docstr: use value model self.model to predict the action value
          
docstr_tok: ["use","value","model","self.model","to","predict","the","action","value"]
code: def predict(self, obs):
      """use value model self.model to predict the action value"""
      return self.model.value(obs)
  
file_path: PARL/benchmark/fluid/offline-Q-learning/dqn.py
imports: import warnings
  import copy
  import paddle.fluid
  from parl.core.fluid.algorithm import Algorithm
  from parl.core.fluid import layers
label_desc: Use image node_id 2 for calling the DQN obj's underlying member method code with example usage: obj.predict(obs) and returns: self