How can I install the python "snack" module?

[stan]

I'm trying to poart a small python application to FreeBSD from linux
(routeplanner if you are curious). It requires a number of python modules,
including "snack" I located the tarball for the module, but when I run
configure for it I get:

$ ./configure
loading cache ./config.cache
checking for Tcl configuration... configure: warning: Can't find Tcl
configuration definitions

Can some kind soul tell me how I can fix this?

A brief primer on the general python module installation mthodology would
be useful as well. I'm mainly a perl type, so python is a new fronteir for
me.

Thanks.

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