Update the Scala for Python devs page

[OlegAlexander]

Hello! I'm an experienced Python dev who's new to Scala. I was reading the Scala 3 book and noticed a few inaccuracies/omissions on the Scala for Python devs page.

For example:

• Python has type hints that are checked by the mypy type checker.
• Scala case classes == Python dataclasses.
• Python supports metaprogramming in the forms of codegen+eval, monkey-patching, and ast transformations.

Would anyone mind if I submitted a PR to address some of these?

[bishabosha]

I'd support the first two, the third seems like it would be quite verbose, and its not really equivalent

[OlegAlexander]

Thanks for your reply, @bishabosha!

For the third point about metaprogramming, I was actually thinking of removing text rather than adding it. The issue I was having when reading that page was mainly the section called "Concepts that are unique to Scala". There are 3 bullet points I'd remove from that list because these things are, in fact, available in modern Python:

• Case classes (Dataclasses added in Python 3.7)
• Pattern matching and match expressions (added in Python 3.10)
• Metaprogramming (has always been well supported because of dynamic typing)

So my plan is to delete those 3 points, add a little bit of info about Python type hints, and fix any other issues I find with a very light touch. I have no plans to make drastic changes to that page because it's already very good.

Does that sound good to you?

[bishabosha]

Hey, thank you for laying out your plan, I'd say go ahead with the PR!

[OlegAlexander]

I submitted my PR. Please let me know if you'd like me to make any changes. Thank you.