Unable to unpair ipynb in jupyter notebook

[hugokerstens]

When working in a md file from jupyter notebook I am unable to unpair the ipynb notebook. I tried to unpair ipynb in two ways:

• Uncheck File > Jupytext > Pair notebook with ipynb document
• File > Jupytext > Unpair current notebook.

In both cases, jupyter.jupytext.formats: md,ipynb is unchanged in the metadata, and the ipynb output is saved.

This issue is not present when using jupyterlab, where the two ways I described above to disable pairing work as intended.

Versions used:

jupyter                       1.0.0
jupyter_client                8.6.0
jupyter-console               6.6.3
jupyter_core                  5.5.0
jupyter-events                0.9.0
jupyter-lsp                   2.2.0
jupyter_server                2.10.1
jupyter_server_terminals      0.4.4
jupyterlab                    4.0.8
jupyterlab-pygments           0.2.2
jupyterlab_server             2.25.1
jupyterlab-widgets            3.0.9
jupytext                      1.16.0

[mwouts]

Oh that's unexpected. Thanks for reporting this.
Indeed I can confirm the issue on Binder.
Do you have the same issue if you call these commands from the command palette too?

[mahendrapaipuri]

I can reproduce the bug too. It is wierd that it occurs only on notebook. I am in a conference all this week. I will look into it next week unless someone wants to have a look at it before. I did not notice any obvious errors in browser console while executing these commands.

We should add UI tests for notebook as well like we do for Lab. Ref #1192

[mwouts]

No worries @mahendrapaipuri, the fix for this can wait - you should make the most of your conference! If I had to make a guess I would say that there have not been many extensions for Jupyter Notebook 7 yet, so using extensions there might be a less well tested area?

[mahendrapaipuri]

Well, JupyterLab extensions should work out-of-the-box with Notebook 7 (except for JupyterLab's launcher part). That was the design objective of Notebook 7 .So, all the extensions of JupyterLab 3 that have been upgraded to JupyterLab 4 should work with Notebook 7 (as long as we use JupyterLab's Launcher as optional dependency in the extension).

I will check next week, but it could be that notebook tracker behaving differently in JupyterLab and Notebook.

[mahendrapaipuri]

@hugokerstens @mwouts Could you please provide me detailed steps on how to reproduce the behavior on Lab and Notebook? Cheers!!

[mwouts]

Hey @mahendrapaipuri , here are the detailed steps to reproduce:

1. Go to (or launch jupyter notebook)
2. Click on File/New Text Notebook/New MyST Markdown Notebook
3. Click on File/Jupytext/Pair notebook with ipynb document
4. Click again on File/Jupytext/Pair notebook with ipynb document.

Clicking a second time does not deselect the menu entry, and the notebook metadata continues to be

jupytext:
  formats: md:myst,ipynb

[mahendrapaipuri]

Cheers @mwouts for the instructions. I have the same behaviour with JupyterLab too. What I mean is I cannot unpair markdown notebook in the JupyterLab interface either. In the original comment @hugokerstens mentioned that the unpairing works on JupyterLab.

@mwouts Could you please test it on JupyterLab and confirm that unpairing does not work on JupyterLab too? Cheers!!