Python中使用多线程实现 FTP 文件下载

from ftplib import FTP
import threading

class FtpDownloader:
    def __init__(self, server, user, password):
        self.server = server
        self.user = user
        self.password = password
        self.ftp = FTP(self.server, self.user, self.password)

    def download_file(self, remote_path, local_path):
        with open(local_path, 'wb') as f:
            self.ftp.retrbinary('RETR ' + remote_path, f.write)

    def download_files(self, files):
        for remote_path, local_path in files:
            t = threading.Thread(target=self.download_file, args=(remote_path, local_path))
            t.start()

    def close(self):
        self.ftp.quit()

def main():
    server = 'ftp.example.com'
    user = 'username'
    password = 'password'

    downloader = FtpDownloader(server, user, password)

    files = [
        ('remote_path1', 'local_path1'),
        ('remote_path2', 'local_path2'),
        # ...
    ]

    downloader.download_files(files)
    downloader.close()

if __name__ == '__main__':
    main()