class_docstr: Time context manager for code block
      with timer():
          do something
      timer.get()
class_docstr_tok: ["Time","context","manager","for","code","block","with","timer","(",")",":","do","something","timer.get","(",")"]
code: def __exit__(self, exc_type, exc_val, exc_tb):
      if self.named:
          timer.NAMED_TAPE[self.named] += timer.time() - self.start
      else:
          self.tape.append(timer.time() - self.start)
  
imports: import paddle
  from paddle import nn, optimizer
  import numpy
  from paddle import log
  from dataloader import BasicDataset
  from paddle.io import Dataset
  from time import time
  from sklearn.metrics import roc_auc_score
  import random
  import os
  from tqdm import tqdm
label_desc: Use image node_id 6 for calling the timer obj's underlying member method code with example usage: obj.__exit__(exc_type, exc_val, exc_tb) without return types