meshio-convert gmsh to dolfin-xml missing files about meshio HOT 7 CLOSED

import pygmsh as pg
import meshio

geom = pg.Geometry()

P_00 = geom.add_point([0.0, 0.0, 0.0], 1)
P_01 = geom.add_point([1.0, 0.0, 0.0], 1)
P_02 = geom.add_point([1.0, 1.0, 0.0], 1)
P_03 = geom.add_point([0.0, 1.0, 0.0], 1)

line_0 = geom.add_line(P_00, P_01)
line_1 = geom.add_line(P_00, P_02)
line_2 = geom.add_line(P_00, P_03)
line_3 = geom.add_line(P_01, P_02)
line_4 = geom.add_line(P_02, P_03)

ll_01 = geom.add_line_loop([line_0, line_3, -line_1])
ll_02 = geom.add_line_loop([line_1, line_4, -line_2])

s_01 = geom.add_plane_surface(ll_01)
s_02 = geom.add_plane_surface(ll_02)
p_01 = geom.add_physical_surface(s_01)
p_02 = geom.add_physical_surface(s_02)

points, cells, point_data, cell_data, field_data =    pg.generate_mesh(geom, num_quad_lloyd_steps=0, num_lloyd_steps=0)

meshio.write('mwe.xml', points, cells, cell_data=cell_data)

from dolfin import *

try:
    mesh = Mesh("mwe.xml")
    subdomains = MeshFunction("int", mesh, "mwe_physical.xml")
    dx = dx(domain=mesh, subdomain_data=subdomains)
    print(assemble(1*dx))
except Exception as e:
    print("EXCEPTION OCCURRED:")
    print(e)


try:
    mesh = Mesh("mwe.xml")
    subdomains = MeshFunction("size_t", mesh, "mwe_physical.xml")
    dx = dx(domain=mesh, subdomain_data=subdomains)
    print(assemble(1*dx))
except Exception as e:
    print("EXCEPTION OCCURRED:")
    print(e)

cell_data['triangle']['geometrical'] = \
    cell_data['triangle']['geometrical'].astype(numpy.dtype('uint'))
cell_data['triangle']['physical'] = \
    cell_data['triangle']['physical'].astype(numpy.dtype('uint'))