On: Show HN: I Wrote a Book on Java

[cbsmith]

That seems a lot like duck typing to me.

[maleldil → cbsmith]

Yes, it is. Typed Python supports duck typing to some extent; see typing.Protocol and stuff like Sequence, Iterable, Mapping, etc.

[cbsmith → maleldil]

I'd argue non-typed Python supports duck typing pretty well too, so you don't necessarily need Typed Python to support it.