code: def __init__(
      self,
      levels: Union[str, List[str], Dict[str, str]],
      force_lower=True,
  ):
      super().__init__(None)
      self.levels = levels
      if isinstance(levels, list):
          self.levels = {level: level for level in levels}
      if isinstance(levels, str):
          self.levels = {levels: levels}
      self.force_lower = force_lower
  
imports: import operator
  import time
  from collections import OrderedDict
  from typing import Union, List, Tuple, Dict
  import numpy
  from rl_coach import logger
  from rl_coach.base_parameters import Parameters
  from rl_coach.base_parameters import VisualizationParameters
  from rl_coach.core_types import GoalType, ActionType, EnvResponse, RunPhase
  from rl_coach.environments.environment_interface import EnvironmentInterface
  from rl_coach.logger import screen
  from rl_coach.renderer import Renderer
  from rl_coach.spaces import ActionSpace, ObservationSpace, DiscreteActionSpace, RewardSpace, StateSpace
  from rl_coach.utils import squeeze_list, force_list
label_desc: Use image node_id 1 to create a new SingleLevelSelection object from inherited base classes: LevelSelection with example: obj = SingleLevelSelection(levels, force_lower)