Ipywidget Accordion default behaviour

Question

Ipywidget accordion is expanded by default when the notebook is executed for the first time. How to make the accordion collapsed by default ?

Thanks in Advance.

Answer 1

Set selected_index = None when creating the Accordion.

from ipywidgets import Accordion, FloatSlider
acc = Accordion(children=[FloatSlider()], selected_index=None)
display(acc)