Install free-threaded python 3.14.0rc2 from python.org using the Windows installer (installer file: python-3.14.0rc2-amd64.exe) Open a command-line window and type: pip install jupyterlab Multiple ...
I am not super sure that this is a bug in jupyterlab-lsp, because it may be a bug in python-lsp-server, its Ruff plugin (python-lsp-ruff) or Ruff itself. However, I thought that I will report it here, ...