code: def __call__(self, blockno, readsize, totalsize):
      if self.t is None:
          self.t = tqdm.tqdm(total=totalsize)
      self.t.update(readsize)
  
file_path: dgl/examples/pytorch/metapath2vec/download.py
imports: import os
  import torch
  import torch.nn
  import tqdm
label_desc: Use image node_id 2 for calling the PBar obj's underlying member method code with example usage: obj.__call__(blockno, readsize, totalsize) without return types