setup.py rev 2788 has:
For performance reasons, Thuban access wxPython objects at the
C++ level so that it can directly call wxWidgets code from C++.
The normal and preferred way to do that is to use the API
defined in wxPython.h. Unfortunately, this header file is not
distributed with binary packages of wxPython on some platforms.
By using the --use-wx-python-swig-hack option you can activate a
way to access the C++ objects without wxPython.h. This relies
on internals of SWIG, so it might change with future wxPython
versions. Therefore, only use this option if the normal way
doesn't work for you.
Debian today (20071201) still does not ship the packages,
there is a discussion at:
Which also claims that Robin Dunn, the maintainer of wxPython
did not want to fix it in the upstream package.