code: def __enter__(self):
      super().__enter__()
      self.trace = OrderedDict()
      return self.trace
  
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 1 for calling the trace obj's underlying member method code with example usage: obj.__enter__() and returns: self