code: def all_gather(x, dim=0):
      xs = [torch.zeros_like(x) for _ in range(dist.get_world_size())]
      dist.all_gather(xs, x)
      return torch.cat(xs, dim=dim)
  
imports: from .inception_v3 import InceptionV3
  import blobfile
  import torch
  import torch.distributed
  import torch.nn
  from cm import dist_util
  import numpy
  import warnings
  from scipy import linalg
  from PIL import Image
  from tqdm import tqdm
label_desc: Use image node_id 2 for calling a global function with example usage: all_gather(x, dim) and returns: torch