python catch subprocess error

Charles-Alexandre Roy answered on October 23, 2020 Popularity 7/10 Helpfulness 9/10

answer python catch subprocess error

related python subprocess exception handling

python catch subprocess error

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# Basic syntax:
import subprocess
subprocess.run(["your", "command"], capture_output=True, text=True).stderr
# Where:
#	- capture_output=True causes the argument, returncode, stdout, and stderr
#		to be captured and returned in an object like:
#		CompletedProcess(args=['ls'], returncode=0, stdout='sample_data\n', stderr='')
#	- text=True causes the stdout and stderr to be a regular (non-binary) string
#	- .stderr allows you to access just the captured stderr from the process

# Example usage:
# I often set things up something like this:
subprocess_output = subprocess.run(["ls", "-l"], capture_output=True, text=True)
if subprocess_output.returncode == 0:
	print("subprocess finished without error")
else:
	print("The following error occurred:\n {}".format(subprocess_output.stderr))

Popularity 7/10 Helpfulness 9/10 Language python

Source: docs.python.org

Tags: exception-handling python subprocess

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Contributed on Dec 29 2022

Charles-Alexandre Roy

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try:
    subprocess.check_output(...)
except subprocess.CalledProcessError as e:
    print(e.output)

Popularity 9/10 Helpfulness 5/10 Language python

Source: stackoverflow.com

Tags: exception-handling exception-handlin

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Contributed on Oct 23 2020

Clumsy Cassowary

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python catch subprocess error

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