Python - Running shell command and capturing the output in realtime

Question

This code Running shell command and printing the output in real time.

process = subprocess.Popen('yt-dlp https://www.youtube.com/watch?v=spvPvXXu36A', shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
while True:
    output = process.stdout.readline().decode()
    if output == '' and process.poll() is not None:
        break
    if output:
        print(output.strip())
rc = process.poll()
if rc == 0:
    print("Command succeeded.")
else:
    print("Command failed.")

Take a look on this: http://stackoverflow.com/questions/89228/calling-an-external-command-in-python?noredirect=1&lq=1 — swatchai, Apr 23 '17 at 06:05

sudo · Accepted Answer · 2017-04-23T06:10:25.330

1

You can use the subprocess module to do all that kind of stuff I've included a small example below

from subprocess import call
call(['youtube-dl', 'https://www.youtube.com/watch?v=PT2_F-1esPk'])

Python docs to subprocess

edited Apr 23 '17 at 06:10

answered Apr 23 '17 at 06:00

sudo

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`ls` is (at least on Unix/Linux) systems also available as a binary, you are not invoking the `ls` from your shell (an certainly not `cmd`) – Anthon Apr 23 '17 at 06:03
@Anthon yes i just gave a simple example of call and nothing was coming to my mind – sudo Apr 23 '17 at 06:09

score 0 · Answer 2 · answered Apr 23 '17 at 06:01

You are calling the exectuable --youtube-dl which probably not exists.

If --youtube-dl is a command you can type in from the cmd prompt, you should try subprocess.check_output(['--youtube-dl', some_url], shell=True) then the cmd.exe (at least on Windows) will get invoked.

Python - Running shell command and capturing the output in realtime

2 Answers2