Python multiprocessing: How can I RELIABLY redirect stdout from a child process?

Question

NB. I have seen Log output of multiprocessing.Process - unfortunately, it doesn\'t answer this question.

I am creating a child process (on windows) via multiprocessi

Answer 1

Here is the simple and straightforward way for capturing stdout for multiprocessing.Process:

import app
import io
import sys
from multiprocessing import Process


def run_app(some_param):
    sys.stdout = io.TextIOWrapper(open(sys.stdout.fileno(), 'wb', 0), write_through=True)
    app.run()

app_process = Process(target=run_app, args=('some_param',))
app_process.start()
# Use app_process.termninate() for python <= 3.7.
app_process.kill()