Polynote

What Polynote is

Polynote is a free, open-source notebook application with first-class Scala support. A notebook can combine multiple languages and share data between them, including Scala and Python. Polynote's immutable data model and ordered cell semantics are intended to encourage reproducible notebooks. Editing features include autocomplete, error highlighting, rich text and LaTeX equations in text cells. While code runs, the interface tracks kernel tasks and highlights the active statement. It includes a plot editor and support for the Vega visualization language, and it integrates with Apache Spark for Scala and Python workloads. Python executes through Jep within the JVM and can share data with Scala. Polynote runs as a JVM-based server that serves a web client, and it supports Jupyter .ipynb and Zeppelin .json notebook formats. It requires a working Python 3 environment, including pip; the documentation reports successful testing with Java 8 and Java 11. Its installation documentation warns that arbitrary remote code execution is possible, making an internet-accessible installation unsafe.