Wait for a button widget to be clicked

[lodm94]

HI all,
i am struggling with the following problem. I can't find a solution reading the documentation so i am asking here.
Let's assume i want to deploy a feedback stage for a certain application.
Let's assume i have a text-box for output and two button for input like the following:

import ipywidgets as ipw
from ipywidgets import Layout
txt_out=ipw.Textarea(
        value='are you interested in leaving a feedback?',
        disabled=True,
        layout=Layout(border='solid 1px', width = '650px', height = '150px', )
    )

yes=ipw.Button(
        description='',
        disabled=False,
        button_style='info', # 'success', 'info', 'warning', 'danger' or ''
        tooltip='Yes',
        icon='thumbs-up',
        layout=Layout(height='50px')
    )

no=ipw.Button(
        description='',
        disabled=False,
        button_style='info', # 'success', 'info', 'warning', 'danger' or ''
        tooltip='No',
        icon='thumbs-down',
        layout=Layout(height='50px'))

box1=ipw.HBox([yes,no])
box2=ipw.VBox([txt_out,box1])
display(box2)

Wich results like:

How can i wait for the user press a button inside a function? I would use thread, but exactly wich function should i thread? I cant thread directly the on_click button function, am i right?

The goal is change txt_out.value according to user choice (multiple times, indeed).
Appreciate your help

Thanks

[msat59]

Have you solved it?
It's my question too.