如何从pytest钩子内部知道是否启用了pytest xdist?

pytest -n

def pytest_sessionfinish(session):
    try:
        pytest_worker_id = session.config.slaveinput['slaveid']
    except AttributeError:
        # TODO disambiguate: are we the xdist master node or the "main" pytest node with xdist deactivated?
        ...

注意:这是为了摆脱这种尝试 conftest.py example

谨致问候