class_docstr: This is just the gym environment, without extra functionality
class_docstr_tok: ["This","is","just","the","gym","environment",",","without","extra","functionality"]
code: def __init__(self, num_arms) -> None:
      self.seed(0)
      self.num_arms = num_arms
      self.max_steps = MAX_STEPS
  
imports: import random
  import gym
  import numpy
  import reagent.core.types
  import torch
  from reagent.core.dataclasses import dataclass
  from reagent.core.parameters import NormalizationData, NormalizationKey
  from reagent.gym.envs.env_wrapper import EnvWrapper
  from reagent.gym.normalizers import only_continuous_normalizer
label_desc: Use image node_id 1 to create a new ChangingArmsEnv object from inherited base classes: gym with example: obj = ChangingArmsEnv(num_arms)