code: def __enter__(self):
      if self.device == "cuda:0":
          self.start_event = torch.cuda.Event(enable_timing=True)
          self.end_event = torch.cuda.Event(enable_timing=True)
          self.start_event.record()
      else:
          self.tic = self.timer()
      return self
  
imports: import inspect
  import json
  import os
  import pickle
  import shutil
  import time
  import zipfile
  from functools import partial, reduce, wraps
  from timeit import default_timer
  import dgl
  import numpy
  import pandas
  import requests
  import torch
  from ogb.nodeproppred import DglNodePropPredDataset
  import traceback
  from _thread import start_new_thread
  import torch.multiprocessing
label_desc: Use image node_id 2 for calling the Timer obj's underlying member method code with example usage: obj.__enter__() and returns: self