code: def one_point_design():
      return torch.tensor(0.5)
  
imports: from contextlib import ExitStack
  import pytest
  import torch
  import pyro
  import pyro.distributions
  import pyro.optim
  from pyro.contrib.oed.eig import donsker_varadhan_eig, lfire_eig, marginal_eig, marginal_likelihood_eig, nmc_eig, posterior_eig, vnmc_eig
  from pyro.contrib.util import iter_plates_to_shape
  from tests.common import assert_equal
label_desc: Use image node_id 2 for calling a global function with example usage: one_point_design() and returns: torch