如何在python中使用多线程同时下载多个文件

import threading
import requests

def download_file(url, filename):
    response = requests.get(url)
    with open(filename, 'wb') as file:
        file.write(response.content)
    print(f'{filename} 下载完成')

def main():
    urls = [
        'https://example.com/file1.jpg',
        'https://example.com/file2.jpg',
        'https://example.com/file3.jpg'
    ]
    filenames = ['file1.jpg', 'file2.jpg', 'file3.jpg']

    threads = []
    for url, filename in zip(urls, filenames):
        thread = threading.Thread(target=download_file, args=(url, filename))
        thread.start()
        threads.append(thread)

    for thread in threads:
        thread.join()

    print('所有文件下载完成')

if __name__ == '__main__':
    main()