code: def _get_data(self, ndim):
      x_shape = (2, 3) + (3,) * ndim
      dtype = numpy.float32
  
      x = numpy.random.uniform(-1, 1, x_shape).astype(dtype)
      ksize = (2,) * ndim
  
      return x, ksize
  
imports: import itertools
  import unittest
  import numpy
  import six
  import chainer
  from chainer import backend
  from chainer import functions
  from chainer import testing
  from chainer.utils import conv
  from chainer.utils import type_check
label_desc: Use image node_id 1 for calling the TestUnpoolingNDWrappers obj's underlying member method code with example usage: obj._get_data(ndim) and returns: x,  ksize