Duplicate output when using nested widgets.Output

[DonJayamanne]

Run a notebook with the following cells

import ipywidgets as widgets
from IPython.display import display

out = widgets.Output()
out

@out.capture()
def function_with_captured_output():
    print('First output widget')

function_with_captured_output()

out2 = widgets.Output()
caption = widgets.Label(value='Label Widget')
textbox = widgets.Text()
widgets.link((caption, 'value'), (textbox, 'value'))

@out.capture()
def function_with_captured_output():
    display(out2)
    display(caption)
    display(textbox)

function_with_captured_output()

@out2.capture()
def function_with_captured_output2():
    print('Second output widget')

function_with_captured_output2()

When running the last cell, the output Second output widget should ideally be displayed only inside an output widget nested withinm the first. That works, however, we also display a completely second output item, and thats incorrect. Basically the output Second output widget is duplicated.

This is due to the special case handling of output widgets in Jupyter lab.

[ybagdasa]

I have a similar/same problem:

from IPython.display import display,clear_output
from ipywidgets import interact
import matplotlib.pyplot as plt
import ipywidgets as widgets

out = widgets.Output()
def overlay_fits():
    def show_fit(i):
        with out:
            clear_output()
            display(f'this is happening twice: fit{i}')

    n = 10
    interactive_image = interact(show_fit,i=(0,n-1));

ii = overlay_fits()
out

Extension	Author (truncated)	Version
jupyter-keymap	ms-	1.1.2
remote-containers	ms-	0.315.1
remote-ssh	ms-	0.106.5
remote-ssh-edit	ms-	0.86.0
remote-wsl	ms-	0.81.8
vscode-remote-extensionpack	ms-	0.24.0
remote-explorer	ms-	0.4.1
remote-server	ms-	1.4.3
python	ms-	2023.18.0
vscode-pylance	ms-	2023.10.20
jupyter	ms-	2023.9.1102792234
jupyter-keymap	ms-	1.1.2
jupyter-renderers	ms-	1.0.17
vscode-jupyter-cell-tags	ms-	0.1.8
vscode-jupyter-slideshow	ms-	0.1.5

Selected Jupyter core packages... IPython : 8.14.0 ipykernel : 6.25.0 ipywidgets : 8.1.0 jupyter_client : 8.3.0 jupyter_core : 5.3.1 jupyter_server : 2.7.0 jupyterlab : 4.0.5 nbclient : 0.8.0 nbconvert : 7.7.3 nbformat : 5.9.2 notebook : 7.0.2 qtconsole : not installed traitlets : 5.9.0

[vttrifonov]

same here

[vttrifonov]

In my case the issue was resolved by restart of VSCode... Something was registered twice

[alexjnelson]

In my case the issue was resolved by restart of VSCode... Something was registered twice

This was the case for me as well. Thanks for pointing it out