[Python] python - subprocess cannot use stdout with CREATE_NEW_CONSOLE

test.bat

@echo off
for /L %%i in (40, -1, 10) do (
echo working %%i test1
ping localhost -n 2 > nul
)
echo Done!


main.py

import subprocess

startupinfo = subprocess.STARTUPINFO()
startupinfo.dwFlags |= subprocess.STARTF_USESHOWWINDOW
startupinfo.wShowWindow = 5
process1 = subprocess.Popen('test.bat', stdout=subprocess.PIPE, text=True, creationflags=subprocess.CREATE_NEW_CONSOLE)

while process1.poll() is None:
test1 = process1.stdout.readline()
print(test1.rstrip(), flush=True)


What is the point of creationflags=subprocess.CREATE_NEW_CONSOLE ... if the console window has nothing inside it ... because the output is being redirected with stdout=subprocess.PIPE?

Is there a way subprocess.popen opens the actual bat file (with output visible in the console window) ... and forks off the stdout=subprocess.PIPE into a variable ... at the same time? (without saving stdout=subprocess.PIPE into a text file)

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