class_docstr: Context manager for timing.
class_docstr_tok: ["Context","manager","for","timing","."]
code: def __enter__(self):
      self.t0 = time.time()
  
imports: import asyncio
  import datetime
  import logging
  import math
  import signal
  import sys
  import time
  from dataclasses import fields, is_dataclass
  from typing import AsyncIterator, Awaitable, Callable, Iterator, List, Optional, Union
  import eventkit
label_desc: Use image node_id 2 for calling the timeit obj's underlying member method code with example usage: obj.__enter__() without return types