import multiprocessing
 
from multiprocessing import Process
import os
 
def info(title):
    print(title)
    print('module name:', __name__)
    if hasattr(os, 'getppid'):  # only available on Unix
        print('parent process:', os.getppid())
    print('process id:', os.getpid())
 
def f(name):
    info('function f')
    print('hello', name)
 
if __name__ == '__main__':
    info('main line')
    p = Process(target=f, args=('bob',))
    p.start()
    p.join()
    print(multiprocessing.active_children())
    print(multiprocessing.cpu_count())

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