nbformat contains the reference implementation of the Jupyter Notebook format, and Python APIs for working with notebooks.

There is also a JSON schema for notebook format versions >= 3.

From the command line:

pip install nbformat

You can install and use fastjsonschema by running:

pip install nbformat[fast]

To enable fast validation with fastjsonschema, set the environment variable NBFORMAT_VALIDATOR to the value fastjsonschema.

This library supported Python 2.7 and Python 3.5+ for 4.x.x releases. With Python 2's end-of-life nbformat 5.x.x supported Python 3 only. Support for Python 3.x versions will be dropped when they are officially sunset by the python organization.

Read CONTRIBUTING.md for guidelines on how to setup a local development environment and make code changes back to nbformat.