code: def forward(self, obs):
      hid = F.relu(self.l1(obs))
      means = paddle.tanh(self.l2(hid))
      return means
  
file_path: PARL/examples/tutorials/parl2_dygraph/lesson5/ddpg/model.py
imports: import parl
  import paddle
  import paddle.nn
  import paddle.nn.functional
label_desc: Use image node_id 2 for calling the Actor obj's underlying member method code with example usage: obj.forward(obs) and returns: means