PyCHM is a package that provides bindings for Jed Wing's CHMLIB
library. The chm package contains four modules, namely chm.chm, 
chm.chmlib, chm.extra and chm._chmlib. chm.chmlib is a low level 
wrapper module around the API provided by the C library chmlib. 

PyCHM requires chmlib (available on SlackBuilds.org).