Go has one of the best stdlib I've come across. It's very well written and documented, the code is extraordinarily clean and easy to understand, even for advanced topics like cryptography (of course you need some fundamental understanding here).

I think it's comparable to Python.

Go's stdlib was one of the reasons I ended up with Go instead of Rust (might have changed; Rust had a lot community content, but not a comprehensive stdlib; last checked 3-4 years ago).