How to use the bpython.repl.extract_exit_value function in bpython

sw.add(repl_widget)
    container.add(sw)

    sb = repl_widget.interact.statusbar
    container.pack_end(sb, expand=False)

    parent.set_focus(repl_widget)
    parent.show_all()
    parent.connect('delete-event', lambda widget, event: gtk.main_quit())

    try:
        gtk.main()
    except KeyboardInterrupt:
        pass

    return repl.extract_exit_value(repl_widget.exit_value)

config,
            options.interactive,
            locals_,
            banner=banner,
        )
    finally:
        sys.stdin = orig_stdin
        sys.stderr = orig_stderr
        sys.stdout = orig_stdout

    # Fake stdout data so everything's still visible after exiting
    if config.flush_output and not options.quiet:
        sys.stdout.write(output)
    if hasattr(sys.stdout, "flush"):
        sys.stdout.flush()
    return repl.extract_exit_value(exit_value)

# This bypasses main_loop.set_alarm_in because we must *not*
        # hit the draw_screen call (it's unnecessary and slow).
        def run_find_coroutine():
            if find_coroutine():
                main_loop.event_loop.alarm(0, run_find_coroutine)

        run_find_coroutine()

    myrepl.main_loop.screen.run_wrapper(run_with_screen_before_mainloop)

    if config.flush_output and not options.quiet:
        sys.stdout.write(myrepl.getstdout())
    if hasattr(sys.stdout, "flush"):
        sys.stdout.flush()
    return repl.extract_exit_value(myrepl.exit_value)

raise ValueError("don't pass in exec_args without options")
        exit_value = ()
        if options.paste:
            paste = curtsies.events.PasteEvent()
            encoding = inspection.get_encoding_file(exec_args[0])
            with io.open(exec_args[0], encoding=encoding) as f:
                sourcecode = f.read()
            paste.events.extend(sourcecode)
        else:
            try:
                interp = Interp(locals=locals_)
                bpargs.exec_code(interp, exec_args)
            except SystemExit as e:
                exit_value = e.args
            if not options.interactive:
                return extract_exit_value(exit_value)
    else:
        # expected for interactive sessions (vanilla python does it)
        sys.path.insert(0, "")

    if not options.quiet:
        print(bpargs.version_banner())
    if banner is not None:
        print(banner)
    global repl
    repl = FullCurtsiesRepl(config, locals_, welcome_message, interp)
    try:
        with repl.input_generator:
            with repl.window as win:
                with repl:
                    repl.height, repl.width = win.t.height, win.t.width
                    exit_value = repl.mainloop(True, paste)

if not options.quiet:
        print(bpargs.version_banner())
    if banner is not None:
        print(banner)
    global repl
    repl = FullCurtsiesRepl(config, locals_, welcome_message, interp)
    try:
        with repl.input_generator:
            with repl.window as win:
                with repl:
                    repl.height, repl.width = win.t.height, win.t.width
                    exit_value = repl.mainloop(True, paste)
    except (SystemExitFromCodeRunner, SystemExit) as e:
        exit_value = e.args
    return extract_exit_value(exit_value)