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Info: I am using OpenAI Gym to create RL environments but need multiple copies of an environment for something I am doing. I do not want to do anything like [gym.make(...) for i in range(2)] to make a new environment.
Question: Given one gym env what is the best way to make a copy of it so that you have 2 duplicate but disconnected envs?
Here is an example:
import gym
env = gym.make("CartPole-v0")
new_env = # NEED COPY OF ENV HERE
env.reset() # Should not alter new_env
Astariul has an updated answer::
Their answer states:
import copy
env_2 = copy.deepcopy(env)
For more info about 'copy.deepcopy', and the copy library
You can use copy.deepcopy() to copy the current environment :
import gym
import copy
env = gym.make("CartPole-v0")
env.reset()
env_2 = copy.deepcopy(env)
env.step() # Stepping through `env` will not alter `env_2`
However note that this solution might not work in case of custom environment, if it contains things that can't be deepcopied (like generators).