code: def _round(self, dev=gpu_dev):
      x = tensor.Tensor(shape=(3, 4, 5), device=dev).gaussian(0, 1)
      y = tensor._call_singa_func(singa_api.Round, x.data)
      np.testing.assert_array_almost_equal(
          np.round(tensor.to_numpy(x)), tensor.to_numpy(y)
      )
  
imports: from __future__ import division
  import unittest
  import math
  import numpy
  from singa import singa_wrap
  from singa import tensor
  from cuda_helper import gpu_dev, cpu_dev
label_desc: Use image node_id 43 for calling the TestAPI obj's underlying member method code with example usage: obj._round(dev) without return types