# Notebook

A document interleaving code, output, and prose. The primary interface for writing Python in EugoIDE.

Source: https://university.eugo.io/glossary/notebook

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Where you write code, not where it runs once a cluster is involved. The distinction matters for file paths and installed packages: a library available to your notebook is not automatically available on a compute node.

## Related terms

- [EugoIDE](https://university.eugo.io/glossary/eugoide) — The browser-based notebook environment where you write and run Python on Eugo. Built on JupyterLab, connected to compute in your workspace.
- [Interactive session](https://university.eugo.io/glossary/interactive-session) — A running EugoIDE instance attached to your workspace. It is where you write code; a cluster is what runs it at scale.