code: def __enter__(self):
      self.t = None
      return self
  
file_path: dgl/examples/pytorch/metapath2vec/download.py
imports: import os
  import torch
  import torch.nn
  import tqdm
label_desc: Use image node_id 1 for calling the PBar obj's underlying member method code with example usage: obj.__enter__() and returns: self