code: def test_dc_slice():
      def f(a, *, nd):
          b = a[:5]
          if nd is mx.nd:
              c = nd.concat(b, b, dim=0)
          else:
              c = nd.concatenate([b, b], axis=0)
          return [c + a]
  
      _all_assert_dc(_dc_simple_setup, f)
  
imports: import functools
  import operator
  import numpy
  import mxnet
  import mxnet._deferred_compute
  from mxnet.base import MXNetError
  from mxnet.util import TemporaryDirectory
  import pytest
label_desc: Use image node_id 13 for calling a global function with example usage: test_dc_slice() and returns: list