> Does modern, production-level python code use types everywhere? I don't know about code inside companies, but most new open source projects I encounter use t

> Does modern, production-level python code use types everywhere? I don't know about code inside companies, but most new open source projects I encounter use typing. Many old ones have been converted too. > Is duck typing frowned upon? No. You can use Protocols to define what shape you expect your duck to be. There's some discussion about whether you should use abstract classes or protocols, though.