Appending another widget to an accordion container?

Widgets
1

I am new to Jupyter notebooks (obviously). I have been reading docs and burning a lot of time, I just can’t seem to find an ipywidgets example or documentation of how to add to an accordion container.

A couple of docs I have found, a video from 2014, and a website:
https://panel.holoviz.org/reference/layouts/Accordion.html

Firstly, I gather there are three common widget libraries? They ipywidgets, an IPython specific library, and the brokeh library, that are all different? Is this a historical evolution and ipywidgets is now the way to go? Perhaps ipywidgets and the brokey widgets are two separate routes? Does the brokey library use a separate server than the jupyter server?

Given that I start with this:

import ipywidgets as widgets
accordion = widgets.Accordion(children=[widgets.IntSlider(), widgets.Text()], titles=('Slider', 'Text'))
display(accordion)

The read the docs doc,
https://ipywidgets.readthedocs.io/en/7.x/examples/Widget%20List.html?highlight=accordion
has no example of adding a widget.

An IPython widgets doc, and the brokeh docs show examples of using an append method, but accordion (from the code just above) and accodion.children have no append method.

Any pointers appreciated.

2

children is a immutable tuple: you might be able to extend it with, e.g.

accordion.children = [*accordion.children, IntSlider()]
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3

@bollwyvl Ok, I see, so there is no method on the container for adding another widget, nor does the container have a list that we may append to.

Hence what we must do is to assign to children a completely new list of contained widgets.

… and here you provide an elegant syntax for creating that new list by spreading the old list along with a new element, then assigning that.

Ok, great, works … I thought that I must have been doing it wrong! LOL

4

Oh gosh, now I am having problems with the titles.

The example in the docs:

Screenshot from 2021-11-16 13-09-53
Screenshot from 2021-11-16 13-09-531080×228 20 KB

Did not add titles as advertised, but instead resulted in: <Sorry, new users can only put one embedded media item in a post. --JupyterBot>
Screenshot from 2021-11-16 13-08-07|690x198

Am I missing something, or are titles only available through an index given to set/get methods?

5

Alas, that’s the ipywidgets 8 API, which isn’t quite out… try the stable docs!

2 Likes