/usr/lib/python3/dist-packages/pyvisa/compat/check_output.py is in python3-pyvisa 1.8-2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 | # -*- coding: utf-8 -*-
"""
pyvisa.compat.check_output
~~~~~~~~~~~~~~~~~~~~~~~~~~
Taken from the Python 2.7 source code.
:copyright: 2013, PSF
:license: PSF License
"""
from __future__ import division, unicode_literals, print_function, absolute_import
import subprocess
def check_output(*popenargs, **kwargs):
r"""Run command with arguments and return its output as a byte string.
Backported from Python 2.7 as it's implemented as pure python on stdlib.
>>> check_output(['/usr/bin/python', '--version'])
Python 2.6.2
"""
process = subprocess.Popen(stdout=subprocess.PIPE, *popenargs, **kwargs)
output, unused_err = process.communicate()
retcode = process.poll()
if retcode:
cmd = kwargs.get("args")
if cmd is None:
cmd = popenargs[0]
error = subprocess.CalledProcessError(retcode, cmd)
error.output = output
raise error
return output
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