code: def __exit__(self, *args):
      for k in Context.stack.pop():
          ContextVar._cache[k].value = Context.stack[-1].get(
              k, ContextVar._cache[k].value
          )
  
imports: from __future__ import annotations
  import os, functools, platform, time, re, contextlib, operator, hashlib, pickle, sqlite3, cProfile, pstats, tempfile, pathlib, string, ctypes
  from urllib import request
  from tqdm import tqdm
  from typing import Dict, Tuple, Union, List, ClassVar, Optional, Iterable, Any, TypeVar, TYPE_CHECKING, Callable, Sequence
label_desc: Use image node_id 3 for calling the Context obj's underlying member method code with example usage: obj.__exit__() without return types