code: def Marginal(fn=None, **kwargs):
      if fn is None:
          return lambda _fn: Marginal(_fn, **kwargs)
      return memoize(
          lambda *args: HashingMarginal(
              BestFirstSearch(fn, **kwargs).run(*args)
          )
      )
  
imports: import argparse
  import collections
  import torch
  from search_inference import BestFirstSearch, HashingMarginal, memoize
  import pyro
  import pyro.distributions
label_desc: Use image node_id 1 for calling a global function with example usage: Marginal(fn) and returns: memoize, function