code: def __enter__(self):
      self.start = time.time()
      return self
  
file_path: kafka-python/test/testutil.py
imports: from __future__ import absolute_import
  import os
  import random
  import re
  import string
  import time
label_desc: Use image node_id 1 for calling the Timer obj's underlying member method code with example usage: obj.__enter__() and returns: self