code: def is_rank_0():
      """Check whether it is rank 0."""
      if torch.distributed.is_initialized():
          if torch.distributed.get_rank() == 0:
              return True
          else:
              return False
      else:
          return True
  
imports: import os
  import torch
  import random
  import numpy
  from transformers import set_seed, AutoTokenizer
  import json
  import deepspeed
  from deepspeed.runtime.zero.partition_parameters import ZeroParamStatus
  from deepspeed.accelerator import get_accelerator
  import torch.nn
label_desc: Use image node_id 2 for calling a global function with example usage: is_rank_0() and returns: True, True, False