code: def __init__(self, act_dim):
      hid1_size = 128
      hid2_size = 128
      # 3层全连接网络
      self.fc1 = layers.fc(size=hid1_size, act="relu")
      self.fc2 = layers.fc(size=hid2_size, act="relu")
      self.fc3 = layers.fc(size=act_dim, act=None)
  
imports: import parl
  from parl import layers
label_desc: Use image node_id 1 to create a new Model object from inherited base classes: parl with example: obj = Model(act_dim)