code: def _get_obs(self):
      self.observation = np.zeros((self.chain_length,))
      if self.observation_type == self.ObservationType.OneHot:
          self.observation[self.state] = 1
      elif self.observation_type == self.ObservationType.Therm:
          self.observation[: (self.state + 1)] = 1
  
      return self.observation
  
file_path: coach/rl_coach/environments/toy_problems/exploration_chain.py
imports: from enum import Enum
  import gym
  import numpy
  from gym import spaces
label_desc: Use image node_id 6 for calling the ExplorationChain obj's underlying member method code with example usage: obj._get_obs() and returns: self