State of Python support in Scala tooling

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1. Community sponsors State of Python support in Scala tooling Alex Archambault
2. PARIS 2022 Who am I? Alex Archambault • Doing Scala professionally since 2013 • Involved in Open Source Scala since 2014 • Author of coursier, Almond, now Scala CLI (with VirtusLab) • Also contributor of Ammonite, shapeless, …
3. PARIS 2022 Why? What should be the future of Scala? • Python-like “general purpose programming language” ◦ What about direct interaction with Python from Scala?
4. PARIS 2022 How? ScalaPy • Embed a Python interpreter in the JVM process (via libpython) • Provides a high-level Scala API for it • Handles JVM vs Python objects lifecycle • Allows to write typed wrappers for Python libs • Supports both JVM and Scala Native • See Shadaj Laddad talks on YouTube
5. PARIS 2022 How? ScalaPy requirements • JVM: load libpython via JNA • Scala Native: linking with libpython • both: libpython around at runtime Relies on Kien Dang’s scalapy/python-native-libs
6. PARIS 2022 Goal Just access ScalaPy’s py when you enable Python support --python OR //> using python py.Dynamic.global.list(1, 2)
7. PARIS 2022 What we have: Scala CLI • run • package • repl • publish
8. PARIS 2022 What we have: coursier • launch • bootstrap • install?
9. PARIS 2022 What we have: Ammonite • Jedi-based completion ◦ all Kien Dang’s work (GSOC 2021) ◦ not merged upstream :|
10. PARIS 2022 What we miss • IDE ◦ completions for scripts • Python packaging ◦ Python breaks reproducibility for now 😬 • What about Python to JVM? • py4j
11. PARIS 2022 [Section title]
12. PARIS 2022 [Slide title] // For code, we recommend a monoscript font (eg. Fira Code) @tailrec def fixedPoint[A](f: A => A)(x0: A, limit: Int = 100): Option[A] = if (limit == 0) None else { val x = f(x0) if (x == x0) Some(x0) else fixedPoint(f)(x, limit - 1) }
13. Community sponsors Thanks for your attention! Questions?