code: def _img_zeros(shape, affine):
      return Nifti1Image(np.zeros(shape), affine)
  
imports: import warnings
  import nibabel
  import numpy
  import pytest
  from nibabel import Nifti1Image
  from nilearn import image
  from nilearn.datasets.tests._testing import request_mocker
  from nilearn.datasets.tests._testing import temp_nilearn_data_dir
  from nilearn.experimental.surface.tests.conftest import make_mini_img, mini_img, mini_mesh
label_desc: Use image node_id 17 for calling a global function with example usage: _img_zeros(shape, affine) and returns: Nifti1Image