Suppress print to console with os.popen? - Python

Question

When using the popen to unix commands, i get certain outputs to the console.

I understand that subprocess.popen has features that supresses the output. Suppress output from subprocess.Popen

Does os.popen have the same supression feature?

please note that I've pipes in my unix command and i can't get subprocess.Popen to work. My command looks like this

$ echo "es ist also grotesk , wenn herr jospin die europäische richtlinie und die britische datumsgestützte ausfuhrregelung gröblichst mißachtet und durch seine eigenen bedingungen zu ersetzen trachtet ." | treetagger/cmd/tree-tagger-german-utf8

duplicate: http://stackoverflow.com/questions/7082623/suppress-output-from-subprocess-popen — Serdalis, Mar 20 '13 at 03:48
Whee, TreeTagger! How I don't miss remote-controlling you via the commandline. — Torsten Marek, Mar 20 '13 at 05:36
it's much better than messing around with the wrapper classes. Much cleaner to code. — alvas, Mar 20 '13 at 05:38

Torsten Marek · Accepted Answer · 2013-03-20T06:53:50.593

2

Do not use pipes, do not use os.popen:

import subprocess

text = "es ist also ..."
tt = subprocess.Popen('treetagger/cmd/tree-tagger-german-utf8', 
                      stdout=subprocess.PIPE, 
                      stderr=subprocess.PIPE,
                      stdin=subprocess.PIPE)
tagged, stderr = tt.communicate(txt)

Back in the day when I was the processing pipeline developer for the Text+Berg corpus, I wrote a wrapper class for the TreeTagger, circumventing the wrapper scripts (which are of dubious quality anyway). Unfortunately, the code is proprietary.

edited Mar 20 '13 at 06:53

answered Mar 20 '13 at 05:55

Torsten Marek

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my wrapper did very crazily simple things to get the lemmas =) http://pastebin.com/2Qnz4yFc – alvas Mar 20 '13 at 06:30
Contact me (see my profile) and I can get you in touch with the people that own this code, they might give it to you. – Torsten Marek Mar 20 '13 at 06:53
Why shouldn't I use "pipes" and `os.popen`? What's the difference between `os.popen` and `subprocess.Popen`? – maciejwww Feb 10 '23 at 14:18

score 1 · Answer 2 · answered Mar 20 '13 at 03:48

1

Just use subprocess.check_output instead. It will capture the output in a string for you, and will also do error checking automatically (throwing an error if the command fails).

answered Mar 20 '13 at 03:48

John Zwinck

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it's sort of weird, i want the outputs in strings but not the error output. how can i do that? – alvas Mar 20 '13 at 04:20
See my answer. You can have the result in string. – pynovice Mar 20 '13 at 04:21
1

I think `check_output` does put the command's stdout in the result string but leaves the command's stderr hooked up to the calling script's stderr. Is that not what you want? – John Zwinck Mar 20 '13 at 04:23
i think it's not working due to the pipes, my command looks like this `echo "es ist also grotesk , wenn herr jospin die europäische richtlinie und die britische datumsgestützte ausfuhrregelung gröblichst mißachtet und durch seine eigenen bedingungen zu ersetzen trachtet ." | treetagger/cmd/tree-tagger-german-utf8` – alvas Mar 20 '13 at 04:37

score 0 · Answer 3 · answered Mar 20 '13 at 03:48

0

Do like this:

result = subprocess.Popen(['command'], 
           stderr=subprocess.PIPE, stdout=subprocess.PIPE).communicate()[0]

More information can be found in the documentation.

answered Mar 20 '13 at 03:48

pynovice

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Suppress print to console with os.popen? - Python

3 Answers3