def success(exitcode, message):
if exitcode is not <NUM_LIT:0>:<EOL><INDENT>raise ChildProcessError("<STR_LIT>" % message)<EOL><DEDENT>
Raise an IO Error if the return code from a subprocess is non-zero

:param exitcode: The return code from a subprocess run
:param message: A custom message if the process failed
:raises: ChildProcessError