input: Write a python function to convert a given JSON object to a python dictionary.
  assert convert_json_to_dict('{"name": "John", "age": 30, "hobbies": ["soccer", "playing guitar"]}') == {"name": "John", "age": 30, "hobbies": ["soccer", "playing guitar"]}
  assert convert_json_to_dict('{"name": "Alice", "age": 25, "hobbies": ["painting", "cycling"]}') == {"name": "Alice", "age": 25, "hobbies": ["painting", "cycling"]}
  assert convert_json_to_dict('{"company": "TechCorp", "employees": 1000}') == {"company": "TechCorp", "employees": 1000}
output: def convert_json_to_dict(json_str):
      import json
      return json.loads(json_str)