code: def validation_enabled(is_validate=True):
      old = is_validation_enabled()
      try:
          enable_validation(is_validate)
          yield
      finally:
          enable_validation(old)
  
imports: import math
  import numbers
  from collections import Counter, defaultdict
  from contextlib import contextmanager
  import torch
  from opt_einsum import shared_intermediates
  from opt_einsum.sharing import count_cached_ops
  from pyro.distributions.util import is_identically_zero
  from pyro.ops import packed
  from pyro.ops.einsum.adjoint import require_backward
  from pyro.ops.rings import MarginalRing
  from pyro.poutine.util import site_is_subsample
  from ..None import settings
label_desc: Use image node_id 3 for calling a global function with example usage: validation_enabled(is_validate) without return types