Python 多处理在 Visual Studio 中不起作用

Question

I want to make something with the multiprocessing library. But when I run the following code in Visual Studio on my Windows PC, it won't stop the programming and it doesn't print anything.

import multiprocessing
import os

def test():
    print('Hello')

if __name__ == '__main__':
    p = multiprocessing.Process(target=test)
    p.start()
    p.join()

The code works if I don't have a loop at the first process

Answer 1

Agreed, it does not work with any example in VS 2019. This used to work 6 months ago. I recommend just starting things with a batch script.

Answer 2

If you run the your program without debugging (Ctrl + F5 or right click your program and "start without debugging"), the multiprocessing functions just fine. I was having the same issue in VS 2019. My guess is multi-processing debugging isn't supported in VS (it isn't in VS code from this issue in 2017 https://github.com/Microsoft/vscode-python/issues/314 ).