Error when using os.fork()

[Zacker]

I’m a beginner of Python & Phyonista. I met an erro when running os.fork(), but don’t know why...
Is there anyone who knows the resason?

Thanks in advance.

[JonB]

iOS prohibits apps from working new process. You cannot use multiprocessing or subprocesses either

[Zacker]

Ok...I see...
Thank you so much!