code: def test_proxy_slicing(n_dim, offset):
      shape = (15, 16, 17)[:n_dim]
      arr = np.arange(np.prod(shape)).reshape(shape)
      hdr = Nifti1Header()
      hdr.set_data_offset(offset)
      hdr.set_data_dtype(arr.dtype)
      hdr.set_data_shape(shape)
      for order, klass in ("F", ArrayProxy), ("C", CArrayProxy):
          fobj = BytesIO()
          fobj.write(b"\0" * offset)
          fobj.write(arr.tobytes(order=order))
          prox = klass(fobj, hdr)
          assert prox.order == order
          for sliceobj in slicer_samples(shape):
              assert_array_equal(arr[sliceobj], prox[sliceobj])
  
imports: import contextlib
  import gzip
  import pickle
  from io import BytesIO
  from unittest import mock
  import numpy
  import pytest
  from numpy.testing import assert_array_almost_equal, assert_array_equal
  from packaging.version import Version
  from ..None import __version__
  from ..arrayproxy import ArrayProxy, get_obj_dtype, is_proxy, reshape_dataobj
  from ..deprecator import ExpiredDeprecationError
  from ..nifti1 import Nifti1Header, Nifti1Image
  from ..openers import ImageOpener
  from ..testing import memmap_after_ufunc
  from ..tmpdirs import InTemporaryDirectory
  from .test_fileslice import slicer_samples
  from .test_openers import patch_indexed_gzip
label_desc: Use image node_id 5 for calling a global function with example usage: test_proxy_slicing(n_dim, offset) without return types