def __init__(self, env: gym.Env, replay_buffer: ReplayBuffer) -> None:
        """
        Args:
            env: training environment
            replay_buffer: replay buffer storing experiences
        """
        self.env = env
        self.replay_buffer = replay_buffer
        self.reset()
        self.state = self.env.reset()

        Args:
            env: training environment
            replay_buffer: replay buffer storing experiences
        
examples/pytorch/domain_templates/reinforce_learn_Qnet.py