Check a command's return code when subprocess raises a CalledProcessError exception
To get both the process output and the returned code:
from subprocess import Popen, PIPEp = Popen(["ls", "non existent"], stdout=PIPE)output = p.communicate()[0]print(p.returncode)subprocess.CalledProcessError is a class. To access returncode use the exception instance:
from subprocess import CalledProcessError, check_outputtry: output = check_output(["ls", "non existent"]) returncode = 0except CalledProcessError as e: output = e.output returncode = e.returncodeprint(returncode)
Most likely my answer is no longer relevant, but I think it may be solved with this code:
import subprocessfailing_command='ls non_existent_dir'try: subprocess.check_output(failing_command, shell=True, stderr=subprocess.STDOUT)except subprocess.CalledProcessError as e: ret = e.returncode if ret in (1, 2): print("the command failed") elif ret in (3, 4, 5): print("the command failed very much")