root@hostname:/home/shimizu# aptitude install python-pyftpdlib
以下の新規パッケージがインストールされます:
  python-pyftpdlib
...
root@hostname:/home/shimizu# cat ftp.py
from pyftpdlib import ftpserver

authorizer = ftpserver.DummyAuthorizer()
authorizer.add_user('hoge_user', 'hoge_password', '/home/guest/', perm=('elradfmw'))
ftp_handler = ftpserver.FTPHandler
ftp_handler.authorizer = authorizer
address = ("49.212.204.46", 3000)
ftpd = ftpserver.FTPServer(address, ftp_handler)
ftpd.serve_forever()

root@hostname:/home/shimizu# python ftp.py
Starting FTP server
...

http://itpro.nikkeibp.co.jp/members/NNW/NETHOT/20030131/1/
http://atasatamatara.hatenablog.jp/entry/20120814/1344940288
https://code.google.com/p/pyftpdlib/wiki/Tutorial