NBClassic runs the Jupyter Notebook frontend on the Jupyter Server backend.

This project prepares for a future where JupyterLab and other frontends switch to Jupyter Server for their Python Web application backend. Using this package, users can launch Jupyter Notebook, JupyterLab and other frontends side-by-side on top of the new Python server backend.

Install from PyPI:

> pip install nbclassic

This will automatically enable the extension in Jupyter Server.

Launch directly:

> jupyter nbclassic

Alternatively, you can run Jupyter Server and visiting the /tree endpoint:

> jupyter server

This project also includes an API for shimming traits that moved from NotebookApp in to ServerApp in Jupyter Server. This can be used by applications that subclassed NotebookApp to leverage the Python server backend of Jupyter Notebooks. Such extensions should now switch to ExtensionApp API in Jupyter Server and add NBClassicConfigShimMixin in their inheritance list to properly handle moved traits.

For example, an application class that previously looked like:

from notebook.notebookapp import NotebookApp

class MyApplication(NotebookApp):

should switch to look something like:

from jupyter_server.extension.application import ExtensionApp
from nbclassic.shim import NBClassicConfigShimMixin

class MyApplication(NBClassicConfigShimMixin, ExtensionApp):