[PD] Re: running python script with [command] outputs info only when script exits

It seems that Python's "print" buffers its output per default. The issue you experience seems not specific to [command], but happens also when you pipe the output to some other command, like in:

./counter.py | grep 2

You will see the '2' only appear when the whole script has finished running.

You can tell print to immediately flush the current buffer:

 print(i, flush=True)

cheers, Roman

On Tue, 2024-12-10 at 12:02 +0200, Alexandros Drymonitis wrote:

Is it possible to run a Python script with [command] that runs a while True loop and have it print data to the middle outlet of [command] continuously? I can't see how to make this work. As a test, I wrote the script below and tested it:

from time import sleep

for i in range(10):
     print(i)
     sleep(1)

[command] will output 10 numbers together when the script exits. Is it possible to get the incrementing variable i printed every second?

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