为什么下面的程序实现不了多进程的目的？无法在主程序中调用download_task函数？小白求教~

Question

from multiprocessing import Process
from os import getpid
from random import randint
from time import time, sleep

def download_task(filename):
print('启动下载进程，进程号[%d].' % getpid())
print('开始下载%s...' % filename)
time_to_download = randint(5, 10)
sleep(time_to_download)
print('%s下载完成! 耗费了%d秒' % (filename, time_to_download))

def main():
start = time()
p1 = Process(target=download_task, args=('Python从入门到住院.pdf', ))
p1.start()
p2 = Process(target=download_task, args=('Peking Hot.avi', ))
p2.start()
p1.join()
p2.join()
end = time()
print('总共耗费了%.2f秒.' % (end - start))

if name == '__main__':
main()

Answer 1

https://blog.csdn.net/kongsuhongbaby/article/details/85244863