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One can also do this same command from the command line using the "--wrap" option for sbatch.  Here we use the short forms of the sbatch options, but the longer (and clearer) versions above can be used as well ("-N" is "nodes" above, and "-n" is "ntasks-per-node" above).:

sbatch -p psfehq --Nnodes 2 --ntasks-per-nnode 3 --wrap="mpirun python mpi_simpletest.py"

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