The seed() function is broken

The seeds are not consistent across environment instances. This means there’s some other source of non-determinism. I’m guessing this means that contestants have access to unlimited seeds…

Demo script:

import os

from obstacle_tower_env import ObstacleTowerEnv

counter = {}
for i in range(0, 25):
    env = ObstacleTowerEnv('./ObstacleTower/obstacletower.x86_64', worker_id=i)
    env.seed(25)
    env.reset()
    for _ in range(50):
        obs, _, _, _ = env.step(0)
    key = str(obs.flatten().tolist())
    counter[key] = True
    print('got %d start states' % len(counter))
    env.close()

In older versions of the environment, this script works pretty much as expected.

[awjuliani]

Hi all,

We’ve have just pushed the v2.1 release which aims to fix this. Please let us know if you still run into an issue.

[SungbinChoi]

Hi @awjuliani I see. I didn’t know that tower-seed value range is limited to 100 in Round 2. Thanks~