$ python -c "import this" | grep purity Although practicality beats purity.

You probably meant to write "statically typed"

Python doesn't have just hinting, it has an optional static typechecker.

Anyhow, I don't see it's weirder than static languages adding the option to use “dynamic” as a pseudotype to opt out of static typing on a case by case basis.

Languages are more than typing regimes, and language designers can believe that there is no one typing regime that is right for all use cases.