code: def queue(
      fn=None,
      queue=None,
      max_tries=None,
      extend_fn=None,
      escape_fn=None,
      num_samples=None,
  ):
      """
      Used in sequential enumeration over discrete variables.
  
      Given a stochastic function and a queue,
      return a return value from a complete trace in the queue.
  
      :param fn: a stochastic function (callable containing Pyro primitive calls)
      :param queue: a queue data structure like multiprocessing.Queue to hold partial traces
      :param max_tries: maximum number of attempts to compute a single complete trace
      :param extend_fn: function (possibly stochastic) that takes a partial trace and a site,
          and returns a list of extended traces
      :param escape_fn: function (possibly stochastic) that takes a partial trace and a site,
          and returns a boolean value to decide whether to exit
      :param num_samples: optional number of extended traces for extend_fn to return
      :returns: stochastic function decorated with poutine logic
      """
  
      if max_tries is None:
          max_tries = int(1e6)
  
      if extend_fn is None:
          extend_fn = util.enum_extend
  
      if escape_fn is None:
          escape_fn = util.discrete_escape
  
      if num_samples is None:
          num_samples = -1
  
      def wrapper(wrapped):
          def _fn(*args, **kwargs):
              for i in range(max_tries):
                  assert (
                      not queue.empty()
                  ), "trying to get() from an empty queue will deadlock"
  
                  next_trace = queue.get()
                  try:
                      ftr = trace(
                          escape(
                              replay(
                                  wrapped, trace=next_trace
                              ),  # noqa: F821
                              escape_fn=functools.partial(
                                  escape_fn, next_trace
                              ),
                          )
                      )
                      return ftr(*args, **kwargs)
                  except NonlocalExit as site_container:
                      site_container.reset_stack()
                      for tr in extend_fn(
                          ftr.trace.copy(),
                          site_container.site,
                          num_samples=num_samples,
                      ):
                          queue.put(tr)
  
              raise ValueError(
                  "max tries ({}) exceeded".format(str(max_tries))
              )
  
          return _fn
  
      return wrapper(fn) if fn is not None else wrapper
  
imports: import collections
  import functools
  from typing import Callable, Iterable, Optional, TypeVar, Union, overload
  from typing_extensions import ParamSpec
  from pyro.poutine import util
  from .block_messenger import BlockMessenger
  from .broadcast_messenger import BroadcastMessenger
  from .collapse_messenger import CollapseMessenger
  from .condition_messenger import ConditionMessenger
  from .do_messenger import DoMessenger
  from .enum_messenger import EnumMessenger
  from .escape_messenger import EscapeMessenger
  from .infer_config_messenger import InferConfigMessenger
  from .lift_messenger import LiftMessenger
  from .markov_messenger import MarkovMessenger
  from .mask_messenger import MaskMessenger
  from .reparam_messenger import ReparamMessenger
  from .replay_messenger import ReplayMessenger
  from .runtime import NonlocalExit
  from .scale_messenger import ScaleMessenger
  from .seed_messenger import SeedMessenger
  from .substitute_messenger import SubstituteMessenger
  from .trace_messenger import TraceMessenger
  from .uncondition_messenger import UnconditionMessenger
label_desc: Use image node_id 19 for calling a global function with example usage: queue(fn, queue, max_tries, extend_fn, escape_fn, num_samples) and returns: unknown, _fn, ftr