code: def test_none(self):
      top_k_acc = TopKAccuracy(3, reduction="none")
      actual = top_k_acc(self.predictions, self.targets)
      self.assertEqual(self.targets.shape, actual.shape)
      self.assertTrue(torch.all(self.top_k_acc_none == actual))
  
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 8 for calling the TopKAccuracyTest obj's underlying member method code with example usage: obj.test_none() without return types