ipywidgets - 有没有办法动态或在事件中刷新 Accordion 标题？

Question

有没有办法强制 Accordion 小部件视图在笔记本上显示后刷新/更改标题？

import ipywidgets as widgets
accordion = widgets.Accordion()
numbers = widgets.Dropdown(options=['1', '2'], value='1')
accordion.children = [numbers]

accordion.set_title(0, 'current value: ' + numbers.value)
def set_title(change):
    display(accordion.get_title(0)) # DEBUG: this shows prover value, however the view doesn't refresh the title 
    accordion.set_title(0, 'current value: ' + change.new)

numbers.observe(set_title, names='value')

display(accordion)

# after displaying, this also doesn't work
accordion.set_title(0, 'current value: whatever')