run terminal command but don't show output via python

Question

I tried this

a = subprocess.run(['apt download timeshhhh'],stdout = subprocess.PIPE, shell = True)

but this shows:

WARNING: apt does not have a stable CLI interface. Use with caution in scripts.

E: Unable to locate package timeshhhh

I want only:

E: Unable to locate package timeshhhh

what to do?

The title of your question doesn't match the text. "don't show output via python" is not the same as only wanting to see the last line. — tink
– tink, Commented Jan 10, 2019 at 21:43

Barmar · Accepted Answer · 2019-01-10 21:15:34Z

2

That's the stderr output, which you didn't redirect. You can redirect it to DEVNULL if you don't want to see it.

a = subprocess.run(['apt download timeshhhh'],stdout = subprocess.PIPE, stderr = subprocess.DEVNULL, shell = True)

answered Jan 10, 2019 at 21:15

Barmar

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2 Comments

Not 100% that a WARNING output would be on stderr.

If it's not coming from the pipe, it presumably is.