STINNER Victor <vstin...@python.org> added the comment:
I updated my PR 23790 to add many usage of the new parameter, to see which kind of code would benefit of it. -- Use case: Get the output of a command, don't fail if the command doesn't exist. Example: get "gcc --version" output. It's common to redirect stderr to /dev/null. The advantage of having a parameter is the ability to continue using regular subprocess methods without having to bother with the "command not found" case: proc.communicate() proc.stdout.read() if proc.returncode: ... ... -- Tools/scripts/patchcheck.py calls subprocess.check_output() and uses "except subprocess.CalledProcessError:" to ignore any command error. But it doesn't catch "OSError" if the command doesn't exist (ex: "git" in this case). *Maybe* exec_raise=False should even be the default behavior for functions like check_output()? But changing the default behavior is always a challenge for the backward compatibility :-( ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue42648> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
