code: def forward(self, obs):
      return torch.squeeze(self.v_net(obs), -1)
  
file_path: spinningup/spinup/exercises/pytorch/problem_set_1/exercise1_2_auxiliary.py
imports: import torch
  import torch.nn
  import numpy
label_desc: Use image node_id 2 for calling the MLPCritic obj's underlying member method code with example usage: obj.forward(obs) and returns: torch