code: def __init__(self):
      super().__init__()
      self.fc3 = nn.Linear(20, 400)
      self.fc4 = nn.Linear(400, 784)
      self.relu = nn.ReLU()
  
imports: import argparse
  import itertools
  import os
  from abc import ABCMeta, abstractmethod
  import torch
  import torch.nn
  from torch.nn import functional
  from torchvision.utils import save_image
  from utils.mnist_cached import DATA_DIR, RESULTS_DIR
  import pyro
  from pyro.contrib.examples import util
  from pyro.distributions import Bernoulli, Normal
  from pyro.infer import SVI, JitTrace_ELBO, Trace_ELBO
  from pyro.optim import Adam
label_desc: Use image node_id 1 to create a new Decoder object from inherited base classes: nn with example: obj = Decoder()