code: def __init__(self) -> None:
      self.value: Dict[str, dict] = {}
  
file_path: optuna/tests/multi_objective_tests/samplers_tests/test_motpe.py
imports: from typing import Dict
  from typing import Tuple
  from unittest.mock import Mock
  from unittest.mock import patch
  import pytest
  import optuna
  from optuna import multi_objective
  from optuna.multi_objective.samplers import MOTPEMultiObjectiveSampler
  from optuna.samplers import MOTPESampler
label_desc: Use image node_id 1 to create a new MockSystemAttr object  with example: obj = MockSystemAttr()