This is the Computational Infrastructure for Geodynamics (CIG) fork of nemesis originally written by Michael Aivazis (California Institute of Technology).
Nemesis provides Python with an interface to the Mesasge Passing Interface. The nemesis executable comes in two forms:
nemesis
: Python linked to the MPI library but without initialization of MPI.
mpinemesis
: Python linked to the MPI library with initialization of MPI.
See CHANGES for a list of changes for recent releases.