我怎样才能抓取几页pdf文件呢？

import requests
from bs4 import BeautifulSoup

def fetch_pdf_pages(url, num_pages):
    response = requests.get(url)
    soup = BeautifulSoup(response.content, 'html.parser')
    
    pdf_links = []
    for link in soup.find_all('a'):
        href = link.get('href')
        if href.endswith('.pdf'):
            pdf_links.append(href)
    
    for i in range(min(num_pages, len(pdf_links))):
        pdf_url = pdf_links[i]
        response = requests.get(pdf_url)
        with open(f'page_{i+1}.pdf', 'wb') as f:
            f.write(response.content)

# 示例调用
url = 'https://example.com/page-with-pdfs'
num_pages = 3
fetch_pdf_pages(url, num_pages)