code: def log(s, nl=True):
      if bps.local_rank() != 0:
          return
      print(s, end="\n" if nl else "")
      sys.stdout.flush()
  
file_path: byteps/example/pytorch/benchmark_byteps.py
imports: from __future__ import print_function
  import argparse
  import torch.backends.cudnn
  import torch.nn.functional
  import torch.optim
  import torch.utils.data.distributed
  from torchvision import models
  import byteps.torch
  import timeit
  import numpy
  import os, sys
label_desc: Use image node_id 2 for calling a global function with example usage: log(s, nl) without return types