code: def gather_from_all_processes(self):
      if not torch.distributed.is_available():
          return
      if not torch.distributed.is_initialized():
          return
      torch.distributed.barrier()
      gather_mae_list = []
      for i in all_gather(self.mae_list):
          gather_mae_list.extend(i)
      self.mae_list = gather_mae_list
  
imports: from collections import defaultdict, deque
  import datetime
  import time
  import torch
  import torch.distributed
  import torch.nn.functional
  import errno
  import os
label_desc: Use image node_id 4 for calling the MeanAbsoluteError obj's underlying member method code with example usage: obj.gather_from_all_processes() without return types