code: def _product(factors):
      result = 1.0
      for factor in factors:
          result = result * factor
      return result
  
file_path: pyro/pyro/contrib/tracking/assignment.py
imports: import itertools
  import math
  import numbers
  import torch
  import pyro.distributions
  from pyro.util import warn_if_nan
label_desc: Use image node_id 1 for calling a global function with example usage: _product(factors) and returns: result