code: def test_config_from_string(self):
      c = GPT2Config()
  
      # attempt to modify each of int/float/bool/str config records and verify they were updated
      n_embd = c.n_embd + 1  # int
      resid_pdrop = c.resid_pdrop + 1.0  # float
      scale_attn_weights = not c.scale_attn_weights  # bool
      summary_type = c.summary_type + "foo"  # str
      c.update_from_string(
          f"n_embd={n_embd},resid_pdrop={resid_pdrop},scale_attn_weights={scale_attn_weights},summary_type={summary_type}"
      )
      self.assertEqual(n_embd, c.n_embd, "mismatch for key: n_embd")
      self.assertEqual(
          resid_pdrop, c.resid_pdrop, "mismatch for key: resid_pdrop"
      )
      self.assertEqual(
          scale_attn_weights,
          c.scale_attn_weights,
          "mismatch for key: scale_attn_weights",
      )
      self.assertEqual(
          summary_type, c.summary_type, "mismatch for key: summary_type"
      )
  
imports: 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
  from requests.exceptions import HTTPError
  from transformers import AutoConfig, BertConfig, GPT2Config
  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 1 for calling the ConfigTestUtils obj's underlying member method code with example usage: obj.test_config_from_string() without return types