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Top 18 Python Type Projects
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Project mention: Ty: An fast Python type checker and language server, written in Rust | news.ycombinator.com | 2025-05-07
https://github.com/python/mypy/blob/501a07b45af8e44eda665e53...
Also did you know mypy ignores typing of class decorators? You simply can't return a different type other than type[thisclass].
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pytype is based in part upon byterun https://github.com/google/pytype/blob/main/docs/developers/i...
I learnt a lot about bytecode interpreters from working on it, and it helped me understand the cpython source code a lot more easily from having played with a python translation of it first.
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Project mention: Ty: An fast Python type checker and language server, written in Rust | news.ycombinator.com | 2025-05-07
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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Stream
Stream - Scalable APIs for Chat, Feeds, Moderation, & Video. Stream helps developers build engaging apps that scale to millions with performant and flexible Chat, Feeds, Moderation, and Video APIs and SDKs powered by a global edge network and enterprise-grade infrastructure.
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Maat
Validation and transformation library powered by recursive descent validation algorithm. Made to be extended for any kind of project.
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compressio
Lossless in-memory compression of pandas DataFrames and Series powered by the visions type system. Up to 10x less RAM needed for the same data.
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Poly
A Fluid, PolyMorphic,and shapeless Types Package that activates radically flexiblity and simplicity in your programs (by kyegomez)
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db-introspector-gadget
This is a CLI tool that can introspect MySQL or Postgres databases and generate a python file that contains TypedDict definitions for the tables and columns in the provided database schema.
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SaaSHub
SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives
Python Types discussion
Python Types related posts
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Ty: An fast Python type checker and language server, written in Rust
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Mypy β an optional static type checker for Python
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You Need Subtyping
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Astral β "We're building a new static type checker for Python"
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Python Type System Conformance Test Results
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Duck Typing Meets Type Hints: Using Protocols in Python
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Free-threaded CPython is ready to experiment with
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A note from our sponsor - InfluxDB
www.influxdata.com | 14 Jul 2025
Index
What are some of the best open-source Type projects in Python? This list will help you:
# | Project | Stars |
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1 | mypy | 19,494 |
2 | pytype | 4,904 |
3 | typeshed | 4,731 |
4 | Schematics | 2,586 |
5 | typing | 1,664 |
6 | sqlalchemy-stubs | 575 |
7 | typed-argument-parser | 572 |
8 | traits | 454 |
9 | pyanalyze | 369 |
10 | lagom | 318 |
11 | pfun | 150 |
12 | celery-types | 109 |
13 | Maat | 30 |
14 | compressio | 28 |
15 | Poly | 9 |
16 | db-introspector-gadget | 1 |
17 | thsl | 1 |
18 | typebuf | 0 |