code: def _some_slicers(shape):
      ndim = len(shape)
      slicers = np.eye(ndim, dtype=int).astype(object)
      slicers[slicers == 0] = slice(None)
      for i in range(ndim):
          if i % 2:
              slicers[i, i] = -1
          elif shape[i] < 2:  # some proxy examples have length 1 axes
              slicers[i, i] = 0
      # Add a newaxis to keep us on our toes
      no_pos = ndim // 2
      slicers = np.hstack(
          (
              slicers[:, :no_pos],
              np.empty((ndim, 1)),
              slicers[:, no_pos:],
          )
      )
      slicers[:, no_pos] = None
      return [tuple(s) for s in slicers]
  
imports: import unittest
  import warnings
  from io import BytesIO
  from itertools import product
  from os.path import join
  import numpy
  import pytest
  from numpy.testing import assert_allclose, assert_array_equal
  from ..None import ecat, minc1, minc2, parrec
  from ..analyze import AnalyzeHeader
  from ..arrayproxy import ArrayProxy, is_proxy
  from ..casting import have_binary128, sctypes
  from ..externals.netcdf import netcdf_file
  from ..freesurfer.mghformat import MGHHeader
  from ..nifti1 import Nifti1Header
  from ..optpkg import optional_package
  from ..spm2analyze import Spm2AnalyzeHeader
  from ..spm99analyze import Spm99AnalyzeHeader
  from ..testing import assert_dt_equal, clear_and_catch_warnings
  from ..testing import data_path
  from ..tmpdirs import InTemporaryDirectory
  from ..volumeutils import apply_read_scaling
  from .test_api_validators import ValidateAPI
  from .test_parrec import EG_REC, VARY_REC
label_desc: Use image node_id 1 for calling a global function with example usage: _some_slicers(shape) and returns: unknown