code: def test_constructor():
      pytest.raises(ValueError, VolumeGrid, None, None, {}, "e")
  
file_path: nipy/nipy/labs/datasets/volumes/tests/test_volume_grid.py
imports: import copy
  import numpy
  import pytest
  from ...transforms.transform import CompositionError, Transform
  from ..volume_grid import VolumeGrid
  from ..volume_img import VolumeImg
label_desc: Use image node_id 4 for calling a global function with example usage: test_constructor() without return types