python3-chm 0.8.4.1-2build1 (amd64 binary) in ubuntu focal

 PyCHM is a package that provides Python binding for Jed Wing's CHMLIB library.
 .
 The chm package contains four modules, namely chm.chm, chm.chmlib,
 chm.extra and chm._chmlib, which provide access to the API implemented
 by the C library chmlib and some additional classes and functions.
 They are used to access MS-ITSS encoded files - Compressed Html Help
 files (.chm).
 .
 This package contain the Python 3 version of chm.