import time


def delay(us):
    end_time = time.perf_counter_ns() + us * 1000
    while time.perf_counter_ns() < end_time:
        print("", end="")


if __name__ == '__main__':
    import threading

    def test():
        time.sleep(1)
        print("hello")

    def test_2():
        delay(1000 * 1000 * 10)

    threading.Thread(target=test).start()
    threading.Thread(target=test_2).start()