Python multiprocessing question.

from multiprocessing import Process

def GO():
    print('Hi\n')

if __name__=='__main__':
    pr1 = Process(target=GO)
    pr2 = Process(target=GO)
    pr1.start()
    pr2.start()
    pr1.join()
    pr2.join()

I made it while looking at the multiprocessing example. Hi is not output at all. What's wrong?

Multi-threads work well, but only multiprocessing works like this.

I think it's a problem with my computer environment because it runs well with a code executor Is there a separate environment where multiprocessing is not possible?