code: def reduce_value(value, average=True):
      world_size = get_world_size()
      if world_size < 2:  # one gpu
          return value
      with torch.no_grad():
          dist.all_reduce(value)
          if average:
              value /= world_size
          return value
  
imports: import random
  from typing import NamedTuple, Any, Generator, Callable, Dict, Union
  from collections.abc import Mapping
  from enum import Enum
  import numpy
  import torch
  import os
  from pathlib import Path
  import torch.distributed
  from torch import nn
label_desc: Use image node_id 5 for calling a global function with example usage: reduce_value(value, average) and returns: value, value