code: def test_modify_darray():
      for fname in (DATA_FILE1, DATA_FILE2, DATA_FILE5):
          img = load(fname)
          darray = img.darrays[0]
          darray.data[:] = 0
          assert np.array_equiv(darray.data, 0)
  
imports: import shutil
  import sys
  import warnings
  from os.path import basename, dirname
  from os.path import join
  from unittest import mock
  import numpy
  import pytest
  from numpy.testing import assert_array_almost_equal
  from ...loadsave import load, save
  from ...nifti1 import xform_codes
  from ...testing import clear_and_catch_warnings, suppress_warnings
  from ...tmpdirs import InTemporaryDirectory
  from ..None import gifti
  from ..parse_gifti_fast import GiftiImageParser, GiftiParseError
  from ..util import gifti_endian_codes
label_desc: Use image node_id 12 for calling a global function with example usage: test_modify_darray() without return types