Method error

Lib/argparse.py:2875–2891

error(message: string) Prints a usage message incorporating the message to stderr and exits. If you override this in a subclass, it should not return -- it should either exit or raise an exception.

(self, message)

        _sys.exit(status)

    def error(self, message):
        """error(message: string)

        Prints a usage message incorporating the message to stderr and
        exits.

        If you override this in a subclass, it should not return -- it
        should either exit or raise an exception.
        """
        self.print_usage(_sys.stderr)
        theme = self._get_theme(file=_sys.stderr)
        fmt = _('%(prog)s: error: %(message)s\n')
        fmt = fmt.replace('error: %(message)s',
                        f'{theme.error}error:{theme.reset} {theme.message}%(message)s{theme.reset}')

        args = {'prog': self.prog, 'message': message}
        self.exit(2, fmt % args)

    def _warning(self, message):
        theme = self._get_theme(file=_sys.stderr)