source: codes/icosagcm/devel/Python/test/py/test_xios.py

from dynamico import unstructured as unst
from dynamico import xios
from dynamico.meshes import radian, MPAS_Format, Unstructured_PMesh as PMesh, Local_Mesh as Mesh
import numpy as np

with xios.Client() as client:    
    comm = client.comm
    mpi_rank, mpi_size = comm.Get_rank(), comm.Get_size()
    print '%d/%d starting'%(mpi_rank,mpi_size)

#----------------------------- read MPAS mesh --------------------------------

    grid, llm, nqdyn, nqtot = 2562, 4,1,1 # 2562, 10242, 40962  
    Omega, radius, g, gh0 = 2.*np.pi/86400., 6.4e6, 1., 2.94e4
    N, T, courant = 40, 10800., 1.2 # simulation length = N*T
    print 'Omega, planetary PV', Omega, 2*Omega/gh0

    def f(lon,lat): return 2*Omega*np.sin(lat) # Coriolis parameter                                                                                                                
    print 'Reading MPAS mesh ...'
    meshfile = MPAS_Format('grids/x1.%d.grid.nc'%grid)
    pmesh = PMesh(comm,meshfile)
    pmesh.partition_metis()
    mesh = Mesh(pmesh, llm, nqdyn, radius, f)
    print '...Done'

#--------------------------------- write some data ----------------------------------------

    with xios.Context_Unstructured(pmesh,mesh,nqtot, 3600) as context:
        lat_i = radian*mesh.lat_i
        lat_ik, junk  = np.meshgrid(lat_i, np.arange(llm), indexing='ij')

        for i in range(100):
            context.update_calendar(i)
            print 'send_field', i, lat_ik.shape
            context.send_field_primal('ps', lat_i)
            context.send_field_primal('theta', lat_ik)