For getting pyMPI ported to new machines, for
debugging, and for overally utility I think it would be
useful to have a python-only mpi Module that implements
all the MPI operations as single-processor null ops:
that is, you may run a pyMPI program in normal python
(not pyMPI*), but only as a single process; but you do
not need MPI installed.
I have attached the minimal possible wrapper: it gets
examples/fractal.py working and that's it.
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