multiple calls to IPython.display() renders CodeInput in wrong cell

[jpradov]

Hello everyone,

When we display(codeinput) multiple times, the content of the WidgetCodeInput is rendered only on the output of the first display() call, and the following calls yield blank boxes.

The expected behaviour would be to have two separate renderings of the same Widget connected to the same backend View, according to the ipywidgets doc. This happens without problem for standard ipywidget Widgets.

My impression after reading this bit about WidgetModels is that the Typescript back-end object has trouble identifying which one of the WidgetView is trying to render the WidgetModel.

I am using Safari/Firefox and
widget_code_input : 3.5.5
IPython : 8.3.0
ipykernel : 6.9.1
ipywidgets : 8.0.3
jupyter_client : 7.2.2
jupyter_core : 4.11.1
jupyter_server : 1.18.1
jupyterlab : 3.4.8
nbclient : 0.5.13
nbconvert : 6.4.4
nbformat : 5.3.0
notebook : 6.4.11
qtconsole : 5.3.1
traitlets : 5.3.0
ipywidgets : 8.0.3

Code to reproduce :

#first cell

from widget_code_input import WidgetCodeInput

codeinput = WidgetCodeInput(
        function_name="foo", 
        function_parameters="",
        docstring=""" """,
        function_body="""

return True
"""
        )

display(codeinput)
# second cell 
display(codeinput)

Thank you very much for the help,

João

[dou-du]

Thanks for reporting this! This is a interesting issue. Actually, I know why this happen. But it is diffult to solve. I need to think about it and come back to you soon.