meshio physical names test

test.py

#! /usr/bin/env python2

if __name__ == '__main__':
    import sys
    import meshio
    mesh = meshio.read('triangle_pipe.msh', 'gmsh-ascii')
    meshio.write('triangle_pipe.vtu', *mesh)

triangle_pipe.msh

$MeshFormat
2.2 0 8
$EndMeshFormat
$Nodes
6
1 0 0 0
2 1 0 0
3 0 1 0
4 0 0 1
5 1 0 1
6 0 1 1
$EndNodes
$Elements
11
1 2 2 1 21 1 2 3
2 2 2 3 29 4 1 5
3 2 2 3 29 1 2 5
4 2 2 3 33 5 2 6
5 2 2 3 33 2 3 6
6 2 2 3 37 6 3 1
7 2 2 3 37 6 1 4
8 2 2 2 38 4 5 6
9 4 2 4 1 1 2 3 6
10 4 2 4 1 5 4 6 1
11 4 2 4 1 2 1 5 6
$EndElements