code: def prob_and_value(self, obs):
      logits, values = self.model.policy_and_value(obs)
      probs = F.softmax(logits, dim=1)
      return probs, values
  
file_path: PARL/parl/algorithms/torch/a2c.py
imports: import torch
  from torch.distributions import Categorical
  import torch.nn.functional
  import torch.optim
  import numpy
  import parl
  from parl.utils.utils import check_model_method
label_desc: Use image node_id 4 for calling the A2C obj's underlying member method code with example usage: obj.prob_and_value(obs) and returns: probs,  values