有没有办法在FTP python中设置最小块大小？

import os
from ftplib import FTP

def split_file(file_path, chunk_size):
    file_name = os.path.basename(file_path)
    file_size = os.path.getsize(file_path)
    chunks = []
    with open(file_path, 'rb') as f:
        while True:
            chunk = f.read(chunk_size)
            if not chunk:
                break
            chunks.append(chunk)
    return file_name, file_size, chunks

def upload_file_chunks(ftp, file_name, chunks):
    ftp.storbinary('STOR ' + file_name, chunks)

def main():
    ftp = FTP('ftp.example.com')
    ftp.login('username', 'password')

    file_path = 'path/to/file'
    chunk_size = 1024 * 1024  # 1MB

    file_name, file_size, chunks = split_file(file_path, chunk_size)
    upload_file_chunks(ftp, file_name, chunks)

    ftp.quit()

if __name__ == '__main__':
    main()