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bpo-32102 Add "capture_output=True" to subprocess.run (GH-5149)

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Add "capture_output=True" option to subprocess.run, this is equivalent to
setting stdout=PIPE, stderr=PIPE but is much more readable.
This commit is contained in:
Bo Bayles 2018-01-30 00:40:39 -06:00 • committed by Gregory P. Smith
parent 95441809ef
commit ce0f33d045
5 changed files with 54 additions and 9 deletions
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10
Lib/subprocess.py
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@ -409,7 +409,8 @@ class CompletedProcess(object):
self.stderr)
def run(*popenargs, input=None, timeout=None, check=False, **kwargs):
def run(*popenargs,
input=None, capture_output=False, timeout=None, check=False, **kwargs):
"""Run command with arguments and return a CompletedProcess instance.
The returned instance will have attributes args, returncode, stdout and
@ -442,6 +443,13 @@ def run(*popenargs, input=None, timeout=None, check=False, **kwargs):
raise ValueError('stdin and input arguments may not both be used.')
kwargs['stdin'] = PIPE
if capture_output:
if ('stdout' in kwargs) or ('stderr' in kwargs):
raise ValueError('stdout and stderr arguments may not be used '
'with capture_output.')
kwargs['stdout'] = PIPE
kwargs['stderr'] = PIPE
with Popen(*popenargs, **kwargs) as process:
try:
stdout, stderr = process.communicate(input, timeout=timeout)