MPI question

Question

I was wondering if it was possible to run parts of the python file in parallel and then others sequentially?

Answer 1

You can try inserting something like (untested):

comm = mpi_comm_world()
mpiRank = MPI.rank(comm)
if mpiRank ==0:
   print 'hello'

Each MPI process has a unique MPI 'rank', which is stored in mpiRank in the above. Then you can use an if statement to tell different processes to do different things.