def decode_cmd_out(self, completed_cmd):
        """
        return a standard message
        """
        try:
            stdout = completed_cmd.stdout.encode('utf-8').decode()
        except AttributeError:
            try:
                stdout = str(bytes(completed_cmd.stdout), 'big5').strip()
            except AttributeError:
                stdout = str(bytes(completed_cmd.stdout).decode('utf-8')).strip()
        try:
            stderr = completed_cmd.stderr.encode('utf-8').decode()
        except AttributeError:
            try:
                stderr = str(bytes(completed_cmd.stderr), 'big5').strip()
            except AttributeError:
                stderr = str(bytes(completed_cmd.stderr).decode('utf-8')).strip()
        return ParsedCompletedCommand(
            completed_cmd.returncode,
            completed_cmd.args,
            stdout,
            stderr
        )
return a standard message