class_docstr: Test the config system.
class_docstr_tok: ["Test","the","config","system","."]
docstr: Test setting an invalid config section.
code: def test_invalid_config_section(self):
      """Test setting an invalid config section."""
      with self.assertRaises(AssertionError):
          config._create_option("mySection.myParam")
  
imports: import copy
  import os
  import textwrap
  import unittest
  from unittest.mock import MagicMock, mock_open, patch
  import pytest
  from parameterized import parameterized
  from streamlit import config, env_util
  from streamlit.config_option import ConfigOption
  from streamlit.errors import StreamlitAPIException
label_desc: Use image node_id 9 for calling the ConfigTest obj's underlying member method code with example usage: obj.test_invalid_config_section() without return types