继承Process类,计算累加和以及阶乘

#定义一个类 继承Process类
from multiprocessing import Process
import os
class Download(Process):
    def __init__(self,num):
        Process.__init__(self)
        self.num = num
        # print(type(self.num))<class 'str'>
    def run(self):
        print('子进程(%s)开始执行,父进程为(%s)'%(os.getpid(),os.getppid()))
        #计算阶乘
        def func(n):

            if n == 1:
                return 1
            return n*func(n-1)
        t = func(int(self.num))
        print(t)
        #计算累加和
        def fun(n):
            if n == 1:
                return 1
            return n + fun(n-1)
        ob = fun(int(self.num))
        print(ob)

if __name__ == "__main__":

    print("当前程序主进程id: (%s)"%os.getpid())
    num = input('Enter number:')
    p = Download(num)
    #这里调用了run
    p.start()