Function pytest_configure

src/_pytest/threadexception.py:132–137

(config: Config)

def pytest_configure(config: Config) -> None:
    prev_hook = threading.excepthook
    deque: collections.deque[ThreadExceptionMeta | BaseException] = collections.deque()
    config.stash[thread_exceptions] = deque
    config.add_cleanup(functools.partial(cleanup, config=config, prev_hook=prev_hook))
    threading.excepthook = functools.partial(thread_exception_hook, append=deque.append)


@pytest.hookimpl(trylast=True)