It depends on what you want to do.
If it's building web apps there's Ruby on Rails, which is written in Ruby. In my opinion there's no alternative to this in Python. Sure there's Django but it's not the same even though both are considered batteries included web frameworks.
One nice thing is you'll find both Python and Ruby SDKs for a ton of third party services (like Stripe, etc.). That goes a long ways for building things quickly and with confidence.
Ruby's package manager is also a lot better IMO. It supports proper lock files out of the box and everyone uses gems with bundler. In Python it's a mix of pip, pipenv, poetry, etc. all of which have their own unique issues. With Ruby I never felt like I had to battle this aspect of the language. You just bundle install what you want and creating gems is the same process.