使用multiprocessing包，demo

#!/usr/bin/python3
import os
import time
import multiprocessing


def drink():
    print("drink pid, ppid", os.getpid(), os.getppid())
    for i in range(3):
        print("drink...")
        time.sleep(1)


def eat():
    print("eat process pid, ppid", os.getpid(), os.getppid())
    for i in range(3):
        print("eat...")
        time.sleep(1)


if __name__ == '__main__':
    drink_process = multiprocessing.Process(target=drink)
    eat_process = multiprocessing.Process(target=eat)
    print("cpu core num: ", os.cpu_count())

    print("main pid ", os.getpid())

    drink_process.start()
    eat_process.start()