import multiprocessing as mp
import os

mp.set_start_method("forkserver", force=True)


def child(remaining):
    print(f"PID: {os.getpid()}, PPID: {os.getppid()}")
    remaining -= 1
    if remaining > 0:
        proc = mp.Process(target=child, args=(remaining,))
        proc.start()
        proc.join()


def main():
    proc = mp.Process(target=child, args=(5,))
    proc.start()
    proc.join()


if __name__ == '__main__':
    main()