code: def test_non_dict_in_list(self):
      content = ["string", {"type": "text", "text": "text"}]
      with self.assertRaises(TypeError):
          content_str(content)
  
imports: import importlib.metadata
  import os
  import sys
  import unittest
  import pytest
  import autogen
  from autogen.code_utils import PATH_SEPARATOR, UNKNOWN, WIN32, content_str, execute_code, extract_code, improve_code, improve_function, infer_lang
label_desc: Use image node_id 6 for calling the TestContentStr obj's underlying member method code with example usage: obj.test_non_dict_in_list() without return types