code: def seed(self, seed=None):
      self.np_random, seed = seeding.np_random(seed)
      return [seed]
  
file_path: PARL/examples/tutorials/parl2_dygraph/lesson5/ddpg/env.py
imports: import math
  import gym
  from gym import spaces, logger
  from gym.utils import seeding
  import numpy
label_desc: Use image node_id 2 for calling the ContinuousCartPoleEnv obj's underlying member method code with example usage: obj.seed(seed) and returns: list