class_docstr: Dynamic Policy Programming.
  
  See: https://arxiv.org/abs/1004.2027.
class_docstr_tok: ["Dynamic","Policy","Programming",".","See",":","https",":","\/\/arxiv.org\/abs\/1004.2027","."]
code: def _l_operator(self, qout):
      raise NotImplementedError()
  
imports: from abc import ABCMeta, abstractmethod
  import torch
  from pfrl.agents.dqn import DQN
  from pfrl.utils.recurrent import pack_and_forward
label_desc: Use image node_id 1 for calling the AbstractDPP obj's underlying member method code with example usage: obj._l_operator(qout) without return types