code: def test_delete():
      m = PyroModule()
      m.a = PyroParam(torch.tensor(1.0))
      del m.a
      m.a = PyroParam(torch.tensor(0.1))
      assert_equal(m.a.detach(), torch.tensor(0.1))
  
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 5 for calling a global function with example usage: test_delete() without return types