[Twisted-Python] How to setup a ftpserver, ftpclient?

[Joan Torres]

Hi,
 I'm trying to setup a FTPserver, FTPClient for sending a File Transfer.
 I found a FTPClient.py example in ./doc/examples. I've modified the example
 and add "ftpClent.retrieveFile('file_name', fileProtocol). What I really
 don't know is how to setup the fileProtocol and also the FTPserver part.

 I suppose this may be easy, but I'm new in twisted.
 Could someone help me?
 Thanks in advanced
 Joan Torres