from multiprocessing import set_start_method, forkserver
from multiprocessing.context import Process
import os


def child2():
    print(f"in child2: pid={os.getpid()}, ppid={os.getppid()}, forkserver.pid={forkserver._forkserver._forkserver_pid}")


def child1():
    set_start_method("forkserver", force=True)
    p = Process(target=child2)
    p.start()
    p.join()
    print(f"in child1: pid={os.getpid()}, ppid={os.getppid()}, forkserver.pid={forkserver._forkserver._forkserver_pid}")


def run():
    p = Process(target=child1)
    p2 = Process(target=child1)
    p2.start()
    p.start()
    p.join()
    p2.join()
    print(f"in run: pid={os.getpid()}, ppid={os.getppid()}, forkserver.pid={forkserver._forkserver._forkserver_pid}")


if __name__ == "__main__":
    set_start_method("forkserver")
    run()