Live output status from subprocess command Python

Question

I'm writing a script to get netstat status using subprocess.check_output.

cmd = 'netstat -nlpt'

result = subprocess.check_output(cmd, shell=True, timeout=1800)
print(result.decode('utf-8'))

The above is running perfectly. Is there any way to get the live-streaming output. I have heard poll() function does this job. In live output from subprocess command they are using popen but i'm using check_output please some one help me on this issue. Thank you!

Actually no, they are using Popen and here i'm using check_output — Darshan Mahalinge Gowda, Jun 29 '20 at 14:28
*Why* do you use ``check_output`` when you want life output instead? — MisterMiyagi, Jun 29 '20 at 14:35
Please do not edit your question in a way that changes its topic. This has invalidated previous answers. — MisterMiyagi, Jun 30 '20 at 09:57

Red · Accepted Answer · 2020-06-29T14:34:13.527

0

From this answer:

The difference between check_output and Popen is that, while popen is a non-blocking function (meaning you can continue the execution of the program without waiting the call to finish), check_output is blocking.

Meaning if you are using subprocess.check_output(), you cannot have a live output.

Try switching to Popen().

edited Jun 29 '20 at 14:34

answered Jun 29 '20 at 14:28

Red

26,798
7
36
58

Live output status from subprocess command Python

1 Answers1