[Tutor] Assigning a variable to an FTP directory listing

[Danny Yoo]

By the way, I would recommend not doing this with FTP.  If I remember
rightly, it passes passwords in plain text, which is not so good.
Reference: http://en.wikipedia.org/wiki/File_Transfer_Protocol#Security.
 You might just want to use something like 'ssh ls' to run ls on the
remote system.

There was some discussion on how to drive ssh programmatically just
from yesterday.  Here's a link to the archive thread:
https://mail.python.org/pipermail/tutor/2013-December/098795.html