Installing SpamBayes

[Dog@will.hunt]

I am brand new to the whole Python thing and am trying to install SpamBayes
so that I can use the proxy server to filter spam at my office.  I am having
trouble following the instructions provided.  It says to run the setup.py
file using the following command in IDLE in the directory that I extracted
the spambayes files into: python setup.py install.

When I do this, it tells me that python is not a recognized command.

PLEASE HELP!!

Signed,

Frustrated.