code: def __exit__(self, *args, **kwargs):
      assert PYRO_STACK[-1] is self
      PYRO_STACK.pop()
  
imports: import random
  import warnings
  import weakref
  from collections import OrderedDict
  import numpy
  import torch
  from pyro.distributions import validation_enabled
label_desc: Use image node_id 3 for calling the Messenger obj's underlying member method code with example usage: obj.__exit__() without return types