Installing jupyterlab-lsp

JupyterLab
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In JupyterLab 3.3.2 running within a browser on Windows, I installed jupyterlab-lsp via the Extension Manager. I didn’t get any error, but I don’t believe that JupyterLab has detected the enabled extension. Does jupyterlab-lsp require installing a Python language server? I don’t see either jedi-language-server or pylsp in the Extension Manager. Will I need to rebuild JupyterLab? If yes, how can I do so within the browser? Thanks.

P.S. nbviewer can’t install extensions within the browser?

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jupyterlab-lsp require installing a Python language server

yes. Installation — Language Server Protocol integration for Jupyter[Lab]

need to rebuild JupyterLab

no, it includes a pre-built extension. but the jupyter_server process needs to be restarted.

nbviewer can’t install extensions

no.

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Does Extension Manager have any Python language server? Thanks.