当你想要抓取的信息丢失时，创建一个网络爬行器

import requests
from bs4 import BeautifulSoup

def fetch_page(url):
    headers = {
        'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.3'}
    try:
        response = requests.get(url, headers=headers)
        response.raise_for_status()
        return response.text
    except requests.RequestException as e:
        print(f"Error fetching {url}: {e}")
        return None

def parse_page(html):
    soup = BeautifulSoup(html, 'html.parser')
    # 根据网页结构提取信息
    title = soup.find('title').get_text()
    print(f"Title: {title}")

if __name__ == "__main__":
    url = "https://example.com"
    html = fetch_page(url)
    if html:
        parse_page(html)