code: def get_world_size():
      if not is_dist_avail_and_initialized():
          return 1
      return dist.get_world_size()
  
imports: from collections import defaultdict, deque
  import datetime
  import pickle
  import time
  import errno
  import os
  from contextlib import contextmanager
  import torch
  import torch.distributed
label_desc: Use image node_id 7 for calling a global function with example usage: get_world_size() and returns: dist, int