## mpiexec -n 1 python ex-2.35.py # Calls to attach and detach buffers # -------------------------------------------------------------------- from mpi4py import MPI try: from numpy import empty except ImportError: from array import array def empty(size, dtype): return array(dtype, [0]*size) # -------------------------------------------------------------------- BUFSISE = 10000 + MPI.BSEND_OVERHEAD buff = empty(BUFSISE, dtype='b') MPI.Attach_buffer(buff) buff2 = MPI.Detach_buffer() MPI.Attach_buffer(buff2) MPI.Detach_buffer() # -------------------------------------------------------------------- assert len(buff2) == BUFSISE # --------------------------------------------------------------------