页的logo

您可以使用Python中的requests和BeautifulSoup库来爬取多个网页的Logo。下面是一个简单的示例代码：

import requests
from bs4 import BeautifulSoup
from urllib.parse import urljoin

def get_logo_url(url):
    response = requests.get(url)
    soup = BeautifulSoup(response.text, 'html.parser')
    
    logo_url = None
    
    # 根据网页结构找到Logo图片的URL
    # 这里仅提供一个简单示例，具体根据网页结构进行相应的修改
    logo = soup.find('img', {'class': 'logo'})
    if logo:
        logo_url = urljoin(url, logo['src'])
    
    return logo_url

# 要爬取的网页URL列表
urls = ['https://www.example1.com', 'https://www.example2.com', 'https://www.example3.com']

for url in urls:
    logo_url = get_logo_url(url)
    if logo_url:
        # 下载Logo图片
        response = requests.get(logo_url)
        if response.status_code == 200:
            with open(f'{url.split("//")[1]}.png', 'wb') as f:
                f.write(response.content)
            print(f'Successfully downloaded logo from {url}')
        else:
            print(f'Failed to download logo from {url}')
    else:
        print(f'No logo found on {url}')

上述代码假设Logo图片的URL位于`<img>`标签的`src`属性中，且Logo图片的类名为`logo`。您可以根据具体的网页结构进行相应的修改，以适应不同的网页。

请注意，爬取网页内容需要遵守相关网站的规则和法律，确保您获得了合法的权限。