pyre-check VS pyright

is used with the type checkers such as mypy, pyright, pyre-check, pytype, etc.

Did you come across pyre in your search? MIT license and pretty fast.

https://github.com/facebook/pyre-check

Pyre is a performant type-checker developed by Facebook. Pyre can analyse codebases with millions of lines of code incrementally – providing instantaneous feedback to developers as they write code.

Pyre from Meta, pyright from Microsoft and PyType from Google provide additional assistance. They can 'infer' types based on code flow and existing types within the code.

Have you seen Pyre[0]? Not Rust, OCaml, and pretty fast. Made by a team at Meta and open sourced on GitHub. If you use python-lsp, I wrote an extension[1] to enable integration (though I haven't tested it recently, been programming in rust; it is mostly a "for me" extension).

0: https://pyre-check.org/

1: https://github.com/cricalix/python-lsp-pyre

Internally we use Pyre for Python type checking: https://github.com/facebook/pyre-check

Before type hinting, work had intense rules and linters enforcing docstrings with types. Now, type hints and automatic pyre runs take care of all the heavy lifting.

Now that I have started my Python project devto-followers2md, I have recently started checking my code with Ruff, a fast Rust-based Python linter and code formatter. I also started using pyright, (yes, I know it is very ironic, it is made by Microsoft), and will be working on making sure the project aligns with its standards too.

is used with the type checkers such as mypy, pyright, pyre-check, pytype, etc.

mypy (and pyright occasionally) as a type checker,

They identified this as a bug and fixed it, then changed course and decided to reinstate the behaviour. So if you want to write idiomatic Python, you need to disable typechecking TypedDicts.

— https://github.com/microsoft/pyright/issues/1739

Now if this were a linter then I would understand. But a type checker should not be opinionated to the point of pushing people not to use idiomatic Python.

Pyright:

This is a good summary: https://github.com/microsoft/pyright/blob/main/docs/mypy-com...

But without that, I always felt like I was actively fighting mypy. It seemed like it was written for a totally different language than Python.

Compared to another more modern type system like TypeScript, sometimes you don't explicitly type something and yet TypeScript usually does exactly what you expect.

We have it already: https://github.com/microsoft/pyright

Python (pyright)