fromconcurrent.futuresimportThreadPoolExecutorimportshelveCACHE=shelve.open('test')defcheck_set_cache(value):if'value'inCACHE:print(CACHE['value'])CACHE['value']=valuereturnCACHE['value']jobs=list(range(1,100))executor=ThreadPoolExecutor(max_workers=5)entries=list(executor.map(check_set_cache,jobs))print(entries)

Traceback (most recent call last):  File "/usr/lib64/python3.13/dbm/sqlite3.py", line 79, in _execute    return closing(self._cx.execute(*args, **kwargs))                   ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^sqlite3.ProgrammingError: SQLite objects created in a thread can only be used in that same thread. The object was created in thread id 140036133836608 and this is thread id 140035884230336.During handling of the above exception, another exception occurred:Traceback (most recent call last):  File "/home/megh/pybug/reproduce.py", line 14, in <module>    entries = list(executor.map(check_set_cache, jobs))  File "/usr/lib64/python3.13/concurrent/futures/_base.py", line 619, in result_iterator    yield _result_or_cancel(fs.pop())          ~~~~~~~~~~~~~~~~~^^^^^^^^^^  File "/usr/lib64/python3.13/concurrent/futures/_base.py", line 317, in _result_or_cancel    return fut.result(timeout)           ~~~~~~~~~~^^^^^^^^^  File "/usr/lib64/python3.13/concurrent/futures/_base.py", line 449, in result    return self.__get_result()           ~~~~~~~~~~~~~~~~~^^  File "/usr/lib64/python3.13/concurrent/futures/_base.py", line 401, in __get_result    raise self._exception  File "/usr/lib64/python3.13/concurrent/futures/thread.py", line 59, in run    result = self.fn(*self.args, **self.kwargs)  File "/home/megh/pybug/reproduce.py", line 7, in check_set_cache    if 'value' in CACHE:       ^^^^^^^^^^^^^^^^  File "/usr/lib64/python3.13/shelve.py", line 102, in __contains__    return key.encode(self.keyencoding) in self.dict           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  File "<frozen _collections_abc>", line 817, in __contains__  File "/usr/lib64/python3.13/dbm/sqlite3.py", line 89, in __getitem__    with self._execute(LOOKUP_KEY, (key,)) as cu:         ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^  File "/usr/lib64/python3.13/dbm/sqlite3.py", line 81, in _execute    raise error(str(exc))dbm.sqlite3.error: SQLite objects created in a thread can only be used in that same thread. The object was created in thread id 140036133836608 and this is thread id 140035884230336.