class_docstr: Test Streamlit utility functions.
class_docstr_tok: ["Test","Streamlit","utility","functions","."]
code: def test_lower_clean_dict_keys(self, input_dict, answer_dict):
      return_dict = util.lower_clean_dict_keys(input_dict)
      self.assertEqual(return_dict, answer_dict)
  
file_path: streamlit/lib/tests/streamlit/util_test.py
imports: import random
  import unittest
  from typing import Dict, List, Set
  from unittest.mock import patch
  import numpy
  from parameterized import parameterized
  from streamlit import util
label_desc: Use image node_id 5 for calling the UtilTest obj's underlying member method code with example usage: obj.test_lower_clean_dict_keys(input_dict, answer_dict) without return types