old_contents: import os
  
  import numpy
  import pytest
  
  import helpers
  import meshio
  
  
  @pytest.mark.parametrize(
      "mesh",
      [
          helpers.tri_mesh,
          helpers.quad_mesh,
          helpers.tri_quad_mesh,
          helpers.tet_mesh,
          helpers.hex_mesh,
      ],
  )
  def test(mesh):
      helpers.write_read(meshio.avsucd.write, meshio.avsucd.read, mesh, 1.0e-15)
  
new_contents: import pytest
  
  import helpers
  import meshio
  
  
  @pytest.mark.parametrize(
      "mesh",
      [
          helpers.tri_mesh,
          helpers.quad_mesh,
          helpers.tri_quad_mesh,
          helpers.tet_mesh,
          helpers.hex_mesh,
      ],
  )
  def test(mesh):
      helpers.write_read(meshio.avsucd.write, meshio.avsucd.read, mesh, 1.0e-15)
  
subject: remove unused packages