Refresh prompt from custom key binding

I am trying to oweride ctrl+d with custom command, calling command works but after presing c-d prompt and bottom toolbar are same. (commands.exit() changes prompt and bottom toolbar but) They change only if I pres enter, how can I redraw prompt and bottom toolbar from custom binding?

here is example code

def shell():
    """Repl shell"""
    print("Welcome")
    prompt = PromptSession(
        history=FileHistory(os.path.join(os.path.expanduser("~"), ".history.txt"))
    )
    commands = Commands()
    bindings = KeyBindings()

    @bindings.add("c-d")
    def _(event):
        def print_exit():
            print(commands.exit())

        run_in_terminal(print_exit)

    while True:
        try:
            user_input = prompt.prompt(
                commands.prompt,
                auto_suggest=AutoSuggestFromHistory(),
                enable_history_search=True,
                key_bindings=bindings,
                bottom_toolbar=commands.bottom,
            )
            if not user_input:
                continue
            except (EOFError, KeyboardInterrupt):
                break

[jonathanslenders]

I think the following should do it:

from prompt_toolkit.application import get_app

get_app().invalidate()

[deeuu]

I too would very much appreciate a concrete example of updating the prompt from a custom key binding!