code: def _get_obs(self):
      position = self.sim.data.qpos.flat.copy()
      velocity = np.clip(self.sim.data.qvel.flat.copy(), -10, 10)
  
      if self._exclude_current_positions_from_observation:
          position = position[1:]
  
      observation = np.concatenate((position, velocity)).ravel()
      return observation
  
file_path: gym/gym/envs/mujoco/walker2d_v3.py
imports: import numpy
  from gym import utils
  from gym.envs.mujoco import MuJocoPyEnv
  from gym.spaces import Box
label_desc: Use image node_id 6 for calling the Walker2dEnv obj's underlying member method code with example usage: obj._get_obs() and returns: observation