code: def num_workers():
      """
      Get the total number of workers.
      """
      if not is_distributed():
          return 1
      else:
          return dist.get_world_size()
  
file_path: ParlAI/parlai/utils/distributed.py
imports: import builtins
  import copy
  import os
  import pickle
  import contextlib
  import subprocess
  import socket
  import parlai.utils.logging
label_desc: Use image node_id 2 for calling a global function with example usage: num_workers() and returns: int, dist