same random seed for train_env and test_env

[Wang4758]

Hi there,

I have two questions regarding the test_env:

1. Why did you only have test_env for sac, not for ppo and trpo?
2. In safe_rl.sac.sac.py line 273 you set the seeds of env and test_env using the same seeds, then test_env would be the same as the training envs, right? Is the purpose of test_env only testing the deterministic actions, not at all the generalization of the policy?

# Setting seeds
    tf.set_random_seed(seed)
    np.random.seed(seed)
    env.seed(seed)
    test_env.seed(seed)

Thank you very much in advance.