code: def forward(self, obs):
      hid1 = F.tanh(self.fc1(obs))
      hid2 = F.tanh(self.fc2(hid1))
      means = self.fc3(hid2)
      return means
  
file_path: PARL/examples/ES/mujoco_model.py
imports: import numpy
  import paddle
  import paddle.nn
  import paddle.nn.functional
  import parl
label_desc: Use image node_id 2 for calling the MujocoModel obj's underlying member method code with example usage: obj.forward(obs) and returns: means