code: def is_main_process():
      return get_rank() == 0
  
imports: from collections import defaultdict, deque
  import datetime
  import time
  import torch
  import torch.nn.functional
  import torch.distributed
  import errno
  import os
  from .dice_coefficient_loss import multiclass_dice_coeff, build_target
label_desc: Use image node_id 6 for calling a global function with example usage: is_main_process() and returns: unknown