def non_stateless():
    non_stateless

if __name__ == '__main__':
    import threading
    from concurrent import interpreters
    interps = [interpreters.create() for i in range(10)]
    threads = [
        threading.Thread(target=interp.call, args=(non_stateless,))
        for interp in interps
    ]
    for thread in threads:
        thread.start()
    for thread in threads:
        thread.join()