Download the latest "tarball": wikiup-0.2.2.tar.gz
Untar it, and in its main directory run the setup.py script, and install (as root) to put the Python modules in place:
./setup.py install install src/parsewikiup /usr/bin
In Debian, that script needs the package python-dev. Alternatively you can copy the lib/wikiup.py module to the default Python library directory, and the script src/parsewikiup to /usr/bin or other directory from where it could be run. You can even copy both files to a directory where you have access, for example, your home directory if you do not have root privileges.
If you are going to use mathematical equations, you must have installed Latex and dvipng (http://dvipng.sourceforge.net)
To parse a source file "mypage" use:
/directory/parsewikiup -o mypage.html mypage
("directory" is where you installed the scripts) to generate an HTML file mypage.html