code: def pi_and_v(self, state):
      out = self.head(state)
      return self.pi(out), self.v(out)
  
imports: import argparse
  import functools
  import logging
  import chainer
  import numpy
  import chainerrl
  from chainerrl.agents import a2c
  from chainerrl import experiments
  from chainerrl import links
  from chainerrl import misc
  from chainerrl.optimizers.nonbias_weight_decay import NonbiasWeightDecay
  from chainerrl.optimizers import rmsprop_async
  from chainerrl import policy
  from chainerrl import v_function
  from chainerrl.wrappers import atari_wrappers
label_desc: Use image node_id 2 for calling the A2CFF obj's underlying member method code with example usage: obj.pi_and_v(state) and returns: self,  self