code: def test_on_gpu(self):
      accuracy = Accuracy()
      accuracy.cuda()
      actual = accuracy(self.predictions.cuda(), self.targets.cuda())
      self.assertEqual((), actual.shape)
      np.testing.assert_almost_equal(self.accuracy, actual.cpu())
  
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 AccuracyTest obj's underlying member method code with example usage: obj.test_on_gpu() without return types