pyre-check
Performant type-checking for python. (by facebook)
typing
Python static typing home. Hosts the documentation and a user help forum. (by python)
| pyre-check | typing | |
|---|---|---|
| 24 | 42 | |
| 7,056 | 1,664 | |
| 0.4% | 0.2% | |
| 10.0 | 8.6 | |
| 10 days ago | 18 days ago | |
| OCaml | Python | |
| MIT License | GNU General Public License v3.0 or later |
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
pyre-check
Posts with mentions or reviews of pyre-check.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2024-04-11.
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Pylyzer – A fast static code analyzer and language server for Python
Did you come across pyre in your search? MIT license and pretty fast.
https://github.com/facebook/pyre-check
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Enhance Your Project Quality with These Top Python Libraries
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.
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A Tale of Two Kitchens - Hypermodernizing Your Python Code Base
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.
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Ruff v0.1.0
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
- Should I Rust or should I Go
- Writing Python like it's Rust
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Buck2, a large scale build tool written in Rust by Meta, is now available
Internally we use Pyre for Python type checking: https://github.com/facebook/pyre-check
- Are there any sectors that use Haskell as a main programming language?
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It is becoming difficult for me to be productive in Python
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.
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Ruby 3.2’s YJIT is Production-Ready
Python now has an optional type system and if you add one of them such as mypy or pyre to your CI process and you can configure GitHub to refuse the pull request until types are added you can make it somewhat strongly typed.
If you have a preexisting codebase I believe the way you can convert it is to add the types that you know on commits and eventually you will have enough types that adding the missing ones should be easy. For the missing ones Any is a good choice.
https://pyre-check.org and https://github.com/python/mypy are popular.
typing
Posts with mentions or reviews of typing.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2025-05-07.
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Ty: An fast Python type checker and language server, written in Rust
Two examples that come to mind are: https://discuss.python.org/t/pep-692-using-typeddict-for-mor...
and: https://github.com/python/typing/issues/1252
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Python Type System Conformance Test Results
preview: <https://htmlpreview.github.io/?https://github.com/python/typ...>
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Astral: Next-Gen Python Tooling
Pyright was itself a big improvement over Mypy. Just look at this for starters: https://htmlpreview.github.io/?https://github.com/python/typ...
If Astral can leapfrog pyright too, great. But I think it will be significantly harder than leapfrogging flake8 and black.
- Writing Python like it’s Rust
- Library for single dispatch on Generic subscript
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Thoughts on nested / inner functions in Python for better encapsulation and clarity?
Iterable[str] is unfortunately evil as it matches str which is often unintended. (see: https://github.com/python/typing/issues/256) One would need both NOT-type and AND-type in order to properly handle these.
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How to be more Literal in Python
The basic motivation behind them is that functions can have arguments that can only take a specific set of values, and those functions return values/types change based on that input. Common examples are (you can find more here):
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Python 3.11.0b1 is out! Python 3.11 is now in feature freeze mode!
While yes 26 people liked the idea here: https://github.com/python/typing/issues/193
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Type Hinting - Constrain metaclass of typing.Type
but looking at relevant issues on GitHub it seems this has been shot down repeatedly. python/typing#18, python/typing#213
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What type hint should I use for "some container type" in general but explicitly exclude the str type?
See https://github.com/python/typing/issues/256 for a discussion.
What are some alternatives?
When comparing pyre-check and typing you can also consider the following projects:
typeshed - Collection of library stubs for Python, with static types
pydantic - Data validation using Python type hints
pyright - Static Type Checker for Python
mypy - Optional static typing for Python
pytype - A static type analyzer for Python code
mashumaro - Fast and well tested serialization library