code: def test_meshwarpmaths(tmpdir):
      tmpdir.chdir()
  
file_path: nipype/nipype/algorithms/tests/test_mesh_ops.py
imports: import os
  import pytest
  import nipype.testing
  from nipype.testing import example_data
  import numpy
  from nipype.algorithms import mesh
  from ...interfaces import vtkbase
label_desc: Use image node_id 4 for calling a global function with example usage: test_meshwarpmaths(tmpdir) without return types