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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def status_bar(python_input):
 """ Create the `Layout` for the status bar. """

    TB = 'class:status-toolbar'

    @if_mousedown
    def toggle_paste_mode(mouse_event):
        python_input.paste_mode = not python_input.paste_mode

    @if_mousedown
    def enter_history(mouse_event):
        python_input.enter_history()

    def get_text_fragments():
        python_buffer = python_input.default_buffer

        result = []
        append = result.append

        append((TB, ' '))
        result.extend(get_inputmode_fragments(python_input))
        append((TB, ' '))

        # Position in history.
        append((TB, '%i/%i ' % (python_buffer.working_index + 1,
                                len(python_buffer._working_lines))))

        # Shortcuts.
        app = get_app()
        if not python_input.vi_mode and app.current_buffer == python_input.search_buffer:
            append((TB, '[Ctrl-G] Cancel search [Enter] Go to this position.'))
        elif bool(app.current_buffer.selection_state) and not python_input.vi_mode:
            # Emacs cut/copy keys.
            append((TB, '[Ctrl-W] Cut [Meta-W] Copy [Ctrl-Y] Paste [Ctrl-G] Cancel'))
        else:
            result.extend([
                (TB + ' class:key', '[F3]', enter_history),
                (TB, ' History ', enter_history),
                (TB + ' class:key', '[F6]', toggle_paste_mode),
                (TB, ' ', toggle_paste_mode),
            ])

            if python_input.paste_mode:
                append((TB + ' class:paste-mode-on', 'Paste mode (on)', toggle_paste_mode))
            else:
                append((TB, 'Paste mode', toggle_paste_mode))

        return result

    return ConditionalContainer(
            content=Window(content=FormattedTextControl(get_text_fragments), style=TB),
            filter=~is_done & renderer_height_is_known &
                 Condition(lambda: python_input.show_status_bar and
                                      not python_input.show_exit_confirmation))