def comm_split(comm, color, key=0):
"""
new_comm = comm_split( comm, color, key )
color: all processors that call comm_split with the same color will be put
into the same communicator.
key: determines the order of the processors in the new communicator
"""
new_comm = core.comm_split( comm, color, key )
if new_comm == core.MPI_COMM_NULL:
return None
return Communicator( new_comm )
def comm_split(color, key = 0, comm=core.MPI_COMM_WORLD ):
"""
"""
return Communicator( core.comm_split(color,key, comm) )