skybison VS beartype

Check out our handle implementation here.

This is what we did in Skybison and it worked just fine.

The codebases have very similar naming patterns and structures that mean that once you've read one, the others are much easier to understand. Check out, for example, Dart's VM. Or https://github.com/facebookexperimental/skybison

Guido appears to have meant to refer to Skybison (https://github.com/facebookexperimental/skybison), which is not 100% compatible.

In particular, what was the performance impact of your moving GC? (The documentation for the GC, https://github.com/facebookexperimental/skybison/blob/trunk/doc/garbage-collection.md, appears to be a dead link, is it present somewhere?)

https://github.com/beartype/beartype

I wish more people started using Beartype, it makes Python bearable

I saw this on /r/Python the other day...

As other folks have commented, type hints are now a big deal. For static typing the best checker is pyright. For runtime checking there is typeguard and beartype. These can be integrated with array libraries through jaxtyping. (Which also works for PyTorch/numpy/etc., despite the name.)

Maybe you're looking for https://github.com/beartype/beartype for runtime type enforcement; it's only at function calls, though, but probably a decent solution for codebases that are not completely typed for MyPy or pyright.

It is though, if you add a type checker to your pipeline and use it without any escape hatches such as `Any` or `type: ignore`, you are essentially making the promise that your code is statically typed. But I say it is a matter of perspective because in my opinion runtime type checking should be avoided if we can get away with statically typed code, but there are type checkers that perform runtime type checking via annotations such as [Beartype](https://github.com/beartype/beartype) (with some trickery like assuming homogenous data structures as to not have to check every element of every structure). Anyway the definition of "type safe" is not 100% even in compiled languages.

There is the beartype project.

Personally I find working around mypy's quirks to be more effort than it's worth, so to offer another option: typeguard or beartype can be used to perform run-time type checking.