code: def test_on_gpu(self):
      top_k_acc = TopKAccuracy(3)
      top_k_acc.cuda()
      actual = top_k_acc(self.predictions.cuda(), self.targets.cuda())
      self.assertEqual((), actual.shape)
      np.testing.assert_almost_equal(
          self.top_k_acc, actual.cpu(), decimal=5
      )
  
imports: from unittest import TestCase, skipIf
  import numpy
  import torch
  from poutyne import Accuracy, BinaryAccuracy, TopKAccuracy, acc, bin_acc, topk
label_desc: Use image node_id 11 for calling the TopKAccuracyTest obj's underlying member method code with example usage: obj.test_on_gpu() without return types