This Python module reads GROMACS trajectory files in xtc format. It is based on the library libxdrf.c from GROMACS. In fact, the file gromacs_xtc.c is a stripped-down version of that GROMACS library file, from which the Fortran interface routines were removed in order to get rid of the architecture dependence of the Fortran interface. The file GromacsTrajectory.pyx is the Python interface, written in Pyrex. For an example, see the script "example.py". Installation: python setup.py build python setup.py install (may require administrator rights) Konrad Hinsen Centre de Biophysique Moleculaire (CNRS Orléans) and Synchtron Soleil (Saint Aubin, France) E-Mail: hinsen@cnrs-orleans.fr