code: def __init__(self, size):
      super().__init__()
      self.x = PyroParam(torch.zeros(size))
      self.y = PyroParam(lambda: torch.randn(size))
      self.z = PyroParam(
          torch.ones(size), constraint=constraints.positive, event_dim=1
      )
      self.s = PyroSample(dist.Normal(0, 1))
      self.t = PyroSample(lambda self: dist.Normal(self.s, self.z))
  
imports: import io
  import warnings
  import pytest
  import torch
  from torch import nn
  from torch.distributions import constraints, transform_to
  import pyro
  import pyro.distributions
  from pyro import poutine
  from pyro.infer import SVI, Trace_ELBO
  from pyro.nn.module import PyroModule, PyroParam, PyroSample, clear, to_pyro_module_
  from pyro.optim import Adam
  from tests.common import assert_equal
label_desc: Use image node_id 1 to create a new AttributeModel object from inherited base classes: PyroModule with example: obj = AttributeModel(size)