code: def __enter__(self):
      if self.caller_id:
          caller_id = self.caller_id
      else:
          stack = traceback.extract_stack()
          caller = stack[-2]
          caller_id = (caller.filename, caller.line)
      self.timer.push(self.label, caller_id)
  
imports: import collections
  import functools
  import timeit
  import traceback
  import weakref
  from json import dumps
  from typing import List
  import numpy
  from .ascii_table import ascii_table
label_desc: Use image node_id 2 for calling the _TimerContextManager obj's underlying member method code with example usage: obj.__enter__() without return types