同时爬取五个函数并输出html

在Python中，如果你需要同时爬取五个不同的URL并输出它们的HTML内容，可以使用线程池或者协程（asyncio）来提高效率。下面是一个使用`concurrent.futures`模块（线程池）的例子：

import concurrent.futures
import requests
from bs4 import BeautifulSoup

def fetch_html(url):
    try:
        response = requests.get(url)
        if response.status_code == 200:
            return response.text
        else:
            print(f"Failed to fetch {url}, status code: {response.status_code}")
            return None
    except Exception as e:
        print(f"Error occurred while fetching {url}: {str(e)}")
        return None

urls = ["http://example1.com", "http://example2.com", "http://example3.com",
        "http://example4.com", "http://example5.com"]

with concurrent.futures.ThreadPoolExecutor() as executor:
    future_to_url = {executor.submit(fetch_html, url): url for url in urls}
    for future in concurrent.futures.as_completed(future_to_url):
        url = future_to_url[future]
        html = future.result()
        if html is not None:
            print(f"Succeeded in fetching {url}:")
            print(html)