import gmsh
import sys

gmsh.initialize(sys.argv)

# Copied from discrete.py...
gmsh.model.add("test")
gmsh.model.addDiscreteEntity(2, 1)
gmsh.model.mesh.addNodes(2, 1, [1, 2, 3, 4],
                         [0., 0., 0., 1., 0., 0., 1., 1., 0., 0., 1., 0.])
gmsh.model.mesh.addElements(2, 1, [2], [[1, 2]], [[1, 2, 3, 1, 3, 4]])
# ... end of copy

# Create a new post-processing view
t = gmsh.view.add("some data")

# add 10 steps of model-based data, on the nodes of the mesh
for step in range(0, 10):
    gmsh.view.addModelData(
        t,
        step,
        "test",
        "NodeData",
        [1, 2, 3, 4],  # tags of nodes
        [[10.], [10.], [12. + step], [13. + step]])  # data, per node

gmsh.view.write(t, "data.msh")

gmsh.finalize()