code: def create_and_test_config_with_num_labels(self):
      config = self.config_class(**self.inputs_dict, num_labels=5)
      self.parent.assertEqual(len(config.id2label), 5)
      self.parent.assertEqual(len(config.label2id), 5)
  
      config.num_labels = 3
      self.parent.assertEqual(len(config.id2label), 3)
      self.parent.assertEqual(len(config.label2id), 3)
  
imports: import copy
  import json
  import os
  import shutil
  import sys
  import tempfile
  import unittest
  import unittest.mock
  from pathlib import Path
  from huggingface_hub import HfFolder, delete_repo, set_access_token
  from requests.exceptions import HTTPError
  from transformers import AutoConfig, BertConfig, GPT2Config, is_torch_available
  from transformers.configuration_utils import PretrainedConfig
  from transformers.testing_utils import TOKEN, USER, is_staging_test
  from test_module.custom_configuration import CustomConfig
label_desc: Use image node_id 7 for calling the ConfigTester obj's underlying member method code with example usage: obj.create_and_test_config_with_num_labels() without return types