text: class Config:
      def __init__(self, BATCH_SIZE=128,
                   GAMMA=0.999,
                   EPS_START=0.9,
                   EPS_END=0.05,
                   EPS_DECAY=200,
                   TARGET_UPDATE=10):
          # Hyperparameters and utilities
          self.BATCH_SIZE = BATCH_SIZE
          self.GAMMA = GAMMA
          self.EPS_START = EPS_START
          self.EPS_END = EPS_END
          self.EPS_DECAY = EPS_DECAY
          self.TARGET_UPDATE = TARGET_UPDATE
          self.n_actions = None
          self.policy_net = None
          self.target_net = None
  