Create new console for the same process

Question

I am trying to understand how to create a new console to print stuff, that is, have more than one stdout available. After reading some questions, I only managed to do this:

from subprocess import Popen, CREATE_NEW_CONSOLE
handle = Popen("cmd", stdin=PIPE, creationflags=CREATE_NEW_CONSOLE)
i.write(b'hello')

But the message doesnt show up on the new console.

What are my options?

Where do you want the output to go? Do you want it interleaved with your program's output, or sent to a file, or somewhere else? Is that "somewhere else" a thing with a .write() method? It's not clear to me what you're expecting to see. — Kevin
– Kevin, Commented Nov 5, 2014 at 15:47
@Kevin I want to print to print some stuff on one console and other stuff on another console. — Rui Botelho
– Rui Botelho, Commented Nov 5, 2014 at 15:54

Rui Botelho · Accepted Answer · 2014-11-05 16:07:27Z

1

Altough I didnt find how to directly create new sdtouts from new consoles, I managed to get the same effect using inter-process communication pipes.

new_console.py

from multiprocessing.connection import Client
import sys

address = '\\\\.\pipe\\new_console'
conn = Client(address)
while True:
    print(conn.recv())

console_factory.py

from multiprocessing.connection import Listener
from subprocess import Popen, CREATE_NEW_CONSOLE

address = '\\\\.\pipe\\new_console'
listener = Listener(address)

def new_console():
    Popen("python new_console.py", creationflags=CREATE_NEW_CONSOLE)
    return listener.accept()

c1 = new_console()
c1.send("console 1 ready")
c2 = new_console()
c2.send("console 2 ready")

Further improvements include sending input from new consoles to the main process, using select in the loop.

answered Nov 5, 2014 at 16:07

Rui Botelho

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