LLFUSE can be installed like any other Python extension. Make sure that you have the Python and FUSE development headers installed, then download and extract the LLFUSE tarball and run
sudo python setup.py install
or
python setup.py install --user
Note that LLFUSE requires at least FUSE 2.8.0 and Python 2.6.
If you have checked out the unstable development version from the Mercurial repository, a bit more effort is required. You need to have recent versions of Cython and Sphinx installed, and the necessary commands are:
python setup.py build_cython
python setup.py build_ext --inplace
python setup.py build_sphinx
python setup.py install