The Jupyter contributor community is proud to announce JupyterLab 4.0, the next major release of our full-featured development environment. The package is now available on PyPI and conda-forge. You can upgrade by running pip install --upgrade jupyterlab or conda install -c conda-forge jupyterlab. We…

Great release! Over the last months I learned so much through jupyterlab. [image] Thanks for not breaking any of my kernels, therefore i can forgive breaking most of my extensions :smiley:

It seems conda update --all won’t upgrade to JupyterLab 4.0. Is this expected (like maybe I have to wait until it is fed into the “stable channels” or something?)

Joining this question. I don’t understand how to upgrade to JupyterLab 4.0.

I’m not sure which conda channel you’re using, but using conda-forge, you should be able to install version 4: conda install -c conda-forge jupyterlab=4

Guys please post a compatibility matrix somewhere prominent. I have developed an extension with the cookiecutter template, JL 3.x, and now to migrate to JL 4.x leaving backward compatibility (even only partial) with the workflows I had in 3.x is a painful task, even using the recommended migration …

@gianfa there are plans to address these points by a new working group being bootstrapped, feel welcome to join with constructive feedback: Plugin and extension system working group · Issue #209 · jupyterlab/team-compass · GitHub

I just upgraded to version 4.0.9, and I cannot run jupyter lab anymore. I removed the problematic extension I had, but it still does not work. Is it related to notebook 7? I went to the link and I did not understand what I should do. This is the error I see % jupyter lab [W 2023-12-09 13:26:05.0…

@roiho would you mind opening a bug report on Sign in to GitHub · GitHub please? This looks like a severe issue but since thusands of users never encountered this I suspect it is something very specific to your installation, or a very new issue that however is going to solve will need much more cont…

Actually, looking at Jupyter lab cannot start - conflicting versions? - #2 by krassowski it seems your problem is in mixing conda and pip which leads to conficling versions being installed. Maybe Anaconda support would be more appropriate place to inquire about proper use of conda?

JupyterLab 4 is here!

JupyterLab

roiho December 9, 2023, 3:43pm 12

you are completely right. the solution was to uninstall jupyter lab using pip. see this post.

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Jupyterlab Upgrade JupyterLab release , how-to	5	4594	October 14, 2019
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JupyterLab 4 is here!

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