code: def test_does_not_divide_by_zero_with_no_count(self):
      accuracy = CategoricalAccuracy()
      self.assertAlmostEqual(accuracy.get_metric(), 0.0)
  
imports: from __future__ import division
  from __future__ import with_statement
  from __future__ import absolute_import
  import torch
  import pytest
  import numpy
  from allennlp.common.testing import AllenNlpTestCase
  from allennlp.common.checks import ConfigurationError
  from allennlp.training.metrics import CategoricalAccuracy
label_desc: Use image node_id 10 for calling the CategoricalAccuracyTest obj's underlying member method code with example usage: obj.test_does_not_divide_by_zero_with_no_count() without return types