【Python】开启子进程并获取PID

方式一
# import time
# from multiprocessing import Process
#
#
# def task(name):
#     print('%s is running ' % name)
#     time.sleep(3)
#     print('%s is done' % name)
#
#
# if __name__ == '__main__':
#     p = Process(target=task, kwargs={'name': '子进程1'})   # 调用task 传入参数name
#     p.start()    # 仅仅给操作系统发送信号
#
#     print('主')

方式二
import time,os
from multiprocessing import Process


class MyProcess(Process):
    def __init__(self, name):
        super(MyProcess, self).__init__()
        self.name = name

    def run(self):  # 固定名字run, 会被start调用
        print('child <%s> is running, parent is <%s>' % (os.getpid(), os.getppid()))
        time.sleep(3)
        print('child <%s> is done, parent is <%s>' % (os.getpid(), os.getppid()))


if __name__ == '__main__':
    p = MyProcess('子进程')
    p.start()
    print('主进程<%s>, pycharm<%s>' % (os.getpid(), os.getppid()))