Have you tried using multiple cpu on the Example here in A2C?

I am trying to use multiple cpu for the example provided on this link?

I tried to change the environment to multiple cpu.

env = DummyVecEnv([env_maker for i in range(16)])

But I have a problem in the done and info in stable baselines. It seems they turned into arrays.

There is an error in this code: any suggestions or any of you done this? It seems lstm in stable baselines are like this.

#env = env_maker()
#observation = env.reset()

while True:
    #observation = observation[np.newaxis, ...]

    # action = env.action_space.sample()
    action, _states = model.predict(observation)
    observation, reward, done, info = env.step(action)

    # env.render()
    if done:
        print("info:", info)
        break

------------------------------

Error:

```python
ValueError                                Traceback (most recent call last)
<ipython-input-27-2d78acbb8800> in <module>
     10 
     11     # env.render()
---> 12     if done:
     13         print("info:", info)
     14         break

ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.all()

[AminHP]

Thanks man 😃

Yeah, somehow, but I didn’t override DummyVecEnv itself this time. I inherited a new class from it (DummyVecEnv2) and overrode its reset method.

[toksis]

You are a Guru! It works now. What you did was after learning, override the DummyvecEnv by removing the reset. Am i correct?