JupyterLab stores the main build of JupyterLab with associated data, including extensions in Application Directory. The default Application Directory is the JupyterLab installation directory where is read-only for OSC users. Unlike Jupyter Notebook, JupyterLab cannot accommodate multiple paths for extensions management. Therefore we set the user's home directory for Application Directory so as to allow user to manage extensions.
Manage and install extensions
After launching a JupyterLab session, open a notebook and run
!jupyter lab path
Check if home directory is set for to the Application Directory
Application directory: /users/PXX1234/user/.jupyter/lab/3.0 User Settings directory: /users/PXX1234/user/.jupyter/lab/user-settings Workspaces directory: /users/PXX1234/user/ondemand/data/sys/dashboard/batch_connect/dev/bc_osc_jupyter/output/f2a4f918-b18c-4d2a-88bc-4f4e1bdfe03e
If home directory is NOT set, try removing the corresonding directory, e.g. if you are using JupyterLab 2.2, remove the entire directory
$HOME/.jupyter/lab/2.2 and re-launch JupyterLab 2.2.
If this is the first time to use extension or use extensions that are installed with different Jupyter version or on different cluster, you will need to run
!jupyter lab build
to initialize the JupyterLab application.
To manage and install extensions, simply click Extension Manager icon at the side bar: