code: def __init__(self, latent_dim=4, obs_dim=2, nhidden=20):
      super(Decoder, self).__init__()
      self.relu = nn.ReLU(inplace=True)
      self.fc1 = nn.Linear(latent_dim, nhidden)
      self.fc2 = nn.Linear(nhidden, obs_dim)
  
imports: import os
  import argparse
  import logging
  import time
  import numpy
  import numpy.random
  import matplotlib
  import matplotlib.pyplot
  import torch
  import torch.nn
  import torch.optim
  import torch.nn.functional
label_desc: Use image node_id 1 to create a new Decoder object from inherited base classes: nn with example: obj = Decoder(latent_dim, obs_dim, nhidden)