Scrollable VBox with buttons ipythonwidgets

I am trying to create a scrollable VBox filled with a list of Buttons. However I've tried to no avail.

import ipywidgets as ipw

import ipywidgets as widgets
from IPython.display import display


vbox = widgets.VBox(layout=widgets.Layout(height='100px', overflow_y='scroll'))


num_buttons = 20
button_list = [widgets.Button(description=f'Button {i+1}') for i in range(num_buttons)]

for button in button_list:
    vbox.children += (button,)


display(vbox)

result of code

I set the overflow_y='scroll' and also used the 'auto' command instead of making the VBox scrollable its simply "squishes" my buttons

Solution

It seems it automatically resizes all widgets to fit them inside VBox
and Button needs min_height to keep some size.

(It doesn't work for height)

widgets.Button(
    description=f'Button {i+1}', 
    layout=widgets.Layout(min_height='30px')
)

Full working code:

import ipywidgets as widgets
from IPython.display import display

vbox = widgets.VBox(layout=widgets.Layout(height='100px', overflow_y='scroll'))

num_buttons = 20

button_list = [
    widgets.Button(description=f'Button {i+1}', layout=widgets.Layout(min_height='30px'))
    for i in range(num_buttons)
]

vbox.children += tuple(button_list)

display(vbox)

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