## A simple mpi program which outputs the rank and size of the MPI pool.

Save the following program as say `test.py`.

```
#!/usr/bin/env python
from mpi4py import MPI
from subprocess import call

comm = MPI.COMM_WORLD

print comm.rank, comm.size

#cmd = "processCcd.py DATA --rerun processCcdOutputs --id visit=%d ccd=%d" % (visit, ccd)
cmd = "sleep 120"
call(cmd, shell=1)

```

Run the program using:
```
mpirun python test.py
```