请你用Python编写一个功能强大的爬虫，功能至少要有音乐MP3文件爬取等。

编写一个功能强大的Python爬虫涉及多个步骤，这里我会给出一个基本的例子，展示如何使用`requests`库来获取网页内容，并使用`BeautifulSoup`解析HTML，然后通过链接查找并下载MP3文件。但请注意，直接从网站上爬取音乐文件可能违反版权法，实际应用时需要遵守相关规定。

import requests
from bs4 import BeautifulSoup
import os

def download_music(url):
    # 发送HTTP请求
    response = requests.get(url)
    
    # 检查状态码
    if response.status_code == 200:
        # 解析HTML
        soup = BeautifulSoup(response.text, 'html.parser')
        
        # 查找MP3链接
        mp3_links = soup.find_all('a', {'href': lambda x: x and x.endswith('.mp3')})
        
        for link in mp3_links:
            file_url = link['href']
            
            # 下载MP3文件
            filename = os.path.join('music_downloads', os.path.basename(file_url))
            with open(filename, 'wb') as f:
                response = requests.get(file_url, stream=True)
                for chunk in response.iter_content(chunk_size=1024):
                    if chunk:
                        f.write(chunk)
                        f.flush()
                
        print("MP3 files downloaded successfully.")
    else:
        print(f"Failed to fetch page. Status code: {response.status_code}")

# 示例URL
url_to_crawl = "https://example.com/musics"
download_music(url_to_crawl)