[Describe tftp.]
References to Python-related tftp servers: http://mail.python.org/pipermail/python-list/2001-January/024980.html, http://www.penguin-soft.com/penguin/man/8/atftpd.html (small, but no Python content?), and ...
Tftpy is a pure python TFTP client and server implementation under development. See the homepage for more information.